如何打开gallery以选择多个图像？

Question

我想打开画廊与多个图像选择功能，我使用以下代码。

        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);

它会打开gallery应用程序，但不允许我选择多个图像。

Answer 1

试试这个：

public class MainActivity extends AppCompatActivity implements    View.OnClickListener {

  private static final int SELECT_PICTURE = 100;
  private static final String TAG = "MainActivity";

  CoordinatorLayout coordinatorLayout;
  FloatingActionButton btnSelectImage;
  AppCompatImageView imgView;


  @Override
   protected void onCreate(Bundle savedInstanceState) {
   super.onCreate(savedInstanceState);
   setContentView(R.layout.activity_main);

   Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
   setSupportActionBar(toolbar);

   // Find the views...
   coordinatorLayout = (CoordinatorLayout)      findViewById(R.id.coordinatorLayout);
   btnSelectImage = (FloatingActionButton)  findViewById(R.id.btnSelectImage);
   imgView = (AppCompatImageView) findViewById(R.id.imgView);

   btnSelectImage.setOnClickListener(this);

   }

   /* Choose an image from Gallery */
   void openImageChooser() {
   Intent intent = new Intent();
    intent.setType("image/*");
    intent.setAction(Intent.ACTION_GET_CONTENT);
    startActivityForResult(Intent.createChooser(intent, "Select Picture"),  SELECT_PICTURE);
  }

 public void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (resultCode == RESULT_OK) {
       if (requestCode == SELECT_PICTURE) {
        // Get the url from data
        Uri selectedImageUri = data.getData();
        if (null != selectedImageUri) {
            // Get the path from the Uri
            String path = getPathFromURI(selectedImageUri);
            Log.i(TAG, "Image Path : " + path);
            // Set the image in ImageView
            imgView.setImageURI(selectedImageUri);
             }
           }
         }
       }


     public String getPathFromURI(Uri contentUri) {
     String res = null;
     String[] proj = {MediaStore.Images.Media.DATA};
     Cursor cursor = getContentResolver().query(contentUri, proj, null, null, null);
     if (cursor.moveToFirst()) {
       int column_index =   cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
      res = cursor.getString(column_index);
    }
    cursor.close();
    return res;
 }

   @Override
   public void onClick(View v) {
     openImageChooser();
    }
}

在清单文件中添加权限。

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

Answer 2

单击并按住可选择多个图像。不要只点击图片。你也可以用这个来接收这些图像。

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

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    try {
        // When an Image is picked
        if (requestCode == 1 && 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);
}

Answer 3

从api22到api29，这对我很有效。

Intent intent = new Intent();
                intent.setType("image/*");
                intent.putExtra(Intent.EXTRA_ALLOW_MULTIPLE, true);
                intent.setAction(Intent.ACTION_GET_CONTENT);
                intent.setData(MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
                startActivityForResult(intent, 105);

然后在活动结果覆盖方法中添加此代码。

if (resultCode == RESULT_OK && requestCode == 105) {
            ClipData clipData = data.getClipData();
            if (clipData != null) {
                for (int i = 0; i < clipData.getItemCount(); i++) {
                    Uri imageUri = clipData.getItemAt(i).getUri();
                    // your code for multiple image selection
                }
            } else {
              Uri uri = data.getData();
                // your codefor single image selection
            }

注意：在你得到图库屏幕后，再按住图像一点。然后在右上角单击“打开”。它将允许你选择多个图像。