android 循环滚动实现

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本文介绍了一种自定义的Android循环拖动组件实现方案，通过创建一个名为ViewpagertestActivity的活动来演示如何使用自定义的MyFrameLayout进行循环滚动效果。此组件能够实现平滑过渡和手势识别等功能。

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自定义android循环拖动组件

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001	package com.sunny.pager;

002

003	import java.util.HashMap;

004	import java.util.Map;

005

006	import android.app.Activity;

007	import android.content.Context;

008	import android.graphics.Bitmap;

009	import android.graphics.BitmapFactory;

010	import android.graphics.Color;

011	import android.os.Bundle;

012	import android.os.Environment;

013	import android.util.Log;

014	import android.view.MotionEvent;

015	import android.view.View;

016	import android.view.View.OnTouchListener;

017	import android.view.ViewGroup;

018	import android.view.Window;

019	import android.view.WindowManager;

020	import android.view.animation.AlphaAnimation;

021	import android.view.animation.Animation.AnimationListener;

022	import android.view.animation.AnimationSet;

023	import android.view.animation.ScaleAnimation;

024	import android.widget.BaseAdapter;

025	import android.widget.ImageView;

026	import android.widget.LinearLayout;

027	import android.widget.TextView;

028	import android.widget.VideoView;

029

030	public class ViewpagertestActivity extends Activity {

031	private static Context mContext;

032	private MyFrameLayout mGallery;

033	int[] color = {Color.CYAN, Color.BLUE, Color.GREEN, Color.RED, Color.GRAY, Color.YELLOW, Color.DKGRAY,

034	Color.LTGRAY, Color.MAGENTA};

035	static String[] str = {"http://www.yoho.cn", "http://www.hibox.com/web/"};

036	private int count = 9;

037	/** Called when the activity is first created. */

038

039	public void onCreate(Bundle savedInstanceState) {

040	super.onCreate(savedInstanceState);

041

042	getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);

043	/** 标题是属于View的，所以窗口所有的修饰部分被隐藏后标题依然有效 */

044	requestWindowFeature(Window.FEATURE_NO_TITLE);

045	Map<Integer, int[]> mapIndexs = new HashMap<Integer, int[]>();

046	mapIndexs.put(0, new int[]{0, 1, 2});

047	mapIndexs.put(1, new int[]{3, 4, 5});

048	mapIndexs.put(2, new int[]{6, 7, 8});

049	mGallery = new MyFrameLayout(this, mapIndexs);

050	setContentView(mGallery);

051

052	mContext = this;

053	// LinearLayout layout = (LinearLayout) findViewById(R.id.main_layout);

054

055	mGallery.setAdapter(baseAdapter);

056	LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.FILL_PARENT,

057	LinearLayout.LayoutParams.FILL_PARENT);

058	// layout.addView(mGallery, layoutParams);

059

}

060

061

@Override

062	public boolean onTouchEvent(MotionEvent event) {

063	// TODO Auto-generated method stub

064	//requestDisallowInterceptTouchEvent(true);

065	Boolean falg = mGallery.onGalleryTouchEvent(event);

066	return falg;

067

}

068

069	static class ViewHolder {

070	// TextView tView;

071	LinearLayout layout;

072	TextView tView;

073	ImageView image;

074	VideoView video;

075

}

076	public static Bitmap decodeSampledBitmapFromResource(String iamgePath, int reqWidth, int reqHeight) {

077	// First decode with inJustDecodeBounds=true to check dimensions

078	final BitmapFactory.Options options = new BitmapFactory.Options();

079	options.inJustDecodeBounds = true;

080	BitmapFactory.decodeFile(iamgePath, options);

081	// Calculate inSampleSize

082	options.inSampleSize = calculateInSampleSize(options, reqWidth, reqHeight);

083	// Decode bitmap with inSampleSize set

084	options.inJustDecodeBounds = false;

085	return BitmapFactory.decodeFile(iamgePath, options);

086

}

087	public static int calculateInSampleSize(BitmapFactory.Options options, int reqWidth, int reqHeight) {

088	// Raw height and width of image

089	final int height = options.outHeight;

090	final int width = options.outWidth;

091	int inSampleSize = 1;

092	if (height > reqHeight \|\| width > reqWidth) {

093	if (width > height) {

094	inSampleSize = Math.round((float) height / (float) reqHeight);

095	} else {

096	inSampleSize = Math.round((float) width / (float) reqWidth);

097

}

098

}

099	return inSampleSize;

100

}

101

102	BaseAdapter baseAdapter = new BaseAdapter() {

103	ViewHolder holder = new ViewHolder();

104

@Override

105	public View getView(int position, View convertView, ViewGroup parent) {

106	holder.layout = new LinearLayout(mContext);

107	holder.layout.setOrientation(LinearLayout.VERTICAL);

108	holder.tView = new TextView(mContext);

109	holder.layout.addView(holder.tView);

110	if (position > 5) {

111	holder.tView.setText("第 3" + "屏第" + (position - 5) + "页");

112	holder.tView.setTextSize(18);

113	} else if (position > 2) {

114	holder.tView.setText("第 2" + "屏第" + (position - 2) + "页");

115	holder.tView.setTextSize(18);

116	} else {

117	holder.tView.setText("第 1" + "屏第" + (position + 1) + "页");

118	holder.tView.setTextSize(18);

119

}

120

121	holder.image = new ImageView(mContext);

122

123	holder.image.setImageBitmap(decodeSampledBitmapFromResource(Environment.getExternalStorageDirectory()

124	+ "/2234567.jpg", 300, 200));

125	if ((position + 1) % 2 == 0) {

126	LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(300, 200);

127	lp.setMargins(0, 0, 0, 0);

128

129	holder.layout.addView(holder.image, lp);

130	holder.video = new VideoView(mContext);

131	holder.video.setVideoPath("/mnt/sdcard/123456.mp4");

132	holder.video.start();

133	LinearLayout.LayoutParams lp1 = new LinearLayout.LayoutParams(300, 200);

134	lp1.setMargins(50, 220, 0, 0);

135	holder.layout.addView(holder.video, lp1);

136	} else {

137	LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(300, 200);

138	lp.setMargins(0, 0, 0, 0);

139	holder.layout.addView(holder.image, lp);

140

141	ImageView imageView = new ImageView(mContext);

142	imageView.setBackgroundColor(0xff123456);

143

144	LinearLayout.LayoutParams lp1 = new LinearLayout.LayoutParams(300, 200);

145	lp1.setMargins(0, 220, 0, 0);

146

147

148	* imageView.setOnClickListener(new OnClickListener() {

149

150	* @Override public void onClick(View v) { // TODO

151	* Auto-generated method stub AnimationSet animation =

152	* getFadeInAnimation(3000, 0, null); Toast.makeText(mContext,

153	* "动画----开始", Toast.LENGTH_SHORT).show();

154	* holder.image.startAnimation(animation); } });

155

156	AnimationSet animation = getFadeInAnimation(3000, 100, null);

157	holder.image.startAnimation(animation);

158	imageView.setOnTouchListener(new OnTouchListener() {

159	public boolean onTouch(View v, MotionEvent event) {

160	if (event.getAction() == MotionEvent.ACTION_MOVE) {

161

}

162	if (event.getAction() == MotionEvent.ACTION_DOWN) {

163	AnimationSet animation = getFadeInAnimation(3000, 100, null);

164	holder.image.startAnimation(animation);

165	// Toast.makeText(mContext, "动画----开始",

166	// Toast.LENGTH_SHORT).show();

167	return false;

168

}

169

170	return false;

171

}

172

});

173	holder.layout.addView(imageView, lp1);

174

}

175	holder.layout.setBackgroundColor(color[position]);

176	// holder.layout.setTag(holder);

177	return holder.layout;

178

}

179

180

@Override

181	public long getItemId(int position) {

182	// TODO Auto-generated method stub

183	return position;

184

}

185

186

@Override

187	public Object getItem(int position) {

188	// TODO Auto-generated method stub

189	return position;

190

}

191

192

@Override

193	public int getCount() {

194	// TODO Auto-generated method stub

195	return count;

196

}

197

};

198

199	public AnimationSet getFadeInAnimation(long durationMillis, long delay, AnimationListener listener) {

200	AlphaAnimation alphaAnim = null;

201	ScaleAnimation scaleAnimation = null;

202	if (delay < 0)

203	delay = 0;

204	if (durationMillis <= 100)

205	durationMillis = 300;

206	AnimationSet animationSet = new AnimationSet(true);

207	alphaAnim = new AlphaAnimation(1.0f, 0.0f);

208	scaleAnimation = new ScaleAnimation(1.0f, 0.1f, 1.0f, 0.1f);

209	alphaAnim.setDuration(durationMillis);

210	scaleAnimation.setDuration(durationMillis);

211	alphaAnim.setStartOffset(delay);

212	scaleAnimation.setStartOffset(delay);

213	animationSet.addAnimation(alphaAnim);

214	animationSet.addAnimation(scaleAnimation);

215	animationSet.setFillAfter(true);

216	if (listener != null)

217	alphaAnim.setAnimationListener(listener);

218	Log.v("animationSet", "Get animationSet: "+animationSet.toString());

219	return animationSet;

220

}

221

}

自定义逐渐基本功能实现，现在公开源码。

其中点击触发动画事件未能解决，ontouch 的down 事件响应，但是动画就是不播放，长安才能在首页播放，希望高手给点建议：

源码：

查看源码

打印

001	package com.sunny.pager;

002

003	import java.util.ArrayList;

004	import java.util.Map;

005	import java.util.Set;

006

007	import android.R.integer;

008	import android.content.Context;

009	import android.database.DataSetObserver;

010	import android.util.Log;

011	import android.view.GestureDetector;

012	import android.view.Gravity;

013	import android.view.KeyEvent;

014	import android.view.MotionEvent;

015	import android.view.View;

016	import android.view.ViewGroup;

017	import android.view.animation.Animation;

018	import android.view.animation.AnimationUtils;

019	import android.view.animation.Interpolator;

020	import android.view.animation.Transformation;

021	import android.widget.Adapter;

022	import android.widget.FrameLayout;

023	import android.widget.LinearLayout;

024	import android.widget.Toast;

025

026

// TODO:

027

028	// 1. In order to improve performance Cache screen bitmap and use for animation

029	// 2. Establish superfluous memory allocations and delay or replace with reused objects

030	// Probably need to make sure we are not allocating objects (strings, etc.) in loops

031

032	public class MyFrameLayout extends FrameLayout {

033	// Constants

034

035	private final int swipe_min_distance = 120;

036	private final int swipe_max_off_path = 250;

037	private final int swipe_threshold_veloicty = 350;

038

039	// Properties

040

041	private int mViewPaddingWidth = 0;

042	private int mAnimationDuration = 250;

043	private float mSnapBorderRatio = 0.5f;

044	private boolean mIsGalleryCircular = true;

045

046	// Members

047

048	private int mGalleryWidth = 0;

049	private int mGalleryHeight = 0;

050	private boolean mIsTouched = false;

051	private boolean mIsDragging = false;

052	private int[] mCurrentOffset = new int[2];

053	private long mScrollTimestamp = 0;

054	private int mFlingDirection = 0;

055	private int mCurrentPosition = 0;

056	public int mCurrentViewNumber = 0;

057

058	private Context mContext;

059	private Adapter mAdapter;

060	private FlingGalleryView[] mViews;

061	private FlingGalleryAnimation mAnimation;

062	private GestureDetector mGestureDetector;

063	private Interpolator mDecelerateInterpolater;

064	Map<Integer, int[]> mapIndexs;

065	private static final int MOVE_UP_DOWN = 0;

066	private static final int MOVE_LEFT_RIGHT = 1;

067	private int MoveStyle = -1;

068	private boolean direction = true;

069

070	//private int h_viewnumber;

071	//private int v_viewnumber;

072	private ArrayList<Integer> _xViewNumbers=new ArrayList<Integer>();

073	private ArrayList<Integer> _yViewNumbers=new ArrayList<Integer>();

074	public MyFrameLayout(Context context, Map<Integer, int[]> mapIndexs) {

075	super(context);

076	this.mapIndexs = mapIndexs;

077	mContext = context;

078	mAdapter = null;

079

080	mViews = new FlingGalleryView[5];

081	_xViewNumbers.add(1);

082	_xViewNumbers.add(0);

083	_xViewNumbers.add(2);

084	_yViewNumbers.add(3);

085	_yViewNumbers.add(0);

086	_yViewNumbers.add(4);

087	mViews[0] = new FlingGalleryView(0, this);

088	mViews[1] = new FlingGalleryView(1, this);

089	mViews[2] = new FlingGalleryView(2, this);

090	mViews[3] = new FlingGalleryView(3, this);

091	mViews[4] = new FlingGalleryView(4, this);

092	mAnimation = new FlingGalleryAnimation();

093	mGestureDetector = new GestureDetector(new FlingGestureDetector());

094	mDecelerateInterpolater = AnimationUtils.loadInterpolator(mContext, android.R.anim.decelerate_interpolator);

095

096

}

097

098	public void setPaddingWidth(int viewPaddingWidth) {

099	mViewPaddingWidth = viewPaddingWidth;

100

}

101

102	public void setAnimationDuration(int animationDuration) {

103	mAnimationDuration = animationDuration;

104

}

105

106	public void setSnapBorderRatio(float snapBorderRatio) {

107	mSnapBorderRatio = snapBorderRatio;

108

}

109

110	public void setIsGalleryCircular(boolean isGalleryCircular) {

111	if (mIsGalleryCircular != isGalleryCircular) {

112	mIsGalleryCircular = isGalleryCircular;

113

114	if (mCurrentPosition == getFirstPosition_RL()) {

115	// We need to reload the view immediately to the left to change

116	// it to circular view or blank

117	mViews[getPrevViewNumber_RL(mCurrentViewNumber)].recycleView(getPrevPosition_RL(mCurrentPosition));

118

}

119

120	if (mCurrentPosition == getLastPosition_RL()) {

121	// We need to reload the view immediately to the right to change

122	// it to circular view or blank

123	mViews[getNextViewNumber_RL(mCurrentViewNumber)].recycleView(getNextPosition_RL(mCurrentPosition));

124

}

125

126	if (mCurrentPosition == getFirstPosition_UD()) {

127	mViews[getPrevViewNumber_UD(mCurrentViewNumber)].recycleView(getPrevPosition_UD(mCurrentPosition));

128

}

129	if (mCurrentPosition == getLastPosition_UD()) {

130	mViews[getNextViewNumber_UD(mCurrentViewNumber)].recycleView(getPrevPosition_UD(mCurrentPosition));

131

}

132

}

133

}

134

135	public int getGalleryCount() {

136	return (mAdapter == null) ? 0 : mAdapter.getCount();

137

}

138	private int[] getXindexAndYindex(int value){

139	Set<Integer> set=mapIndexs.keySet();

140	int x_index=-1;

141	for(Integer i : set){

142	x_index++;

143	int[] temp=mapIndexs.get(i);

144	int y_index=-1;

145	for(int j :temp){

146	y_index++;

147	if(j==value)

148	return new int[]{x_index,y_index};

149

}

150

}

151	return new int[]{0,0};

152

153

}

154	public int getFirstPosition_RL() {

155	return 0;

156

}

157

158	public int getLastPosition_RL() {

159	Integer[] vs = mapIndexs.keySet().toArray(new Integer[0]);

160	return vs[vs.length - 1];

161

}

162

163	public int getLastPosition_All() {

164	return (getGalleryCount() == 0) ? 0 : getGalleryCount() - 1;

165

}

166

167	public int getFirstPosition_UD() {

168	int x_index=getXindexAndYindex(mCurrentPosition)[0];

169	return mapIndexs.get(x_index)[0];

170

}

171

172	public int getLastPosition_UD() {

173	int x_index=getXindexAndYindex(mCurrentPosition)[0];

174	return mapIndexs.get(x_index)[mapIndexs.get(x_index).length - 1];

175

}

176

177	private int getPrevPosition_RL(int relativePosition) {

178	int length = mapIndexs.keySet().size();

179	int lastindex = length - 1;

180	int x_index=getXindexAndYindex(relativePosition)[0];

181	x_index--;

182	if (x_index < 0) {

183	return mapIndexs.get(lastindex)[0];

184	} else {

185	return mapIndexs.get(x_index)[0];

186

}

187

}

188

189	private int getPrevPosition_UD(int relativePosition) {

190	int x_index=getXindexAndYindex(relativePosition)[0];

191	int y_index=getXindexAndYindex(relativePosition)[1];

192	int length = mapIndexs.get(x_index).length;

193	int lastindex = length - 1;

194	y_index--;

195	if (y_index < 0) {

196	return mapIndexs.get(x_index)[lastindex];

197	} else {

198	return mapIndexs.get(x_index)[y_index];

199

}

200

}

201

202	private int getNextPosition_RL(int relativePosition) {

203	int length = mapIndexs.keySet().size();

204	int x_index=getXindexAndYindex(relativePosition)[0];

205	int lastindex = length - 1;

206	x_index++;

207	if (x_index > lastindex) {

208	return mapIndexs.get(0)[0];

209	} else {

210	return mapIndexs.get(x_index)[0];

211

}

212

}

213

214	private int getNextPosition_UD(int relativePosition) {

215	int x_index=getXindexAndYindex(relativePosition)[0];

216	int y_index=getXindexAndYindex(relativePosition)[1];

217	int length = mapIndexs.get(x_index).length;

218	int lastindex = length - 1;

219	y_index++;

220	if (y_index > lastindex) {

221	return mapIndexs.get(x_index)[0];

222	} else {

223	return mapIndexs.get(x_index)[y_index];

224

}

225

}

226

227	private int getPrevViewNumber_RL(int relativeViewNumber) {

228	int index=_xViewNumbers.indexOf(relativeViewNumber);

229	index=(index == 0) ? 2 : index - 1;

230	return _xViewNumbers.get(index);

231

232

}

233

234	private int getNextViewNumber_RL(int relativeViewNumber) {

235

236	int index=_xViewNumbers.indexOf(relativeViewNumber);

237	index=(index == 2) ? 0: index + 1;

238	return _xViewNumbers.get(index);

239	// return (relativeViewNumber == 2) ? 0 : relativeViewNumber + 1;

240

}

241

242	private int getPrevViewNumber_UD(int relativeViewNumber) {

243	int index=_yViewNumbers.indexOf(relativeViewNumber);

244	index=(index == 0) ? 2 : index - 1;

245	Log.v("index-------------", index+"");

246	return _yViewNumbers.get(index);

247

248

249

}

250

251	private int getNextViewNumber_UD(int relativeViewNumber) {

252

253	int index=_yViewNumbers.indexOf(relativeViewNumber);

254	index=(index == 2) ? 0: index + 1;

255	return _yViewNumbers.get(index);

256

}

257

258

@Override

259	protected void onLayout(boolean changed, int left, int top, int right, int bottom) {

260	super.onLayout(changed, left, top, right, bottom);

261

262	// Calculate our view width

263	mGalleryWidth = (right - left);

264	mGalleryHeight = (bottom - top);

265	if (changed == true) {

266	// Position views at correct starting offsets

267	mViews[0].setOffset(0, 0, mCurrentViewNumber);

268	mViews[1].setOffset(0, 0, mCurrentViewNumber);

269	mViews[2].setOffset(0, 0, mCurrentViewNumber);

270	mViews[3].setOffset(0, 0, mCurrentViewNumber);

271	mViews[4].setOffset(0, 0, mCurrentViewNumber);

272

}

273

}

274

275	DataSetObserver observer = new DataSetObserver() {

276	public void onChanged() {

277	// mCurrentPosition = 0;

278	// mCurrentViewNumber = 0;

279	// Load the initial views from adapter

280	mViews[0].recycleView(0);

281	mViews[1].recycleView(getNextPosition_RL(0));

282	mViews[2].recycleView(getPrevPosition_RL(0));

283	mViews[3].recycleView(getNextPosition_UD(0));

284	mViews[4].recycleView(getPrevPosition_UD(0));

285	// Position views at correct starting offsets

286	mViews[0].setOffset(0, 0, 0);

287	mViews[1].setOffset(0, 0, 0);

288	mViews[2].setOffset(0, 0, 0);

289	mViews[3].setOffset(0, 0, 0);

290	mViews[4].setOffset(0, 0, 0);

291	mViews[mCurrentViewNumber].requestFocus();

292

}

293

};

294

295	public void setAdapter(Adapter adapter) {

296	if (null != mAdapter && adapter != null && mAdapter.equals(adapter)) {

297	mAdapter.unregisterDataSetObserver(observer);

298

}

299	mAdapter = adapter;

300

301	mAdapter.registerDataSetObserver(observer);

302

303	mCurrentPosition = 0;

304	mCurrentViewNumber = 0;

305

306	// Load the initial views from adapter

307	mViews[0].recycleView(mCurrentPosition);

308	mViews[1].recycleView(getPrevPosition_RL(mCurrentPosition));

309	mViews[2].recycleView(getNextPosition_RL(mCurrentPosition));

310	mViews[3].recycleView(getPrevPosition_UD(mCurrentPosition));

311	mViews[4].recycleView(getNextPosition_UD(mCurrentPosition));

312	// Position views at correct starting offsets

313	mViews[0].setOffset(0, 0, mCurrentViewNumber);

314	mViews[1].setOffset(0, 0, mCurrentViewNumber);

315	mViews[2].setOffset(0, 0, mCurrentViewNumber);

316	mViews[3].setOffset(0, 0, mCurrentViewNumber);

317	mViews[4].setOffset(0, 0, mCurrentViewNumber);

318

}

319

320	private int getViewOffset(int viewNumber, int relativeViewNumber) {

321

322	int offsetWidth = mGalleryWidth + mViewPaddingWidth;

323	// Position the previous view one measured width to left

324	if (viewNumber == getPrevViewNumber_RL(relativeViewNumber)) {

325	return offsetWidth;

326

}

327	// Position the next view one measured width to the right

328	if (viewNumber == getNextViewNumber_RL(relativeViewNumber)) {

329	return offsetWidth * -1;

330

}

331	int offsetHeight = mGalleryHeight + mViewPaddingWidth;

332	// Position the previous view one measured width to left

333	if (viewNumber == (getPrevViewNumber_UD(relativeViewNumber))) {

334	return offsetHeight;

335

}

336	// Position the next view one measured width to the right

337	int num = getNextViewNumber_UD(relativeViewNumber);

338	if (viewNumber == (num)) {

339	return offsetHeight * -1;

340

}

341	return 0;

342

}

343

344	public void movePrevious_RL() {

345	// Slide to previous view

346	mFlingDirection = 1;

347	processGesture();

348

}

349

350	public void moveNext_RL() {

351	// Slide to next view

352	mFlingDirection = -1;

353	processGesture();

354

}

355

356	public void movePrevious_UD() {

357	// Slide to previous view

358	mFlingDirection = 2;

359	processGesture();

360

}

361

362	public void moveNext_UD() {

363	// Slide to next view

364	mFlingDirection = -2;

365	processGesture();

366

}

367

368

@Override

369	public boolean onKeyDown(int keyCode, KeyEvent event) {

370	switch (keyCode) {

371	case KeyEvent.KEYCODE_DPAD_LEFT :

372	movePrevious_RL();

373	MoveStyle = MOVE_LEFT_RIGHT;

374	return true;

375

376	case KeyEvent.KEYCODE_DPAD_RIGHT :

377	moveNext_RL();

378	MoveStyle = MOVE_LEFT_RIGHT;

379	return true;

380	case KeyEvent.KEYCODE_DPAD_UP :

381	movePrevious_UD();

382	MoveStyle = MOVE_UP_DOWN;

383	return true;

384

385	case KeyEvent.KEYCODE_DPAD_DOWN :

386	moveNext_UD();

387	MoveStyle = MOVE_UP_DOWN;

388	return true;

389

390	case KeyEvent.KEYCODE_DPAD_CENTER :

391	case KeyEvent.KEYCODE_ENTER :

392

}

393

394	return super.onKeyDown(keyCode, event);

395

}

396

397	public boolean onGalleryTouchEvent(MotionEvent event) {

398	// TODO Auto-generated method stub

399	switch (event.getAction()) {

400	case MotionEvent.ACTION_DOWN : {

401	mLastMotionX = event.getX();

402	mLastMotionY = event.getY();

403	break;

404

}

405	case MotionEvent.ACTION_MOVE : {

406	final float x = event.getX();;

407	final float dx = x - mLastMotionX;

408	final float xDiff = Math.abs(dx);

409	final float y = event.getY();

410	final float yDiff = Math.abs(y - mLastMotionY);

411	if (xDiff > yDiff) {

412	MoveStyle = MOVE_LEFT_RIGHT;

413	} else {

414	if (yDiff > xDiff) {

415	MoveStyle = MOVE_UP_DOWN;

416

}

417

}

418	break;

419

}

420

}

421	boolean consumed=false;

422	if(direction){

423	consumed = mGestureDetector.onTouchEvent(event);

424

}

425	if (event.getAction() == MotionEvent.ACTION_UP) {

426	//Toast.makeText(mContext, "ACTION_UP", Toast.LENGTH_SHORT).show();

427	if (mIsTouched \|\| mIsDragging) {

428

429	direction = false;

430	processScrollSnap();

431	processGesture();

432	Toast.makeText(mContext, "processGesture", Toast.LENGTH_SHORT).show();

433	Log.v("ViewNumbers", "_xViewNumbers :"+ _xViewNumbers.get(0)+ _xViewNumbers.get(1)+ _xViewNumbers.get(2)+

434	"_yViewNumbers :"+ _yViewNumbers.get(0)+ _yViewNumbers.get(1)+ _yViewNumbers.get(2) );

435

}

436

}

437	//Toast.makeText(mContext, "consumed : "+consumed, Toast.LENGTH_SHORT).show();

438	return consumed;

439

}

440	int recyclePositon;

441	int recycleViewNumber;

442

443	void processGesture() {

444	int newViewNumber = mCurrentViewNumber;

445	int reloadViewNumber = 0;

446	int reloadPosition = 0;

447	int reloadViewNumber_up = 0;

448	int reloadPosition_up = 0;

449	int reloadViewNumber_down = 0;

450	int reloadPosition_down = 0;

451

452	int reloadViewNumber_r = 0;

453	int reloadPosition_r = 0;

454	int reloadViewNumber_l = 0;

455	int reloadPosition_l = 0;

456	mIsTouched = false;

457	mIsDragging = false;

458

459	if (mFlingDirection == 1) {

460	if (mCurrentPosition > getFirstPosition_RL() \|\| mIsGalleryCircular == true) {

461	// Determine previous view and outgoing view to recycle

462	newViewNumber = getPrevViewNumber_RL(mCurrentViewNumber);

463	mCurrentPosition = getPrevPosition_RL(mCurrentPosition);

464

465	recycleViewNumber=mCurrentViewNumber;

466	recyclePositon=getNextPosition_RL(mCurrentPosition);

467

468	reloadViewNumber = getNextViewNumber_RL(mCurrentViewNumber);

469	reloadPosition = getPrevPosition_RL(mCurrentPosition);

470

471	reloadPosition_up = getPrevPosition_UD(mCurrentPosition);

472	reloadViewNumber_up = getPrevViewNumber_UD(mCurrentViewNumber);

473

474	reloadPosition_down = getNextPosition_UD(mCurrentPosition);

475	reloadViewNumber_down = getNextViewNumber_UD(mCurrentViewNumber);

476

477	int pre=getPrevViewNumber_RL(newViewNumber);

478	int next=getNextViewNumber_RL(newViewNumber);

479

480	_xViewNumbers.set(0, pre);

481	_xViewNumbers.set(1, newViewNumber);

482	_xViewNumbers.set(2, next);

483	_yViewNumbers.set(1, newViewNumber);

484

}

485

}

486	if (mFlingDirection == 2) {

487	if (mCurrentPosition > getFirstPosition_UD() \|\| mIsGalleryCircular == true) {

488	// Determine previous view and outgoing view to recycle

489	newViewNumber = getPrevViewNumber_UD(mCurrentViewNumber);

490	mCurrentPosition = getPrevPosition_UD(mCurrentPosition);

491	reloadViewNumber = getNextViewNumber_UD(mCurrentViewNumber);

492	reloadPosition = getPrevPosition_UD(mCurrentPosition);

493

494	reloadPosition_r = getPrevPosition_RL(mCurrentPosition);

495	reloadViewNumber_r = getPrevViewNumber_RL(mCurrentViewNumber);

496

497	reloadPosition_l = getNextPosition_RL(mCurrentPosition);

498	reloadViewNumber_l = getNextViewNumber_RL(mCurrentViewNumber);

499

500

501	int pre=getPrevViewNumber_UD(newViewNumber);

502	int next=getNextViewNumber_UD(newViewNumber);

503

504	_yViewNumbers.set(0, pre);

505	_yViewNumbers.set(1, newViewNumber);

506	_yViewNumbers.set(2, next);

507	_xViewNumbers.set(1, newViewNumber);

508

}

509

}

510

511	if (mFlingDirection == -1) {

512	if (mCurrentPosition < getLastPosition_RL() \|\| mIsGalleryCircular == true) {

513	// Determine the next view and outgoing view to recycle

514	newViewNumber = getNextViewNumber_RL(mCurrentViewNumber);

515	mCurrentPosition = getNextPosition_RL(mCurrentPosition);

516

517	recycleViewNumber=mCurrentViewNumber;

518	recyclePositon=getPrevPosition_RL(mCurrentPosition);

519

520	reloadViewNumber = getPrevViewNumber_RL(mCurrentViewNumber);

521	reloadPosition = getNextPosition_RL(mCurrentPosition);

522

523	reloadPosition_up = getPrevPosition_UD(mCurrentPosition);

524	reloadViewNumber_up =getPrevViewNumber_UD(mCurrentViewNumber) ;

525

526	reloadPosition_down = getNextPosition_UD(mCurrentPosition);

527	reloadViewNumber_down = getNextViewNumber_UD(mCurrentViewNumber);

528

529	int pre=getPrevViewNumber_RL(newViewNumber);

530	int next=getNextViewNumber_RL(newViewNumber);

531

532	_xViewNumbers.set(0, pre);

533	_xViewNumbers.set(1, newViewNumber);

534	_xViewNumbers.set(2, next);

535	_yViewNumbers.set(1, newViewNumber);

536

537

538

}

539

}

540

541	if (mFlingDirection == -2) {

542	if (mCurrentPosition < getLastPosition_UD() \|\| mIsGalleryCircular == true) {

543	// Determine the next view and outgoing view to recycle

544	newViewNumber = getNextViewNumber_UD(mCurrentViewNumber);

545	mCurrentPosition = getNextPosition_UD(mCurrentPosition);

546

547	reloadViewNumber = getPrevViewNumber_UD(mCurrentViewNumber);

548	reloadPosition = getNextPosition_UD(mCurrentPosition);

549

550	reloadPosition_r = getPrevPosition_RL(mCurrentPosition);

551	reloadViewNumber_r = getPrevViewNumber_RL(mCurrentViewNumber);

552

553	reloadPosition_l = getNextPosition_RL(mCurrentPosition);

554	reloadViewNumber_l = getNextViewNumber_RL(mCurrentViewNumber);

555

556	int pre=getPrevViewNumber_UD(newViewNumber);

557	int next=getNextViewNumber_UD(newViewNumber);

558

559	_yViewNumbers.set(0, pre);

560	_yViewNumbers.set(1, newViewNumber);

561	_yViewNumbers.set(2, next);

562	_xViewNumbers.set(1, newViewNumber);

563

}

564

}

565

566	if (newViewNumber != mCurrentViewNumber) {

567	mCurrentViewNumber = newViewNumber;

568	// Reload outgoing view from adapter in new position

569	if (MoveStyle == MOVE_LEFT_RIGHT) {

570	mViews[reloadViewNumber].recycleView(reloadPosition);

571	mViews[reloadViewNumber_up].recycleView(reloadPosition_up);

572	mViews[reloadViewNumber_down].recycleView(reloadPosition_down);

573	} else if (MoveStyle == MOVE_UP_DOWN) {

574	mViews[reloadViewNumber].recycleView(reloadPosition);

575	mViews[reloadViewNumber_r].recycleView(reloadPosition_r);

576	mViews[reloadViewNumber_l].recycleView(reloadPosition_l);

577

}

578

}

579

580	// Ensure input focus on the current view

581	mViews[mCurrentViewNumber].requestFocus();

582

583	// Run the slide animations for view transitions

584	mAnimation.prepareAnimation(mCurrentViewNumber);

585	this.startAnimation(mAnimation);

586

587	// Reset fling state

588	mFlingDirection = 0;

589

}

590

591	void processScrollSnap() {

592	// Snap to next view if scrolled passed snap position

593	if (MoveStyle == MOVE_LEFT_RIGHT) {

594	float rollEdgeWidth = mGalleryWidth * mSnapBorderRatio;

595	int rollOffset = mGalleryWidth - (int) rollEdgeWidth;

596	int currentOffset = mViews[mCurrentViewNumber].getCurrentOffset()[0];

597	if (currentOffset <= rollOffset * -1) {

598	// Snap to previous view

599	mFlingDirection = 1;

600

}

601	if (currentOffset >= rollOffset) {

602	// Snap to next view

603	mFlingDirection = -1;

604

}

605	} else if (MoveStyle == MOVE_UP_DOWN) {

606

607	float rollEdgeHeight = mGalleryHeight * mSnapBorderRatio;

608	int rollOffset_Y = mGalleryHeight - (int) rollEdgeHeight;

609	int currentOffset_Y = mViews[mCurrentViewNumber].getCurrentOffset()[1];

610	if (currentOffset_Y <= rollOffset_Y * -1) {

611	// Snap to previous view

612	mFlingDirection = 2;

613

}

614	if (currentOffset_Y >= rollOffset_Y) {

615	// Snap to next view

616	mFlingDirection = -2;

617

}

618

}

619

}

620

621	private class FlingGalleryView {

622	private int mViewNumber;

623	private FrameLayout mParentLayout;

624

625	private FrameLayout mInvalidLayout = null;

626	private LinearLayout mInternalLayout = null;

627	private View mExternalView = null;

628

629	public FlingGalleryView(int viewNumber, FrameLayout parentLayout) {

630	mViewNumber = viewNumber;

631	mParentLayout = parentLayout;

632

633	// Invalid layout is used when outside gallery

634	mInvalidLayout = new FrameLayout(mContext);

635	LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(LayoutParams.FILL_PARENT,

636	LayoutParams.FILL_PARENT);

637	lp.gravity = Gravity.CENTER;

638	mInvalidLayout.setLayoutParams(lp);

639

640	// Internal layout is permanent for duration

641	mInternalLayout = new LinearLayout(mContext);

642

643	mInternalLayout.setLayoutParams(lp);

644	mInternalLayout.setPersistentDrawingCache(ViewGroup.PERSISTENT_ALL_CACHES);

645	mParentLayout.addView(mInternalLayout, lp);

646

}

647

648	public void recycleView(int newPosition) {

649	if (mExternalView != null) {

650	mInternalLayout.removeView(mExternalView);

651

}

652

653	if (mAdapter != null) {

654	if (newPosition >= 0 && newPosition <= getLastPosition_All()) {

655	mExternalView = mAdapter.getView(newPosition, mExternalView, mInternalLayout);

656	} else {

657	mExternalView = mInvalidLayout;

658

}

659

}

660

661	if (mExternalView != null) {

662	mInternalLayout.addView(mExternalView, new LinearLayout.LayoutParams(LayoutParams.FILL_PARENT,

663	LayoutParams.FILL_PARENT));

664

}

665

}

666

667	public void setOffset(int xOffset, int yOffset, int relativeViewNumber) {

668	// Scroll the target view relative to its own position relative to

669	// currently displayed view

670	int distance = getViewOffset(mViewNumber, relativeViewNumber);

671	int x=mGalleryWidth + mViewPaddingWidth;

672	int y=mGalleryHeight + mViewPaddingWidth;

673	if(Math.abs(distance)==x){

674	mInternalLayout.scrollTo(distance + xOffset, yOffset);

675	}else if(Math.abs(distance)==y){

676	mInternalLayout.scrollTo(xOffset, distance + yOffset);

677	}else if(Math.abs(distance)==0){

678	mInternalLayout.scrollTo(xOffset, yOffset);

679

}

680	Log.v("Position", "mViewNumber: " + mViewNumber + " mCurrentViewNumber: " + mCurrentViewNumber+ " distance: " + distance);

681

682

}

683

684	public int[] getCurrentOffset() {

685	// Return the current scroll position

686	return new int[]{mInternalLayout.getScrollX(), mInternalLayout.getScrollY()};

687

}

688

689	public void requestFocus() {

690	mInternalLayout.setFocusable(true);

691	mInternalLayout.setFocusableInTouchMode(true);

692	mInternalLayout.requestFocus();

693

}

694

}

695

696	private class FlingGalleryAnimation extends Animation {

697	private boolean mIsAnimationInProgres;

698	private int mRelativeViewNumber;

699	private int mInitialOffset;

700	private int mTargetOffset;

701	private int mTargetDistance;

702

703	public FlingGalleryAnimation() {

704	mIsAnimationInProgres = false;

705	mRelativeViewNumber = 0;

706	mInitialOffset = 0;

707	mTargetOffset = 0;

708	mTargetDistance = 0;

709

}

710

711

712

@Override

713	public boolean getFillAfter() {

714	// TODO Auto-generated method stub

715	mViews[recycleViewNumber].recycleView(recyclePositon);

716	direction = true;

717	boolean falg=super.getFillAfter();

718	return falg;

719

}

720

721

722	public void prepareAnimation(int relativeViewNumber) {

723	// If we are animating relative to a new view

724	if (mRelativeViewNumber != relativeViewNumber) {

725	if (mIsAnimationInProgres == true) {

726	// We only have three views so if requested again to animate

727	// in same direction we must snap

728	int newDirection=0;

729	int animDirection = (mTargetDistance < 0) ? 1 : -1;

730	if (MoveStyle == MOVE_LEFT_RIGHT) {

731	newDirection = (relativeViewNumber == getPrevViewNumber_RL(mRelativeViewNumber)) ? 1 : -1;

732	// If animation in same direction

733	if (animDirection == newDirection) {

734	// Ran out of time to animate so snap to the target

735

// offset

736	mViews[_xViewNumbers.get(0)].setOffset(mTargetOffset, 0, mRelativeViewNumber);

737	mViews[_xViewNumbers.get(1)].setOffset(mTargetOffset, 0, mRelativeViewNumber);

738	mViews[_xViewNumbers.get(2)].setOffset(mTargetOffset, 0, mRelativeViewNumber);

739

}

740	} else if (MoveStyle == MOVE_UP_DOWN) {

741	newDirection = (relativeViewNumber == getPrevViewNumber_UD(mRelativeViewNumber)) ? 1 : -1;

742	if (animDirection == newDirection) {

743	// Ran out of time to animate so snap to the target

744

// offset

745	mViews[_yViewNumbers.get(0)].setOffset(0, mTargetOffset, mRelativeViewNumber);

746	mViews[_yViewNumbers.get(1)].setOffset(0, mTargetOffset, mRelativeViewNumber);

747	mViews[_yViewNumbers.get(2)].setOffset(0, mTargetOffset, mRelativeViewNumber);

748

}

749

}

750

751

}

752

753	// Set relative view number for animation

754	mRelativeViewNumber = relativeViewNumber;

755

}

756

757	// Note: In this implementation the targetOffset will always be zero

758	// as we are centering the view; but we include the calculations of

759	// targetOffset and targetDistance for use in future implementations

760	if (MoveStyle == MOVE_LEFT_RIGHT) {

761	mInitialOffset = mViews[mRelativeViewNumber].getCurrentOffset()[0];

762	} else if (MoveStyle == MOVE_UP_DOWN) {

763	mInitialOffset = mViews[mRelativeViewNumber].getCurrentOffset()[1];

764

}

765	mTargetOffset = getViewOffset(mRelativeViewNumber, mRelativeViewNumber);

766	mTargetDistance = mTargetOffset - mInitialOffset;

767

768	// Configure base animation properties

769	this.setDuration(mAnimationDuration);

770	this.setInterpolator(mDecelerateInterpolater);

771

772	// Start/continued animation

773	mIsAnimationInProgres = true;

774

}

775

776

@Override

777	protected void applyTransformation(float interpolatedTime, Transformation transformation) {

778	// Ensure interpolatedTime does not over-shoot then calculate new

779

// offset

780	interpolatedTime = (interpolatedTime > 1.0f) ? 1.0f : interpolatedTime;

781	int offset = mInitialOffset + (int) (mTargetDistance * interpolatedTime);

782

783	for (int viewNumber = 0; viewNumber < 5; viewNumber++) {

784	// Only need to animate the visible views as the other view will

785	// always be off-screen

786

787	if (MoveStyle == MOVE_LEFT_RIGHT) {

788	if ((mTargetDistance > 0 && viewNumber != getNextViewNumber_RL(mRelativeViewNumber))

789	\|\| (mTargetDistance < 0 && viewNumber != getPrevViewNumber_RL(mRelativeViewNumber))) {

790	mViews[viewNumber].setOffset(offset, 0, mRelativeViewNumber);

791

}

792	} else if (MoveStyle == MOVE_UP_DOWN ) {

793	if ((mTargetDistance > 0 && viewNumber != getNextViewNumber_UD(mRelativeViewNumber))

794	\|\| (mTargetDistance < 0 && viewNumber != getPrevViewNumber_UD(mRelativeViewNumber))) {

795	mViews[viewNumber].setOffset(0, offset, mRelativeViewNumber);

796

}

797

}

798

}

799

}

800

801

@Override

802	public boolean getTransformation(long currentTime, Transformation outTransformation) {

803	if (super.getTransformation(currentTime, outTransformation) == false) {

804	// Perform final adjustment to offsets to cleanup animation

805	Log.v("mTargetOffset", "mTargetOffset: " + mTargetOffset);

806	if (MoveStyle == MOVE_LEFT_RIGHT) {

807

808	mViews[_xViewNumbers.get(0)].setOffset(mTargetOffset, 0, mRelativeViewNumber);

809	mViews[_xViewNumbers.get(1)].setOffset(mTargetOffset, 0, mRelativeViewNumber);

810	mViews[_xViewNumbers.get(2)].setOffset(mTargetOffset, 0, mRelativeViewNumber);

811

812	} else if (MoveStyle == MOVE_UP_DOWN) {

813	mViews[_yViewNumbers.get(0)].setOffset(0, mTargetOffset, mRelativeViewNumber);

814	mViews[_yViewNumbers.get(1)].setOffset(0, mTargetOffset, mRelativeViewNumber);

815	mViews[_yViewNumbers.get(2)].setOffset(0, mTargetOffset, mRelativeViewNumber);

816

}

817	// Reached the animation target

818	mIsAnimationInProgres = false;

819

820	return false;

821

}

822

823	// Cancel if the screen touched

824	if (mIsTouched \|\| mIsDragging) {

825	// Note that at this point we still consider ourselves to be

826	// animating

827	// because we have not yet reached the target offset; its just

828	// that the

829	// user has temporarily interrupted the animation with a touch

830	// gesture

831

832	return false;

833

}

834

835	return true;

836

}

837

}

838

839	float mLastMotionX = 0;

840	float mLastMotionY = 0;

841

842	// int firstx = 0;

843	private class FlingGestureDetector extends GestureDetector.SimpleOnGestureListener {

844

@Override

845	public boolean onDown(MotionEvent e) {

846	// firstx = (int) e.getX();

847	// Stop animation

848	//mIsTouched = true;

849	// Reset fling state

850	mFlingDirection = 0;

851	return true;

852

}

853

854

@Override

855	public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {

856	// int scrollOffset = 0;

857	if (e2.getAction() == MotionEvent.ACTION_MOVE) {

858

859	if (mIsDragging == false) {

860	// Stop animation

861	mIsTouched = true;

862	// Reconfigure scroll

863	mIsDragging = true;

864	mFlingDirection = 0;

865	mScrollTimestamp = System.currentTimeMillis();

866	mCurrentOffset = mViews[mCurrentViewNumber].getCurrentOffset();

867

}

868

869	float maxVelocity = mGalleryWidth / (mAnimationDuration / 1000.0f);

870	long timestampDelta = System.currentTimeMillis() - mScrollTimestamp;

871

872	if (MoveStyle == MOVE_LEFT_RIGHT) {

873	float maxScrollDelta = maxVelocity * (timestampDelta / 1000.0f);

874	float currentScrollDelta = e1.getRawX() - e2.getRawX();

875

876	if (currentScrollDelta < maxScrollDelta * -1)

877	currentScrollDelta = maxScrollDelta * -1;

878	if (currentScrollDelta > maxScrollDelta)

879	currentScrollDelta = maxScrollDelta;

880	int scrollOffset = Math.round(mCurrentOffset[0] + currentScrollDelta);

881

882	// We can't scroll more than the width of our own

883	// framelayout

884	if (scrollOffset >= mGalleryWidth)

885	scrollOffset = mGalleryWidth;

886	if (scrollOffset <= mGalleryWidth * -1)

887	scrollOffset = mGalleryWidth * -1;

888	mViews[_xViewNumbers.get(0)].setOffset(scrollOffset, 0, mCurrentViewNumber);

889	mViews[_xViewNumbers.get(1)].setOffset(scrollOffset, 0, mCurrentViewNumber);

890	mViews[_xViewNumbers.get(2)].setOffset(scrollOffset, 0, mCurrentViewNumber);

891	// h_viewnumber=mCurrentViewNumber;

892

}

893

894	if (MoveStyle == MOVE_UP_DOWN) {

895

896	float maxVelocity_Y = mGalleryHeight / (mAnimationDuration / 1000.0f);

897	float maxScrollDelta_Y = maxVelocity_Y * (timestampDelta / 1000.0f);

898	float currentScrollDelta_Y = e1.getRawY() - e2.getRawY();

899	if (currentScrollDelta_Y < maxScrollDelta_Y * -1)

900	currentScrollDelta_Y = maxScrollDelta_Y * -1;

901	if (currentScrollDelta_Y > maxScrollDelta_Y)

902	currentScrollDelta_Y = maxScrollDelta_Y;

903	int scrollOffset_Y = Math.round(mCurrentOffset[1] + currentScrollDelta_Y);

904	if (scrollOffset_Y >= mGalleryHeight)

905	scrollOffset_Y = mGalleryHeight;

906	if (scrollOffset_Y <= mGalleryHeight * -1)

907	scrollOffset_Y = mGalleryHeight * -1;

908	mViews[_yViewNumbers.get(0)].setOffset(0, scrollOffset_Y, mCurrentViewNumber);

909	mViews[_yViewNumbers.get(1)].setOffset(0, scrollOffset_Y, mCurrentViewNumber);

910	mViews[_yViewNumbers.get(2)].setOffset(0, scrollOffset_Y, mCurrentViewNumber);

911

}

912

}

913	return false;

914

}

915

916

@Override

917	public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {

918	if (Math.abs(e1.getY() - e2.getY()) <= swipe_max_off_path) {

919	if (e2.getX() - e1.getX() > swipe_min_distance && Math.abs(velocityX) > swipe_threshold_veloicty) {

920	// movePrevious_RL();

921

}

922	if (e1.getX() - e2.getX() > swipe_min_distance && Math.abs(velocityX) > swipe_threshold_veloicty) {

923	// moveNext_RL();

924

}

925	if (e2.getY() - e1.getY() > swipe_min_distance && Math.abs(velocityY) > swipe_threshold_veloicty) {

926	// movePrevious_UD();

927

}

928	if (e1.getY() - e2.getY() > swipe_min_distance && Math.abs(velocityY) > swipe_threshold_veloicty) {

929	// moveNext_UD();

930

}

931

932

}

933

934	return false;

935

}

936

937

@Override

938	public void onLongPress(MotionEvent e) {

939	// Finalise scrolling

940	mFlingDirection = 0;

941	processGesture();

942

}

943

944

@Override

945	public void onShowPress(MotionEvent e) {

946

}

947

948

@Override

949	public boolean onSingleTapUp(MotionEvent e) {

950	// Reset fling state

951	return false;

952

}

953

}

954

955

}

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