[ACCEPTED]-Android scaledrawable doesn't seems to work-android

Just today I faced the same problem. The 11 ScaleDrawable does not seem to work. After 10 some investigation I've found the solution:

If 9 you look at the documentation you can find this phrase: "A 8 Drawable that changes the size of another 7 Drawable based on its current level value." That's 6 it.

It became clear after I found the onBoundsChange() function 5 uses the strange level variable.

For you 4 the code would be something like this:

Resources res = getResources();
ScaleDrawable sd = (ScaleDrawable) res.getDrawable(R.drawable.logo2);
Drawable d = sd.getDrawable();

d.setLevel(1);

ImageView iv = new ImageView(this);
iv.setImageDrawable(sd);
iv.setAdjustViewBounds(true); 
iv.setLayoutParams(new Gallery.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));

setContentView(iv);

Update: I 3 think the problem in the draw() function. Because 2 after an initialization the level variable 1 is 0:

public void draw(Canvas canvas) {
    if (mScaleState.mDrawable.getLevel() != 0)
        mScaleState.mDrawable.draw(canvas);
}

Update: Maybe then this code may help you:

private void useScaledImage() {
    Resources res = getResources();
    BitmapDrawable bd = (BitmapDrawable)res.getDrawable(R.drawable.sun);
    Bitmap b = Bitmap.createScaledBitmap(bd.getBitmap(),
                         (int) (bd.getIntrinsicHeight() * 0.7),
                         (int) (bd.getIntrinsicWidth() * 0.7),
                         false);

    LinearLayout l = new LinearLayout(this);
    ImageView iv = new ImageView(this);

    iv.setImageDrawable(new BitmapDrawable(b));
    iv.setLayoutParams(new Gallery.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));

    l.addView(iv);

    setContentView(l);
}

Use inset drawable instead of scale drawable

<?xml version="1.0" encoding="utf-8"?>
<inset xmlns:android="http://schemas.android.com/apk/res/android" 
    android:drawable="@drawable/logo"
    android:insetTop="2dp"
    android:insetLeft="2dp"  
    android:insetRight="2dp"
    android:insetBottom="2dp"
    >

0

You need to add level in your xml.

android:level="1"

0

To answer to the initial question, you just 11 have to initialize your ScaleDrawable's 10 Level with 10 000 in your onCreate. You 9 get your ImageView, ImageButton's drawable 8 using getIcon or getBackground (depends 7 if you set it as a source or a background) and 6 then call setLevel on it. For a MenuItem, the 5 code looks like :

    editMenuItem = menu.findItem(R.id.action_edit);
    menuItemEdit_ScaleDrawable = (ScaleDrawable) editMenuItem.getIcon();
    //when playing with scaleDrawable always initialize the level
    menuItemEdit_ScaleDrawable.setLevel(10000);

I use ScaleDrawable when 4 running animation that changes the size 3 of the drawable. For your usecase, I definitely 2 prefer managing the size of the component 1 not the drawable displayed by the component.

ScaleDrawable not only allows you to scale 10 a drawable, it also allows you to control 9 the scale using setLevel on the ScaleDrawable 8 itself. But the ScaleDrawable doesn't change 7 the intrinsic width and height of the drawable As 6 @m039 pointed out, the ScaleDrawable source 5 actually does a strange thing: when the 4 original drawable's level is set to 0, the 3 scaleDrawable itself won't draw.

To take 2 effect of the scale, you have to do something 1 like this:

ScaleDrawable scaleDrawable = (ScaleDrawable) imageView.getDrawable();
scaleDrawable.setLevel(10000);
or 
scaleDrawable.setLevel(5000);