利用ViewFlipper和手势实现软件透明导航-优快云博客

package com.nd.activitydemo; import android.app.Activity; import android.os.Bundle; import android.util.Log; import android.view.GestureDetector; import android.view.MotionEvent; import android.view.View; import android.view.GestureDetector.OnGestureListener; import android.view.View.OnClickListener; import android.view.ViewGroup.LayoutParams; import android.view.animation.AnimationUtils; import android.widget.ImageView; import android.widget.ViewFlipper; public class ActivityDemoActivity extends Activity implements OnGestureListener { /** Called when the activity is first created. */ GestureDetector mGestureDetector; // private static final int SCROLL_MIN_DISTANCE = 160; // private static final int SCROLL_MIN_VELOCITY = 10; private ViewFlipper vf; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setTheme(R.style.Transparent); setContentView(R.layout.transparent); vf = (ViewFlipper) findViewById(R.id.vf); vf.addView(addImageById(R.drawable.guardpic1), new LayoutParams( LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT)); vf.addView(addImageById(R.drawable.guardpic2), new LayoutParams( LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT)); mGestureDetector = new GestureDetector(ActivityDemoActivity.this); } // 开发时对手势的测试 @Override public boolean onTouchEvent(MotionEvent event) { // TODO Auto-generated method stub boolean retValue = mGestureDetector.onTouchEvent(event); int action = event.getAction(); if (action == MotionEvent.ACTION_UP) { // Helper method for lifted finger } else if (action == MotionEvent.ACTION_CANCEL) { } return retValue; } @Override public boolean onDown(MotionEvent e) { // TODO Auto-generated method stub return false; } @Override public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) { // TODO Auto-generated method stub Log.i("Fling", "Fling Happened!"); if (e1.getX() - e2.getX() > 120) { this.vf.setInAnimation(AnimationUtils.loadAnimation(this, R.anim.push_left_in)); this.vf.setOutAnimation(AnimationUtils.loadAnimation(this, R.anim.push_left_out)); this.vf.showNext(); return true; } else if (e1.getX() - e2.getX() < -120) { this.vf.setInAnimation(AnimationUtils.loadAnimation(this, R.anim.push_right_in)); this.vf.setOutAnimation(AnimationUtils.loadAnimation(this, R.anim.push_right_out)); this.vf.showPrevious(); return true; } return true; } @Override public void onLongPress(MotionEvent e) { // TODO Auto-generated method stub } @Override public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) { // TODO Auto-generated method stub Log.i("MotionEvent", "onScroll........."); // 参数解释： // e1：第1个ACTION_DOWN MotionEvent // e2：最后一个ACTION_MOVE MotionEvent // velocityX：X轴上的移动速度，像素/秒 // velocityY：Y轴上的移动速度，像素/秒 // 触发条件： // X轴的坐标位移大于SCROLL_MIN_DISTANCE，且移动速度大于SCROLL_MIN_VELOCITY个像素/秒 // if (e1.getX() - e2.getX() > SCROLL_MIN_DISTANCE // && Math.abs(distanceX) > SCROLL_MIN_VELOCITY) { // // Fling left // iv.setBackgroundResource(R.drawable.guardpic2); // } else if (e2.getX() - e1.getX() > SCROLL_MIN_DISTANCE // && Math.abs(distanceX) > SCROLL_MIN_VELOCITY) { // // Fling right // iv.setBackgroundResource(R.drawable.detailpageguideinfo); // } return false; } @Override public void onShowPress(MotionEvent e) { // TODO Auto-generated method stub } @Override public boolean onSingleTapUp(MotionEvent e) { // TODO Auto-generated method stub ActivityDemoActivity.this.finish(); return false; } public View addImageById(int id) { ImageView iv = new ImageView(this); iv.setImageResource(id); return iv; } }

布局文件：

<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" > <ViewFlipper android:id="@+id/vf" android:layout_width="fill_parent" android:layout_height="fill_parent" /> </LinearLayout>

参考资料：

ViewFlipper Animation 使用 http://www.iteye.com/topic/569493