android studio的videoview知识点

Android Studio中的VideoView是一个用于播放视频的视图组件。它可以在应用程序中嵌入视频并控制视频的播放。以下是一些关于Android Studio中VideoView的知识点：

1. 在XML布局文件中添加VideoView组件：

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

2. 在Java代码中设置VideoView的路径和媒体控制器：

VideoView videoView = findViewById(R.id.videoView);
String videoPath = "android.resource://" + getPackageName() + "/" + R.raw.video;
Uri uri = Uri.parse(videoPath);
videoView.setVideoURI(uri);
MediaController mediaController = new MediaController(this);
videoView.setMediaController(mediaController);
mediaController.setAnchorView(videoView);

3. 自定义VideoView：

public class CustomVideoView extends VideoView {
    public CustomVideoView(Context context) {
        super(context);
    }
    public CustomVideoView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }
    public CustomVideoView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
    }
    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        int width = getDefaultSize(0, widthMeasureSpec);
        int height = getDefaultSize(0, heightMeasureSpec);
        setMeasuredDimension(width, height);
    }
}

4. 在XML布局文件中使用自定义VideoView：

<com.example.CustomVideoView
    android:id="@+id/customVideoView"
    android:layout_width="match_parent"
    android:layout_height="wrap_content" />

5. 在Java代码中使用自定义VideoView：

CustomVideoView customVideoView = findViewById(R.id.customVideoView);
String videoPath = "android.resource://" + getPackageName() + "/" + R.raw.video;
Uri uri = Uri.parse(videoPath);
customVideoView.setVideoURI(uri);
MediaController mediaController = new MediaController(this);
customVideoView.setMediaController(mediaController);
mediaController.setAnchorView(customVideoView);