Android 重新加载 WebView URL onNewToken from Z035489FF8D092741593E4A8324F

Question

我正在运行一个指向 WebApp 的 WebView Android 应用程序。 一切还好。 但是现在，我在刷新 url 时遇到了问题，该 url 在调用FirebaseMessagingService的onNewToken方法时已经加载，并且还向其中注入了一个 JS。 我听说过Intents并且也发现了这个问题，但无法真正理解如何以及在何处应用Intents 。

这是我的代码目前的样子：

MyFirebaseMessagingService ：

package com.example.app;

import android.util.Log;
import com.google.firebase.messaging.FirebaseMessagingService;

public class MyFirebaseMessagingService extends FirebaseMessagingService {

    private static final String TAG = "MyFirebaseMessagingService";

    @Override
    public void onNewToken(String token) {
        Log.d(TAG, "Refreshed token: " + token);
        // I want to call the loadUrl here using a injected JS to send the token to the Web App
    }
}

MyWebViewClient ：

package com.example.app;

import android.content.Intent;
import android.net.Uri;
import android.util.Log;
import android.webkit.WebResourceRequest;
import android.webkit.WebView;
import android.webkit.WebViewClient;

class MyWebViewClient extends WebViewClient {
    private static final String TAG = "MyWebViewClient";

    @Override
    public boolean shouldOverrideUrlLoading(WebView view, WebResourceRequest request) {
        String hostname;

        // YOUR HOSTNAME
        hostname = "192.168.0.11";

        final Uri uri = request.getUrl();
        Log.i(TAG, "Uri =" + uri);
        if (uri.getHost() != null && uri.getHost().endsWith(hostname)) {
            return false;
        }
        Intent intent = new Intent(Intent.ACTION_VIEW, uri);
        view.getContext().startActivity(intent);
        return true;
    }
}

主要活动：

package com.example.app;

import android.annotation.SuppressLint;
import android.app.Activity;
import android.os.Bundle;
import android.webkit.WebSettings;
import android.webkit.WebView;

public class MainActivity extends Activity {

    public WebView mWebView;

    @Override
    @SuppressLint("SetJavaScriptEnabled")
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mWebView = findViewById(R.id.activity_main_webview);
        WebSettings webSettings = mWebView.getSettings();
        webSettings.setJavaScriptEnabled(true);
        webSettings.setDomStorageEnabled(true);
        webSettings.setDatabaseEnabled(true);
        mWebView.setWebViewClient(new MyWebViewClient());

        // REMOTE RESOURCE
         mWebView.loadUrl("http://192.168.0.11:3000/");

        // LOCAL RESOURCE
        // mWebView.loadUrl("file:///android_asset/index.html");
    }

    @Override
    public void onBackPressed() {
        if(mWebView.canGoBack()) {
            mWebView.goBack();
        } else {
            super.onBackPressed();
        }
    }
}

Answer 1

是的，您必须使用 Intents，但首先在“MyFirebaseMessagingService”中使用 LocalBroadcastManager：

public static String REQUEST_ACCEPT="action.my.messaging";

@Override
public void onNewToken(String token) {
    Log.d(TAG, "Refreshed token: " + token);
    //after any refresh you will notice it to your activity (or fragment)
    Intent intent = new Intent(REQUEST_ACCEPT);
    intent.putExtra("key", "Any Extra Value Here");
    LocalBroadcastManager.getInstance(getBaseContext()).sendBroadcast(intent);
}

@Override
public void onMessageReceived(RemoteMessage remoteMessage) {
    //Or use it here after any message received
}

然后在您的活动中，您可以收到任何通知并执行刷新或您想要的任何操作：

@Override
public void onCreate(Bundle savedInstanceState) {

    // registering an observer (mMessageReceiver) to receive Intents
    // with actions named as the value of REQUEST_ACCEPT.
    LocalBroadcastManager.getInstance(this).registerReceiver(mMessageReceiver,
            new IntentFilter(MyFirebaseMessagingService.REQUEST_ACCEPT));
}

// Our handler for received Intents. This will be called whenever an Intent
private BroadcastReceiver mMessageReceiver = new BroadcastReceiver() {
    @Override
    public void onReceive(Context context, Intent intent) {
        // Get extra data included in the Intent
        String value = intent.getStringExtra("key");
        Log.d(TAG, "Got noticed: " + value );
    }
};

@Override
protected void onDestroy() {
    // Unregister since the activity is about to be closed.
    LocalBroadcastManager.getInstance(this).unregisterReceiver(mMessageReceiver);
    super.onDestroy();
}