Java &引用；“无法恢复活动”；保存裁剪后的图像-Android

剪切图像后，我想在ImageView中加载图像并保存它。但当它恢复时会崩溃，但图像会保存在选定的位置。我认为问题在于selectedImageUri。但我不知道该怎么解决。请找个人帮忙。提前谢谢

代码：

public class CatFragment extends Fragment implements OnClickListener{

            private DBCreater dbCreate;

            private static final int SELECT_PICTURE = 1;

            private String selectedImagePath = "android.resource://com.example.abcd/" + R.drawable.pets;
            private ImageView img;
            //private Button imgBtn;

            private Uri mCropImagedUri;

            @Override
            public View onCreateView(LayoutInflater inflater, ViewGroup container,
                    Bundle savedInstanceState) {
                View gv = inflater.inflate(R.layout.new_pet, null);

                Spinner sp = (Spinner) gv.findViewById(R.id.ETPetType); 
                // get reference 
                sp.setAdapter(new ArrayAdapter<String>(getActivity().getBaseContext(), android.R.layout.simple_spinner_dropdown_item, petType));

                Button btnSubmit = (Button) gv.findViewById(R.id.ButtonNext);
                btnSubmit.setOnClickListener(this);

                img = (ImageView)gv.findViewById(R.id.ImageView01);
            ((Button) gv.findViewById(R.id.ETPetImg))
                            .setOnClickListener(new OnClickListener() {
                                public void onClick(View arg0) {
                                    try {
                                        Intent intent = new Intent();
                                        intent.setType("image/*");
                                        intent.setAction(Intent.ACTION_GET_CONTENT);
                                        intent.putExtra("crop", "true");
                                        intent.putExtra("aspectX", 0);
                                        intent.putExtra("aspectY", 0);
                                        intent.putExtra("outputX", 200);
                                        intent.putExtra("outputY", 200);
                                        intent.putExtra("return-data", false);

                                        File f = createNewFile("CROP_");
                                        try {
                                            f.createNewFile();
                                        } catch (IOException ex) {
                                            Log.e("io", ex.getMessage());
                                        }

                                        mCropImagedUri = Uri.fromFile(f);
                                        intent.putExtra(MediaStore.EXTRA_OUTPUT,
                                                mCropImagedUri);
                                        // start the activity - we handle returning in
                                        // onActivityResult
                                        startActivityForResult(intent, SELECT_PICTURE);
                                                                } catch (ActivityNotFoundException anfe) {
                                        // display an error message

                                    }
                                }
                            });

                    return gv;

                }


                private File createNewFile(String prefix){
                    if(prefix==null || "".equalsIgnoreCase(prefix)){
                        prefix="IMG_";
                    }
                    File newDirectory = new File(Environment.getExternalStorageDirectory()+"/test1/");
                    if(!newDirectory.exists()){
                        if(newDirectory.mkdir()){
                            Log.d(this.getClass().getName(), newDirectory.getAbsolutePath()+" directory created");
                        }
                    }
                    File file = new File(newDirectory,(prefix+System.currentTimeMillis()+".jpg"));
                    if(file.exists()){
                        //this wont be executed
                        file.delete();
                        try {
                            file.createNewFile();
                        } catch (IOException e) {
                            e.printStackTrace();
                        }
                    }

                    return file;
                }


                public void onActivityResult(int requestCode, int resultCode, Intent data) {
                    if (resultCode == Activity.RESULT_OK) {
                        if (requestCode == SELECT_PICTURE) {
                            Uri selectedImageUri = data.getData();
                            selectedImagePath = getPath(selectedImageUri); //To get image path
                            System.out.println("Image Path : " + selectedImagePath);
                            img.setImageURI(selectedImageUri);


                        }
                    }
                }

    public String getPath(Uri uri) {
            String[] projection = { MediaStore.Images.Media.DATA };
            //Cursor cursor = managedQuery(uri, projection, null, null, null);
            Cursor cursor = getActivity().getContentResolver().query(uri, projection, null, null, null);
            int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
            cursor.moveToFirst();
            return cursor.getString(column_index);
        }

        @Override
        public void onActivityCreated(Bundle savedInstanceState) {
            super.onActivityCreated(savedInstanceState);
            //access the database
            dbCreate = new DBCreater(getActivity());

        }



        @Override
        public void onClick(View v) {
            displayNextAlert();

        }

编辑：

我对ActivityResult（）进行了如下更改：

if(data!=null) { 
                     Bitmap thePic = (Bitmap) data.getExtras().get("data");
                     SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(getActivity().getBaseContext());
                     String filename = preferences.getString("file_name", ""); // value to retrieve
                     String path = Environment.getExternalStorageDirectory()+"/PetSitter/Pet Images/" + filename;
                     img.setImageURI(Uri.parse(path.toString()));
                     } else {
                     // In createNewFile, make sure you already saved the filename (prefix+System.currentTimeMillis()+".jpg"), for example, to sharedpreferences then get the filename and apply in path 
                     SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(getActivity().getBaseContext());
                     String filename = preferences.getString("file_name", ""); // value to retrieve
                     String path = Environment.getExternalStorageDirectory()+"/PetSitter/Pet Images/" + filename;
                     BitmapFactory.Options bfo = new BitmapFactory.Options();
                     bfo.inSampleSize = 1;
                     Bitmap bmp = BitmapFactory.decodeFile(path, bfo);
                     img.setImageBitmap(bmp);
                    }

if(data!=null) { 
                     Bitmap thePic = (Bitmap) data.getExtras().get("data");
                     SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(getActivity().getBaseContext());
                     String filename = preferences.getString("file_name", ""); // value to retrieve
                     String path = Environment.getExternalStorageDirectory()+"/PetSitter/Pet Images/" + filename;
                     img.setImageURI(Uri.parse(path.toString()));
                     } else {
                     // In createNewFile, make sure you already saved the filename (prefix+System.currentTimeMillis()+".jpg"), for example, to sharedpreferences then get the filename and apply in path 
                     SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(getActivity().getBaseContext());
                     String filename = preferences.getString("file_name", ""); // value to retrieve
                     String path = Environment.getExternalStorageDirectory()+"/PetSitter/Pet Images/" + filename;
                     BitmapFactory.Options bfo = new BitmapFactory.Options();
                     bfo.inSampleSize = 1;
                     Bitmap bmp = BitmapFactory.decodeFile(path, bfo);
                     img.setImageBitmap(bmp);
                    }

它似乎是与图像预览和一切工作。但你要做什么呢？这是一个好的做法吗？像这样使用会如何使用内存

Uri selectedImageURI = data.getData();
imageFile = new File(getRealPathFromURI(selectedImageURI));

及

---

在ActivityResult的

中尝试此操作

Bitmap photo = (Bitmap) data.getExtras().get("data"); 
                img.setImageBitmap(photo);

在OnActivityResult（）中：

在createNewFile中

                private File createNewFile(String prefix){
                        if(prefix==null || "".equalsIgnoreCase(prefix)){
                            prefix="IMG_";
                        }
                        File newDirectory = new File(Environment.getExternalStorageDirectory()+"/test1/");
                        if(!newDirectory.exists()){
                            if(newDirectory.mkdir()){
                                Log.d(this.getClass().getName(), newDirectory.getAbsolutePath()+" directory created");
                            }
                        }
    // modifications applied here
    long mDate = System.currentTimeMillis();
                        File file = new File(newDirectory,(prefix+mDate+".jpg"));
String filename = prefix+mDate+".jpg";
SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(getActivity().getBaseContext());
SharedPreferences.Editor editor = preferences.edit();
editor.putString("file_name", filename); // value to store
editor.commit();
                        if(file.exists()){
                            //this wont be executed
                            file.delete();
                            try {
                                file.createNewFile();
                            } catch (IOException e) {
                                e.printStackTrace();
                            }
                        }

                        return file;
                    }

我对ActivityResult（）进行了如下更改：

if(data!=null) { 
                     Bitmap thePic = (Bitmap) data.getExtras().get("data");
                     SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(getActivity().getBaseContext());
                     String filename = preferences.getString("file_name", ""); // value to retrieve
                     String path = Environment.getExternalStorageDirectory()+"/PetSitter/Pet Images/" + filename;
                     img.setImageURI(Uri.parse(path.toString()));
                     } else {
                     // In createNewFile, make sure you already saved the filename (prefix+System.currentTimeMillis()+".jpg"), for example, to sharedpreferences then get the filename and apply in path 
                     SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(getActivity().getBaseContext());
                     String filename = preferences.getString("file_name", ""); // value to retrieve
                     String path = Environment.getExternalStorageDirectory()+"/PetSitter/Pet Images/" + filename;
                     BitmapFactory.Options bfo = new BitmapFactory.Options();
                     bfo.inSampleSize = 1;
                     Bitmap bmp = BitmapFactory.decodeFile(path, bfo);
                     img.setImageBitmap(bmp);
                    }

if(data!=null) { 
                     Bitmap thePic = (Bitmap) data.getExtras().get("data");
                     SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(getActivity().getBaseContext());
                     String filename = preferences.getString("file_name", ""); // value to retrieve
                     String path = Environment.getExternalStorageDirectory()+"/PetSitter/Pet Images/" + filename;
                     img.setImageURI(Uri.parse(path.toString()));
                     } else {
                     // In createNewFile, make sure you already saved the filename (prefix+System.currentTimeMillis()+".jpg"), for example, to sharedpreferences then get the filename and apply in path 
                     SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(getActivity().getBaseContext());
                     String filename = preferences.getString("file_name", ""); // value to retrieve
                     String path = Environment.getExternalStorageDirectory()+"/PetSitter/Pet Images/" + filename;
                     BitmapFactory.Options bfo = new BitmapFactory.Options();
                     bfo.inSampleSize = 1;
                     Bitmap bmp = BitmapFactory.decodeFile(path, bfo);
                     img.setImageBitmap(bmp);
                    }

它似乎正在处理图像预览和所有内容。
在“getContentResolver（）”上出现错误，以及如何将“File”设置为“ImageView”（我指的是imageFile）？现在我遇到了这个错误：'11-15 13:48:46.351:E/AndroidRuntime（19350）：java.lang.RuntimeException:无法传递结果信息{who=android:fragment:0，request=1，result=-1，data=Intent{（有额外的）}}到活动{com.example.abcd/com.example.abcd.main活动}:java.lang.NullPointerException'Thx。但是现在我得到了这个错误：'11-15 13:48:46.351:E/AndroidRuntime（19350）：java.lang.RuntimeException:传递结果失败ResultInfo{who=android:fragment:0，request=1，result=-1，data=Intent{（有额外功能）}}到活动{com.example.abcd/com.example.abcd.MainActivity}:java.lang.NullPointerException'您正在使用片段，因此活动处于丢失状态。请参考此链接和Thx，但我如何实现它？确定添加super.onActivityResult（requestCode、resultCode、data）；作为onActivityResultI的第一行，我刚刚在下面发布了我的答案“文件文件=新文件（新目录，（前缀+System.currentTimeMillis（）+”.jpg”）；“在“createNewFile（字符串前缀）”中”。我如何在这里调用？我使用了“selectedImagePath=mCropImagedUri.getPath（）；//获取图像路径'以获取文件名。但它没有显示在ImageView中。我使用的方法是正确的？否-您需要使用SharedReferences或temp数据库获取文件名，因为您在文件名中使用system.currenttimemillis。您知道如何将文件名保存到SharedReferences吗？不知道我如何实现请参阅上面编辑的答案-如何使用SharedReferences
if(data!=null) { 
                     Bitmap thePic = (Bitmap) data.getExtras().get("data");
                     SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(getActivity().getBaseContext());
                     String filename = preferences.getString("file_name", ""); // value to retrieve
                     String path = Environment.getExternalStorageDirectory()+"/PetSitter/Pet Images/" + filename;
                     img.setImageURI(Uri.parse(path.toString()));
                     } else {
                     // In createNewFile, make sure you already saved the filename (prefix+System.currentTimeMillis()+".jpg"), for example, to sharedpreferences then get the filename and apply in path 
                     SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(getActivity().getBaseContext());
                     String filename = preferences.getString("file_name", ""); // value to retrieve
                     String path = Environment.getExternalStorageDirectory()+"/PetSitter/Pet Images/" + filename;
                     BitmapFactory.Options bfo = new BitmapFactory.Options();
                     bfo.inSampleSize = 1;
                     Bitmap bmp = BitmapFactory.decodeFile(path, bfo);
                     img.setImageBitmap(bmp);
                    }