Question

我正在研究android应用程序，其中我将图像存储在数据库中，并且显示时间我的网址如下：http://files.parsetfss.com/ee6c904a-c395-4a92-bb80-9fe687901411/tfss-4a6bdb3c-5818-4057-964f-99bcf23f3d35-1425711426766.jpg我已经看到使用文件名打开图像查看器的代码，如下面的代码：

    Intent intent = new Intent(Intent.ACTION_VIEW, Uri.fromFile(file));
           intent.setDataAndType(Uri.fromFile(file),"image/png");
           mActivity.startActivity(intent);

但问题是我的网址不是文件格式，在图像显示时我使用以下代码：

 String url "";
    url = data.getText(); // Coming from the data base as a link
    Picasso.with(view.getContext()).load(url).into(mHolder.mImgReceived);

我需要从来自数据库http://files.parsetfss.com/ee6c904a-c395-4a92-bb80-9fe687901411/tfss-4a6bdb3c-5818-4057-964f-99bcf23f3d35-1425711426766.jpg的链接打开图像查看器。在用毕加索展示它的时候它正在向我显示图片，我需要用图像查看器打开相同的图像。请帮帮我。

Answer 1

试试这个，

String url "";
    url = data.getText(); // Coming from the data base as a link

     Uri myUri = Uri.parse(url);
        Intent intent = new Intent(android.content.Intent.ACTION_SEND);
                    intent.setAction(Intent.ACTION_VIEW);
                    intent.setDataAndType(myUri , "image/png");
                    startActivity(intent);

Answer 2

使用此代码段

DISTINCT

Answer 3

尝试使用此方法

 public static String getRealPathFromURI(Context context, Uri uri) {

    final boolean isKitKat = Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT;

    // DocumentProvider
    if (isKitKat && DocumentsContract.isDocumentUri(context, uri)) {
        // ExternalStorageProvider
        if (isExternalStorageDocument(uri)) {
            final String docId = DocumentsContract.getDocumentId(uri);
            final String[] split = docId.split(":");
            final String type = split[0];

            if ("primary".equalsIgnoreCase(type)) {
                return Environment.getExternalStorageDirectory() + "/" + split[1];
            }

            // TODO handle non-primary volumes
        }
        // DownloadsProvider
        else if (isDownloadsDocument(uri)) {

            final String id = DocumentsContract.getDocumentId(uri);
            final Uri contentUri = ContentUris.withAppendedId(
                    Uri.parse("content://downloads/public_downloads"), Long.valueOf(id));

            return getDataColumn(context, contentUri, null, null);
        }
        // MediaProvider
        else if (isMediaDocument(uri)) {
            final String docId = DocumentsContract.getDocumentId(uri);
            final String[] split = docId.split(":");
            final String type = split[0];

            Uri contentUri = null;
            if ("image".equals(type)) {
                contentUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
            } else if ("video".equals(type)) {
                contentUri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI;
            } else if ("audio".equals(type)) {
                contentUri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
            }

            final String selection = "_id=?";
            final String[] selectionArgs = new String[]{
                    split[1]
            };

            return getDataColumn(context, contentUri, selection, selectionArgs);
        }
    }
    // MediaStore (and general)
    else if ("content".equalsIgnoreCase(uri.getScheme())) {
        return getDataColumn(context, uri, null, null);
    }
    // File
    else if ("file".equalsIgnoreCase(uri.getScheme())) {
        return uri.getPath();
    }

    return null;
}


public static String getDataColumn(Context context, Uri uri, String selection,
                                   String[] selectionArgs) {

    Cursor cursor = null;
    final String column = "_data";
    final String[] projection = {
            column
    };

    try {
        cursor = context.getContentResolver().query(uri, projection, selection, selectionArgs,
                null);
        if (cursor != null && cursor.moveToFirst()) {
            final int column_index = cursor.getColumnIndexOrThrow(column);
            return cursor.getString(column_index);
        }
    } finally {
        if (cursor != null)
            cursor.close();
    }
    return null;
}


public static boolean isExternalStorageDocument(Uri uri) {
    return "com.android.externalstorage.documents".equals(uri.getAuthority());
}



public static boolean isDownloadsDocument(Uri uri) {
    return "com.android.providers.downloads.documents".equals(uri.getAuthority());
}


public static boolean isMediaDocument(Uri uri) {
    return "com.android.providers.media.documents".equals(uri.getAuthority());
}

从存储在数据库android

3 个答案: