Question

我希望在单击按钮后在thextureView中播放视频，但它不起作用，而我的代码工作，如果我把它放在onCreate方法，如果我不在onCreate中创建它，我是不能播放它？

我希望在单击按钮后在thextureView中播放视频，但它不起作用，而我的代码工作，如果我把它放在onCreate方法，如果我不在onCreate中创建它，我是不能播放它？这是我的代码：

public class TestActivity extends AppCompatActivity {
private TextureView mPreview;
private MediaPlayer mMediaPlayer;
private TextureView.SurfaceTextureListener surfaceTextureListener;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_test);
    mPreview = (TextureView) findViewById(R.id.surfaceView);
    //I COMMENT THIS PART ANDE RUN IT IN onClick BUT ITS NOT WORK :/
    //        surfaceTextureListener=new TextureView.SurfaceTextureListener() {
    //            @Override
    //            public void onSurfaceTextureAvailable(SurfaceTexture surface, int width, int height) {
    //                Surface s = new Surface(surface);
    //                try {
    //                    mMediaPlayer = new MediaPlayer();
    //                    mMediaPlayer.setDataSource("/storage/emulated/0/dff91403790b4f1702f4cda4b83626fa.mp4");
    //                    mMediaPlayer.setSurface(s);
    //                    mMediaPlayer.setLooping(true);
    //                    mMediaPlayer.prepare();
   ...
    //        mPreview.setSurfaceTextureListener(surfaceTextureListener);
    //
}
//EDITED
public void onClick(View v){
    //THIS PART NOT WORK
    surfaceTextureListener=new TextureView.SurfaceTextureListener() {
        @Override
        public void onSurfaceTextureAvailable(SurfaceTexture surface, int width, int height) {
            Surface s = new Surface(surface);
            try {
                mMediaPlayer = new MediaPlayer();
                mMediaPlayer.setDataSource("/storage/emulated/0/dff91403790b4f1702f4cda4b83626fa.mp4");
                mMediaPlayer.setSurface(s);
                mMediaPlayer.setLooping(true);
                mMediaPlayer.prepare();
              mMediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
                mMediaPlayer.start();
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
        @Override
        public void onSurfaceTextureSizeChanged(SurfaceTexture surface, int width, int height) {
        }
        @Override
        public boolean onSurfaceTextureDestroyed(SurfaceTexture surface) {
            if (mMediaPlayer != null) {
                mMediaPlayer.stop();
                mMediaPlayer.release();
                mMediaPlayer = null;
            }
            return false;
        }

        @Override
        public void onSurfaceTextureUpdated(SurfaceTexture surface) {
        }
    };
    mPreview.setSurfaceTextureListener(surfaceTextureListener);

}
}

请帮助我？

Answer 1

您是否在xml属性中设置onClick？如果是，则发生这种情况，因为您已使用onclick属性在xml中声明了该方法。当您使用xml中的onclick属性声明时，您必须在java代码中使用public修饰符才能工作。替换你的代码

void onClick(View v)

以下行

public void onClick(View v){

希望能帮到你。

单击按钮后如何播放视频？

1 个答案: