android 拍照图片旋转有关问题_Android

android 拍照图片旋转问题

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前阵子写了一个拍照的程序，拍完照片图片怎么看都是歪的，找了好久借鉴了很多博客找到了解决的办法，不说了看代码把

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mOrientationListener?=?new?OrientationEventListener(this){??
????????????@Override??
????????????public?void?onOrientationChanged(int?orientation)?{??
????????????????orientations?=orientation;??
????????????????Log.v("time",?"现在是横屏"+orientation);??
??????????????????
????????????}??
????????};??

在oncreate方法中添加OrientationEventListener，OrientationEventListener(方向事件监听器)是一个当方向发生变化时, 从 SensorManager(传感器管理程序)接收通知的辅助类，我就是通过这个来判断手机屏幕的旋转角度，从而将获取后的图片做相应的旋转。

接下来我在onResume中启动事件的监听器

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if(mOrientationListener!=null){//先判断下防止出现空指针异常??
????????????mOrientationListener.enable();??
????????}??

然后就可以在onPictureTaken中将图片旋转相应的角度：

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BitmapFactory.Options?opts?=?new?BitmapFactory.Options();??
????????????????opts.inPreferredConfig?=?Config.RGB_565;??
????????????????opts.inSampleSize?=4;???
????????????????Bitmap?bmp?=?BitmapFactory.decodeByteArray(images,?0,?images.length,opts);??
????????????????Matrix?matrixs?=?new?Matrix();??
????????????????????if(orientations?>?325?||?orientations?<=?45){??
????????????????????????Log.v("time",?"Surface.ROTATION_0;"+orientations);??
????????????????????????matrixs.setRotate(90);??
????????????????????}else?if(orientations?>?45?&&?orientations?<=?135){??
????????????????????????Log.v("time",?"?Surface.ROTATION_270"+orientations);??
????????????????????matrixs.setRotate(180);??
????????????????????}else?if(orientations?>?135?&&?orientations?<?225){??
????????????????????????Log.v("time",?"Surface.ROTATION_180;"+orientations);??
????????????????????matrixs.setRotate(270);??
????????????????????}else?{??
????????????????????????Log.v("time",?"Surface.ROTATION_90"+orientations);??
????????????????????matrixs.setRotate(0);??
????????????????????}??
????????????????bmp?=?Bitmap.createBitmap(bmp,?0,?0,?bmp.getWidth(),?bmp.getHeight(),?matrixs,?true);??

这样图片就旋转过来了，最后别忘了在onPause中将事件监听器关掉：

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if(mOrientationListener!=null){??
????????????mOrientationListener.disable();??
????????}??

ok！这样就完成了。这算是一点小小的收获吧！