把String字符串转化为drawable设置成TextView的drawableRight

设置TextView的drawable：

 Drawable drawableleft = getResources().getDrawable(
         R.drawable.icon_qq_gray);
 drawableleft.setBounds(0, 0, drawableleft.getMinimumWidth(),
         drawableleft.getMinimumHeight());

 txt_bind_qq.setCompoundDrawables(drawableleft, null,
         TextToDrawable(R.string.bound), null);

把字符串转化为drawable：

 public Drawable TextToDrawable(int id) {
     Bitmap bitmap = Bitmap.createBitmap(200, 250, Config.ARGB_8888);
     Canvas canvas = new Canvas(bitmap);
     Paint paint = new Paint();
     paint.setTextSize(65);
     paint.setTextAlign(Align.LEFT);
     paint.setColor(Color.GRAY);
     String s = getResources().getString(id);
     FontMetrics fm = paint.getFontMetrics();
     canvas.drawText(s, 0, 145 + fm.top - fm.ascent, paint);
     canvas.save();
     Drawable drawableright = new BitmapDrawable(bitmap);
     drawableright.setBounds(0, 0, drawableright.getMinimumWidth(),
             drawableright.getMinimumHeight());
     return drawableright;
 }