android+录像方向,Android拍照、摄像方向旋转的问题 代码具体解释

近期做了个拍照、摄像的应用。遇到了拍照、摄像的图像相对于现实。翻转了90度。原因：相机这个硬件的角度是横屏的角度，所以会出现都是横屏的。

1.照相、摄影预览图像的正确角度显 示：

public static void setCameraDisplayOrientation(Activity activity,

int cameraId, android.hardware.Camera camera) {

android.hardware.Camera.CameraInfo info =

new android.hardware.Camera.CameraInfo();

android.hardware.Camera.getCameraInfo(cameraId, info);

int rotation = activity.getWindowManager().getDefaultDisplay()

.getRotation();

int degrees = 0;

switch (rotation) {

case Surface.ROTATION_0: degrees = 0; break;

case Surface.ROTATION_90: degrees = 90; break;

case Surface.ROTATION_180: degrees = 180; break;

case Surface.ROTATION_270: degrees = 270; break;

}

int result;

if (info.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) {

result = (info.orientation + degrees) % 360;

result = (360 - result) % 360; // compensate the mirror

} else { // back-facing

result = (info.orientation - degrees + 360) % 360;

}

camera.setDisplayOrientation(result);

}

改方法动态获取手机是Landscape(横屏)或Portrait(竖屏)来更改预览图。

(后屏的cameraId是0 )

2.图像保存的正确角度(当我们拍下照片，发现角度又不正确)

@Override

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

try {

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

android.hardware.Camera.CameraInfo info = new android.hardware.Camera.CameraInfo();

android.hardware.Camera.getCameraInfo(0, info);

Bitmap bitmap = rotate(realImage, info.orientation);

FileOutputStream fos = new FileOutputStream(pictureFile);

bitmap.compress(Bitmap.CompressFormat.JPEG, 100, fos);

fos.close();

// FileOutputStream fos = new FileOutputStream(pictureFile);

// fos.write(data);

// fos.close();

DBRecordAdapter.getInstance().insertRecord(bean);

} catch (FileNotFoundException e) {

Log.d(TAG, "File not found: " + e.getMessage());

} catch (IOException e) {

Log.d(TAG, "Error accessing file: " + e.getMessage());

}}

3.录像回放的正确的方向：

mMediaRecorder.setOrientationHint(90);该方法在prepare()之前调用。