未调用startActivityForResult（）

Question

我是Android新手，我正在写一个相册应用。我正在尝试从用户那里获取图像并将其存储在相册中。以下是我的AlbumOptions活动中的代码段：

public void add(View v){
    Intent i = new Intent(Intent.ACTION_PICK,
            android.provider.MediaStore.Images.Media.INTERNAL_CONTENT_URI);
    startActivityForResult(Intent.createChooser(i, "Choose Photo To Add"),RESULT_LOAD_IMAGE);
}

@Override
public void onActivityResult(int requestCode, int resultCode, Intent data){
    super.onActivityResult(requestCode, resultCode, data);

    if (requestCode == RESULT_LOAD_IMAGE && resultCode == RESULT_OK && data != null)
    {
        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]);
        final String picturePath = cursor.getString(columnIndex);
        cursor.close();

        //get a name for the photo
        final EditText pName = new EditText(this);
        new AlertDialog.Builder(this)
                .setTitle("Create Album")
                .setMessage("Enter album name:")
                .setView(pName)
                .setPositiveButton("Add Photo", new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int whichButton) {
                        String name = pName.getText().toString();

                        //check if photo name already exists, if not create it
                        if(!album.checkName(name))
                        {
                            Photo p = new Photo(name, picturePath, "");
                            photoList.add(p);
                            adapter.notifyDataSetChanged();
                        }
                        //prompt error that photo name is taken
                        else
                        {
                            AlertDialog alertDialog = new AlertDialog.Builder(AlbumOptions.this).create();
                            alertDialog.setTitle("Error");
                            alertDialog.setMessage("Photo name already exists!");
                            alertDialog.setButton(AlertDialog.BUTTON_NEUTRAL, "OK",
                                    new DialogInterface.OnClickListener() {
                                        public void onClick(DialogInterface dialog, int which) {
                                            dialog.dismiss();
                                        }
                                    });
                            alertDialog.show();
                        }
                    }
                });

    }
}

当用户单击添加按钮以将照片添加到打开的相册时，将调用add方法。但是，使用调试工具时，程序将通过startActivityForResult()调用。我查看了各种帖子，看看出了什么问题，我无法弄清楚出了什么问题。 RESULT_LOAD_IMAGE是＆gt; 0，我按照我见过的许多帖子的建议检查了我的清单文件。任何反馈都表示赞赏。

Answer 1

尝试此代码。这可能会对您有所帮助。

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if(requestCode==SELECT_IMAGE){
        if(resultCode==RESULT_OK && null!=data){
              //do whatever you want.
          }
    }

首先将@Override public更改为@Override protected。并设置了这个。

   Intent image=new Intent();
   image.setType("image/*");
   image.setAction(Intent.ACTION_GET_CONTENT);
   startActivityForResult(Intent.createChooser(image,"select file"),SELECT_IMAGE);

更改此行。您已指出RESULT_LOAD_IMAGE为＆gt; 0，将其更改为= 0;

public int SELECT_IMAGE=0;