Permission denial: opening provider

Question

I\'ve created a custom content provider, which will be accessed by a few more applications. I\'ve included the permission TAG in my provider AndroidManifest.xml file, and in

Answer 1

The answer above was a litle confusing for me. But I got it now. I want to post my solution as well. Maybe for someone it's more better to understand.

First App A is the App that has the SQLite-Database and the "Custom Content Provider". App B uses with a ContentResolver the databse from App A.

This is the AndroidManifest.xml-File from App A:

    ...
    ...
    
    ...
    ...

Ok and this is the AndroidManifest.xml-File from App B. Important is the part with "uses-permission":

And the Code of the ContentProvider for App A looks like this:

public class TestContentProvider extends ContentProvider {

public static final String AUTHORITY = "de.test.TestContentProvider";

public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY
        + "/" + "nameoftable");


@Override
public boolean onCreate() {
    ...
    return true;
}

@Override
public Cursor query(Uri uri, String[] projection, String selection,
        String[] selectionArgs, String sortOrder) {
    // TODO Auto-generated method stub
            return null;
}

@Override
public int update(Uri uri, ContentValues values, String selection,
        String[] selectionArgs) {
    // TODO Auto-generated method stub
    return 0;
}

@Override
public int delete(Uri uri, String selection, String[] selectionArgs) {
    // TODO Auto-generated method stub
    return 0;
}

@Override
public Uri insert(Uri uri, ContentValues values) {
    // TODO Auto-generated method stub
    return null;
}

@Override
public String getType(Uri uri) {
    // TODO Auto-generated method stub
    return null;
}
}

And the Code for the ContentResolver from App B:

public class MainActivity extends Activity {

private static final String TAG = MainActivity.class.getSimpleName();
public static final String AUTHORITY = "de.test.TestContentProvider";
public static final String TABLE_NAME = "nameoftable";

    ...

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    ContentResolver cr = getContentResolver();

    // show entries of db
    listEntries(cr);
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
}

private void listEntries(ContentResolver cr) {
    Uri uri = Uri.parse("content://" + AUTHORITY + "/" + TABLE_NAME);
    Cursor c = cr.query(uri, null, null, null, null);

    if (c == null) {
        Log.d(TAG, "Cursor c == null.");
        return;
    }
    while (c.moveToNext()) {
        String column1 = c.getString(0);
        String column2 = c.getString(1);
        String column3 = c.getString(2);

        Log.d(TAG, "column1=" + column1 + " column2=" + column2 + " column3=" + column3);
    }
    c.close();
}
}

I hope this can help someone to understand it better.