Android分享微信小程序技巧之图片优化

public static Bitmap drawWXMiniBitmap(Bitmap bitmap, int width, int height) {
 Bitmap mBitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
 // 用这个Bitmap生成一个Canvas,然后canvas就会把内容绘制到上面这个bitmap中
 Canvas mCanvas = new Canvas(mBitmap);
 // 绘制画笔
 Paint mPicturePaint = new Paint();
 // 绘制背景图片
 mCanvas.drawBitmap(mBitmap, 0.0f, 0.0f, mPicturePaint);
 // 绘制图片的宽、高
 int width_head = bitmap.getWidth();
 int height_head = bitmap.getHeight();
 // 绘制图片－－保证其在水平方向居中
 mCanvas.drawBitmap(bitmap, (width - width_head) / 2, (height - height_head) / 2,
  mPicturePaint);
 // 保存绘图为本地图片
 mCanvas.save();
 mCanvas.restore();
 return mBitmap;
}

Bitmap bitmap = BitmapUtil.drawWXMiniBitmap(bitmap, bitmap.getHeight() * 5 / 4, bitmap.getHeight());
if (BitmapUtil.isOverSize(bitmap, 128)) {
 bitmap = Utils.resizeBitmap(bitmap, 300, 240);
}