使用WindowManager.addView()模拟直播软件悬浮窗口播放视频

package cn.test.videowindows;

import android.content.ContentResolver;
import android.database.Cursor;
import android.graphics.PixelFormat;
import android.os.Bundle;
import android.os.Handler;
import android.provider.MediaStore;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.Gravity;
import android.view.MotionEvent;
import android.view.View;
import android.view.WindowManager;
import android.widget.ImageView;
import android.widget.RelativeLayout;
import android.widget.VideoView;

/**
* 胡邦邦邦茂 ——WindowManager.addView()实现悬浮窗口播放视频
*/
public class MainActivity extends AppCompatActivity {
private WindowManager mWindowManager;
private WindowManager.LayoutParams mLayout;
//界面VideoView     悬浮窗口VideoView
VideoView mVV, mVVWindows;
RelativeLayout mRelative;
// 窗口宽高值
float x, y;
//悬浮窗口布局
View mWindowsView;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initView();
}

private void initView() {
mRelative = (RelativeLayout) findViewById(R.id.relative);
mVV = (VideoView) findViewById(R.id.videoView);
playVideo(mVV);
}

//播放视频
private void playVideo(VideoView vv) {
ContentResolver resolver = getContentResolver();
Cursor c = resolver.query(MediaStore.Video.Media.EXTERNAL_CONTENT_URI, null, null, null, null);
if (c.moveToNext()) {

String path = c.getString(c.getColumnIndex(MediaStore.Video.Media.DATA));
vv.setVideoPath(path);
vv.requestFocus();
vv.start();
}
}

public void showWindow(View vv) {
mRelative.setVisibility(View.GONE);
// 取得系统窗体
mWindowManager = (WindowManager) getApplicationContext()
.getSystemService("window");
// 窗体的布局样式
mLayout = new WindowManager.LayoutParams();
// 设置窗体显示类型——TYPE_SYSTEM_ALERT(系统提示)
mLayout.type = WindowManager.LayoutParams.TYPE_SYSTEM_ALERT;
// 设置窗体焦点及触摸：
// FLAG_NOT_FOCUSABLE(不能获得按键输入焦点)
mLayout.flags = WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE;
// 设置显示的模式
mLayout.format = PixelFormat.RGBA_8888;
// 设置对齐的方法
mLayout.gravity = Gravity.TOP | Gravity.LEFT;
// 设置窗体宽度和高度
mLayout.width = WindowManager.LayoutParams.WRAP_CONTENT;
mLayout.height = WindowManager.LayoutParams.WRAP_CONTENT;
//将指定View解析后添加到窗口管理器里面
mWindowsView = View.inflate(this, R.layout.windows_layout, null);
mVVWindows = (VideoView) mWindowsView.findViewById(R.id.videoView);
playVideo(mVVWindows);
mWindowManager.addView(mWindowsView, mLayout);

mWindowsView.setOnTouchListener(new View.OnTouchListener() {
float mTouchStartX;
float mTouchStartY;

@Override
public boolean onTouch(View view, MotionEvent event) {
x = event.getRawX();
y = event.getRawY() - 25;//25状态栏大小
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
mTouchStartX = event.getX();
mTouchStartY = event.getY();
break;
case MotionEvent.ACTION_MOVE:
//原始坐标减去移动坐标
mLayout.x = (int) (x - mTouchStartX);
mLayout.y = (int) (y - mTouchStartY);
mWindowManager.updateViewLayout(mWindowsView, mLayout);
Log.i("main", "x值=" + x + "\ny值=" + y + "\nmTouchX" + mTouchStartX + "\nmTouchY=" + mTouchStartY);
break;
}
return true;
}
});
}

//关闭窗口点击事件
public void ivDelete(View view) {
mWindowManager.removeView(mWindowsView);
mRelative.setVisibility(View.VISIBLE);
}

}