I am trying to use the PreviewCallback but i get an IOException
saying:
"startPreview failed". I run the emulator in the debugger. I am pretty
stuck here. Are there any examples using the PreviewCallback. It would
be so nice to get this working since i have 4 great ideas for
applications that all need to use the camera preview and apply a
filter or overlay.
Thanx.
The code that fails:
public class CamApp extends Activity implements Camera.PreviewCallback
{
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
SurfaceView surfView = new SurfaceView(this);
setContentView(surfView);
Camera cam = Camera.open();
Camera.Parameters parameters = cam.getParameters();
parameters.setPreviewSize(100, 100);
cam.setParameters(parameters);
cam.setPreviewCallback(this);
cam.startPreview();
}
@Override
public void onPreviewFrame(byte[] data, Camera camera) {
}
}
Stack Trace
Code:
Thread [<3> main] (Suspended (exception RuntimeException))
ActivityThread.performLaunchActivity(ActivityThread$ActivityRecord)
line: 2140 <--- Here is where i can see the IOException
ActivityThread.handleLaunchActivity(ActivityThread$ActivityRecord)
line: 2156
ActivityThread.access$1800(ActivityThread, ActivityThread
$ActivityRecord) line: 112
ActivityThread$H.handleMessage(Message) line: 1580
ActivityThread$H(Handler).dispatchMessage(Message) line: 88
Looper.loop() line: 123
ActivityThread.main(String[]) line: 3742
Method.invokeNative(Object, Object[], Class, Class[], Class, int,
boolean) line: not available [native method]
Method.invoke(Object, Object...) line: 515
ZygoteInit$MethodAndArgsCaller.run() line: 739
ZygoteInit.main(String[]) line: 497
NativeStart.main(String[]) line: not available [native method]
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