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POCamera Preview: No errors but no picture :-(
 

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  1. POCamera Preview: No errors but no picture :-(
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    <p>Have read the books and hints, got rid of all compile errors and warnings and put in some debug statements.</p> <pre><code>package com.cit.BroadcastSim; import java.io.IOException; import android.app.Activity; import android.hardware.Camera; import android.os.Bundle; import android.util.Log; import android.view.SurfaceHolder; import android.view.SurfaceView; public class BroadcastActivity extends Activity implements SurfaceHolder.Callback { public Camera myCamera; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.broadcast); // Inflate the broadcast.xml file Log.d("BROADCAST", "Creating the Activity"); SurfaceView cameraSurface = (SurfaceView)findViewById(R.id.camerasurface); SurfaceHolder cameraHolder = cameraSurface.getHolder(); cameraHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS); cameraHolder.addCallback(this); Log.d("BROADCAST", "Now wait for some CallBacks"); } public void surfaceCreated(SurfaceHolder holder) { // Surface created, now it is possible to set the preview Log.d("BROADCAST", "Surface Created"); try { Log.d("BROADCAST","CAMERA: NOT NULL"); myCamera = Camera.open(); myCamera.setPreviewDisplay(holder); myCamera.startPreview(); } catch (IOException e) { Log.d("BROADCAST", e.getMessage()); } } public void surfaceDestroyed(SurfaceHolder holder) { Log.d("BROADCAST", "Surface Destroyed"); myCamera.stopPreview(); myCamera.release(); } public void surfaceChanged(SurfaceHolder holder, int I, int J, int K) { Log.d("BROADCAST", "Surface Changed"); myCamera.stopPreview(); myCamera.release(); } } </code></pre> <p>In the DDMS debugger, I get a log message for 'Creating the Activity' followed by 'Now wait for some CallBacks' and nothing more in terms of my Debug messages so I think Callback is not working - for the life of me can't see where I have got it wrong.</p> <p>In the manifest I have</p> <p> </p> <p>The Activity XML page has</p> <pre><code>&lt;TextView android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="@string/Broadcast" /&gt; &lt;SurfaceView android:layout_width="fill_parent" android:layout_height="fill_parent" android:id="@+id/camerasurface" /&gt; &lt;/LinearLayout&gt; </code></pre> <p>Finally, on the Android phone (HTC Wildfire), the page loads, the textView message appears at the top left and that is all.</p> <p>Should mention that I am very new to this platform and accept that I might have missed something very very basic.</p> <p>Any ideas/comments will be very much appreciated,</p> <p>Oliver</p>
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