Android sqlExcetion Eröffnung db: Berechtigung verweigert JDBC

Question

Ich versuche, SQLite-Datenbank in Android (API 25) zu erstellen und zu verwenden. Ich erteile die Genehmigung in Manifest. Ich denke, vielleicht gibt es ein Problem mit dem Datenbankpfad. Aber ich kann leider nicht dieses Problem lösen ...

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/> 
    <uses-permission android:name="android.permissio8n.READ_EXTERNAL_STORAGE"/> 

Es gibt Datenbank Öffnungscode

String db = "jdbc:sqlite:" + Environment.getDataDirectory().getAbsolutePath() + "/MyDatabase.db"; 
     Class.forName("org.sqlite.JDBC"); 

Aber es gibt einige Fehler in Bezug auf Berechtigungen

06-05 21:05:35.962 3698-3698/com.example.user.app W/System.err: java.sql.SQLException: opening db: '/data/MyDatabase.db': Permission denied 
06-05 21:05:35.962 3698-3698/com.example.user.app W/System.err:  at org.sqlite.core.CoreConnection.open(CoreConnection.java:203) 
06-05 21:05:35.962 3698-3698/com.example.user.app W/System.err:  at org.sqlite.core.CoreConnection.<init>(CoreConnection.java:76) 
06-05 21:05:35.962 3698-3698/com.example.user.app W/System.err:  at org.sqlite.jdbc3.JDBC3Connection.<init>(JDBC3Connection.java:24) 
06-05 21:05:35.962 3698-3698/com.example.user.app W/System.err:  at org.sqlite.jdbc4.JDBC4Connection.<init>(JDBC4Connection.java:23) 
06-05 21:05:35.962 3698-3698/com.example.user.app W/System.err:  at org.sqlite.SQLiteConnection.<init>(SQLiteConnection.java:45) 
06-05 21:05:35.962 3698-3698/com.example.user.app W/System.err:  at org.sqlite.JDBC.createConnection(JDBC.java:114) 
06-05 21:05:35.962 3698-3698/com.example.user.app W/System.err:  at org.sqlite.JDBC.connect(JDBC.java:88) 
06-05 21:05:35.962 3698-3698/com.example.user.app W/System.err:  at java.sql.DriverManager.getConnection(DriverManager.java:569) 
06-05 21:05:35.962 3698-3698/com.example.user.app W/System.err:  at java.sql.DriverManager.getConnection(DriverManager.java:237) 
06-05 21:05:35.962 3698-3698/com.example.user.app W/System.err:  at com.example.user.app.DB.openDbConnection(DB.java:33) 
06-05 21:05:35.962 3698-3698/com.example.user.app W/System.err:  at com.example.user.app.Helpers.isTableIsEmpty(Helpers.java:24) 
06-05 21:05:35.962 3698-3698/com.example.user.app W/System.err:  at com.example.user.app.activity.BachelorITFCourses1.onCreate(BachelorITFCourses1.java:42) 
06-05 21:05:35.962 3698-3698/com.example.user.app W/System.err:  at android.app.Activity.performCreate(Activity.java:6679) 
06-05 21:05:35.962 3698-3698/com.example.user.app W/System.err:  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1118) 
06-05 21:05:35.962 3698-3698/com.example.user.app W/System.err:  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2618) 
06-05 21:05:35.963 3698-3698/com.example.user.app W/System.err:  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2726) 
06-05 21:05:35.963 3698-3698/com.example.user.app W/System.err:  at android.app.ActivityThread.-wrap12(ActivityThread.java) 
06-05 21:05:35.963 3698-3698/com.example.user.app W/System.err:  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1477) 
06-05 21:05:35.963 3698-3698/com.example.user.app W/System.err:  at android.os.Handler.dispatchMessage(Handler.java:102) 
06-05 21:05:35.963 3698-3698/com.example.user.app W/System.err:  at android.os.Looper.loop(Looper.java:154) 
06-05 21:05:35.963 3698-3698/com.example.user.app W/System.err:  at android.app.ActivityThread.main(ActivityThread.java:6119) 
06-05 21:05:35.963 3698-3698/com.example.user.app W/System.err:  at java.lang.reflect.Method.invoke(Native Method) 
06-05 21:05:35.963 3698-3698/com.example.user.app W/System.err:  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886) 
06-05 21:05:35.963 3698-3698/com.example.user.app W/System.err:  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776) 

P. S. Ich habe spezielle Klasse DB für dtabase Aktionen.

Answer 1

Die 8 in Erlaubnis ... READ ist falsch oder? Und fordern Sie die Berechtigungen? Ich denke, das Schreiben und Lesen von externem Speicher ist kritisch und muss angefordert werden: https://developer.android.com/training/permissions/requesting.html

Answer 2

Sie denken also, ich muss die Berechtigungen anfordern, die ich brauche? Etwas wie das?

if (ContextCompat.checkSelfPermission(thisActivity, 
       Manifest.permission.READ_CONTACTS) 
     != PackageManager.PERMISSION_GRANTED) { 

    if (ActivityCompat.shouldShowRequestPermissionRationale(thisActivity, 
      Manifest.permission.READ_CONTACTS)) { 

     // Show an explanation to the user *asynchronously* -- don't block 
     // this thread waiting for the user's response! After the user 
     // sees the explanation, try again to request the permission. 

    } else { 

     // No explanation needed, we can request the permission. 

     ActivityCompat.requestPermissions(thisActivity, 
       new String[]{Manifest.permission.READ_CONTACTS}, 
       MY_PERMISSIONS_REQUEST_READ_CONTACTS); 

     // MY_PERMISSIONS_REQUEST_READ_CONTACTS is an 
     // app-defined int constant. The callback method gets the 
     // result of the request. 
    } 
}