我无法找到问题无法恢复活动的根本原因。我做错了什么，一旦我在从图库中选择和从相机中选择之间进行随机选择，我的应用程序就会崩溃:(
编辑：完整的logcat：
04-05 12:30:07.479: W/IInputConnectionWrapper(17228): showStatusIcon on inactive InputConnection
04-05 12:30:17.109: I/RotateImage(17228): Exif orientation: 6
04-05 12:30:17.109: I/RotateImage(17228): Rotate value: 90
04-05 12:30:20.139: E/Swiss Insignia(17228): width=1920
04-05 12:30:20.139: E/Swiss Insignia(17228): height=2560
04-05 12:30:21.609: I/System.out(17228): str1=L@**
04-05 12:30:31.229: I/RotateImage(17228): Exif orientation: 6
04-05 12:30:31.229: I/RotateImage(17228): Rotate value: 90
04-05 12:30:33.949: E/Swiss Insignia(17228): width=1920
04-05 12:30:33.949: E/Swiss Insignia(17228): height=2560
04-05 12:30:35.089: I/System.out(17228): str2=L@**
04-05 12:30:37.909: W/IInputConnectionWrapper(17228): showStatusIcon on inactive InputConnection
04-05 12:30:45.829: I/Swiss Insignia(17456): Trying to load OpenCV library
04-05 12:30:45.889: D/SKIA_FONT(17456): load_system_fonts(), name = Roboto, style = 0, uniqueID = 1
04-05 12:30:45.889: D/SKIA_FONT(17456): load_system_fonts(), name = Roboto, style = 1, uniqueID = 2
04-05 12:30:45.889: D/SKIA_FONT(17456): load_system_fonts(), name = Droid Serif, style = 0, uniqueID = 3
04-05 12:30:45.889: D/SKIA_FONT(17456): load_system_fonts(), name = Droid Serif, style = 1, uniqueID = 4
04-05 12:30:45.889: D/SKIA_FONT(17456): load_system_fonts(), name = Droid Serif, style = 2, uniqueID = 5
04-05 12:30:45.899: D/SKIA_FONT(17456): load_system_fonts(), name = Droid Serif, style = 3, uniqueID = 6
04-05 12:30:45.899: D/SKIA_FONT(17456): load_system_fonts(), name = Droid Sans Mono, style = 0, uniqueID = 7
04-05 12:30:45.909: D/SKIA_FONT(17456): load_system_fonts(), name = Droid Sans Arabic, style = 0, uniqueID = 8
04-05 12:30:45.909: D/SKIA_FONT(17456): load_system_fonts(), name = Droid Sans Hebrew, style = 0, uniqueID = 9
04-05 12:30:45.909: D/SKIA_FONT(17456): load_system_fonts(), name = SamsungArmenian, style = 0, uniqueID = 10
04-05 12:30:45.909: D/SKIA_FONT(17456): load_system_fonts(), name = SamsungGeorgian, style = 0, uniqueID = 11
04-05 12:30:45.909: D/SKIA_FONT(17456): load_system_fonts(), name = Droid Sans Thai, style = 0, uniqueID = 12
04-05 12:30:45.909: D/SKIA_FONT(17456): load_system_fonts(), name = HelveM_Telugu, style = 0, uniqueID = 13
04-05 12:30:45.909: D/SKIA_FONT(17456): load_system_fonts(), name = Droid Sans Fallback, style = 0, uniqueID = 14
04-05 12:30:45.919: D/SKIA_FONT(17456): load_system_fonts(), oldSansUID = 0, newSansUID = 1
04-05 12:30:45.919: D/SKIA_FONT(17456): load_system_fonts(), oldSansBoldUID = 0, newSansBoldUID = 2
04-05 12:30:45.969: W/dalvikvm(17456): threadid=1: thread exiting with uncaught exception (group=0x40018578)
04-05 12:30:45.989: E/AndroidRuntime(17456): FATAL EXCEPTION: main
04-05 12:30:45.989: E/AndroidRuntime(17456): java.lang.RuntimeException: Unable to resume activity {.MainActivity}: java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=1, result=-1, data=null} to activity {.MainActivity}: java.lang.NullPointerException
04-05 12:30:45.989: E/AndroidRuntime(17456): at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2124)
04-05 12:30:45.989: E/AndroidRuntime(17456): at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:2139)
04-05 12:30:45.989: E/AndroidRuntime(17456): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1672)
04-05 12:30:45.989: E/AndroidRuntime(17456): at android.app.ActivityThread.access$1500(ActivityThread.java:117)
04-05 12:30:45.989: E/AndroidRuntime(17456): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:935)
04-05 12:30:45.989: E/AndroidRuntime(17456): at android.os.Handler.dispatchMessage(Handler.java:99)
04-05 12:30:45.989: E/AndroidRuntime(17456): at android.os.Looper.loop(Looper.java:130)
04-05 12:30:45.989: E/AndroidRuntime(17456): at android.app.ActivityThread.main(ActivityThread.java:3687)
04-05 12:30:45.989: E/AndroidRuntime(17456): at java.lang.reflect.Method.invokeNative(Native Method)
04-05 12:30:45.989: E/AndroidRuntime(17456): at java.lang.reflect.Method.invoke(Method.java:507)
04-05 12:30:45.989: E/AndroidRuntime(17456): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:867)
04-05 12:30:45.989: E/AndroidRuntime(17456): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:625)
04-05 12:30:45.989: E/AndroidRuntime(17456): at dalvik.system.NativeStart.main(Native Method)
04-05 12:30:45.989: E/AndroidRuntime(17456): Caused by: java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=1, result=-1, data=null} to activity {.MainActivity}: java.lang.NullPointerException
04-05 12:30:45.989: E/AndroidRuntime(17456): at android.app.ActivityThread.deliverResults(ActivityThread.java:2536)
04-05 12:30:45.989: E/AndroidRuntime(17456): at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2111)
04-05 12:30:45.989: E/AndroidRuntime(17456): ... 12 more
04-05 12:30:45.989: E/AndroidRuntime(17456): Caused by: java.lang.NullPointerException
04-05 12:30:45.989: E/AndroidRuntime(17456): at .onActivityResult(MainActivity.java:101)
04-05 12:30:45.989: E/AndroidRuntime(17456): at android.app.Activity.dispatchActivityResult(Activity.java:3908)
04-05 12:30:45.989: E/AndroidRuntime(17456): at android.app.ActivityThread.deliverResults(ActivityThread.java:2532)
04-05 12:30:45.989: E/AndroidRuntime(17456): ... 13 more
代码：
public class MainActivity extends Activity
{
private static final int PICK_FROM_CAMERA = 1;
private static final int PICK_FROM_GALLERY = 2;
final String TAG = "Swiss Insignia";
ImageView imgview;
TextView output;
Button buttonCamera;
Button buttonGallery;
File destImage;
private BaseLoaderCallback mOpenCVCallBack = new BaseLoaderCallback(this)
{@Override
public void onManagerConnected(int status)
{
switch (status)
{
case LoaderCallbackInterface.SUCCESS:
{
Log.i(TAG, "opencv loaded successfully");
// Create and set View
System.loadLibrary("SwissInsignia");
Log.i(TAG, "libSwissInsignia.so loaded successfully");
} break;
default:
{
super.onManagerConnected(status);
} break;
}
}
};@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
Log.i(TAG, "Trying to load OpenCV library");
if (!OpenCVLoader.initAsync(OpenCVLoader.OPENCV_VERSION_2_4_2, this, mOpenCVCallBack))
{
Log.e(TAG, "Cannot connect to OpenCV Manager");
}
setContentView(R.layout.activity_main);
imgview = (ImageView) findViewById(R.id.imageView1);
output = (TextView)findViewById(R.id.textViewOutput);
buttonCamera = (Button) findViewById(R.id.btn_take_camera);
buttonGallery = (Button) findViewById(R.id.btn_select_gallery);
buttonCamera.setOnClickListener(new View.OnClickListener()
{
public void onClick(View v)
{
Intent intent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
File dir = new File(Environment.getExternalStorageDirectory().getAbsolutePath(), "SwissInsignia");
if (!dir.isDirectory())
{
dir.mkdir();
}
destImage = new File(dir, new Date().getTime() + ".jpg");
intent.putExtra(MediaStore.EXTRA_OUTPUT,Uri.fromFile(destImage));
startActivityForResult(intent, PICK_FROM_CAMERA);
}
});
buttonGallery.setOnClickListener(new View.OnClickListener()
{
public void onClick(View v)
{
Intent photoPickerIntent = new Intent(Intent.ACTION_GET_CONTENT);
photoPickerIntent.setType("image/*");
startActivityForResult(photoPickerIntent, PICK_FROM_GALLERY);
}
});
}
protected void onActivityResult(int requestCode, int resultCode, Intent data)
{
if (requestCode == PICK_FROM_CAMERA)
{
File f = new File(destImage.getAbsolutePath());
int rotateImage = getCameraPhotoOrientation(this, Uri.parse(destImage.getAbsolutePath()), destImage.getAbsolutePath());
Bitmap photo= convertBitmapToCorrectOrientation( BitmapFactory.decodeFile(f.getAbsolutePath()), rotateImage);
//Bitmap photo = BitmapFactory.decodeFile(f.getAbsolutePath());
Log.e(TAG, "width="+photo.getWidth());
Log.e(TAG, "height="+photo.getHeight());
Mat mRgba=new Mat();
org.opencv.android.Utils.bitmapToMat(photo,mRgba);
String str1=findFeatures(mRgba.getNativeObjAddr());
System.out.println("str1="+str1);
imgview.setImageBitmap(photo);
output.setText("Detected Pattern="+str1);
}
if (requestCode == PICK_FROM_GALLERY)
{
Uri selectedImage = data.getData();
String[] filePathColumn = { MediaStore.Images.Media.DATA };
Cursor cursor = getContentResolver().query(selectedImage,filePathColumn, null, null, null);
cursor.moveToFirst();
int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
String picturePath = cursor.getString(columnIndex);
cursor.close();
int rotateImage = getCameraPhotoOrientation(this, selectedImage, picturePath);
Bitmap photo= convertBitmapToCorrectOrientation( BitmapFactory.decodeFile(picturePath), rotateImage);
Log.e(TAG, "width="+photo.getWidth());
Log.e(TAG, "height="+photo.getHeight());
Mat mRgba=new Mat();
org.opencv.android.Utils.bitmapToMat(photo,mRgba);
String str2=findFeatures(mRgba.getNativeObjAddr());
System.out.println("str2="+str2);
Bitmap mutableBitmap = photo.copy(Bitmap.Config.ARGB_8888, true);
imgview.setImageBitmap(mutableBitmap);
output.setText("Detected Pattern="+str2);
}
}
public static Bitmap convertBitmapToCorrectOrientation(Bitmap photo,int rotation)
{
int width = photo.getWidth();
int height = photo.getHeight();
Matrix matrix = new Matrix();
matrix.preRotate(rotation);
return Bitmap.createBitmap(photo, 0, 0, width, height, matrix, false);
}
public int getCameraPhotoOrientation(Context context, Uri imageUri, String imagePath)
{
int rotate = 0;
try
{
context.getContentResolver().notifyChange(imageUri, null);
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;
}
Log.i("RotateImage", "Exif orientation: " + orientation);
Log.i("RotateImage", "Rotate value: " + rotate);
}
catch (Exception e)
{
e.printStackTrace();
}
return rotate;
}
public static native String findFeatures( long matAddrRgba);
}