Android 第二十一章 VideoView_android videoview videoview.getduration() 为-1

继承
java.lang.Object
↳ android.view.View
↳ android.view.SurfaceView
↳ android.widget.VideoView

public class MainActivity extends AppCompatActivity {

    private VideoView mVideoView;

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

    private void initView() {
        mVideoView = findViewById(R.id.videoView);
    }

    private void initData() {


        //播放本地视频
        mVideoView.setVideoURI(Uri.parse("android.resource://" + getPackageName() + "/" + R.raw.video));
        mVideoView.start();

        //网络视频
//        mVideoView.setVideoPath("http://xx.mp4");
//        mVideoView.start();


//        常用方法

//        开始
//        mVideoView.start();
//        暂停
//        mVideoView.pause();
//        重播
//        mVideoView.resume();
//        停止
//        mVideoView.stopPlayback();
//        获取文件长度
//        mVideoView.getDuration();
//        获取当前播放位置
//        mVideoView.getCurrentPosition();
//        判断视频是否播放
//        mVideoView.isPlaying();
//        从第几秒开始播放
//        mVideoView.seekTo();
//        视频播放完回调
        mVideoView.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
            @Override
            public void onCompletion(MediaPlayer mp) {
                Log.d("videoView", "setOnCompletionListener");
                mVideoView.resume();
            }
        });

//        视频播放错误回调
        mVideoView.setOnErrorListener(new MediaPlayer.OnErrorListener() {
            @Override
            public boolean onError(MediaPlayer mp, int what, int extra) {
                Log.d("videoView", "setOnErrorListener");
                return false;
            }
        });
//        播放信息回调
        mVideoView.setOnInfoListener(new MediaPlayer.OnInfoListener() {
            @Override
            public boolean onInfo(MediaPlayer mp, int what, int extra) {
                Log.d("videoView", "setOnInfoListener");
                return false;
            }
        });
        //视频加载完成回调
        mVideoView.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
            @Override
            public void onPrepared(MediaPlayer mp) {
                Log.d("videoView", "setOnPreparedListener");
                mVideoView.seekTo(mVideoView.getDuration() / 2);
            }
        });

    }
}
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<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center"
    android:orientation="vertical"
    tools:context=".MainActivity">


    <VideoView
        android:id="@+id/videoView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />
</LinearLayout>
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