Android版本更新

最新推荐文章于 2021-05-26 05:45:11 发布

原创最新推荐文章于 2021-05-26 05:45:11 发布 · 329 阅读

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========================MainActivity对应的布局======================

=====================MainActivity======================

package com.example.day15_lunbo;

import java.util.ArrayList;
import java.util.List;

import android.app.ActionBar.LayoutParams;
import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.support.v4.view.ViewPager;
import android.support.v4.view.ViewPager.OnPageChangeListener;
import android.widget.ImageView;
import android.widget.LinearLayout;

import com.example.adapter.MyPagerAdapter;

public class MainActivity extends Activity {

private ViewPager vp;
private LinearLayout lin;
private int[] msg;
private List<ImageView> msgList;
private List<ImageView> ivlist;

Handler handler = new Handler() {
public void handleMessage(android.os.Message msg) {
sendMSg();
};
};

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// 查找控件
vp = (ViewPager) findViewById(R.id.vp);
lin = (LinearLayout) findViewById(R.id.lin);
// 图片数据
init();
// 初始化小圆点
initDot();
// 轮播
sendMSg();
// 添加适配器
vp.setAdapter(new MyPagerAdapter(MainActivity.this, msgList));
// 监听vp的滑动事件
vp.setOnPageChangeListener(new OnPageChangeListener() {

@Override
public void onPageSelected(int arg0) {
// 遍历小点的集合
for (int i = 0; i < ivlist.size(); i++) {
// 如果当前的索引值和i相等
if (arg0 % ivlist.size() == i) {
// 设置为亮色
ivlist.get(i).setImageResource(R.drawable.dots_focus);
} else {
// 否则为暗色
ivlist.get(i).setImageResource(R.drawable.dots_normal);
}
}
}

@Override
public void onPageScrolled(int arg0, float arg1, int arg2) {
// TODO Auto-generated method stub

}

@Override
public void onPageScrollStateChanged(int arg0) {
// TODO Auto-generated method stub

}
});
}

private void sendMSg() {
int currentItem = vp.getCurrentItem();

currentItem++;

vp.setCurrentItem(currentItem);
// 延时消息
handler.sendEmptyMessageDelayed(0, 3000);
}

private void initDot() {
ivlist = new ArrayList<ImageView>();
ivlist.clear();

for (int i = 0; i < msg.length; i++) {
ImageView iv = new ImageView(this);

if (i == 0) {
// 第一张图片，默认给亮的小点
iv.setImageResource(R.drawable.dots_focus);
} else {
iv.setImageResource(R.drawable.dots_normal);
}
// 设置圆点的宽高
LayoutParams params = new LayoutParams(30, 30);
// 圆点间距、
params.setMargins(5, 0, 5, 0);

lin.addView(iv, params);

ivlist.add(iv);

}
}

private void init() {
msg = new int[] { R.drawable.aa, R.drawable.aiqin, R.drawable.b,
R.drawable.bb };

msgList = new ArrayList<ImageView>();

for (int i = 0; i < msg.length; i++) {
ImageView iv = new ImageView(MainActivity.this);

iv.setImageResource(msg[i]);
msgList.add(iv);
}
}

}

==================Update Bean包==============

package com.example.updataapp.bean;

public class Updata {

private String versionCode;

private String downloadUrl;

public String getVersionCode() {
return versionCode;
}

public void setVersionCode(String versionCode) {
this.versionCode = versionCode;
}

public String getDownloadUrl() {
return downloadUrl;
}

public void setDownloadUrl(String downloadUrl) {
this.downloadUrl = downloadUrl;
}

public Updata(String versionCode, String downloadUrl) {
super();
this.versionCode = versionCode;
this.downloadUrl = downloadUrl;
}

public Updata() {
super();
// TODO Auto-generated constructor stub
}

@Override
public String toString() {
return "Updata [versionCode=" + versionCode + ", downloadUrl="
+ downloadUrl + "]";
}

}

=====================另外一个类aMyAdapter==============

package com.example.adapter;

import java.util.List;

import android.content.Context;
import android.os.Handler;
import android.support.v4.view.PagerAdapter;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;
import android.view.ViewGroup;
import android.widget.ImageView;

public class MyAdapter extends PagerAdapter {

Context context;
List<ImageView> list;
private Handler handler;

public MyAdapter(Context context, List<ImageView> list, Handler handler) {
super();
this.context = context;
this.list = list;
this.handler = handler;
}
@Override
public int getCount() {
// TODO Auto-generated method stub
return Integer.MAX_VALUE;
}
@Override
public boolean isViewFromObject(View arg0, Object arg1) {
// TODO Auto-generated method stub
return arg0 == arg1;
}
@Override
public void destroyItem(ViewGroup container, int position, Object object) {
ImageView view = list.get(position%list.size());
container.removeView(view);

}
@Override
public Object instantiateItem(ViewGroup container, int position) {
//通过控件集合获取imageView，添加到容器中，并作为key 返回
ImageView view = list.get(position%list.size());

view.setOnTouchListener(new OnTouchListener() {

@Override
public boolean onTouch(View v, MotionEvent event) {
switch (event.getAction()) {
//当按下的时候，停止轮播
case MotionEvent.ACTION_DOWN:
//移除所有的回调和消息
handler.removeCallbacksAndMessages(null);
break;
//抬起
case MotionEvent.ACTION_UP:
//取消的时候继续开始录播
handler.sendEmptyMessageDelayed(0, 2000);
break;
//取消的时候，继续轮播
case MotionEvent.ACTION_CANCEL:
handler.sendEmptyMessageDelayed(0, 2000);
break;

default:
break;
}
//false 触摸事件不被消费，true 消费该触摸事件
return true;
}
});

container.addView(view);
return view;
}

}