Android简易媒体播放器开发报错求助：VideoView无法播放视频

Hey there, let's break down why you're hitting this playback error. Looking at your logcat output, the critical line that tells us what's wrong is:

java.io.FileNotFoundException: No content provider: /document/primary:WhatsApp/Media/WhatsApp Video/VID-20191031-WA0041.mp4

What's causing the issue? #

When you use Intent.ACTION_GET_CONTENT to pick a file, the Uri returned by data.getData() isn't a direct file system path—it's a Content Provider URI (typically starting with content://). Calling getPath() on this Uri only gives you a fragment of that URI, not the actual location of the file on the device. When you try to parse that string back into a Uri with Uri.parse(PathHolder), the system can't find a valid content provider to access the file, hence the error.

The Simple Fix #

You don't need to convert the Uri to a string path at all. Just use the original Uri directly with VideoView.setVideoURI(). Here's your corrected onActivityResult method:

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    switch (requestCode) {
        case 7:
            if (resultCode == RESULT_OK) {
                // Use the original Uri directly, no need for getPath()
                Uri videoUri = data.getData();
                Toast.makeText(this, videoUri.toString(), Toast.LENGTH_SHORT).show();
                setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
                videoPlayer.setVideoURI(videoUri);
                videoPlayer.requestFocus();
                videoPlayer.start();
            }
            break;
    }
}

Extra Debugging Tip #

To make it easier to diagnose future playback issues, add an error listener to your VideoView—this will give you specific details if something goes wrong:

videoPlayer.setOnErrorListener((mediaPlayer, what, extra) -> {
    Toast.makeText(this, "Playback error: Code " + what + ", Extra " + extra, Toast.LENGTH_LONG).show();
    return true;
});

Also, keep in mind that on Android 10 (API 29) and above, direct access to file paths is restricted—using Content Uris is the recommended (and required) way to interact with user-selected files, so this fix aligns with modern Android best practices.

Your Original Code (for reference) #

PlayerActivity.java

import androidx.appcompat.app.AppCompatActivity;
import android.content.Intent;
import android.content.pm.ActivityInfo;
import android.net.Uri;
import android.os.Bundle;
import android.widget.Toast;
import android.widget.VideoView;
public class PlayerActivity extends AppCompatActivity {
VideoView videoPlayer;
@Override
protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_main);
 videoPlayer = findViewById(R.id.videoView);
 Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
 intent.setType("*/*");
 startActivityForResult(intent, 7);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
 super.onActivityResult(requestCode, resultCode, data);
 switch (requestCode) {
 case 7:
 if (resultCode == RESULT_OK) {
 String PathHolder = data.getData().getPath();
 Toast.makeText(this, PathHolder, Toast.LENGTH_SHORT).show();
 setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
 videoPlayer.setVideoURI(Uri.parse(PathHolder));
 videoPlayer.requestFocus();
 videoPlayer.start();
 }
 }
}
}

activity_main.xml

<androidx.constraintlayout.widget.ConstraintLayout xmlns:tools="http://schemas.android.com/tools"
 android:layout_height="match_parent"
 xmlns:android="http://schemas.android.com/apk/res/android"
 android:layout_width="match_parent">
 <VideoView
 android:id="@+id/videoView"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 tools:layout_editor_absoluteX="318dp"
 tools:layout_editor_absoluteY="716dp"
 />
</androidx.constraintlayout.widget.ConstraintLayout>

Logcat Error

2020-08-09 12:55:37.585 21894-21894/com.phantom.player W/MediaPlayer: Couldn't open /document/primary:WhatsApp/Media/WhatsApp Video/VID-20191031-WA0041.mp4
java.io.FileNotFoundException: No content provider: /document/primary:WhatsApp/Media/WhatsApp Video/VID-20191031-WA0041.mp4
 at android.content.ContentResolver.openTypedAssetFileDescriptor(ContentResolver.java:1680)
 at android.content.ContentResolver.openAssetFileDescriptor(ContentResolver.java:1510)
 at android.content.ContentResolver.openAssetFileDescriptor(ContentResolver.java:1427)
 at android.media.MediaPlayer.attemptDataSource(MediaPlayer.java:1149)
 at android.media.MediaPlayer.setDataSource(MediaPlayer.java:1121)
 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:926)
 at android.view.SurfaceView.windowStopped(SurfaceView.java:315)
 at android.view.ViewRootImpl.setWindowStopped(ViewRootImpl.java:1973)
 at android.view.WindowManagerGlobal.setStoppedState(WindowManagerGlobal.java:709)
 at android.app.Activity.performRestart(Activity.java:8039)
 at android.app.ActivityThread.handleSleeping(ActivityThread.java:5007)
 at android.app.ActivityThread.access$2500(ActivityThread.java:268)
 at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2080)
 at android.os.Handler.dispatchMessage(Handler.java:107)
 at android.os.Looper.loop(Looper.java:237)
 at android.app.ActivityThread.main(ActivityThread.java:7807)
 at java.lang.reflect.Method.invoke(Native Method)
 at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
 at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1047)

内容的提问来源于stack exchange，提问作者ADP