android10系統運行代碼播放視頻，遇到這個問題了

public class MainActivity extends AppCompatActivity {

    private static final String TAG = "MainActivity-vv";



    private String path;

    private VideoView videoView;

    private MediaController mediaController;

    private File file;



    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        path = Environment.getExternalStorageDirectory().getAbsolutePath() + "/one.mp4";

        file = new File(path);



        videoView = findViewById(R.id.videoview);

        mediaController = new MediaController(this);

        checkPermissionAndPlayVideo();

    }



    private void checkPermissionAndPlayVideo() {

        int i = ContextCompat.checkSelfPermission(this, Manifest.permission.READ_EXTERNAL_STORAGE);

        if (i != PackageManager.PERMISSION_GRANTED) {

            ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.READ_EXTERNAL_STORAGE}, 999);

        } else {

            playVideo();

        }

    }



    private void playVideo() {

        videoView.setMediaController(mediaController);

        videoView.setVideoPath(path);

        videoView.start();

    }



    @Override

    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {

        if (requestCode == 999) {

            if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {

                playVideo();

            } else {

                Toast.makeText(this, "需要取得SDcard權限", Toast.LENGTH_SHORT).show();

            }

        }

    }

}

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

    package="com.example.myapplication">



    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"></uses-permission>



    <application

        android:allowBackup="true"

        android:icon="@mipmap/ic_launcher"

        android:label="@string/app_name"

        android:roundIcon="@mipmap/ic_launcher_round"

        android:supportsRtl="true"

        android:theme="@style/AppTheme">

        <activity android:name=".MainActivity">

            <intent-filter>

                <action android:name="android.intent.action.MAIN" />



                <category android:name="android.intent.category.LAUNCHER" />

            </intent-filter>

        </activity>



        <provider

            android:authorities="com.imooc.provider"

            android:name="androidx.core.content.FileProvider"

            android:grantUriPermissions="true"

            android:exported="false">

            <meta-data

                android:name="android.support.FILE_PROVIDER_PATHS"

                android:resource="@xml/file_path"></meta-data>

        </provider>





    </application>



</manifest>

<?xml version="1.0" encoding="utf-8"?>

<paths xmlns:android="http://schemas.android.com/apk/res/android">



    <external-path

        name="name"

        path=""></external-path>



</paths>

2020-03-15 09:57:30.328 8615-8741/com.example.myapplication D/HiTouch_PressGestureDetector: onAttached, package=com.example.myapplication, windowType=1, mHiTouchRestricted=false

2020-03-15 09:57:30.332 8615-8615/com.example.myapplication W/MediaPlayer: Couldn't open uri in attemptDataSource

2020-03-15 09:57:30.334 8615-8615/com.example.myapplication W/VideoView: Unable to open content: /storage/emulated/0/one.mp4

    java.io.FileNotFoundException: /storage/emulated/0/one.mp4: open failed: EACCES (Permission denied)

        at libcore.io.IoBridge.open(IoBridge.java:496)

        at java.io.FileInputStream.<init>(FileInputStream.java:159)

        at android.media.MediaPlayer.setDataSource(MediaPlayer.java:1264)

        at android.media.MediaPlayer.setDataSource(MediaPlayer.java:1208)

        at android.media.MediaPlayer.setDataSource(MediaPlayer.java:1124)

        at android.media.MediaPlayer.setDataSource(MediaPlayer.java:1145)

        at android.widget.VideoView.openVideo(VideoView.java:412)

        at android.widget.VideoView.access$2200(VideoView.java:83)

        at android.widget.VideoView$7.surfaceCreated(VideoView.java:694)

        at android.view.SurfaceView.updateSurface(SurfaceView.java:786)

        at android.view.SurfaceView$2.onPreDraw(SurfaceView.java:162)

        at android.view.ViewTreeObserver.dispatchOnPreDraw(ViewTreeObserver.java:1088)

        at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2944)

        at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1857)

        at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:8089)

        at android.view.Choreographer$CallbackRecord.run(Choreographer.java:1057)

        at android.view.Choreographer.doCallbacks(Choreographer.java:875)

        at android.view.Choreographer.doFrame(Choreographer.java:776)

        at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:1042)

        at android.os.Handler.handleCallback(Handler.java:888)

        at android.os.Handler.dispatchMessage(Handler.java:100)

        at android.os.Looper.loop(Looper.java:213)

        at android.app.ActivityThread.main(ActivityThread.java:8169)

        at java.lang.reflect.Method.invoke(Native Method)

        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:513)

        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1101)

     Caused by: android.system.ErrnoException: open failed: EACCES (Permission denied)

        at libcore.io.Linux.open(Native Method)

        at libcore.io.ForwardingOs.open(ForwardingOs.java:167)

        at libcore.io.BlockGuardOs.open(BlockGuardOs.java:252)

        at libcore.io.ForwardingOs.open(ForwardingOs.java:167)

        at android.app.ActivityThread$AndroidOs.open(ActivityThread.java:8037)

        at libcore.io.IoBridge.open(IoBridge.java:482)

        at java.io.FileInputStream.<init>(FileInputStream.java:159) 

        at android.media.MediaPlayer.setDataSource(MediaPlayer.java:1264) 

        at android.media.MediaPlayer.setDataSource(MediaPlayer.java:1208) 

        at android.media.MediaPlayer.setDataSource(MediaPlayer.java:1124) 

        at android.media.MediaPlayer.setDataSource(MediaPlayer.java:1145) 

        at android.widget.VideoView.openVideo(VideoView.java:412) 

        at android.widget.VideoView.access$2200(VideoView.java:83) 

        at android.widget.VideoView$7.surfaceCreated(VideoView.java:694) 

        at android.view.SurfaceView.updateSurface(SurfaceView.java:786) 

        at android.view.SurfaceView$2.onPreDraw(SurfaceView.java:162) 

        at android.view.ViewTreeObserver.dispatchOnPreDraw(ViewTreeObserver.java:1088) 

        at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2944) 

        at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1857) 

        at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:8089) 

        at android.view.Choreographer$CallbackRecord.run(Choreographer.java:1057) 

        at android.view.Choreographer.doCallbacks(Choreographer.java:875) 

        at android.view.Choreographer.doFrame(Choreographer.java:776) 

        at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:1042) 

        at android.os.Handler.handleCallback(Handler.java:888) 

        at android.os.Handler.dispatchMessage(Handler.java:100) 

        at android.os.Looper.loop(Looper.java:213) 

        at android.app.ActivityThread.main(ActivityThread.java:8169) 

        at java.lang.reflect.Method.invoke(Native Method) 

        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:513) 

        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1101) 

2020-03-15 09:57:30.334 8615-8615/com.example.myapplication D/VideoView: Error: 1,0

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