Android-Kamera-Vorschau in surfaceview

Ich zu verwalten, um die Kamera-Vorschau in surfaceview und das funktioniert Super. Aber jetzt habe ich problem mit der Geschwindigkeit der anderen Komponenten. Denn jetzt ist es wirklich langsam.

Brauche ich um die Kamera im neuen thread? Wie zu verringern die fps oder die Auflösung? Weil das was ich jetzt habe funktioniert nicht richtig.

Mein surface view:

class KameraSurface extends SurfaceView implements SurfaceHolder.Callback {
    private static final String TAG = "Preview";

    SurfaceHolder mHolder;
    public Camera camera;

    KameraSurface(Context context) {
        super(context);

        //Install a SurfaceHolder.Callback so we get notified when the
        //underlying surface is created and destroyed.
        mHolder = getHolder();
        mHolder.addCallback(this);
        mHolder.setFormat(PixelFormat.RGB_332);
        mHolder.setType(SurfaceHolder.SURFACE_TYPE_GPU);
    }

    public void surfaceCreated(SurfaceHolder holder) {
        //The Surface has been created, acquire the camera and tell it where
        //to draw.

         camera = Camera.open();

         Camera.Parameters p = camera.getParameters();
         p.setPictureSize(80, 60);
         p.setColorEffect(android.hardware.Camera.Parameters.EFFECT_NONE);
         p.setJpegQuality(20);
         p.setPreviewFrameRate(1);
         p.setPreviewFpsRange(5, 10);
         p.setPreviewSize(80, 60);
         camera.setParameters(p);



        try {
            camera.setPreviewDisplay(holder);


            camera.setPreviewCallback(new PreviewCallback() {

                public void onPreviewFrame(byte[] data, Camera arg1) {
                    //KameraSurface.this.invalidate();
                }
            });
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public void surfaceDestroyed(SurfaceHolder holder) {
        //Surface will be destroyed when we return, so stop the preview.
        //Because the CameraDevice object is not a shared resource, it's very
        //important to release it when the activity is paused.
        camera.stopPreview();
        camera = null;
    }
public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {
        //Now that the size is known, set up the camera parameters and begin
        //the preview.
        Camera.Parameters parameters = camera.getParameters();
        parameters.setPreviewSize(80, 60);
        camera.setParameters(parameters);

        camera.startPreview();
    }

    @Override
    public void draw(Canvas canvas) {
            super.draw(canvas);
            Paint p= new Paint(Color.RED);
            Log.d(TAG,"draw");
            canvas.drawText("PREVIEW", canvas.getWidth()/2, canvas.getHeight()/2, p );
    }
}

Mein xml:

.
.
.
 <TableRow
            android:layout_width="match_parent"
            android:layout_height="fill_parent" >

            <FrameLayout
                android:id="@+id/preview"
                android:layout_width="133dp"
                android:layout_height="100dp"
                android:layout_margin="20dp" >
            </FrameLayout>
.
.
.

Und wie rufe ich im main-Aktivität:

KameraSurface preview = new KameraSurface(getApplicationContext());
                ((FrameLayout) findViewById(R.id.preview)).addView(preview);

InformationsquelleAutor Mihael Meklav | 2012-08-07