关于同一主题有很多问题，但是没有一个问题能为我提供我需要的答案。我已经尝试了很多解决方案，到目前为止，它们都没有为我工作。
我试图用我的fragment使用Android的相机拍照并从画廊拍照时卡住了，因为我总是得到NullPointerException。这是我的代码，当用户点击按钮捕获或从galery拍照：
capture_dp.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
final Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
intent.putExtra(MediaStore.EXTRA_SCREEN_ORIENTATION, ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
intent.putExtra(MediaStore.EXTRA_OUTPUT, setImageUri());
startActivityForResult(intent, TAKE_PHOTO_CODE);
}
});
add_galery_dp[counter2].setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Intent i = new Intent(Intent.ACTION_PICK,android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(i,
PICK_FROM_GALLERY);
}
});
这是我的方法：
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == TAKE_PHOTO_CODE && data != null) {
selectedImagePath = getImagePath();
nama_foto[counter]=new File(path1,"foto"+GetTime.getCurrentDate("yyyyMMddhhmmss")+".jpg");
FileOutputStream fos = null;
if(! nama_foto[counter].exists())
{
try {
Bitmap bitmap= rotateBitmap(selectedImagePath);
// nama_foto[counter].createNewFile();
// copyFile(new File(selectedImagePath), nama_foto[counter]); //untuk copy file dari selected image path ke nama_foto
fos = new FileOutputStream( nama_foto[counter]);
bitmap.compress(Bitmap.CompressFormat.JPEG, 70, fos);
fos.flush();
fos.close();
// MediaStore.Images.Media.insertImage(getActivity().getContentResolver(), bitmap, "Screen", "screen");
} catch (FileNotFoundException e) {
throw new RuntimeException(e);
} catch (IOException e) {
e.printStackTrace();
}
}
foto_dp[counter].setImageBitmap(rotateBitmap(selectedImagePath));
}
else if (requestCode == PICK_FROM_GALLERY&& data != null) {
Uri selectedImageUri = data.getData();
selectedImagePath = getPath(selectedImageUri);
System.out.println("Image Path : " + selectedImagePath);
// File photo = new File(selectedImagePath);
nama_foto[counter]=new File(path1,"foto"+GetTime.getCurrentDate("yyyyMMddhhmmss")+".jpg");
FileOutputStream fos = null;
if(! nama_foto[counter].exists())
{
try {
// nama_foto[counter].createNewFile();
//// foto_dp[counter].setImageBitmap(resizeimage(selectedImagePath));
// rotateBitmap(selectedImagePath);
// copyFile(new File(selectedImagePath), nama_foto[counter]);
Bitmap bitmap= rotateBitmap(selectedImagePath);
fos = new FileOutputStream( nama_foto[counter]);
bitmap.compress(Bitmap.CompressFormat.JPEG, 70, fos);
fos.flush();
fos.close();
// MediaStore.Images.Media.insertImage(getActivity().getContentResolver(), bitmap, "Screen", "screen");
} catch (FileNotFoundException e) {
throw new RuntimeException(e);
} catch (IOException e) {
e.printStackTrace();
}
}
foto_dp[counter].setImageBitmap(rotateBitmap(selectedImagePath));
}
else{
}
}
public String getPath(Uri uri) {
String[] projection = { MediaStore.Images.Media.DATA };
Cursor cursor = getActivity().managedQuery(uri, projection, null, null, null);
int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
return cursor.getString(column_index);
}
//Method camera
public Uri setImageUri() {
FileOutputStream out = null;
// Store image in dcim
nama_foto[counter] = new File(Environment.getExternalStorageDirectory() +"/android/data/ESPAJ/spaj_foto/"+GetTime.getCurrentDate("yyyyMMddhhmmss")+".jpg");
Uri imgUri = Uri.fromFile(nama_foto[counter]);
this.imgPath = nama_foto[counter].getAbsolutePath();
return imgUri;
}
public String getImagePath() {
// Log.i("tes", imgPath);
return imgPath;
}
//resize
public Bitmap resizeimage(String path) throws FileNotFoundException {
FileInputStream ostream = null;
try {
ostream = new FileInputStream(path);
BitmapFactory.Options options = new BitmapFactory.Options();
options.inSampleSize = 1; //subsampling
int compress = 20;
BitmapFactory.decodeStream(ostream, null, options).compress(CompressFormat.JPEG, compress, new FileOutputStream(path));
// return BitmapFactory.decodeFile(path, o2);
} catch (FileNotFoundException e) {
e.printStackTrace();
}
return null;
}
//decode memory image
public static Bitmap decodeFile(String path) {
try {
// Decode image size
BitmapFactory.Options o = new BitmapFactory.Options();
o.inJustDecodeBounds = true;
BitmapFactory.decodeFile(path, o);
// The new size we want to scale to
final int REQUIRED_SIZE = 250;
// Find the correct scale value. It should be the power of 2.
int scale = 4;
while (o.outWidth / scale / 2 >= REQUIRED_SIZE && o.outHeight / scale / 2 >= REQUIRED_SIZE)
scale *= 2;
// Decode with inSampleSize
BitmapFactory.Options o2 = new BitmapFactory.Options();
o2.inSampleSize = scale;
return BitmapFactory.decodeFile(path, o2);
} catch (Throwable e) {
e.printStackTrace();
}
return null;
}
这是我拍摄照片时的logcat历史记录：
11-05 13:53:15.778: E/AndroidRuntime(11152): FATAL EXCEPTION: main
11-05 13:53:15.778: E/AndroidRuntime(11152): java.lang.RuntimeException: Unable to resume activity {id.co.ajsmsig.espaj/id.co.ajsmsig.espaj.Menu_SPPAJ}: java.lang.RuntimeException: Failure delivering result ResultInfo{who=android:fragment:9, request=0, result=-1, data=null} to activity {id.co.ajsmsig.espaj/id.co.ajsmsig.espaj.Menu_SPPAJ}: java.lang.NullPointerException
11-05 13:53:15.778: E/AndroidRuntime(11152): at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2613)
11-05 13:53:15.778: E/AndroidRuntime(11152): at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:2641)
11-05 13:53:15.778: E/AndroidRuntime(11152): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2127)
11-05 13:53:15.778: E/AndroidRuntime(11152): at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:3550)
11-05 13:53:15.778: E/AndroidRuntime(11152): at android.app.ActivityThread.access$700(ActivityThread.java:140)
11-05 13:53:15.778: E/AndroidRuntime(11152): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
11-05 13:53:15.778: E/AndroidRuntime(11152): at android.os.Handler.dispatchMessage(Handler.java:99)
11-05 13:53:15.778: E/AndroidRuntime(11152): at android.os.Looper.loop(Looper.java:137)
11-05 13:53:15.778: E/AndroidRuntime(11152): at android.app.ActivityThread.main(ActivityThread.java:4895)
11-05 13:53:15.778: E/AndroidRuntime(11152): at java.lang.reflect.Method.invokeNative(Native Method)
11-05 13:53:15.778: E/AndroidRuntime(11152): at java.lang.reflect.Method.invoke(Method.java:511)
11-05 13:53:15.778: E/AndroidRuntime(11152): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:994)
11-05 13:53:15.778: E/AndroidRuntime(11152): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:761)
11-05 13:53:15.778: E/AndroidRuntime(11152): at dalvik.system.NativeStart.main(Native Method)
11-05 13:53:15.778: E/AndroidRuntime(11152): Caused by: java.lang.RuntimeException: Failure delivering result ResultInfo{who=android:fragment:9, request=0, result=-1, data=null} to activity {id.co.ajsmsig.espaj/id.co.ajsmsig.espaj.Menu_SPPAJ}: java.lang.NullPointerException
11-05 13:53:15.778: E/AndroidRuntime(11152): at android.app.ActivityThread.deliverResults(ActivityThread.java:3179)
11-05 13:53:15.778: E/AndroidRuntime(11152): at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2600)
11-05 13:53:15.778: E/AndroidRuntime(11152): ... 13 more
11-05 13:53:15.778: E/AndroidRuntime(11152): Caused by: java.lang.NullPointerException
11-05 13:53:15.778: E/AndroidRuntime(11152): at id.co.ajsmsig.espaj.DokumenPendukung.rotateBitmap(DokumenPendukung.java:794)
11-05 13:53:15.778: E/AndroidRuntime(11152): at id.co.ajsmsig.espaj.DokumenPendukung.onActivityResult(DokumenPendukung.java:734)
11-05 13:53:15.778: E/AndroidRuntime(11152): at android.app.Activity.dispatchActivityResult(Activity.java:5351)
11-05 13:53:15.778: E/AndroidRuntime(11152): at android.app.ActivityThread.deliverResults(ActivityThread.java:3175)
11-05 13:53:15.778: E/AndroidRuntime(11152): ... 14 more
这是我从相机拍照时的logcat历史记录：
11-05 15:48:13.578: E/AndroidRuntime(14633): java.lang.RuntimeException: Failure delivering result ResultInfo{who=android:fragment:1, request=1, result=-1, data=Intent { dat=content://media/external/images/media/22 (has extras) }} to activity {id.co.ajsmsig.espaj/id.co.ajsmsig.espaj.Menu_SPPAJ}: java.lang.NullPointerException
我希望有人可以帮助我解决我的问题。非常感谢你。