我正在尝试弄清楚如何配置我的VPN应用程序以通过切换从应用程序内部切换Always-On标志。
我知道
DevicePolicyManager#setAlwaysOnVpnPackage
但是，如何使用此功能尚不清楚。我尝试了以下方法：
Admin.java
public class Admin extends DeviceAdminReceiver {
@Override
public void onEnabled(@NonNull Context context, @NonNull Intent intent) {
super.onEnabled(context, intent);
}
}
AdvancedSettings.java
public class AdvancedSettings extends AppCompatActivity
implements View.OnClickListener {
private ComponentName componentName;
private DevicePolicyManager devicePolicyManager;
private boolean alwaysOnConfiguredValue;
private static final int ALWAYS_ON_REQUEST_CODE = 11;
@Override
public void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.settings_advanced);
Button button = findViewById(R.id.toggleAlwaysOnButton);
button.setOnClickListener(this);
devicePolicyManager = (DevicePolicyManager) this
.getSystemService(Context.DEVICE_POLICY_SERVICE);
componentName = new ComponentName(
this.getApplicationContext(), Admin.class);
}
@Override
public void onClick(View v) {
if (v.getId() == R.id.toggleAlwaysOnButton) {
this.setAlwaysOn(true);
}
}
/**
* Handle the Activity Result.
*/
@Override
protected void onActivityResult(
int requestCode, int resultCode, @Nullable Intent data
) {
if (requestCode == ALWAYS_ON_REQUEST_CODE) {
if (resultCode == Activity.RESULT_OK) {
finalizeAlwaysOnToggle();
} else {
Log.w(
"Invalid result code " + resultCode
);
}
}
super.onActivityResult(requestCode, resultCode, data);
}
/**
* Start the process of enabling "Always On" for the VPN.
*
* @param boolean value
*/
private void setAlwaysOn(boolean value) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
alwaysOnConfiguredValue = value;
if (devicePolicyManager.isAdminActive(componentName)) {
finalizeAlwaysOnToggle();
return;
}
requestAdminAccess();
} else {
Toas.makeText(this, "Not supported", Toast.LENGTH_LONG).show();
}
}
/**
* Request Admin Access for this application
* if it has not already been done.
*/
private void requestAdminAccess() {
Intent intent = new Intent(DevicePolicyManager.ACTION_ADD_DEVICE_ADMIN);
intent.putExtra(DevicePolicyManager.EXTRA_DEVICE_ADMIN, componentName);
intent.putExtra(
DevicePolicyManager.EXTRA_ADD_EXPLANATION,
"This is required to modify the Always-On Feature from within the Test Application."
);
this.startActivityForResult(intent, ALWAYS_ON_REQUEST_CODE);
}
/**
* Finalize setting the always on toggle after the Admin Access
* has been granted for this application.
*/
private void finalizeAlwaysOnToggle() {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
try {
if (devicePolicyManager.isAdminActive(componentName)) {
devicePolicyManager.setAlwaysOnVpnPackage(
componentName, (alwaysOnConfiguredValue) ? "com.myapp" : null, true
);
} else {
Log.e(
"Device Policy Manager Admin is not yet active while " +
"trying to finalize changes to AlwaysOnToggle."
);
}
} catch (PackageManager.NameNotFoundException e) {
Log.e("Unable to set always on vpn due to NameNotFound Exception.", e);
}
}
}
}
它很好地处理了添加设备管理员的请求，但是在完成之后，当它运行finalizeAlwaysOnToggle()时，在调用devicePolicyManager.setAlwaysOnVpnPackage的过程中，我收到以下错误消息：
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.myapp, PID: 30778
java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=11, result=-1, data=null} to activity {com.myapp/com.myapp.ui.settings.AdvancedSettings}: java.lang.SecurityException: Admin ComponentInfo{com.myapp/com.myapp.provider.Admin} does not own the profile
答案 0 :(得分：0)
您必须区分“设备管理员”，“设备所有者”和“配置文件所有者”。
如文档中所述，您需要成为后两者之一才能调用setAlwaysOnVpnPackage：
由设备或配置文件所有者调用以配置始终在线的VPN 通过特定应用程序连接当前用户。这个 重新连接后，系统会自动授予并保留连接。