Image brightness increases even when you move the Seekbar scrollbar to the left

Question

In my application, I want to change the brightness of an image in ImageView. For this purpose I use the search bar. It changes the brightness of the image when I move the scroll bar to the right, but when I want to decrease the brightness and move to the left, the brightness increases and the image becomes almost white. It is also so difficult to use the search barrier as a user. It does not move very smoothly. Can someone please help me improve my code as I am new to programming.

Here is the piece of code:

When you click the filter button:

btn_filter.setOnClickListener(new View.OnClickListener() {

    @Override
    public void onClick(View v) {
      Log.e("EditPhoto", "counter value = " + counter);
      counter++;
      sbarBrightness = (SeekBar) findViewById(R.id.seekBarForBrightness);
        if (counter % 2 == 0) {
            sbarBrightness.setVisibility(View.INVISIBLE);
        } else {
            sbarBrightness.setVisibility(View.VISIBLE);
        }
    sbarBrightness.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {
     int brightness;
     @Override
    public void onProgressChanged(SeekBar seekBar, int progress, boolean
                                          fromUser) {

    brightness = progress;
    imageBitmap = doBrightness(imageBitmap, brightness);
    putGestureImageOnScreen(imageBitmap);
 }
   });
  }
 });

public static Bitmap doBrightness(Bitmap src, int value) {
    Log.e("Brightness", "Changing brightnhjh");

    int width = src.getWidth();
    int height = src.getHeight();
    Bitmap bmout = Bitmap.createBitmap(width, height, src.getConfig());
    int A, R, G, B;
    int pixel;
    for (int i = 0; i < width; ++i) {
        for (int j = 0; j < height; ++j) {
            pixel = src.getPixel(i, j);
            A = Color.alpha(pixel);
            R = Color.red(pixel);
            G = Color.green(pixel);
            B = Color.blue(pixel);
            R += value;
            if (R > 255) {
                R = 255;
            } else if (R < 0) {
                R = 0;
            }
            G += value;
            if (G > 255) {
                G = 255;
            } else if (G < 0) {
                G = 0;
            }
            B += value;
            if (B > 255) {
                B = 255;
            } else if (B < 0) {
                B = 0;
            }
            bmout.setPixel(i, j, Color.argb(A, R, G, B));
        }
    }
    return bmout;

}

Search engine ad in layout:

<SeekBar
    android:id="@+id/seekBarForBrightness"
    android:layout_width="500dp"
    android:layout_height="50dp"
    android:layout_alignParentTop="true"
    android:layout_centerHorizontal="true"
    style="@style/tallerBarStyle"        
    android:layout_marginTop="64dp"
    android:visibility="invisible" />

and this style is as follows:

<style name="tallerBarStyle" parent="@android:style/Widget.SeekBar">
    <item name="android:indeterminateOnly">false</item>
    <item name="android:progressDrawable">@android:drawable/progress_horizontal</item>
    <item
     name="android:indeterminateDrawable">@android:drawable/progress_horizontal</item>
    <item name="android:minHeight">8dip</item>
    <item name="android:maxHeight">10dip</item>
</style>

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Answer 1

Bitmap (imageBitmap = doBrightness(imageBitmap, brightness);). , , .

brightness = progress;
//imageBitmap = doBrightness(imageBitmap, brightness);
putGestureImageOnScreen(doBrightness(imageBitmap, brightness));

Intent Activity , .