Я пытаюсь создать мобильное приложение для управления APN (имя точки доступа) . Во-первых, мне нужно добавить APN в мобильное приложение. Я следовал этой документации.
https://developer.android.com/reference/android/telephony/data/ApnSetting.Builder
Я сделал следующее.
package com.example.myapplication;
import android.app.admin.DevicePolicyManager;
import android.content.ComponentName;
import android.content.Context;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.telephony.data.ApnSetting;
import android.util.Log;
import androidx.annotation.RequiresApi;
import androidx.appcompat.app.AppCompatActivity;
import java.net.InetAddress;
import java.net.UnknownHostException;
public class MainActivity extends AppCompatActivity {
private static String TAG = "MainActivity";
@RequiresApi(api = Build.VERSION_CODES.P)
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Create an MMS proxy address with a hostname. A network might not be
// available, so supply a dummy (0.0.0.0) IPv4 address to avoid DNS lookup.
String host = "mms.example.com";
byte[] ipAddress = new byte[4];
InetAddress mmsProxy;
try {
mmsProxy = InetAddress.getByAddress(host, ipAddress);
} catch (UnknownHostException e) {
e.printStackTrace();
return;
}
ApnSetting apn=null;
try{
apn = new ApnSetting.Builder()
.setApnTypeBitmask(ApnSetting.TYPE_DEFAULT | ApnSetting.TYPE_MMS)
.setApnName("apn.example.com")
.setEntryName("Example Carrier APN")
.setMmsc(Uri.parse("http://mms.example.com:8002"))
.setMmsProxyAddress(mmsProxy)
.setMmsProxyPort(8799)
.build();
}catch (NoClassDefFoundError error){
error.printStackTrace();
}
ComponentName componentName = new ComponentName(this, MainActivity.class);
DevicePolicyManager devicePolicyManager = (DevicePolicyManager) getApplicationContext().getSystemService(Context.DEVICE_POLICY_SERVICE);
devicePolicyManager.addOverrideApn(componentName,apn);
}
}
Но он получает следующую ошибку.
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.myapplication, PID: 24556
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.myapplication/com.example.myapplication.MainActivity}: java.lang.SecurityException: No active admin ComponentInfo{com.example.myapplication/com.example.myapplication.MainActivity}
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3160)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3303)
at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78)
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1991)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:216)
at android.app.ActivityThread.main(ActivityThread.java:7258)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:494)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:975)
Caused by: java.lang.SecurityException: No active admin ComponentInfo{com.example.myapplication/com.example.myapplication.MainActivity}
at android.os.Parcel.createException(Parcel.java:1966)
at android.os.Parcel.readException(Parcel.java:1934)
at android.os.Parcel.readException(Parcel.java:1884)
at android.app.admin.IDevicePolicyManager$Stub$Proxy.addOverrideApn(IDevicePolicyManager.java:11791)
at android.app.admin.DevicePolicyManager.addOverrideApn(DevicePolicyManager.java:10785)
at com.example.myapplication.MainActivity.onCreate(MainActivity.java:54)
at android.app.Activity.performCreate(Activity.java:7353)
at android.app.Activity.performCreate(Activity.java:7344)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1275)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3140)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3303)
at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78)
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1991)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:216)
at android.app.ActivityThread.main(ActivityThread.java:7258)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:494)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:975)
Caused by: android.os.RemoteException: Remote stack trace:
at com.android.server.devicepolicy.DevicePolicyManagerService.getActiveAdminWithPolicyForUidLocked(DevicePolicyManagerService.java:3080)
at com.android.server.devicepolicy.DevicePolicyManagerService.getActiveAdminForCallerLocked(DevicePolicyManagerService.java:3017)
at com.android.server.devicepolicy.DevicePolicyManagerService.addOverrideApn(DevicePolicyManagerService.java:14120)
at android.app.admin.IDevicePolicyManager$Stub.onTransact(IDevicePolicyManager.java:4339)
at android.os.Binder.execTransact(Binder.java:739)
Process 24556 terminated.
Ошибка, возникающая в следующей строке.
devicePolicyManager.addOverrideApn(componentName,apn);
Насколько мне известно, мне нужно использовать метод addOverrideApn () для создания этого мобильного приложения. Так что я должен сделать для этого?