两个surfaceView实现切换效果

需求：视频通话界面，两个surfaceView一个显示本端的视图，另一个显示对端的视图，由于显示比例的问题总会存在一个覆盖另一个的问题，为保证用户体验，规定小的覆盖大的视图上面，且点击小的视图可切花为大图视图居中，达到两个视图切花的功能。简单写一个demo完成功能的测试需求，为了较少文章的篇幅，视图的内容用回执矩形代替（实际开发中显示的是本地照相采集的数据和对端经过opgl处理的数据）

简单的布局

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:tools="http://schemas.android.com/tools"
 android:layout_width="match_parent"
 android:layout_height="match_parent" >

 <RelativeLayout
 android:id="@+id/remote_rl"
 android:layout_width="fill_parent"
 android:layout_height="wrap_content"

  >

 <SurfaceView
  android:id="@+id/remote_view"
  android:layout_width="match_parent"
  android:layout_height="match_parent"

</RelativeLayout> android:layout_gravity="center" />

 </RelativeLayout>

 <RelativeLayout
 android:id="@+id/local_rl"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"

 >

 <SurfaceView
  android:id="@+id/local_view"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content" />
</RelativeLayout>

具体的demo实现

public class MainActivity extends Activity implements View.OnClickListener {
 public static final String TAG = "sssss";
 //远端的视图
 private SurfaceView remote_sv;
 // 本地的视图
 private SurfaceView local_sv;
 private SurfaceHolder remote_holder;
 private SurfaceHolder local_holder;
 private RelativeLayout remote_rl;
 private RelativeLayout local_rl;

 private int screenWidth;
 private int screenHeight;

 private int beforRemoteweith;
 private int beforLocalweith;
 private int beforRemoteheigth;
 private int beforLocalheigth;
 private int StateAB = 0;
 private int StateBA = 1;
 private int mSate;
 private int defaultLocalHeight=200;
 private int defaultLocalwidth=400;

 @Override
 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_main);
 DisplayMetrics dm = getResources().getDisplayMetrics();
 screenWidth = dm.widthPixels;
 screenHeight = dm.heightPixels - 500;
 remote_sv = (SurfaceView) findViewById(R.id.remote_view);
 remote_rl = (RelativeLayout) findViewById(R.id.remote_rl);
 local_rl = (RelativeLayout) findViewById(R.id.local_rl);
 remote_sv.setOnClickListener(this);

 LayoutParams params = new LayoutParams(screenWidth, screenHeight);
 remote_sv.setLayoutParams(params);
 remote_holder = remote_sv.getHolder();
 // 对 surfaceView 进行操作
 remote_holder.addCallback(new SurfaceHolder.Callback() {
  @Override
  public void surfaceCreated(SurfaceHolder holder) {
  Canvas c = remote_holder.lockCanvas();
  // 2.开画
  Paint p = new Paint();
  p.setColor(Color.RED);
  Rect aa = new Rect(0, 0, holder.getSurfaceFrame().width(),
   holder.getSurfaceFrame().height());
  c.drawRect(aa, p);
  // 3. 解锁画布 更新提交屏幕显示内容
  remote_holder.unlockCanvasAndPost(c);
  }

  @Override
  public void surfaceChanged(SurfaceHolder holder, int format,
   int width, int height) {
  /**
  *
  Log.d(TAG,"remote_holder surfaceChanged width"+ width+"height"+height);
  Canvas c = remote_holder.lockCanvas();
  // 2.开画
  Paint p = new Paint();
  p.setColor(Color.RED);
  Rect aa = new Rect(0, 0, holder.getSurfaceFrame().width(),
   holder.getSurfaceFrame().height());
  c.drawRect(aa, p);
  // 3. 解锁画布 更新提交屏幕显示内容
  remote_holder.unlockCanvasAndPost(c);
  */}

  @Override
  public void surfaceDestroyed(SurfaceHolder holder) {

  }
 });// 自动运行surfaceCreated以及surfaceChanged

 local_sv = (SurfaceView) findViewById(R.id.local_view);
 local_sv.setOnClickListener(this);
 local_sv.setOnClickListener(this);
 // sv.setZOrderOnTop(false);
 local_sv.setZOrderOnTop(true);
 // 这两个方法差不多，设置了就会浮现到顶部，但是，后面的看不见，要像下面设置为透明
 // local_sv.setZOrderOnTop(true);
 // local_sv.setZOrderMediaOverlay(true);

 local_holder = local_sv.getHolder();

 remote_holder.setFormat(PixelFormat.TRANSPARENT);
 local_holder.setFormat(PixelFormat.TRANSPARENT);
 LayoutParams params1 = new LayoutParams(defaultLocalHeight, defaultLocalwidth);
 local_sv.setLayoutParams(params1);
 remote_holder = remote_sv.getHolder();
 local_holder.addCallback(new SurfaceHolder.Callback() {
  @Override
  public void surfaceCreated(SurfaceHolder holder) {
  Canvas c = holder.lockCanvas();
  // 2.开画
  Paint p = new Paint();
  p.setColor(Color.YELLOW);
  Rect aa = new Rect(0, 0, holder.getSurfaceFrame().width(),
   holder.getSurfaceFrame().height());
  c.drawRect(aa, p);
  // 3. 解锁画布 更新提交屏幕显示内容
  holder.unlockCanvasAndPost(c);
  }

  @Override
  public void surfaceChanged(SurfaceHolder holder, int format,
   int width, int height) {
 /**
  *
  Log.d(TAG,"local_holder surfaceChanged width"+ width+"height"+height);
  Canvas c = holder.lockCanvas();
  // 2.开画
  Paint p = new Paint();
  p.setColor(Color.YELLOW);
  Rect aa = new Rect(0, 0, holder.getSurfaceFrame().width()-50,
   holder.getSurfaceFrame().height()-50);
  c.drawRect(aa, p);
  // 3. 解锁画布 更新提交屏幕显示内容
  holder.unlockCanvasAndPost(c);

  */}

  @Override
  public void surfaceDestroyed(SurfaceHolder holder) {

  }
 });
 zoomOpera(local_rl, local_sv, remote_sv, remote_rl, defaultLocalwidth,
  defaultLocalHeight, RelativeLayout.CENTER_IN_PARENT);
 }

 @Override
 public void onClick(View view) {
 switch (view.getId()) {
 case R.id.local_view:
  Log.d(TAG, " onClick local_view" + mSate);
  if (mSate == StateAB) {
  zoomlocalViewout(beforRemoteweith, beforRemoteheigth, local_sv,
   remote_sv);
  zoomRemoteViewint(beforLocalweith, beforLocalheigth);
  mSate = StateBA;
  }

  break;
 case R.id.remote_view:
  Log.d(TAG, " onClick emote_view" + mSate);
  if (mSate == StateBA) {

  zoomRemoteout(beforRemoteweith, beforRemoteheigth, local_sv,
   remote_sv);
  zoomlocalViewint(beforLocalweith, beforLocalheigth);

  mSate = StateAB;
  }

  break;
 default:
  break;
 }

 }
//放大远端的视图
 private void zoomRemoteout(int weith2, int heigth2, SurfaceView localView,
  SurfaceView remoteView) {

 beforLocalheigth = localView.getMeasuredHeight();
 beforLocalweith = localView.getMeasuredWidth();
 beforRemoteheigth = remoteView.getMeasuredHeight();
 beforRemoteweith = remoteView.getMeasuredWidth();
 Log.d(TAG, "zoomRemoteout beforLocalheigth" + beforLocalheigth
  + "beforLocalweith" + beforLocalweith + "beforRemoteheigth"
  + beforRemoteheigth + "beforRemoteweith" + beforLocalweith);
 zoomOpera(local_rl, local_sv, remote_sv, remote_rl, screenWidth,
  beforLocalheigth, RelativeLayout.CENTER_IN_PARENT);

 }
//具体的视图操作
 private void zoomOpera(View sourcView, SurfaceView beforeview,
  SurfaceView afterview, View detView, int beforLocalweith,
  int beforLocalHeigth, int rule) {

 LayoutParams params1 = new LayoutParams(LayoutParams.MATCH_PARENT,
  LayoutParams.MATCH_PARENT);

 Log.w(TAG, "beforLocalheigth = " + beforLocalheigth
  + "; beforLocalweith = " + beforLocalweith);
 params1.addRule(rule, RelativeLayout.TRUE);
 afterview.setLayoutParams(params1);
 afterview.setBackgroundResource(android.R.color.transparent);
 params1 = new LayoutParams(beforLocalweith, beforLocalHeigth);
 params1.addRule(rule, RelativeLayout.TRUE);
 detView.setLayoutParams(params1);

 }
//缩小远端的视图
 private void zoomRemoteViewint(int weith2, int heigth2) {
 RelativeLayout paretview = (RelativeLayout) local_rl.getParent();
 paretview.removeView(remote_rl);
 paretview.removeView(local_rl);
 zoomOpera(local_rl, local_sv, remote_sv, remote_rl, beforLocalweith,
  beforLocalheigth, RelativeLayout.ALIGN_PARENT_TOP);
 Log.d(TAG, "paretview" + paretview.getChildCount());
 paretview.addView(local_rl);
 paretview.addView(remote_rl);
 remote_sv.setZOrderOnTop(true);

 }
//放大本端的视图
 private void zoomlocalViewout(int weith2, int heigth2,
  SurfaceView localView, SurfaceView remoteView) {
 beforLocalheigth = localView.getMeasuredHeight();
 beforLocalweith = localView.getMeasuredWidth();
 beforRemoteheigth = remoteView.getMeasuredHeight();
 beforRemoteweith = remoteView.getMeasuredWidth();
 Log.d(TAG, "zoomlocalViewout beforLocalheigth" + beforLocalheigth
  + "beforLocalweith" + beforLocalweith + "beforRemoteheigth"
  + beforRemoteheigth + "beforRemoteweith" + beforRemoteweith);
 zoomOpera(remote_rl, remote_sv, local_sv, local_rl, beforRemoteweith,
  beforRemoteheigth, RelativeLayout.CENTER_IN_PARENT);

 }
//减小本端的视图
 private void zoomlocalViewint(int weith2, int heigth2) {
 RelativeLayout paretview = (RelativeLayout) local_rl.getParent();
 paretview.removeView(remote_rl);
 paretview.removeView(local_rl);
 zoomOpera(remote_rl, remote_sv, local_sv, local_rl, beforRemoteweith,
  beforRemoteheigth, RelativeLayout.ALIGN_PARENT_TOP);
 paretview.addView(remote_rl);
 paretview.addView(local_rl);
 local_sv.setZOrderOnTop(true);

 }
}

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