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在Android程序中往往需要對(duì)圖片進(jìn)行處理，也就是將圖片解析為字節(jié)數(shù)組，讀取字節(jié)數(shù)組轉(zhuǎn)換成圖片，圖片Bitmap 和Drawable 的轉(zhuǎn)換，下邊寫(xiě)了3個(gè)方法去實(shí)現(xiàn)這寫(xiě)轉(zhuǎn)換

//bitmap 和 drawable的轉(zhuǎn)換

public static Bitmap drawableToBitmap(Drawable drawable){
    int width = drawable.getIntrinsicWidth();
    int height = drawable.getIntrinsicHeight();
    Bitmap bitmap = Bitmap.createBitmap(width, height,
    drawable.getOpacity() != PixelFormat.OPAQUE ? Bitmap.Config.ARGB_8888 : Bitmap.Config.RGB_565);
    Canvas canvas = new Canvas(bitmap);
    drawable.setBounds(0,0,width,height);
    drawable.draw(canvas);
    return bitmap;
    }

//bitmap和byte[]的轉(zhuǎn)換

public byte[] getBitmapByte(Bitmap bitmap){
    ByteArrayOutputStream out = new ByteArrayOutputStream();
    bitmap.compress(Bitmap.CompressFormat.JPEG, 100, out);
    try {
        out.flush();
        out.close();
    } catch (IOException e) {
        e.printStackTrace();
        }
    return out.toByteArray();
    }

public Bitmap getBitmapFromByte(byte[] temp){
    if(temp != null){
        Bitmap bitmap = BitmapFactory.decodeByteArray(temp, 0, temp.length);
        return bitmap;
    }else{
        return null;
        }
    }