Question

我尝试使用自己的相机界面制作应用程序。我使用android.hardware.Camera。我第一次一步一步地做this教程，但有些问题（在surfaceCreated中）NullPointerExcepiton所以我试过这个但是出了点问题。

public class AktivitaDisplej extends Activity implements SurfaceHolder.Callback {

private Camera aKamera=null;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    SurfaceView surface=new SurfaceView(this);
    surface.getHolder().addCallback(this);
    surface.getHolder().setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
    setContentView(surface);

}



@Override
public void surfaceCreated(SurfaceHolder holder) {


    try {
        aKamera=Camera.open();
        aKamera.setPreviewDisplay(holder);
    } catch (IOException e) {
        e.printStackTrace();
    }

}


@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width,
        int height) {

    Camera.Parameters param=aKamera.getParameters();
    param.setPreviewSize(width, height);
    aKamera.setParameters(param);
    aKamera.startPreview();
}



@Override
public void surfaceDestroyed(SurfaceHolder holder) {

    aKamera.stopPreview();
    aKamera.release();
    aKamera=null;
}

}

ERORRS：

08-27 21:00:52.798: E/AndroidRuntime(5093): FATAL EXCEPTION: main
08-27 21:00:52.798: E/AndroidRuntime(5093): java.lang.RuntimeException: Fail to connect to camera service
08-27 21:00:52.798: E/AndroidRuntime(5093):     at android.hardware.Camera.native_setup(Native Method)
08-27 21:00:52.798: E/AndroidRuntime(5093):     at android.hardware.Camera.<init>(Camera.java:350)
08-27 21:00:52.798: E/AndroidRuntime(5093):     at android.hardware.Camera.open(Camera.java:327)
08-27 21:00:52.798: E/AndroidRuntime(5093):     at sal.camera.AktivitaDisplej.surfaceCreated(AktivitaDisplej.java:55)

知道哪里有问题？

我自己的相机界面

0 个答案: