Am displaying a camera inside a framelayout. i would like to get the PreviewFrames from the camera on a button click.But i dont know how to do that as am an android newbie. Any help would be appreciated.thanks
My code is below:
public class MainActivity extends Activity {
private Camera mCamera;
private CameraPreview mPreview;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mCamera = getCameraInstance();
// Create our Preview view and set it as the content of our activity.
mPreview = new CameraPreview(this, mCamera);
FrameLayout preview = (FrameLayout) findViewById(R.id.camera_preview);
mCamera.setDisplayOrientation(90);
preview.addView(mPreview);
findViewById(R.id.capture).setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
public static Camera getCameraInstance(){
Camera c = null;
try {
c = Camera.open(); // attempt to get a Camera instance
}
catch (Exception e){
// Camera is not available (in use or does not exist)
}
return c; // returns null if camera is unavailable
}
public void onPreviewFrame(byte[] data, Camera camera) {
try {
Camera.Parameters parameters = camera.getParameters();
Size size = parameters.getPreviewSize();
YuvImage image = new YuvImage(data, parameters.getPreviewFormat(),
size.width, size.height, null);
File file = new File(Environment.getExternalStorageDirectory()
.getPath() + "/out.jpg");
FileOutputStream filecon = new FileOutputStream(file);
image.compressToJpeg(
new Rect(0, 0, image.getWidth(), image.getHeight()), 90,
filecon);
} catch (FileNotFoundException e) {
Toast toast = Toast
.makeText(getBaseContext(), e.getMessage(), 1000);
toast.show();
}
}
}
first of all, sorry for my poor eng ! does the word "getting camera preview frames" mean that you wanna take picture ? if right, you can use the method takePicture() in Camera class if not, you can use a flag in onPreviewFrame method that can be changed to true by your onClickListener and should be changed to false after doing stuffs
OnPreviewFrame() is a method within the PreviewCallback interface. So I think that you need to create a class implementing that interface, and to call camera.setPreviewCallback() with that object. Careful cause OnPreviewFrame is called every time a frame is available aka it will be called several times as the preview is runing.
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