android - 以编程方式设置永远在线的 VPN， "Admin does not own the profile"

Question

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

但是这个函数怎么用还不是很清楚。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 期间我收到以下错误:

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

Answer 1

您必须区分“设备管理员”、“设备所有者”和“配置文件所有者”。正如文档中所述，您需要成为后两者之一才能调用 setAlwaysOnVpnPackage:

Called by a device or profile owner to configure an always-on VPN connection through a specific application for the current user. This connection is automatically granted and persisted after a reboot.

( https://developer.android.com/reference/android/app/admin/DevicePolicyManager.html#setAlwaysOnVpnPackage(android.content.ComponentName,%2520java.lang.String,%2520boolean) )