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POAndroid camera preview in surfaceview
 

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  1. POAndroid camera preview in surfaceview
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    <p>I manage to put camera preview in surfaceview and this works great. But now i have problem with speed of other components. Because now it is really slow. </p> <p>Do i need to put camera in new thread? How to decrease fps or resolution? Because this what i have now does not work properly. </p> <p>My surface view:</p> <pre><code>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 ); } } </code></pre> <p>My xml:</p> <pre><code>. . . &lt;TableRow android:layout_width="match_parent" android:layout_height="fill_parent" &gt; &lt;FrameLayout android:id="@+id/preview" android:layout_width="133dp" android:layout_height="100dp" android:layout_margin="20dp" &gt; &lt;/FrameLayout&gt; . . . </code></pre> <p>And how i call in main activity:</p> <pre><code>KameraSurface preview = new KameraSurface(getApplicationContext()); ((FrameLayout) findViewById(R.id.preview)).addView(preview); </code></pre>
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