从 Android Intent 打开图库应用

Question

我正在寻找一种从意图打开 Android 画廊应用程序的方法。

我不想返回图片，而只是打开图库以允许用户使用它，就像他们从启动器中选择它一样 (View pictures/folders)。

我已尝试执行以下操作：

Intent intent = new Intent();  
intent.setAction(android.content.Intent.ACTION_GET_CONTENT);  
intent.setType("image/*");
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);

但是，这会导致应用程序在我选择图片后关闭（我知道这是因为ACTION_GET_CONTENT），但我只需要打开图库。

任何帮助都会很棒。

谢谢

Answer 1

这是你需要的：

ACTION_VIEW

将您的代码更改为：

Intent intent = new Intent();  
intent.setAction(android.content.Intent.ACTION_VIEW);  
intent.setType("image/*");
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);

Answer 2

我希望这会对你有所帮助。这段代码对我有用。

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

ResultCode 用于将所选图像更新到图库视图

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);

        if (cursor == null || cursor.getCount() < 1) {
            return; // no cursor or no record. DO YOUR ERROR HANDLING
        }

        cursor.moveToFirst();
        int columnIndex = cursor.getColumnIndex(filePathColumn[0]);

        if(columnIndex < 0) // no column index
            return; // DO YOUR ERROR HANDLING

        String picturePath = cursor.getString(columnIndex);

        cursor.close(); // close cursor

        photo = decodeFilePath(picturePath.toString());

        List<Bitmap> bitmap = new ArrayList<Bitmap>();
        bitmap.add(photo);
        ImageAdapter imageAdapter = new ImageAdapter(
                AddIncidentScreen.this, bitmap);
        imageAdapter.notifyDataSetChanged();
        newTagImage.setAdapter(imageAdapter);
    }

Answer 3

您可以使用以下意图打开图库：

public static final int RESULT_GALLERY = 0;

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

如果您想获取结果 URI 或做其他任何事情，请使用：

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

    switch (requestCode) {
    case QuestionEntryView.RESULT_GALLERY :
        if (null != data) {
            imageUri = data.getData();
            //Do whatever that you desire here. or leave this blank

        }
        break;
    default:
        break;
    }
}

在 Android 4.0+ 上测试

Answer 4

1. Following 可用于 Activity 或 Fragment。

    private File mCurrentPhoto;
   

2. 添加权限

   <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"  />
   <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" android:maxSdkVersion="18" />
   

3. 添加 Intents 以打开“图像选择器”和“照片捕获”

   //A system-based view to select photos.
   private void dispatchPhotoSelectionIntent() {
   Intent galleryIntent = new Intent(Intent.ACTION_PICK,
           android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
   this.startActivityForResult(galleryIntent, REQUEST_IMAGE_SELECTOR);
   }
   
   
   
       //Open system camera application to capture a photo.
       private void dispatchTakePictureIntent() {
   Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
   // Ensure that there's a camera activity to handle the intent
   if (takePictureIntent.resolveActivity(App.Instance.getPackageManager()) != null) {
       try {
           createImageFile();
       } catch (IOException ex) {
           // Error occurred while creating the File
       }
       // Continue only if the File was successfully created
       if (mCurrentPhoto != null) {
           takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(mCurrentPhoto));
           startActivityForResult(takePictureIntent, REQUEST_IMAGE_CAPTURE);
       }
   }
   }
   

4. 获取照片时添加处理。

   @Override
   public void onActivityResult(int requestCode, int resultCode, Intent data) {
   switch (requestCode) {
   case REQUEST_IMAGE_SELECTOR:
       if (resultCode == Activity.RESULT_OK && data != null && data.getData() != null) {
           String[] filePathColumn = { MediaStore.Images.Media.DATA };
           Cursor cursor = App.Instance.getContentResolver().query(data.getData(), filePathColumn, null, null, null);
           if (cursor == null || cursor.getCount() < 1) {
               mCurrentPhoto = null;
               break;
           }
           cursor.moveToFirst();
           int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
           if(columnIndex < 0) { // no column index
               mCurrentPhoto = null;
               break;
           }
           mCurrentPhoto = new File(cursor.getString(columnIndex));
           cursor.close();
       } else {
           mCurrentPhoto = null;
       }
       break;
   case REQUEST_IMAGE_CAPTURE:
       if (resultCode != Activity.RESULT_OK) {
           mCurrentPhoto = null;
       }
       break;
   }
   if (mCurrentPhoto != null) {
       ImageView imageView = (ImageView) [parent].findViewById(R.id.loaded_iv);
       Picasso.with(App.Instance).load(mCurrentPhoto).into(imageView);
   }
   super.onActivityResult(requestCode, resultCode, data);
   }
   

Answer 5

由于您不希望返回结果，请尝试以下简单代码。

Intent i=new Intent(Intent.ACTION_PICK);
            i.setType("image/*");
            startActivity(i);

Answer 6

如果有人仍然收到错误，即使添加了以下代码

Intent intent = new Intent();
        intent.setType("image/*");
        intent.setAction(Intent.ACTION_GET_CONTENT);
        startActivityForResult(Intent.createChooser(intent, "Select Picture"), PICK_IMAGE);

那么您可能会在另一个类中打开意图（通过调用），因此当您单击按钮时应用程序将崩溃。

问题的解决方案

将intent放入连接到按钮布局文件的类文件中。 例如 - activity_main.xml 包含按钮，它连接到 MainActivity.java 文件。但是由于碎片化，您在其他一些类中定义意图（让我们说 Activity.java）然后您的应用程序将崩溃除非您将意图放在 MainActivity.java 文件中。我收到了这个错误并且就这样解决了。