[移动开发]android视频播放总结

android视频播放总结

全屏原理

操作系统的横竖屏变化，但不让他从新加载页面

活动注册要这么写

 <activity
            android:name=".CourseDetailVideo.CourseDetailVideoActivity"
            android:configChanges="orientation|screenSize|smallestScreenSize|keyboard|keyboardHidden|navigation"
            android:launchMode="singleTop"
            android:windowSoftInputMode="stateAlwaysHidden"></activity>

主函数先获取屏幕长宽高

screenHeight=getWindowManager().getDefaultDisplay().getHeight();
screenWidth=getWindowManager().getDefaultDisplay().getWidth();

全屏前要先滑动到最上面

nestedScrollView.fullScroll(NestedScrollView.FOCUS_UP);

全屏的具体切换

private final int flagsFullScreen = WindowManager.LayoutParams.FLAG_FULLSCREEN;
    private void goFullScreen(){
    	nestedScrollView.fullScroll(NestedScrollView.FOCUS_UP);
        getWindow().addFlags(flagsFullScreen);
        setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
        frameLayoutControl.setBackgroundColor(Color.BLACK);
        frameLayoutVideo.setLayoutParams(new
                LinearLayout.LayoutParams(screenHeight,screenWidth));
        defaultTimeBar.setLayoutParams(new
                LinearLayout.LayoutParams(getPixelsFromDp(timeLenFull),-1));
        frameLayoutBottom.setVisibility(View.INVISIBLE);
        linearLayoutIntroduce.setVisibility(View.INVISIBLE);
        imageButtonBack.setOnClickListener(goNormalListener);
        imageButtonFullScreen.setVisibility(View.INVISIBLE);
        textViewSpeed.setVisibility(View.VISIBLE);
        isFullScreen=true;
    }
    private void goNormal(){
        WindowManager.LayoutParams attrs = getWindow().getAttributes();
        attrs.flags &= (~flagsFullScreen);
        getWindow().setAttributes(attrs);
        getWindow().clearFlags(WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS);
        setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
        frameLayoutControl.setBackgroundColor(Color.TRANSPARENT);
        frameLayoutVideo.setLayoutParams(new LinearLayout.LayoutParams
                (screenWidth,getPixelsFromDp(videoHeight)));
        defaultTimeBar.setLayoutParams(new
                LinearLayout.LayoutParams(getPixelsFromDp(timeLen),-1));
        frameLayoutBottom.setVisibility(View.VISIBLE);
        linearLayoutIntroduce.setVisibility(View.VISIBLE);
        imageButtonBack.setOnClickListener(backListener);
        imageButtonFullScreen.setVisibility(View.VISIBLE);
        textViewSpeed.setVisibility(View.INVISIBLE);
        isFullScreen=false;
    }

注意在全屏的时候别忘了改变其他组件的属性

生成exoplayer

dataSourceFactory = new DefaultDataSourceFactory(context,
                Util.getUserAgent(context,"CourseDetailVideoExoPlayer"));
MediaSource mediaSource = new ProgressiveMediaSource.Factory(dataSourceFactory)
                .createMediaSource(Uri.parse(url));
player=new SimpleExoPlayer.Builder(context).build();
player.setPlayWhenReady(true);
player.prepare(mediaSource);
playerView.setPlayer(player);                

exoplayer在生命周期函数中的变化

@Override
    protected void onDestroy() {
        super.onDestroy();
        if(player!=null){
            player.release();
        }
    }

    @Override
    protected void onPause() {
        super.onPause();
        if(player!=null){
            player.setPlayWhenReady(false);
        }

exoplayer切换播放时要先release

if(player!=null){
            player.release();
            player=null;
        }

exoplayer改变倍速

PlaybackParameters playbackParameters=new PlaybackParameters(1f,1f);
                    if(player!=null)player.setPlaybackParameters(playbackParameters);