27

I'm trying to select multiple files with an Intent, but it seems like I'm missing on something.
I create an Intent.ACTION_GET_CONTENT Intent, put Intent.EXTRA_ALLOW_MULTIPLE as extra in
(it seems to perfectly fit the purpose) and create a chooser (optional), which chooses the application that should be able to pick multiple files and return them.

The Problem is that I can only pick a single file.

I tried multiple file explorers. It's API 18 (4.3). 

ACTIVITY_CHOOSE_FILE = 1;  //global constant
Button btn = (Button) this.findViewById(R.id.btnGetFiles);
btn.setOnClickListener(new OnClickListener() {
  @Override  
  public void onClick(View v) {  
    Intent chooseFile;  
    Intent intent;  
    chooseFile = new Intent(Intent.ACTION_GET_CONTENT);  
    chooseFile.setType("file/*");  
    chooseFile.putExtra(Intent.EXTRA_ALLOW_MULTIPLE, true);  
    intent = Intent.createChooser(chooseFile, "Choose a file");  
    startActivityForResult(intent, ACTIVITY_CHOOSE_FILE);  
  }  
});

I also added this to the Manifest (it had the same functionality before adding it):

        <intent-filter>
            <action android:name="android.intent.action.GET_CONTENT" />
            <category android:name="android.intent.category.DEFAULT" />
        </intent-filter>

Why can't I choose multiple files?
(For clarification: the problem is not, that multiple files aren't returned - I can't choose more than 1 file)

4

5 回答 5

17

我有同样的问题。这是我的解决方案。

爪哇：

public void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data)
    if(requestCode == PICKFILE_RESULT_CODE) {
       if(null != data) { // checking empty selection
          if(null != data.getClipData()) { // checking multiple selection or not
             for(int i = 0; i < data.getClipData().getItemCount(); i++) {
                Uri uri = data.getClipData().getItemAt(i).getUri();
             }
          } else {
             Uri uri = data.getData();
          }
       }
    }
 }

科特林：

override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent) {
        super.onActivityResult(requestCode, resultCode, data)
        when (requestCode) {
            PICKFILE_RESULT_CODE -> if (resultCode === Activity.RESULT_OK) {
                if (null != data) {
                    if (null !=data.clipData) {
                        for (i in 0 until data.clipData.itemCount) {
                            val uri = data.clipData.getItemAt(i).uri
                            dumpImageMetaData(uri)
                        }
                    } else {
                        val uri = data.data
                        dumpImageMetaData(uri)
                    }
                }
            }
        }
    }
于 2018-02-16T10:33:19.563 回答
12

为什么我不能选择多个文件？

据推测，“应该能够选择多个文件并返回它们的应用程序”的实现者没有实现EXTRA_ALLOW_MULTIPLE支持。联系他们并请求此功能。

于 2013-10-22T10:13:14.283 回答
9

我知道这是一个有点过时的帖子，但如果有人遇到它：在这个示例中，我们打开默认系统文件资源管理器以允许用户在他的设备上选择多个任何类型的文件：

Intent filesIntent;
filesIntent = new Intent(Intent.ACTION_GET_CONTENT);
filesIntent.putExtra(Intent.EXTRA_ALLOW_MULTIPLE, true);
filesIntent.addCategory(Intent.CATEGORY_OPENABLE);
filesIntent.setType("*/*");  //use image/* for photos, etc.
startActivityForResult(filesIntent, REQUEST_CODE_FOR_ON_ACTIVITY_RESULT);
于 2018-10-16T18:58:12.410 回答
5

我遇到了同样的问题并ACTION_OPEN_DOCUMENT为我工作。

public void selectImages() {
    Intent intent = new Intent();
    intent.setType("image/*");
    intent.putExtra(DocumentsContract.EXTRA_INITIAL_URI, your_initial_uri);
    intent.putExtra(Intent.EXTRA_ALLOW_MULTIPLE, true);
    intent.setAction(Intent.ACTION_OPEN_DOCUMENT);
    startActivityForResult(intent, 1);
}

public void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (requestCode == 1) {
        if(resultCode == RESULT_OK) {
// also check data.data because if the user select one file the file and uri will be in  data.data and data.getClipData() will be null
            for(int i = 0; i < data.getClipData().getItemCount(); i++) {
                Uri uri = data.getClipData().getItemAt(i).getUri();
                System.out.println("image" + i + "=" + uri.toString());                
             }
        }
   }
}
于 2017-11-29T15:25:04.843 回答
5

这是我的解决方案，它对我有用，并允许我选择任何类型的文件。

// Start intent from your method
Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
intent.putExtra(Intent.EXTRA_ALLOW_MULTIPLE, true);
intent.setType("*/*");
startActivityForResult(intent, 1001);

// Get the result from this Overriden method
@Override
protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {    
    if (resultCode == RESULT_OK) {
        switch (requestCode) {
            case 1001:

                // Checking whether data is null or not
                if (data != null) { 

                    // Checking for selection multiple files or single.
                    if (data.getClipData() != null){    

                        // Getting the length of data and logging up the logs using index
                        for (int index = 0; index < data.getClipData().getItemCount(); index++) {   

                            // Getting the URIs of the selected files and logging them into logcat at debug level
                            Uri uri = data.getClipData().getItemAt(index).getUri();
                            Log.d("filesUri [" + uri + "] : ", String.valueOf(uri) );
                        }
                    }else{ 

                        // Getting the URI of the selected file and logging into logcat at debug level
                        Uri uri = data.getData();
                        Log.d("fileUri: ", String.valueOf(uri));
                    }
                }
                break;
        }
    }
}
于 2019-05-30T15:48:40.173 回答