1_自定義VideoView,增加設定視訊大小方法

public class VideoView extends android.widget.VideoView {    /**

• Android系統在更加xml佈局找這個類，並且例項化的時候，用該構造方法例項化

• @param context

• @param attrs/    public VideoView(Context context, AttributeSet attrs) {        super(context, attrs);    }

    public VideoView(Context context) {        super(context);

    @Override    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {//        super.onMeasure(widthMeasureSpec, heightMeasureSpec);        setMeasuredDimension(widthMeasureSpec, heightMeasureSpec);    }

    /**

• 設定視訊畫面的寬和高

• @param videoWidth

• @param videoHeight/    public void setVideoSize(int videoWidth, int videoHeight) {

          ViewGroup.LayoutParams layoutParams  =getLayoutParams();        layoutParams.width = videoWidth;        layoutParams.height = videoHeight;        setLayoutParams(layoutParams);    }

}

2_在播放器中得到螢幕高和寬方法

//方式一

wm = (WindowManager) getSystemService(WINDOW_SERVICE);screenWidth = wm.getDefaultDisplay().getWidth();

//方式二

DisplayMetrics displayMetrics = new DisplayMetrics();this.getWindowManager().getDefaultDisplay().getMetrics(displayMetrics);screenWidth = displayMetrics.widthPixels;screenHeight = displayMetrics.heightPixels;

3_視訊預設和全屏

一播放起來，在準備好了中設定視訊播放預設

/**

• true全屏

• flase預設*/  private boolean isFullScreen = false;  /**

• 視訊全屏和預設

• @param type*/  public void setVideoType(int type){    switch (type) {        case SCREEN_FULL:            videoview.setVideoSize(screenWidth, screenHeight);            isFullScreen = true;            btn_switch_screen.setBackgroundResource(R.drawable.btn_screen_dafult_selector);            break;

        case SCREEN_DEFULT:            //視訊的寬            int mVideoWidth = videoWidth;            //視訊的高            int mVideoHeight = videoHeight;            //螢幕的寬            int width = screenWidth;            //螢幕的寬            int height = screenHeight;            if (mVideoWidth > 0 && mVideoHeight > 0) {                if ( mVideoWidth * height  > width * mVideoHeight ) {                    //Log.i("@@@", "image too tall, correcting");                    height = width * mVideoHeight / mVideoWidth;                } else if ( mVideoWidth * height  < width * mVideoHeight ) {                    //Log.i("@@@", "image too wide, correcting");                    width = height * mVideoWidth / mVideoHeight;                } else {                    //Log.i("@@@", "aspect ratio is correct: " +                    //width+"/"+height+"="+                    //mVideoWidth+"/"+mVideoHeight);                }            }

            videoview.setVideoSize(width, height);            btn_switch_screen.setBackgroundResource(R.drawable.btn_screen_full_selector);            isFullScreen = false;

            break;    }

}

4_點選按鈕的時候實現切換播放模式 case R.id.btn_switch_screen:  if(isFullScreen){     setVideoType(SCREEN_DEFUALT);  }else{     setVideoType(SCREEN_FULL);  }  break

5 手勢識別器實現雙擊縮放螢幕

detector = new GestureDetector(this, new GestureDetector.SimpleOnGestureListener()
{
    /**
     * 長按
     * @param e
     */
    @Override
    public void onLongPress(MotionEvent e)
    {
        super.onLongPress(e);

    }
​
    /**
     * 雙擊
     * @param e
     * @return
     */
    @Override
    public boolean onDoubleTap(MotionEvent e)
    {
        //                Toast.makeText(SystemVideoPlayer.this, "我被雙擊了", Toast
        // .LENGTH_SHORT).show();
          if (isFullScreen)
        {
            //設定為預設
            setVideoType(DEFAULT_SCREEN);
        }
        else
        {
            //設定為全屏
            setVideoType(FULL_SCREEN);
        }
        return super.onDoubleTap(e);
    }
​
    /**
     * 單擊
     * @param e
     * @return
     */
    @Override
    public boolean onSingleTapConfirmed(MotionEvent e)
    {
        //                Toast.makeText(SystemVideoPlayer.this, "我被單擊了", Toast
        // .LENGTH_SHORT).show();
​
​

        return super.onSingleTapConfirmed(e);
    }
});