How to change actionBar icon size?

Question

The actionBar icon should like image

When the device resolution is 1920x1080 and android 4.2 above, the icon size looks very small: image

(android 4.1 is correct)

My problem seems like i-want-to-change-actionbar-icon-size.

The icon image size is 113x40, then I use getActionBar().getHeight() to get ActionBar height is 56.

menu.xml:

<menu xmlns:android="http://schemas.android.com/apk/res/android" >

<item 
    android:id="@+id/menu_buyer"
    android:icon="@drawable/buyer_bts"
    android:showAsAction="ifRoom"/>
<item
    android:id="@+id/menu_exhibition_bt"
    android:icon="@drawable/exhibition_bt"
    android:showAsAction="ifRoom"/>
<item
    android:id="@+id/menu_oj"
    android:icon="@drawable/download_bt"
    android:showAsAction="ifRoom"/>

I tried following method but doesn't work:

1. create bigger icon image (ex.170x60) then put into drawable-hdpi(xhdpi, xxhdpi...etc.) folder

2. use menu.findItem(R.id.menu_buyer).setIcon(resizeImage(int resId, int w, int h)); to resize icon

3. added a style < item name="android:actionBarSize" > 200dp < /item > in style.xml then set theme in Manifest file

Is there a way can show the icon correctly?

Answer 1

Too late to answer but, I found the answer

It's quite simple. First, convert drawable into a bitmap, resize it and re-convert into drawable. Then get the item of the menu and set the icon as the new drawable.

Please add this re-size method on your activity as follow.

private Bitmap resizeBitmapImageFn(
        Bitmap bmpSource, int maxResolution){
    int iWidth = bmpSource.getWidth();
    int iHeight = bmpSource.getHeight();
    int newWidth = iWidth ;
    int newHeight = iHeight ;
    float rate = 0.0f;

    if(iWidth > iHeight ){
        if(maxResolution < iWidth ){
            rate = maxResolution / (float) iWidth ;
            newHeight = (int) (iHeight * rate);
            newWidth = maxResolution;
        }
    }else{
        if(maxResolution < iHeight ){
            rate = maxResolution / (float) iHeight ;
            newWidth = (int) (iWidth * rate);
            newHeight = maxResolution;
        }
    }

    return Bitmap.createScaledBitmap(
            bmpSource, newWidth, newHeight, true);
}

and add the work in the onCreateOptionsMenu

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.menu_main, menu);

    Bitmap icon = BitmapFactory.decodeResource(getResources(), R.drawable.ic_navigation_drawer); //Converting drawable into bitmap
    Bitmap new_icon = resizeBitmapImageFn(icon, 50); //resizing the bitmap
    Drawable d = new BitmapDrawable(getResources(),new_icon); //Converting bitmap into drawable
    menu.getItem(0).setIcon(d); //choose the item number you want to set
    return true;
}