Question

我正在使用此代码在Android应用程序中打开一个库。

Intent intent = new Intent(Intent.ACTION_PICK, Media.EXTERNAL_CONTENT_URI);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivityForResult(intent, GALLERY);

它会打开图库但是当我从那里选择任何图像时它也会关闭，但不会被称为onActivityResult方法。

方法就在这里......

protected void onActivityResult(int requestCode, int resultCode, Intent data) {     


    Log.v(TAG, "requestCode = "+requestCode+" resultCode = "+resultCode);
    Log.v(TAG, "inside onActivityResult");

    if (requestCode == GALLERY || requestCode == CAMERA) {
        if (resultCode == RESULT_OK) 
        {
            Log.v(TAG, "inside onActivityResult OK ");
            Log.v("log_tag", "onactivity result: " + requestCode);
            if(requestCode == CAMERA)
            {
                Log.v(TAG, "inside onActivityResult Camera");
                 file = getTempFile(this.getParent());  
                 try {  
                    m_bmOCRBitmap = Media.getBitmap(getContentResolver(), Uri.fromFile(file) );

                    FileOutputStream out = new FileOutputStream(file);

                    int width = m_bmOCRBitmap.getWidth();
                    int height = m_bmOCRBitmap.getHeight();
                    if(width>height)
                    {
                        calwidth = (int)((width * 250)/height);
                        calheight = 250;
                    }
                    else
                    {
                        calheight = (int)((height * 200)/width);
                        calwidth = 200;
                    }

                    Log.v(TAG, "calwidth = "+calwidth+" calheight = "+calheight);
                    bitmap = Bitmap.createScaledBitmap(m_bmOCRBitmap, calwidth, calheight, true);                                                                   

                    bitmap.compress(Bitmap.CompressFormat.JPEG, 100, out);
                    productImage.setImageBitmap(bitmap);

                    } catch (FileNotFoundException e) {  
                      e.printStackTrace();  
                    } catch (IOException e) {  
                      e.printStackTrace();  
                    }  
            }
            else if(requestCode == GALLERY)
            {
                Log.v(TAG, "inside onActivityResult GALARY ");
                String selectedImagePath = getPath(data.getData());
                file = new File(selectedImagePath);                                     
                m_bmOCRBitmap = BitmapFactory.decodeFile(selectedImagePath);
                Log.v("log_tag", "selectedImagePath:" + selectedImagePath + ":" );
                Log.v("log", "first image : "+m_bmOCRBitmap);
                try {
                    FileOutputStream out = new FileOutputStream(file);
                    int width = m_bmOCRBitmap.getWidth();
                    int height = m_bmOCRBitmap.getHeight();
                    if(width>height)
                    {
                        calwidth = (int)((width * 250)/height);
                        calheight = 250;
                    }
                    else
                    {
                        calheight = (int)((height * 200)/width);
                        calwidth = 200;
                    }
                    bitmap = Bitmap.createScaledBitmap(m_bmOCRBitmap, calwidth, calheight, true);                                                                   

                    bitmap.compress(Bitmap.CompressFormat.JPEG, 100, out);
                    productImage.setImageBitmap(bitmap);

                } catch (Exception e) {
                    Log.v("log_tag", "Exception: " + e.toString());
                }
            }                           
        }
    }       
    super.onActivityResult(requestCode, resultCode, data);
}

调用Intent时的警告

01-04 12:21:06.434: D/PhoneWindow(367): couldn't save which view has focus because the focused view com.android.internal.policy.impl.PhoneWindow$DecorView@4054fb60 has no id.

请注意，我已将此活动作为Tabgoup活动中的子活动开始。

请建议我。感谢。

Answer 1

onActivityResult()未触发的可能性很多。

如果您的请求代码是＆lt; 0
如果您设置了android:launchMode="singleInstance" 的manifest.xml
如果您正在使用片段，则必须调用片段 startActivityOnResult代替活动

Answer 2

我在此类

中添加了此类方法

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    ProductImageActivity activity = (ProductImageActivity)getLocalActivityManager().getCurrentActivity();
    try {
        activity.onActivityResult(requestCode, resultCode, data,0);
    } catch (Exception e) {
        e.printStackTrace();
    }
}

在我目前的课程中，我开始了这样的新意图。

Intent intent = new Intent(Intent.ACTION_PICK, Media.EXTERNAL_CONTENT_URI);
getParent().startActivityForResult(intent, GALLERY);

Answer 3

检查http://developer.android.com/reference/android/content/Intent.html#FLAG_ACTIVITY_NEW_TASK以了解Intent.FLAG_ACTIVITY_NEW_TASK的行为。它用于独立活动。

This flag is generally used by activities that want to present a "launcher" style      behavior: they give the user a list of separate things that can be done, which otherwise run completely independently of the activity launching them.

删除该行后，一旦选择了图像，就会调用onActivityResult。

    Intent intent = new Intent(Intent.ACTION_PICK, Media.EXTERNAL_CONTENT_URI);
    startActivityForResult(intent, GALLERY);

Answer 4

试试这个＆amp;使用Intent像这样从Gallery

获取图像

        Intent intent = new Intent(Intent.ACTION_PICK);
        intent.setType("image/*");
        startActivityForResult(intent, GALLERY);

或者

           Intent intent = new Intent(Intent.ACTION_PICK,
                    android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
        startActivityForResult(intent, GALLERY);

onactivityresult在android中使用Gallery时没有被调用

4 个答案: