如何从通知中的PendingIntent转到活动Android Java

如何解决如何从通知中的PendingIntent转到活动Android Java

我有两个根据逻辑开始的活动。角色检查和活动发现成功！一切正常！当角色更改时，问题将在下一刻开始！单击通知后，如何打开上次打开的 MainActivity->用户或 MainActivity->管理员？重要条件！活动不得再次创建！并且在后台有一个应用程序然后创建一个新活动！

public static class MainActivity extends AppCompatActivity {

    public static class User extends MainActivity {
        @Override
        protected void onCreate(@Nullable Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            Toast.makeText(this,"User role",Toast.LENGTH_LONG).show();
        }
    }

    public static class Admin extends MainActivity {
        @Override
        protected void onCreate(@Nullable Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            Toast.makeText(this,"Admin role",Toast.LENGTH_LONG).show();
        }
    }

}

在打开应用程序并选择了上一个保存的角色后，此处的逻辑起作用了！然后根据角色开始活动！

public static class AuthActivity extends AppCompatActivity {
        @Override
        protected void onCreate(@Nullable Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);

            // Here the future role is determined (logic is not important)
            boolean isAdmin = new Random().nextInt() % 2 == 0;

            // Run activity to front
            startActivity(new Intent(this,isAdmin ? MainActivity.Admin.class : MainActivity.User.class));
            finish();

            // MainActivity is running...

        }
    }

最后。

public static class FirebaseService extends FirebaseMessagingService {
    @Override
    public void onMessageReceived(@NonNull RemoteMessage remoteMessage) {

        // Attention!
        // Attention!
        // Attention!
        // If the activity was started !!! It should ONLY update onNewIntent (Intent intent) !!! Otherwise they must be re-created!
        Intent intent = new Intent(getApplicationContext(),null /* What is there to write in this script? */);

        PendingIntent pendingIntent = PendingIntent.getActivity(getApplicationContext(),null,PendingIntent.FLAG_UPDATE_CURRENT);
        // Standard show notification (skip)!

        super.onMessageReceived(remoteMessage);
    }
}