我有一个onActivityResult从一个mediastore图像选择返回,我可以获得一个图像使用以下URI:

Uri selectedImage = data.getData();

将this转换为字符串会得到:

content://media/external/images/media/47

或路径给出:

/external/images/media/47

然而,我似乎找不到一种方法将其转换为绝对路径,因为我想将图像加载到位图中,而不必复制到某个地方。我知道这可以使用URI和内容解析器来完成,但这似乎在重新启动手机时中断,我猜MediaStore在重新启动之间没有保持其编号相同。


当前回答

由于managedQuery已弃用,您可以尝试:

CursorLoader cursorLoader = new CursorLoader(context, uri, proj, null, null, null);
Cursor cursor = cursorLoader.loadInBackground();

其他回答

从图库中获取图像后,只需要在下面的方法中传递URI,仅适用于Android 4.4 (KitKat):

public String getPath(Uri contentUri) {// Will return "image:x*"

    String wholeID = DocumentsContract.getDocumentId(contentUri);

    // Split at colon, use second item in the array
    String id = wholeID.split(":")[1];

    String[] column = { MediaStore.Images.Media.DATA };

    // Where id is equal to
    String sel = MediaStore.Images.Media._ID + "=?";

    Cursor cursor = getContentResolver().query(
            MediaStore.Images.Media.EXTERNAL_CONTENT_URI, column, sel,
            new String[] { id }, null);

    String filePath = "";

    int columnIndex = cursor.getColumnIndex(column[0]);

    if (cursor.moveToFirst()) {
        filePath = cursor.getString(columnIndex);
    }

    cursor.close();
    return filePath;
}

下面API 19使用这段代码从URI中获取文件路径:

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

这里您可以得到文件的名称

String[] projection = {MediaStore.MediaColumns.DISPLAY_NAME};
                    Uri uri = data.getData();
                    String fileName = null;
                    ContentResolver cr = getActivity().getApplicationContext().getContentResolver();

                    Cursor metaCursor = cr.query(uri,
                            projection, null, null, null);
                    if (metaCursor != null) {
                        try {
                            if (metaCursor.moveToFirst()) {
                                fileName = metaCursor.getString(0);
                            }
                        } finally {
                            metaCursor.close();
                        }
                    }

试试这个

不过,如果你想要得到真正的答案,你可以试试我的答案。以上答案对我没有帮助。

解释:-这个方法获取URI,然后检查你的Android设备的API级别,根据API级别,它将生成真实路径。生成真实路径方法的代码根据API级别不同而不同。

method to get the Real path from URI @SuppressLint("ObsoleteSdkInt") public String getPathFromURI(Uri uri){ String realPath=""; // SDK < API11 if (Build.VERSION.SDK_INT < 11) { String[] proj = { MediaStore.Images.Media.DATA }; @SuppressLint("Recycle") Cursor cursor = getContentResolver().query(uri, proj, null, null, null); int column_index = 0; String result=""; if (cursor != null) { column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA); realPath=cursor.getString(column_index); } } // SDK >= 11 && SDK < 19 else if (Build.VERSION.SDK_INT < 19){ String[] proj = { MediaStore.Images.Media.DATA }; CursorLoader cursorLoader = new CursorLoader(this, uri, proj, null, null, null); Cursor cursor = cursorLoader.loadInBackground(); if(cursor != null){ int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA); cursor.moveToFirst(); realPath = cursor.getString(column_index); } } // SDK > 19 (Android 4.4) else{ String wholeID = DocumentsContract.getDocumentId(uri); // Split at colon, use second item in the array String id = wholeID.split(":")[1]; String[] column = { MediaStore.Images.Media.DATA }; // where id is equal to String sel = MediaStore.Images.Media._ID + "=?"; Cursor cursor = getContentResolver().query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, column, sel, new String[]{ id }, null); int columnIndex = 0; if (cursor != null) { columnIndex = cursor.getColumnIndex(column[0]); if (cursor.moveToFirst()) { realPath = cursor.getString(columnIndex); } cursor.close(); } } return realPath; } Use this method like this Log.e(TAG, "getRealPathFromURI: "+getPathFromURI(your_selected_uri) );

输出:

04-06 12:39:46,993 6138-6138/com。qtm E/tag: getrealthfro到处都是: /存储/ emulated / 0 /视频/ avengers_infinity_war_4k_8k-7680x4320。jpg

完美地为我修复了这篇文章的代码:

  public static String getRealPathImageFromUri(Uri uri) {
        String fileName =null;
        if (uri.getScheme().equals("content")) {
            try (Cursor cursor = MyApplication.getInstance().getContentResolver().query(uri, null, null, null, null)) {
                if (cursor.moveToFirst()) {
                    fileName = cursor.getString(cursor.getColumnIndexOrThrow(ediaStore.Images.Media.DATA));
                }
            } catch (IllegalArgumentException e) {
                Log.e(mTag, "Get path failed", e);
            }
        }
        return fileName;
    }