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）
一，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);
}
}