launcher3图标icon背景及文字处理

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图标聚焦背景

packages\apps\Launcher3\res\drawable\focusable_view_bg.xml

图标文字背景

packages\apps\Launcher3\src\com\android\launcher3\BubbleTextView.java

packages\apps\Launcher3\src\com\android\launcher3\Utilities.java

static final int[] APP_ICON_BG = {
R.drawable.appsiconbg,
R.drawable.appsiconbg,
R.drawable.appsiconbg,
R.drawable.appsiconbg,
R.drawable.appsiconbg
};

static Bitmap createIconBitmap(Drawable icon, Context context) {

synchronized (sCanvas) {

...

if (debug) {
// draw a big box for the icon for debugging
canvas.drawColor(sColors[sColorIndex]);
if (++sColorIndex >= sColors.length) sColorIndex = 0;
Paint debugPaint = new Paint();
debugPaint.setColor(0xffcccc00);
canvas.drawRect(left, top, left+width, top+height, debugPaint);
}

if (true)
{
int index = new Random(System.currentTimeMillis()).nextInt(5);

//Bitmap backBitmap = BitmapFactory.decodeResource(context.getResources(),APP_ICON_BG[index]);
Bitmap backBitmap = BitmapFactory.decodeResource(context.getResources(),R.drawable.appsiconbg);
int backWidth = backBitmap.getWidth();
int backHeight = backBitmap.getHeight();
if(backWidth != sIconWidth || backHeight != sIconHeight)
{
Matrix matrix = new Matrix();
matrix.postScale((float)sIconWidth/backWidth, (float)sIconHeight/backHeight);
canvas.drawBitmap(Bitmap.createBitmap(backBitmap, 0, 0, backWidth, backHeight, matrix, true),0.0f, 0.0f, null);
}else
{
canvas.drawBitmap(backBitmap, 0.0f, 0.0f, null);
}
}

...

// 如果原图标太大，看不到背景，可以把原图标缩小

//icon.setBounds(left, top, left+width, top+height);
icon.setBounds(left+15, top+15, left+width-15, top+height-15);

}

参考http://blog.csdn.net/xuhui_7810/article/details/36901815

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