I am trying to render camera preview using SurfaceTexture. I read the document but unable to understand how it works.
Can anyone provide one sample example(very basic one) or link which uses SurfaceTexture to preview camera. I googled this but not found what I am looking for.
Thanks in advance.
If you want to use the Camera with TextureSurface you can implement SurfaceTextureListener interface. You'll have to implement 4 methods:
1) onSurfaceTextureAvailable - Here you setup your camera
2)onSurfaceTextureSizeChanged - In your case, the Android's camera will handle this method
3)onSurfaceTextureDestroyed - Here you destroy all camera stuff.
4) onSurfaceTextureUpdated- Update your texture here when you have something to change!
Check the example below:
public class MainActivity extends Activity implements SurfaceTextureListener{
private Camera mCamera;
private TextureView mTextureView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mTextureView = new TextureView(this);
mTextureView.setSurfaceTextureListener(this);
setContentView(mTextureView);
}
@Override
public void onSurfaceTextureAvailable(SurfaceTexture surface, int width, int height) {
mCamera = Camera.open();
Camera.Size previewSize = mCamera.getParameters().getPreviewSize();
mTextureView.setLayoutParams(new FrameLayout.LayoutParams(
previewSize.width, previewSize.height, Gravity.CENTER));
try {
mCamera.setPreviewTexture(surface);
} catch (IOException t) {
}
mCamera.startPreview();
}
@Override
public void onSurfaceTextureSizeChanged(SurfaceTexture surface, int width, int height) {
// Ignored, the Camera does all the work for us
}
@Override
public boolean onSurfaceTextureDestroyed(SurfaceTexture surface) {
mCamera.stopPreview();
mCamera.release();
return true;
}
@Override
public void onSurfaceTextureUpdated(SurfaceTexture surface) {
// Update your view here!
}
}
Two more things: Don't forget to add the camera permissions in your project's manifest and the SurfaceTexture is available from API 11.
