android解决坚屏拍照和保存图片旋转90度的问题，并兼容4.0

转自： http://www.cnblogs.com/andgoo/archive/2012/08/29/2661896.html

第一步: AndroidManifest.xml 在Activity添加以下一个属性

<span>android:configChanges="orientation|keyboardHidden|screenSize" android:screenOrientation="sensor"，为的是能够横竖屏切换不用再次调用onCreate方法，直接调用onConfigurationChanged方法。screenSize是兼容4.0系统的才可以生效，否则方法没效。</span>

<application android:label="@string/app_name"

        android:icon="@drawable/ic_launcher">

       <activity android:name=".MainActivity" 

                  android:label="@string/app_name"

                  <span style="color: #ff0000;">android:configChanges="orientation|keyboardHidden|screenSize" android:screenOrientation="sensor"</span>> 

            <intent-filter> 

                <action android:name="android.intent.action.MAIN" /> 

                <category android:name="android.intent.category.LAUNCHER" /> 

            </intent-filter> 

        </activity>

    </application>

第二步，解决竖屏拍照后保存图片会旋转90度的问题。这里我会在onConfigurationChanged方法进行判断当前是横拍还是竖拍，然后在调用相机拍照后，在保存图片的方法里，进行竖拍的照片90度旋转。

     

PictureCallback jpeg = new PictureCallback() { 

           

        @Override 

        public void onPictureTaken(byte[] data, Camera camera) { 

            // TODO Auto-generated method stub 

             Bitmap bMap;

            try 

            {// 获得图片 

                  

                 

                bMap = BitmapFactory.decodeByteArray(data, 0, data.length); 

                  

                Bitmap bMapRotate; 

                if (takeType != 0) {  //坚拍

                    Matrix matrix = new Matrix(); 

                    matrix.reset(); 

                    matrix.postRotate(90); 

                    bMapRotate = Bitmap.createBitmap(bMap, 0,0, bMap.getWidth(), 

                            bMap.getHeight(), matrix, true);

                    bMap = bMapRotate;

                }

           

           // Bitmap bm = BitmapFactory.decodeByteArray(data, 0, data.length); 

            File file = new File(filePath); 

            BufferedOutputStream bos = 

                new BufferedOutputStream(new FileOutputStream(file)); 

            bMap.compress(Bitmap.CompressFormat.JPEG,100, bos);//将图片压缩到流中 

            bos.flush();//输出 

            bos.close();//关闭 

            }catch(Exception e) 

            { 

                e.printStackTrace(); 

            } 

               

        } 

    }; 

　　关键代码是以上。

　

 当用竖拍转横拍，还是横拍转竖拍，都要先在surfaceChanged方法，停止预览相机，重新设置下摄像头就不会再出现90度旋转。