图像过滤器代码的源错误是什么？

Question

我的Main2Activity班级

public class Main2Activity extends AppCompatActivity {
Uri imageUri;
Bitmap bitmap;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main2);
    imageView2 = (ImageView) findViewById(R.id.imageView2);
//It not show error.
 if (getIntent().getExtras() != null) {
        try {
            imageUri = Uri.parse(getIntent().getStringExtra("imageUri"));
            bitmap = MediaStore.Images.Media.getBitmap(getContentResolver(), imageUri);
            int nh = (int) (bitmap.getHeight() * (1024.0 / bitmap.getWidth()));
                           // Set image
            Picasso.with(this).load(imageUri).
                    resize(1024, nh).
                    into(imageView2);

        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}


//Show trouble code.
public void ColorMake(View v) {
    int width = bitmap.getWidth();
    int height = bitmap.getHeight();
    Bitmap bmOut = Bitmap.createBitmap(width, height, bitmap.getConfig());
    int A, R, G, B;
    double red = 1.3;
    double green = 1.0;
    double blue = 1.2;
    int pixel;

    for (int x = 0; x < width; ++x) {
        for (int y = 0; y < height; ++y) {
            pixel = bitmap.getPixel(x, y);

            A = Color.alpha(pixel);
            R = (int) (Color.red(pixel) * red);
            G = (int) (Color.green(pixel) * green);
            B = (int) (Color.blue(pixel) * blue);

            bmOut.setPixel(x, y, Color.argb(A, R, G, B));
    }
   }
  }
 }

它不是显示错误，但在设备上不起作用。