从android库中选择多个图像

So basically what i am trying to achieve is opening the Gallery in Android and let the user select multiple images. Now this question has been asked frequently but i'm not satisfied with the answers. Mainly because i found something interesting in de docs in my IDE (i come back on this later) and thereby i don't want to use a custom adapter but just the vanilla one.

所以基本上我想要实现的是在Android中打开Gallery并让用户选择多个图像。现在这个问题经常被问到，但我对答案不满意。主要是因为我在我的IDE中找到了de docs中的一些有趣内容（我稍后再回过头来），因此我不想使用自定义适配器而只需要使用自定义适配器。

Now my code for selecting one image is:

现在我选择一个图像的代码是：

Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(Intent.createChooser(intent,"Select Picture"), 1);

Now People on SO and other websites wil tell you you have 2 options:

现在SO和其他网站上的人们会告诉你，你有两个选择：

1) Do not use ACTION_GET_CONTENT but ACTION_SEND_MULTIPLE instead.
This one doesn't work. This one is according to the docs for sending files and not retrieving and that's exactly what it does. When using ACTION_SEND_MULTIPLE i got a window opened at my device where i have to select an application to send my data to. That's not what i want, so i wonder how people got this achieved with this solution.. Do i miss something?

1）请勿使用ACTION_GET_CONTENT而应使用ACTION_SEND_MULTIPLE。这个不起作用。这个是根据文件发送文件而不是检索，这正是它的作用。当使用ACTION_SEND_MULTIPLE时，我在我的设备上打开了一个窗口，我必须选择一个应用程序来发送我的数据。这不是我想要的，所以我想知道人们如何通过这个解决方案实现这一目标。我想念一些东西吗？

2) Implement an custom Gallery. Now this is my last option i will consider because imho it's not what i am searching for because i have to style it myself AND why the heck you just can't select multiple images in the vanilla gallery?

2）实现自定义图库。现在这是我将考虑的最后一个选项，因为我不是我要搜索的东西，因为我必须自己设计风格以及为什么你不能在香草画廊中选择多个图像？

There must be an option for this.. Now the interesting thing what i'v found is this:
I found this in the docs description of ACTION_GET_CONTENT.

必须有一个选项..现在我发现的有趣的是这个：我在ACTION_GET_CONTENT的文档描述中找到了这个。

If the caller can handle multiple returned items (the user performing multiple selection), then it can specify EXTRA_ALLOW_MULTIPLE to indicate this.

如果调用者可以处理多个返回的项（用户执行多个选择），那么它可以指定EXTRA_ALLOW_MULTIPLE来指示这一点。

This is pretty interesting. Here they are referring it to the use case where a user can select multiple items?

这非常有趣。在这里，他们将其引用到用户可以选择多个项目的用例？

Later on they say in the docs:

后来他们在文档中说：

You may use EXTRA_ALLOW_MULTIPLE to allow the user to select multiple items.

您可以使用EXTRA_ALLOW_MULTIPLE来允许用户选择多个项目。

So this is pretty obvious right? This is what i need. But my following question is: Where can i put this EXTRA_ALLOW_MULTIPLE? The sad thing is that i can't find this no where in the developers.android guide and also is this not defined as a constant in the INTENT class.

所以这很明显吧？这就是我需要的。但我的以下问题是：我在哪里可以放这个EXTRA_ALLOW_MULTIPLE？令人遗憾的是，我无法在developers.android指南中找到它，也没有在INTENT类中将其定义为常量。

Anybody can help me out with this EXTRA_ALLOW_MULTIPLE?

有人可以帮我解决这个EXTRA_ALLOW_MULTIPLE吗？

9 个解决方案

#1

The EXTRA_ALLOW_MULTIPLE option is set on the intent through the Intent.putExtra() method:

通过Intent.putExtra（）方法在intent上设置EXTRA_ALLOW_MULTIPLE选项：

intent.putExtra(Intent.EXTRA_ALLOW_MULTIPLE, true);

Your code above should look like this:

您上面的代码应如下所示：

Intent intent = new Intent();
intent.setType("image/*");
intent.putExtra(Intent.EXTRA_ALLOW_MULTIPLE, true);
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(Intent.createChooser(intent,"Select Picture"), 1);

Note: the EXTRA_ALLOW_MULTIPLE option is only available in Android API 18 and higher.

注意：EXTRA_ALLOW_MULTIPLE选项仅适用于Android API 18及更高版本。

#2

Define these variables in the class:

在类中定义这些变量：

int PICK_IMAGE_MULTIPLE = 1; 
String imageEncoded;    
List<String> imagesEncodedList;

Let's Assume that onClick on a button it should open gallery to select images

让我们假设onClick一个按钮它应该打开画廊来选择图像

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

Then you should override onActivityResult Method

然后你应该覆盖onActivityResult方法

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    try {
        // When an Image is picked
        if (requestCode == PICK_IMAGE_MULTIPLE && resultCode == RESULT_OK
                    && null != data) {
            // Get the Image from data

            String[] filePathColumn = { MediaStore.Images.Media.DATA };
            imagesEncodedList = new ArrayList<String>();
            if(data.getData()!=null){

                Uri mImageUri=data.getData();

                // Get the cursor
                Cursor cursor = getContentResolver().query(mImageUri,
                            filePathColumn, null, null, null);
                // Move to first row
                cursor.moveToFirst();

                int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
                imageEncoded  = cursor.getString(columnIndex);
                cursor.close();

            } else {
                if (data.getClipData() != null) {
                    ClipData mClipData = data.getClipData();
                    ArrayList<Uri> mArrayUri = new ArrayList<Uri>();
                    for (int i = 0; i < mClipData.getItemCount(); i++) {

                        ClipData.Item item = mClipData.getItemAt(i);
                        Uri uri = item.getUri();
                        mArrayUri.add(uri);
                        // Get the cursor
                        Cursor cursor = getContentResolver().query(uri, filePathColumn, null, null, null);
                        // Move to first row
                        cursor.moveToFirst();

                        int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
                        imageEncoded  = cursor.getString(columnIndex);
                        imagesEncodedList.add(imageEncoded);
                        cursor.close();

                    }
                    Log.v("LOG_TAG", "Selected Images" + mArrayUri.size());
                }
            }
        } else {
            Toast.makeText(this, "You haven't picked Image",
                        Toast.LENGTH_LONG).show();
        }
    } catch (Exception e) {
        Toast.makeText(this, "Something went wrong", Toast.LENGTH_LONG)
                    .show();
    }

    super.onActivityResult(requestCode, resultCode, data);
}

NOTE THAT: the gallery doesn't give you the ability to select multi-images so we here open all images studio that you can select multi-images from them. and don't forget to add the permissions to your manifest

注意：图库不能让您选择多图像，因此我们在这里打开所有图像工作室，您可以从中选择多图像。并且不要忘记向清单添加权限

VERY IMPORTANT: getData(); to get one single image and I've stored it here in imageEncoded String if the user select multi-images then they should be stored in the list

非常重要：getData（）;得到一个单一的图像，我把它存储在imageEncoded字符串中如果用户选择多个图像，那么它们应该存储在列表中

So you have to check which is null to use the other

所以你必须检查哪个是null才能使用另一个

Wish you have a nice try and to others

希望你和别人有个好的尝试

#3

I hope this answer isn't late. Because the gallery widget doesn't support multiple selection by default, but you can custom the gridview which accepted your multiselect intent. The other option is to extend the gallery view and add in your own code to allow multiple selection.
This is the simple library can do it: https://github.com/luminousman/MultipleImagePick

我希望这个答案不迟。因为图库窗口小部件默认情况下不支持多选，但您可以自定义接受多选意图的gridview。另一个选项是扩展库视图并添加您自己的代码以允许多个选择。这是简单的库可以做到的：https：//github.com/luminousman/MultipleImagePick

Update:
From @ilsy's comment, CustomGalleryActivity in this library use manageQuery, which is deprecated, so it should be changed to getContentResolver().query() and cursor.close() like this answer

更新：从@ ilsy的评论来看，这个库中的CustomGalleryActivity使用了不推荐使用的manageQuery，因此应该将其更改为getContentResolver（）。query（）和cursor.close（），就像这个答案一样

#4

A lot of these answers have similarities but are all missing the most important part which is in onActivityResult, check if data.getClipData is null before checking data.getData

很多这些答案都有相似之处，但都缺少onActivityResult中最重要的部分，在检查data.getData之前检查data.getClipData是否为null。

The code to call the file chooser:

调用文件选择器的代码：

Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
intent.setType("image/*"); //allows any image file type. Change * to specific extension to limit it
//**These following line is the important one!
intent.putExtra(Intent.EXTRA_ALLOW_MULTIPLE, true);
startActivityForResult(Intent.createChooser(intent, "Select Picture"), SELECT_PICTURES); //SELECT_PICTURES is simply a global int used to check the calling intent in onActivityResult

The code to get all of the images selected:

获取所有图像的代码：

@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if(requestCode == SELECT_PICTURES) {
        if(resultCode == Activity.RESULT_OK) {
            if(data.getClipData() != null) {
                int count = data.getClipData().getItemCount(); //evaluate the count before the for loop --- otherwise, the count is evaluated every loop.
                for(int i = 0; i < count; i++)  
                    Uri imageUri = data.getClipData().getItemAt(i).getUri();
                    //do something with the image (save it to some directory or whatever you need to do with it here) 
                }
            } else if(data.getData() != null) {
                String imagePath = data.getData().getPath();
                //do something with the image (save it to some directory or whatever you need to do with it here)
            }
        }
    }
}

Note that Android's chooser has Photos and Gallery available on some devices. Photos allows multiple images to be selected. Gallery allows just one at a time.

请注意，Android的选择器在某些设备上提供了照片和图库。照片允许选择多个图像。 Gallery一次只允许一个。

#5

Hi below code is working fine.

嗨，下面的代码工作正常。

 Cursor imagecursor1 = managedQuery(
    MediaStore.Images.Media.EXTERNAL_CONTENT_URI, columns, null,
    null, orderBy + " DESC");

   this.imageUrls = new ArrayList<String>();
  imageUrls.size();

   for (int i = 0; i < imagecursor1.getCount(); i++) {
   imagecursor1.moveToPosition(i);
   int dataColumnIndex = imagecursor1
     .getColumnIndex(MediaStore.Images.Media.DATA);
   imageUrls.add(imagecursor1.getString(dataColumnIndex));
  }

   options = new DisplayImageOptions.Builder()
  .showStubImage(R.drawable.stub_image)
  .showImageForEmptyUri(R.drawable.image_for_empty_url)
  .cacheInMemory().cacheOnDisc().build();

   imageAdapter = new ImageAdapter(this, imageUrls);

   gridView = (GridView) findViewById(R.id.PhoneImageGrid);
  gridView.setAdapter(imageAdapter);

You want to more clarifications. http://mylearnandroid.blogspot.in/2014/02/multiple-choose-custom-gallery.html

你想要更多澄清。 http://mylearnandroid.blogspot.in/2014/02/multiple-choose-custom-gallery.html

#6

I also had the same issue. I also wanted so users could take photos easily while picking photos from the gallery. Couldn't find a native way of doing this therefore I decided to make an opensource project. It is much like MultipleImagePick but just better way of implementing it.

我也有同样的问题。我也希望用户可以在从画廊中挑选照片时轻松拍照。无法找到这样做的本地方式，因此我决定制作一个开源项目。它很像MultipleImagePick，但只是更好的实现方式。

https://github.com/giljulio/android-multiple-image-picker

https://github.com/giljulio/android-multiple-image-picker

private static final RESULT_CODE_PICKER_IMAGES = 9000;


Intent intent = new Intent(this, SmartImagePicker.class);
startActivityForResult(intent, RESULT_CODE_PICKER_IMAGES);


@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
    switch (requestCode){
        case RESULT_CODE_PICKER_IMAGES:
            if(resultCode == Activity.RESULT_OK){
                Parcelable[] parcelableUris = data.getParcelableArrayExtra(ImagePickerActivity.TAG_IMAGE_URI);

                //Java doesn't allow array casting, this is a little hack
                Uri[] uris = new Uri[parcelableUris.length];
                System.arraycopy(parcelableUris, 0, uris, 0, parcelableUris.length);

                //Do something with the uris array
            }
            break;

        default:
            super.onActivityResult(requestCode, resultCode, data);
            break;
    }
}

#7

Try this one IntentChooser. Just add some lines of code, I did the rest for you.

试试这个IntentChooser。只需添加一些代码行，我就为您完成剩下的工作。

private void startImageChooserActivity() {
    Intent intent = ImageChooserMaker.newChooser(MainActivity.this)
            .add(new ImageChooser(true))
            .create("Select Image");
    startActivityForResult(intent, REQUEST_IMAGE_CHOOSER);
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if (requestCode == REQUEST_IMAGE_CHOOSER && resultCode == RESULT_OK) {
        List<Uri> imageUris = ImageChooserMaker.getPickMultipleImageResultUris(this, data);
    }
}

PS: as mentioned at the answers above, EXTRA_ALLOW_MULTIPLE is only available for API >= 18. And some gallery apps don't make this feature available (Google Photos and Documents (com.android.documentsui) work.

PS：正如上面的答案所述，EXTRA_ALLOW_MULTIPLE仅适用于API> = 18.并且某些图库应用程序无法使用此功能（Google照片和文档（com.android.documentsui））。

#8

Initialize instance:

初始化实例：

private String imagePath;
private List<String> imagePathList;

In onActivityResult You have to write this, If-else 2 block. One for single image and another for multiple image.

在onActivityResult你必须写这个，If-else 2块。一个用于单个图像，另一个用于多个图像。

if (requestCode == GALLERY_CODE && resultCode == RESULT_OK  && data != null){

    imagePathList = new ArrayList<>();

    if(data.getClipData() != null){

        int count = data.getClipData().getItemCount();
        for (int i=0; i<count; i++){

            Uri imageUri = data.getClipData().getItemAt(i).getUri();
            getImageFilePath(imageUri);
        }
    }
    else if(data.getData() != null){

        Uri imgUri = data.getData();
        getImageFilePath(imgUri);
    }
}

Most important part, Get Image Path from uri:

最重要的部分，从uri获取图像路径：

public void getImageFilePath(Uri uri) {

    File file = new File(uri.getPath());
    String[] filePath = file.getPath().split(":");
    String image_id = filePath[filePath.length - 1];

    Cursor cursor = getContentResolver().query(android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI, null, MediaStore.Images.Media._ID + " = ? ", new String[]{image_id}, null);
    if (cursor!=null) {
        cursor.moveToFirst();
        imagePath = cursor.getString(cursor.getColumnIndex(MediaStore.Images.Media.DATA));
        imagePathList.add(imagePath);
        cursor.close();
    }
}

Hope this can help you.

希望这可以帮到你。

#9

Smart android gallery with multiple image selection action.

具有多个图像选择动作的智能android库。

Check the demo on my blog

Firstly make button for action and you can use it for single/multiple

首先制作动作按钮，你可以将它用于单个/多个

For Single image selection:- - luminous.ACTION_PICK for choosing single image.

对于单个图像选择： - - luminous.ACTION_PICK用于选择单个图像。

For Multiple image selection:- - luminous.ACTION_MULTIPLE_PICK for choosing multiple image.

对于多个图像选择： - - luminous.ACTION_MULTIPLE_PICK用于选择多个图像。

MainActivity.java

MainActivity.java

// For single image
Intent i = new Intent(Action.ACTION_PICK);
startActivityForResult(i, 100);

// For multiple images
Intent i = new Intent(Action.ACTION_MULTIPLE_PICK);
startActivityForResult(i, 200);

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

        if (requestCode == 100 && resultCode == Activity.RESULT_OK) {
            adapter.clear();

            viewSwitcher.setDisplayedChild(1);
            String single_path = data.getStringExtra("single_path");
            imageLoader.displayImage("file://" + single_path, imgSinglePick);

        } else if (requestCode == 200 && resultCode == Activity.RESULT_OK) {
            String[] all_path = data.getStringArrayExtra("all_path");

            ArrayList<CustomGallery> dataT = new ArrayList<CustomGallery>();

            for (String string : all_path) {
                CustomGallery item = new CustomGallery();
                item.sdcardPath = string;

                dataT.add(item);
            }

            viewSwitcher.setDisplayedChild(0);
            adapter.addAll(dataT);
        }
    }

In AndroidManifest.xml

在AndroidManifest.xml中

<activity android:name="CustomGalleryActivity" >
            <intent-filter>
                <action android:name="luminous.ACTION_PICK" />
                <action android:name="luminous.ACTION_MULTIPLE_PICK" />

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