【发布时间】:2012-11-02 22:01:27
【问题描述】:
我正在创建一个 Android 应用程序,该应用程序利用相机拍照,然后根据用户输入将它们发送到服务器。我目前在相机意图方面遇到了一些问题。我的主要问题是:
获取的照片与拍摄位置相比似乎是旋转的。
当我尝试修复此旋转时,我收到 OutOfMemoryError
所以我主要需要确保图片的方向没有改变,并且我没有收到 OutOfMemoryError。
这里是使用相机Intent拍照的功能。
private void dispatchTakePictureIntent(int actionCode) {
Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
File f = new File(Environment.getExternalStorageDirectory(),"/ServerApp/test.jpg");
takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(f));
startActivityForResult(takePictureIntent, actionCode);
}
此函数用于旋转图像并将其保存在该旋转位置。
private void getRotate() {
String imagePath ="";
int rotate = 0;
File f = null;
try {
f = new File(Environment.getExternalStorageDirectory(),"/ServerApp/test.jpg");
imagePath = f.getAbsolutePath();
File imageFile = new File(imagePath);
ExifInterface exif = new ExifInterface(
imageFile.getAbsolutePath());
int orientation = exif.getAttributeInt(
ExifInterface.TAG_ORIENTATION,
ExifInterface.ORIENTATION_NORMAL);
switch (orientation) {
case ExifInterface.ORIENTATION_ROTATE_270:
rotate = 270;
break;
case ExifInterface.ORIENTATION_ROTATE_180:
rotate = 180;
break;
case ExifInterface.ORIENTATION_ROTATE_90:
rotate = 90;
break;
}
} catch (Exception e) {
e.printStackTrace();
}
Bitmap p = BitmapFactory.decodeFile(imagePath);
Matrix m = new Matrix();
m.setRotate(rotate);
Bitmap _bitmapScaled = Bitmap.createBitmap(p, 0, 0, p.getWidth()/2,p.getHeight(), m, false);
f.delete();
ByteArrayOutputStream bytes = new ByteArrayOutputStream();
_bitmapScaled.compress(Bitmap.CompressFormat.JPEG, 100, bytes);
//you can create a new file name "test.jpg" in sdcard folder.
File f1 = new File(Environment.getExternalStorageDirectory()
+ File.separator + "test.jpg");
try {
f1.createNewFile();
FileOutputStream fo = new FileOutputStream(f1);
fo.write(bytes.toByteArray());
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
//write the bytes in file
}
最后,这是我的 onActivityResult 方法:
protected void onActivityResult(int requestCode, int resultCode, Intent data){
getRotate();
File f = new File(Environment.getExternalStorageDirectory(),"/ServerApp/test.jpg");
mImageView.setImageBitmap(BitmapFactory.decodeFile(f.getAbsolutePath()));
}
我已经尝试解决这个问题很长时间了,如果我能得到一些帮助,我将不胜感激。谢谢!
【问题讨论】:
标签: android bitmap out-of-memory mediastore android-camera-intent