问题描述
我已经创建了一个自定义内容提供程序,其他一些应用程序可以访问该提供程序.我在提供程序AndroidManifest.xml文件中包含了权限TAG,在第二个应用程序中,我包含了uses-permissions标签,但没有成功. Logcat向我显示:
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 the second application, I included the uses-permissions tag, but no success. Logcat shows me:
java.lang.SecurityException: Permission Denial: opening provider com.company.contentprovider.AplicacaoContentProvider requires READ_DATABASE or WRITE_DATABASE.
我已经搜索了类似的问题,但似乎一切都正确.有任何想法吗 ?谢谢 !!!
I've search on similar questions, but it seems like everything is correct. Any ideas ?Thanks !!!
这是我的提供程序AndroidManifest.xml文件:
Here is my provider AndroidManifest.xml file:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.company.contentprovider"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="17" />
<permission android:name="READ_DATABASE" android:label="@string/app_read" android:protectionLevel="normal"></permission>
<permission android:name="WRITE_DATABASE" android:label="@string/app_write" android:protectionLevel="normal"></permission>
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".CompanyProvider"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<provider android:name="AplicacaoContentProvider"
android:authorities="com.company.contentprovider"
android:exported="true"
android:readPermission="@string/app_read"
android:writePermission="@string/app_write"
/>
</application>
这是我的第二个应用程序AndroidManifest.xml文件:
And this is my second application AndroidManifest.xml file:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.testeprovider"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="16" />
<uses-permission android:name="android.permissions.READ_DATABASE"/>
<uses-permission android:name="android.permissioms.WRITE_DATABASE"/>
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.example.testeprovider.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>
推荐答案
上面的答案让我感到困惑.但是我现在明白了.我也想发布我的解决方案.也许对某人来说更好理解.
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.
第一个应用程序A是具有SQLite数据库和自定义内容提供程序"的应用程序. App B与ContentResolver一起使用App A中的数据库.
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.
这是来自应用程序A的AndroidManifest.xml文件:
This is the AndroidManifest.xml-File from App A:
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="de.test"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk android:minSdkVersion="10" />
<permission android:name="de.test.READ_DATABASE" android:protectionLevel="normal" />
<permission android:name="de.test.WRITE_DATABASE" android:protectionLevel="normal" />
<application
android:debuggable="true"
... >
...
...
<provider
android:name="de.test.TestContentProvider"
android:authorities="de.test.ContentProvider"
android:exported="true"
android:readPermission="de.test.READ_DATABASE"
android:writePermission="de.test.WRITE_DATABASE" />
...
...
</application>
好,这是App B中的AndroidManifest.xml文件.重要的是带有"uses-permission"的部分:
Ok and this is the AndroidManifest.xml-File from App B. Important is the part with "uses-permission":
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="de.test.testercontentprovider"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="15"
android:targetSdkVersion="17" />
<uses-permission android:name="de.test.READ_DATABASE" />
<uses-permission android:name="de.test.WRITE_DATABASE" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="de.test.testercontentprovider.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>
App A的ContentProvider的代码如下:
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;
}
}
以及来自应用B的ContentResolver的代码:
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();
}
}
我希望这可以帮助某人更好地理解它.
I hope this can help someone to understand it better.
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