android 动态加载 Android中利用动态加载实现手机淘宝的节日特效

package com.kot32.christmasview.player;
import android.content.Context;
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.util.AttributeSet;
import android.view.View;
import android.widget.Toast;
import com.kot32.christmasview.R;
import java.io.IOException;
/**
 * Created by kot32 on 16/12/8.
 */
public class MyPlayer extends View {
 public MediaPlayer mediaPlayer;
 public MyPlayer(Context context) {
  super(context);
  init();
 }
 public MyPlayer(Context context, AttributeSet attrs) {
  super(context, attrs);
  init();
 }
 private void init() {
  setBackgroundResource(R.drawable.pig);
  mediaPlayer = new MediaPlayer();
  mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
  playUrl("http://172.20.248.106/IXC5b415fcacfc3c439e25a3e74533d2239/TomaToDo/bgms/my_hbx.mp3");
  Toast.makeText(getContext(), "开始播放", Toast.LENGTH_SHORT).show();
  setOnClickListener(new OnClickListener() {
   @Override
   public void onClick(View v) {
    if (!mediaPlayer.isPlaying()) {
     mediaPlayer.start();
     Toast.makeText(getContext(), "继续播放", Toast.LENGTH_SHORT).show();
    } else {
     mediaPlayer.pause();
     Toast.makeText(getContext(), "暂停播放", Toast.LENGTH_SHORT).show();
    }
   }
  });
 }
 public void playUrl(String videoUrl) {
  try {
   mediaPlayer.reset();
   mediaPlayer.setDataSource(videoUrl);
   mediaPlayer.prepare();//prepare之后自动播放
   mediaPlayer.start();
  } catch (IllegalArgumentException e) {
   e.printStackTrace();
  } catch (IllegalStateException e) {
   e.printStackTrace();
  } catch (IOException e) {
   e.printStackTrace();
  }
 }
 @Override
 protected void onDetachedFromWindow() {
  super.onDetachedFromWindow();
  try {
   mediaPlayer.stop();
   mediaPlayer.release();
  }catch (Exception e){
   e.printStackTrace();
  }
 }
}

private void initResource() {
  Resources resources = getContext().getResources();
  try {
   AssetManager newManager = AssetManager.class.newInstance();
   Method addAssetPath = newManager.getClass().getMethod("addAssetPath", String.class);
   addAssetPath.invoke(newManager, DynamicViewManager.getInstance().getUpdateFileFullPath());
   Resources newResources = new Resources(newManager,
     resources.getDisplayMetrics(), resources.getConfiguration());
   Reflect.onObject(getContext()).set("mResources", newResources);
  } catch (Exception e) {
   e.printStackTrace();
  }
 }

DexClassLoader classLoader = new DexClassLoader(apkFile.getAbsolutePath()
     , "dex_out_put_dir"
     , null
     , getClass().getClassLoader());
Class newViewClazz = classLoader.loadClass("view's package name");
Constructor con = newViewClazz.getConstructor(Context.class);
//first use Activity's Resource lie to View
if (dynamicView == null) {
 dynamicView = (View) con.newInstance(getContext());
}
//Replace the View's mResources and recovery the Activity's avoid disorder of Resources
Reflect.onObject(getContext()).set("mResources", null);
getContext().getResources();
RelativeLayout.LayoutParams layoutParams = new RelativeLayout.LayoutParams(DisplayUtil.dip2px(getContext(), viewInfo.layoutParams.width),
   DisplayUtil.dip2px(getContext(), viewInfo.layoutParams.height));
layoutParams.addRule(RelativeLayout.CENTER_IN_PARENT, RelativeLayout.TRUE);
addView(dynamicView, layoutParams);

<RelativeLayout
 xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:app="http://schemas.android.com/apk/res-auto"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:background="@drawable/tb_bg"
 >
 <com.kot32.dynamicloadviewlibrary.core.DynamicViewGroup
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  app:uuid="activity_frame">
  <TextView
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:text="原始页面"
   />
 </com.kot32.dynamicloadviewlibrary.core.DynamicViewGroup>
 <com.kot32.dynamicloadviewlibrary.core.DynamicViewGroup
  android:layout_width="60dp"
  android:layout_height="60dp"
  android:layout_alignParentRight="true"
  android:layout_centerVertical="true"
  app:uuid="activity_player">
 </com.kot32.dynamicloadviewlibrary.core.DynamicViewGroup>
</RelativeLayout>

{
 "version": 54,
 "downLoadPath": "http://obfgb7oet.bkt.clouddn.com/patch106.apk",
 "fileName": "patch106.apk",
 "viewInfo": [
 {
  "packageName": "com.kot32.testdynamicviewproject.snow.widgets.SnowingView",
  "uuid": "activity_frame",
  "layoutParams": {
  "width": -1,
  "height": -1
  }
 },
 {
  "packageName": "com.kot32.testdynamicviewproject.player.MyPlayer",
  "uuid": "activity_player",
  "layoutParams": {
  "width": -1,
  "height": -1
  }
 }
 ]
}