我正在尝试以这种方式获取文件:finalIntentchooseFileIntent=newIntent(Intent.ACTION_GET_CONTENT);String[]mimetypes={"application/pdf"};chooseFileIntent.setType("*/*");chooseFileIntent.addCategory(Intent.CATEGORY_OPENABLE);if(chooseFileIntent.resolveActivity(activity.getApplicationContext().getPackageManager())!=