添加媒体播放器功能而无需oncreate

Question

我正在制作一个摄像头应用程序，但是我想向该活动中添加音乐，例如，我有一个片段：

public class Camera extends Fragment

这是我在照片中的错误：

here

但是此代码在Create上显示，因为我有片段活动和完整的代码：

    implements View.OnClickListener, FragmentCompat.OnRequestPermissionsResultCallback {
private static final int SENSOR_ORIENTATION_DEFAULT_DEGREES = 90;
private static final int SENSOR_ORIENTATION_INVERSE_DEGREES = 270;
private static final SparseIntArray DEFAULT_ORIENTATIONS = new SparseIntArray();
private static final SparseIntArray INVERSE_ORIENTATIONS = new SparseIntArray();

private static final String TAG = "Camera2VideoFragment";
private static final int REQUEST_VIDEO_PERMISSIONS = 1;
private static final String FRAGMENT_DIALOG = "dialog";

private static final String[] VIDEO_PERMISSIONS = {
        Manifest.permission.CAMERA,
        Manifest.permission.RECORD_AUDIO,
};

static {
    DEFAULT_ORIENTATIONS.append(Surface.ROTATION_0, 90);
    DEFAULT_ORIENTATIONS.append(Surface.ROTATION_90, 0);
    DEFAULT_ORIENTATIONS.append(Surface.ROTATION_180, 270);
    DEFAULT_ORIENTATIONS.append(Surface.ROTATION_270, 180);
}
MediaPlayer mediaPlayer=MediaPlayer.create(Camera2VideoFragment.this,R.raw.adn);


static {
    INVERSE_ORIENTATIONS.append(Surface.ROTATION_0, 270);
    INVERSE_ORIENTATIONS.append(Surface.ROTATION_90, 180);
    INVERSE_ORIENTATIONS.append(Surface.ROTATION_180, 90);
    INVERSE_ORIENTATIONS.append(Surface.ROTATION_270, 0);
}

Answer 1

我认为问题在于您传递的Fragment应该是Context。 尝试更改Camera2VideoFragment.this.getContext()。