[英]App crashes when image from gallery gets selected
我的应用程序中的摄像头功能确实让我发狂!
我已经在应用程序中建立了摄像头功能,但是当我尝试从图库中选择图像时它崩溃了。
Bitmap photo;
private static final int RESULT_LOAD_IMAGE = 1;
private static final int REQUEST_IMAGE_CAPTURE = 2;
ImageView imageView;
private void activeTakePhoto() { // if select open camera
Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(takePictureIntent, REQUEST_IMAGE_CAPTURE);
}
private void activeGallery() { // if select choose from gallery
Intent intent = new Intent(Intent.ACTION_PICK,
android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(intent, RESULT_LOAD_IMAGE);
}
@Override
protected void onActivityResult(int requestCode, int resultCode,
Intent data) {
super.onActivityResult(requestCode, resultCode, data);
switch (requestCode) {
case RESULT_LOAD_IMAGE:
if (requestCode == RESULT_LOAD_IMAGE && resultCode == RESULT_OK & null != data) {
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();
Bitmap a = (BitmapFactory.decodeFile(picturePath));
photo = scaleBitmap(a, 200, 200);
imageView.setImageBitmap(photo);
//photo = decodeSampledBitmapFromUri(picturePath, 100, 20);
imageView.setImageBitmap(photo);
}
case REQUEST_IMAGE_CAPTURE:
Bitmap thumbnail = (Bitmap) data.getExtras().get("data");
ByteArrayOutputStream bytes = new ByteArrayOutputStream();
thumbnail.compress(Bitmap.CompressFormat.JPEG, 90, bytes);
//to generate random file name
String fileName = "tempimg.jpg";
try {
photo = (Bitmap) data.getExtras().get("data");
//captured image set in imageview
imageView.setImageBitmap(photo);
} catch (Exception e) {
e.printStackTrace();
}
}
}
如果我删除了activeTakePhoto()
和case REQUEST_IMAGE_CAPTURE:
之后的所有行,则所选图像可以显示在imageView
。
如果删除activeGallery()
所捕捉的图像可以在显示器imageView
。
但是 ,如果我使用我在此处发布的代码段(均为函数),则当我从带有logCat
错误的图库中选择图像时,它会崩溃
12-10 14:49:03.507 927-927/? E/HwSystemManager﹕ :ACTION_BATTERY_CHANGED pluged =2
12-10 14:49:07.020 19428-19428/? E/AndroidRuntime﹕ FATAL EXCEPTION: main
java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=1, result=-1, data=Intent { dat=content://media/external/images/media/832821 flg=0x1 }} to activity {com.example.project.myapplication/com.example.project.myapplication.GUI.AddMoreClaims}: java.lang.NullPointerException
at android.app.ActivityThread.deliverResults(ActivityThread.java:3579)
at android.app.ActivityThread.handleSendResult(ActivityThread.java:3622)
at android.app.ActivityThread.access$1100(ActivityThread.java:169)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1436)
这行是Bitmap thumbnail = (Bitmap) data.getExtras().get("data");
。 但是,当我选择捕获图像时,捕获的图像仍可以显示在imageView
。
你错过了休息; 在开关盒之间。
一旦中断,您将不会遇到异常,因为“ REQUEST_IMAGE_CAPTURE”情况不会发生
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