java - 从 Android Intent 打开图库应用

Question

我正在寻找一种Android从意图打开图库应用程序的方法。

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

我试图做以下事情：

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

score 36 · Accepted Answer

这就是你需要的：

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);

score 34 · Accepted Answer

我希望这能帮到您。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为图库视图

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);
    }

score 16 · Accepted Answer

您可以使用以下意图打开画廊：

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 或执行其他任何操作，请使用以下命令：

@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;
    }
}

在安卓 4.0+ 上测试

score 7 · Accepted Answer

以下可用于 Activity 或 Fragment。
```
 private File mCurrentPhoto;
```

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" />

添加意图以打开“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);
    }
}
}

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);
}

score 5 · Accepted Answer

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);

score 0 · Accepted Answer

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

将意图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。我收到此错误，并由此解决。

java - 从 Android Intent 打开图库应用

6 回答 6

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