I’m trying to access media files (music) on the users device to play them; an easy “hello world”-music player app.
I’ve followed some tutorials and they basically give the same code. But it won’t work; it keeps crashing and telling me:
error..... Caused by: java.lang.SecurityException: Permission Denial: reading com.android.providers.media.MediaProvider uri content://media/external/audio/media from pid=27696, uid=10059 requires android.permission.READ_EXTERNAL_STORAGE, or grantUriPermission() ....
Now, this is my manifest file:
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="slimsimapps.troff" > <uses-permission android:name="android.permission.MEDIA_CONTENT_CONTROL"/> <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/> <application android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:theme="@style/AppTheme" > <activity android:name=".MainActivity" android:label="@string/app_name" > <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application> </manifest>
This is my Java-method:
public void initialize() { ContentResolver contentResolver = getContentResolver(); Uri uri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI; Cursor cursor = contentResolver.query(uri, null, null, null, null); if (cursor == null) { // query failed, handle error. } else if (!cursor.moveToFirst()) { // no media on the device } else { do { addSongToXML(cursor); } while (cursor.moveToNext()); } }
I have tried:
To put this at different places in the manifest file:
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE”/>
To add android:maxSdkVersion at Read external storage premission:
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" android:maxSdkVersion="21" />
To put this in the manifest / application / activity-tag:
android:exported=“true”
To put grantUriPremission between uri and cursro in the javamethod:
grantUriPermission(null, uri, Intent.FLAG_GRANT_READ_URI_PERMISSION);
To use this, it won’t crash, but the cursor becomes null:
uri = MediaStore.Audio.Media.getContentUri("EXTERNAL_CONTENT_URI”);
To use INTERNAL content uri, this works as expected, but it only gives “OS-sounds” such as shutter-sound, low-battery-sound, button-click and such:
uri = MediaStore.Audio.Media.INTERNAL_CONTENT_URI;
Pleas help, this should not be a hard problem i know, but i feel like such a beginner!
I have read and tried (or considered them to be not applicable for my problem):
- Android READ_EXTERNAL_STORAGE permission not working
- Require permission only for older android versions: maxSdkVersion does not work?
- Get filename and path from URI from mediastore
- Android KitKat securityException when trying to read from MediaStore
- Android: java.lang.SecurityException: Permission Denial: start Intent
Stack trace:
09-08 06:59:36.619 2009-2009/slimsimapps.troff D/AndroidRuntime﹕ Shutting down VM --------- beginning of crash 09-08 06:59:36.619 2009-2009/slimsimapps.troff E/AndroidRuntime﹕ FATAL EXCEPTION: main Process: slimsimapps.troff, PID: 2009 java.lang.IllegalStateException: Could not execute method for android:onClick at android.view.View$DeclaredOnClickListener.onClick(View.java:4452) at android.view.View.performClick(View.java:5198) at android.view.View$PerformClick.run(View.java:21147) at android.os.Handler.handleCallback(Handler.java:739) at android.os.Handler.dispatchMessage(Handler.java:95) at android.os.Looper.loop(Looper.java:148) at android.app.ActivityThread.main(ActivityThread.java:5417) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) Caused by: java.lang.reflect.InvocationTargetException at java.lang.reflect.Method.invoke(Native Method) at android.view.View$DeclaredOnClickListener.onClick(View.java:4447) at android.view.View.performClick(View.java:5198) at android.view.View$PerformClick.run(View.java:21147) at android.os.Handler.handleCallback(Handler.java:739) at android.os.Handler.dispatchMessage(Handler.java:95) at android.os.Looper.loop(Looper.java:148) at android.app.ActivityThread.main(ActivityThread.java:5417) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) Caused by: java.lang.SecurityException: Permission Denial: reading com.android.providers.media.MediaProvider uri content://media/external/audio/media from pid=2009, uid=10059 requires android.permission.READ_EXTERNAL_STORAGE, or grantUriPermission() at android.os.Parcel.readException(Parcel.java:1599) at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:183) at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:135) at android.content.ContentProviderProxy.query(ContentProviderNative.java:421) at android.content.ContentResolver.query(ContentResolver.java:491) at android.content.ContentResolver.query(ContentResolver.java:434) at slimsimapps.troff.MainActivity.initialize(MainActivity.java:106) at slimsimapps.troff.MainActivity.InitializeExternal(MainActivity.java:80) at java.lang.reflect.Method.invoke(Native Method) at android.view.View$DeclaredOnClickListener.onClick(View.java:4447) at android.view.View.performClick(View.java:5198) at android.view.View$PerformClick.run(View.java:21147) at android.os.Handler.handleCallback(Handler.java:739) at android.os.Handler.dispatchMessage(Handler.java:95) at android.os.Looper.loop(Looper.java:148) at android.app.ActivityThread.main(ActivityThread.java:5417) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) --------- beginning of system
Advertisement
Answer
You have two solutions for your problem. The quick one is to lower targetApi to 22 (build.gradle file). Second is to use new and wonderful ask-for-permission model:
if (checkSelfPermission(Manifest.permission.READ_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) { // Should we show an explanation? if (shouldShowRequestPermissionRationale( Manifest.permission.READ_EXTERNAL_STORAGE)) { // Explain to the user why we need to read the contacts } requestPermissions(new String[]{Manifest.permission.READ_EXTERNAL_STORAGE}, MY_PERMISSIONS_REQUEST_READ_EXTERNAL_STORAGE); // MY_PERMISSIONS_REQUEST_READ_EXTERNAL_STORAGE is an // app-defined int constant that should be quite unique return; }
Sniplet found here: https://developer.android.com/training/permissions/requesting.html
Solutions 2: If it does not work try this:
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M && ContextCompat.checkSelfPermission(this, Manifest.permission.READ_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) { ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.READ_EXTERNAL_STORAGE}, REQUEST_PERMISSION); return;
}
and then in callback
@Override public void onRequestPermissionsResult(final int requestCode, @NonNull final String[] permissions, @NonNull final int[] grantResults) { super.onRequestPermissionsResult(requestCode, permissions, grantResults); if (requestCode == REQUEST_PERMISSION) { if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) { // Permission granted. } else { // User refused to grant permission. } } }
that is from comments. thanks