在按钮单击时从手机中选择pdf文件,并在textview上显示其文件名

Question

我想在按钮单击时从手机中选择pdf文件,并在文本视图中显示其文件名.到目前为止,我已经完成了打开文件管理器,点击按钮选择pdf

btnUpload.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Intent intent = new Intent();
            intent.setAction(Intent.ACTION_GET_CONTENT);
            intent.setType("application/pdf");
            startActivity(intent);
        }
    });

如何获取所选的文件名textview？

Answer 1

在startActivity(intent)的地方使用startActivityForResult(intent,1212 ); 并在onActivityResult中执行以下操作

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    switch (requestCode) {
    case 1212:
        if (resultCode == RESULT_OK) {
            // Get the Uri of the selected file
            Uri uri = data.getData();
            String uriString = uri.toString();
            File myFile = new File(uriString);
            String path = myFile.getAbsolutePath();
            String displayName = null;

            if (uriString.startsWith("content://")) {                   
                Cursor cursor = null;
                try {                           
                    cursor = getActivity().getContentResolver().query(uri, null, null, null, null);                         
                    if (cursor != null && cursor.moveToFirst()) {                               
                        displayName = cursor.getString(cursor.getColumnIndex(OpenableColumns.DISPLAY_NAME));
                    }
                } finally {
                    cursor.close();
                }
            } else if (uriString.startsWith("file://")) {           
                displayName = myFile.getName();
            }
        }
        break;
    }
    super.onActivityResult(requestCode, resultCode, data);
}