Drawable、Bit地图、byte[]之间的转换
Drawable、Bitmap、byte[]之间的转换
1、Drawable → Bitmap
Java代码
1.public static Bitmap drawableToBitmap(Drawable drawable) {
2.
3. Bitmap bitmap = Bitmap
4. .createBitmap(
5. drawable.getIntrinsicWidth(),
6. drawable.getIntrinsicHeight(),
7. drawable.getOpacity() != PixelFormat.OPAQUE ? Bitmap.Config.ARGB_8888
8. : Bitmap.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.}
public static Bitmap drawableToBitmap(Drawable drawable) {
Bitmap bitmap = Bitmap
.createBitmap(
drawable.getIntrinsicWidth(),
drawable.getIntrinsicHeight(),
drawable.getOpacity() != PixelFormat.OPAQUE ? Bitmap.Config.ARGB_8888
: Bitmap.Config.RGB_565);
Canvas canvas = new Canvas(bitmap);
//canvas.setBitmap(bitmap);
drawable.setBounds(0, 0, drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight());
drawable.draw(canvas);
return bitmap;
}
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);
Resources res=getResources();
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. bm.compress(Bitmap.CompressFormat.PNG, 100, baos);
4. return baos.toByteArray();
5. }
private byte[] Bitmap2Bytes(Bitmap bm){
ByteArrayOutputStream baos = new ByteArrayOutputStream();
bm.compress(Bitmap.CompressFormat.PNG, 100, baos);
return baos.toByteArray();
}
4、 byte[] → Bitmap
Java代码
1.private Bitmap Bytes2Bimap(byte[] b){
2. if(b.length!=0){
3. return BitmapFactory.decodeByteArray(b, 0, b.length);
4. }
5. else {
6. return null;
7. }
8. }
1、Drawable → Bitmap
Java代码
1.public static Bitmap drawableToBitmap(Drawable drawable) {
2.
3. Bitmap bitmap = Bitmap
4. .createBitmap(
5. drawable.getIntrinsicWidth(),
6. drawable.getIntrinsicHeight(),
7. drawable.getOpacity() != PixelFormat.OPAQUE ? Bitmap.Config.ARGB_8888
8. : Bitmap.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.}
public static Bitmap drawableToBitmap(Drawable drawable) {
Bitmap bitmap = Bitmap
.createBitmap(
drawable.getIntrinsicWidth(),
drawable.getIntrinsicHeight(),
drawable.getOpacity() != PixelFormat.OPAQUE ? Bitmap.Config.ARGB_8888
: Bitmap.Config.RGB_565);
Canvas canvas = new Canvas(bitmap);
//canvas.setBitmap(bitmap);
drawable.setBounds(0, 0, drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight());
drawable.draw(canvas);
return bitmap;
}
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);
Resources res=getResources();
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. bm.compress(Bitmap.CompressFormat.PNG, 100, baos);
4. return baos.toByteArray();
5. }
private byte[] Bitmap2Bytes(Bitmap bm){
ByteArrayOutputStream baos = new ByteArrayOutputStream();
bm.compress(Bitmap.CompressFormat.PNG, 100, baos);
return baos.toByteArray();
}
4、 byte[] → Bitmap
Java代码
1.private Bitmap Bytes2Bimap(byte[] b){
2. if(b.length!=0){
3. return BitmapFactory.decodeByteArray(b, 0, b.length);
4. }
5. else {
6. return null;
7. }
8. }