Android BitMap转化

android在处理一写图片资源的时候，会进行一些类型的转换，现在有空整理一下：

1、Drawable → Bitmap

Java代码

1.public static Bitmap drawableToBitmap(Drawable drawable) {

2.

3. Bitmap bitmap = Bitmap

4. .createBitmap(

5. drawable.getIntrinsicWi

dth(),

6. drawable.getIntrinsicHe

ight(),

7. drawable.getOpacity() !

= PixelFormat.OPAQUE ? Bitmap.Config.ARGB_8888

8. : Bitma

p.Config.RGB_565);

9. Canvas canvas = new Canvas(bitmap);

10. //canvas.setBitmap(bitmap);

11. drawable.setBounds(0, 0, drawable.getIntrinsicWidth(),

drawable.getIntrinsicHeight());

12. drawable.draw(canvas);

13. return bitmap;

14.}

2、从资源中获取Bitmap

Java代码

1.Resources res=getResources();

2.

3.Bitmap bmp=BitmapFactory.decodeResource(res, R.drawable.pic);

3、Bitmap → byte[]

Java代码

1.private byte[] Bitmap2Bytes(Bitmap bm){

2. ByteArrayOutputStream baos = new ByteArrayOutputStream();

3. https://www.360docs.net/doc/7c6698414.html,press(https://www.360docs.net/doc/7c6698414.html,pressFormat.PNG, 100, baos);

4. return baos.toByteArray();

5. }

4、byte[] → Bitmap

Java代码

1.private Bitmap Bytes2Bimap(byte[] b){

2. if(b.length!=0){

3. return BitmapFactory.decodeByteArray(b, 0, b.le

ngth);

4. }

5. else {

6. return null;

7. }

8. }

以上是我在实践中遇到的一些转换，以后遇到类似的就不用到处找了，希望对大家也有一点用处！