我的SD卡中有一个视频文件，我想获取此文件的名称，我使用了这种方法：
public static String getFileName(Uri uri, ContentResolver resolver) {
String result = null;
if (uri.getScheme().equals("content")) {
Cursor cursor = resolver.query(uri, null, null, null, null);
try {
if (cursor != null && cursor.moveToFirst()) {
result = cursor.getString(cursor.getColumnIndex(OpenableColumns.DISPLAY_NAME));
}
} finally {
cursor.close();
}
}
if (result == null) {
result = uri.getPath();
int cut = result.lastIndexOf('/');
if (cut != -1) {
result = result.substring(cut + 1);
}
}
return result;
}
但有时我得到SecurityException：
FATAL EXCEPTION: main
Process: com.company, PID: 14012
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.company.MainActivity}: java.lang.SecurityException: Permission Denial: opening provider com.android.externalstorage.ExternalStorageProvider from ProcessRecord{43247db0 14012:com.company/u0a370} (pid=14012, uid=10370) requires android.permission.MANAGE_DOCUMENTS or android.permission.MANAGE_DOCUMENTS
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2319)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2370)
at android.app.ActivityThread.access$800(ActivityThread.java:155)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1243)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5426)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1268)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1084)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.SecurityException: Permission Denial: opening provider com.android.externalstorage.ExternalStorageProvider from ProcessRecord{43247db0 14012:com.company/u0a370} (pid=14012, uid=10370) requires android.permission.MANAGE_DOCUMENTS or android.permission.MANAGE_DOCUMENTS
at android.os.Parcel.readException(Parcel.java:1472)
at android.os.Parcel.readException(Parcel.java:1426)
at android.app.ActivityManagerProxy.getContentProvider(ActivityManagerNative.java:3039)
at android.app.ActivityThread.acquireProvider(ActivityThread.java:4660)
at android.app.ContextImpl$ApplicationContentResolver.acquireUnstableProvider(ContextImpl.java:2347)
at android.content.ContentResolver.acquireUnstableProvider(ContentResolver.java:1425)
at android.content.ContentResolver.query(ContentResolver.java:445)
at android.content.ContentResolver.query(ContentResolver.java:404)
at com.company.Utils.Utilities.getFileName(Utilities.java:104)
at com.company.MainActivity.onCreate(MainActivity.java:115)
at android.app.Activity.performCreate(Activity.java:5296)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1094)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2283)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2370)
at android.app.ActivityThread.access$800(ActivityThread.java:155)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1243)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5426)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1268)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1084)
at dalvik.system.NativeStart.main(Native Method)
有没有其他方法可以使用uri获取我的文件名，或者我的代码中有什么错误。
任何帮助，谢谢。