共享 SD 卡中的图像

我花了两周时间寻找如何共享存储在 SD 卡上的图像，但没有成功。

This answer对我不起作用，也不是我正在寻找的。

我正在与凸轮预览应用程序将图像存储到 SD，然后在应用程序内图库中显示它们：

   public class GalleryView extends Activity {  

   private static final int SELECT_PICTURE = 1;

private String selectedImagePath;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.gallery_view);

    Gallery g = (Gallery) findViewById(R.id.gallery);
    g.setAdapter(new ImageAdapter(this, ReadSDCard()));


    g.setOnItemClickListener(new OnItemClickListener() {
        public void onItemClick(AdapterView<?> parent, View v, int position, long id) {
    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) {
            Uri selectedImageUri = data.getData();
            selectedImagePath = getPath(selectedImageUri);

            Intent shareIntent = new Intent();
            shareIntent.setAction(Intent.ACTION_SEND);
            shareIntent.putExtra(Intent.EXTRA_STREAM, selectedImagePath);
            shareIntent.setType("image/*");
            startActivity(Intent.createChooser(shareIntent, "Share image"));
        }
    }
}

public String getPath(Uri uri) {
    String[] projection = { MediaStore.Images.Media.DATA };
    Cursor cursor = managedQuery(uri, projection, null, null, null);
    int column_index = cursor
            .getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
    cursor.moveToFirst();
    return cursor.getString(column_index);
}

@Override
public void onDestroy() {
    super.onDestroy();       
}

private List<String> ReadSDCard() {

    createDirIfNotExists();

    List<String> tFileList = new ArrayList<String>();

    //It have to be matched with the directory in SDCard
    File f = new File("/sdcard/Cam App");

    File[] files=f.listFiles();

    for(int i=0; i<files.length; i++) {
        File file = files[i];
        /*It's assumed that all file in the path are in supported type*/
        tFileList.add(file.getPath());
    }

    return tFileList;
}

class ViewHolder {
    ImageView i;
}

public class ImageAdapter extends BaseAdapter {
    int mGalleryItemBackground;
    private Context mContext;
    private List<String> FileList;
    LayoutInflater inflater = getLayoutInflater();
    ViewHolder holder;

    public ImageAdapter(Context c, List<String> fList) {
        mContext = c;
        FileList = fList;
        TypedArray a = obtainStyledAttributes(R.styleable.GalleryTheme);
        mGalleryItemBackground = a.getResourceId(R.styleable.GalleryTheme_android_galleryItemBackground, 0);
        a.recycle();
    }

    public int getCount() {
        return FileList.size();
    }

    public Object getItem(int position) {
        return position;
    } 

    public long getItemId(int position) {
        return position;
    }

    public View getView(int position, View convertView, ViewGroup parent) {
        ImageView i = new ImageView(mContext);

        Bitmap bm = BitmapFactory.decodeFile(FileList.get(position).toString());
        i.setImageBitmap(bm);

        if (convertView == null) {
            convertView = inflater.inflate(R.layout.gallery_item, parent, false);

            holder = new ViewHolder();
            holder.i = ((ImageView) convertView.findViewById(R.id.imagenGallery));

            convertView.setTag(holder);
        }
        holder.i.setScaleType(ImageView.ScaleType.FIT_XY);
        holder.i.setBackgroundResource(mGalleryItemBackground);

        return i;
    }
}

public TypedArray obtainStyledAttributes(int theme) {
    // TODO Auto-generated method stub
    return null;
}
}

图库工作正常，但我不知道如何共享保存在 SD 上的图像。

如何访问该图像凸轮应用程序文件夹并分享画廊中那一刻出现的图像？

我尝试使用位置，但它仅适用于恒定图像。任何帮助/提示将不胜感激。

好吧，我终于找到了解决方案，但这并不是我想要的：

g.setOnItemClickListener(new OnItemClickListener() {
        public void onItemClick(AdapterView<?> parent, View v, int position, long id) {

            Intent intent = new Intent();
            intent.setAction(Intent.ACTION_GET_CONTENT);
            intent.setDataAndType(Uri.parse("file://" + "/sdcard/Cam App"), "image/*");
            startActivityForResult(Intent.createChooser(intent, "Select image to share:"), SELECT_PICTURE);
        }
    });
}

public void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (resultCode == RESULT_OK) {
        if (requestCode == SELECT_PICTURE) {
            Uri selectedImageUri = data.getData();
            //OI FILE Manager
            filemanagerstring = selectedImageUri.getPath();

            //MEDIA GALLERY
            selectedImagePath = getPath(selectedImageUri);

            //NOW WE HAVE OUR WANTED STRING
            if(selectedImagePath!=null)
                System.out.println("selectedImagePath is the right one for you!");
            else
                System.out.println("filemanagerstring is the right one for you!");

            Intent shareIntent = new Intent();
            shareIntent.setAction(Intent.ACTION_SEND);
            shareIntent.putExtra(Intent.EXTRA_STREAM, selectedImageUri);
            shareIntent.setType("image/*");
            startActivity(Intent.createChooser(shareIntent, "Share image via:"));
        }
    }
}

@SuppressWarnings("deprecation")
public String getPath(Uri uri) {
    String[] projection = { MediaStore.Images.Media.DATA };
    Cursor cursor = managedQuery(uri, projection, null, null, null);
    if(cursor!=null) {
        //HERE YOU WILL GET A NULLPOINTER IF CURSOR IS NULL
        //THIS CAN BE, IF YOU USED OI FILE MANAGER FOR PICKING THE MEDIA
        int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
        cursor.moveToFirst();
        return cursor.getString(column_index);
    }
    else return null;
}

如果有人有更好的解决方案，请分享。