Tag: camera

Need help again!

I am developing an app that only uses the smartphone camera to show the camera, ie it does not record any photos or videos, just a preview.

Already managed to open the smartphone camera in activity and all. The problem was that I noticed my app's camera view compared to other apps and the default app on my smartphone and noticed that my app was distorting the image displayed on my camera.

Below the pictures, to illustrate what happens.

Note: Both pictures were taken from the same distance and position.

Figure 1 – Standard Smartphone Camera and Normal Mode (ORIENTATION_LANDSCAPE)

Picture 2 – Camera of my app and normal mode (ORIENTATION_LANDSCAPE)

Note that Image 1, is sharper and "thinner", ie original image size without zoom included. Nice picture 2, is "chubby" flattened, ie distorted.

Below the code of the classes, layout XML and manifest file of the application:

XML

JAVA MAIN ACTIVITY CLASS

public class MainActivity extends AppCompatActivity {

Camera camera;
FrameLayout frameLayout;
CameraPreview cameraPreview;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    frameLayout = findViewById(R.id.frameLayoutCameraPreview);
    camera = Camera.open();
    cameraPreview = new CameraPreview(this, camera);
    frameLayout.addView(cameraPreview);

}

@Override
public void onWindowFocusChanged(boolean hasFocus) {
    super.onWindowFocusChanged(hasFocus);
    View decorView = getWindow().getDecorView();
    if (hasFocus){
        decorView.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_STABLE
                | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY
                | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
                | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
                | View.SYSTEM_UI_FLAG_FULLSCREEN
                | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION);
    }
}

@Override
protected void onPause() {
    super.onPause();
    if (camera != null){
        camera.stopPreview();
        camera.release();
        camera = null;
    }
}

}

JAVA CLASS DISPLAYING CAMERA

public class CameraPreview extends SurfaceView implements SurfaceHolder.Callback{

Camera camera;
SurfaceHolder holder;

public CameraPreview(Context context, Camera camera) {
    super(context);

    this.camera = camera;
    this.holder = getHolder();
    this.holder.addCallback(this);

}

@Override
public void surfaceCreated(SurfaceHolder holder) {
    Camera.Parameters parameters = camera.getParameters();
    List sizes = parameters.getSupportedPictureSizes();
    Camera.Size mSize = null;

    for (Camera.Size size: sizes){
        mSize = size;
    }

    if (this.getResources().getConfiguration().orientation != Configuration.ORIENTATION_LANDSCAPE){
        parameters.set("orientation", "portrait");
        camera.setDisplayOrientation(90);
        parameters.setRotation(90);
    }else {
        parameters.set("orientation", "portrait");
        camera.setDisplayOrientation(0);
        parameters.setRotation(0);
    }

    parameters.setPictureSize(mSize.width, mSize.height);
    camera.setParameters(parameters);

    try {
        camera.setPreviewDisplay(holder);
        camera.startPreview();
    } catch (IOException e){
        e.printStackTrace();
    }
}

@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {

}

@Override
public void surfaceDestroyed(SurfaceHolder holder) {
    camera.stopPreview();
    camera.release();
}

}

ANDROID MANIFESTO

If someone can give me a light where I make a mistake, thank you?