Android(安卓)Drawable、Bitmap、byte[]之间的转换
16lz
2022-06-14
1、Drawable → Bitmap
Java代码
Java代码
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; } 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 Resources res=getResources(); 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 private byte[] Bitmap2Bytes(Bitmap bm){ ByteArrayOutputStream baos = new ByteArrayOutputStream(); bm.compress(Bitmap.CompressFormat.PNG, 100, baos); return baos.toByteArray(); } 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 private Bitmap Bytes2Bimap(byte[] b){ if(b.length!=0){ return BitmapFactory.decodeByteArray(b, 0, b.length); } else { return null; } } private Bitmap Bytes2Bimap(byte[] b){ if(b.length!=0){ return BitmapFactory.decodeByteArray(b, 0, b.length); } else { return null; } }
更多相关文章
- Android屏蔽HOME键
- EXOPlayer居中播放,类似ImageView的CENTER_CROP
- Android简明开发教程十六:Button 画刷示例
- android 保持屏幕长亮及解锁的方法
- android获取设备屏幕大小的方法
- Android(安卓)获取手机的IMEI等设备信息
- android 获取进程名字
- Android(安卓)实现Activity后台运行
- android获取屏幕相关信息