android - 我不能在 onMessageReceived 中使用 AlertDialog

Question

我尝试在 onMessageReceived 中使用 AlertDialog，但出现此错误。

05-04 11:27:40.038 30721-31424/com.xxx.xxx E/AndroidRuntime: FATAL EXCEPTION: pool-4-thread-1
                                                                              Process: com.xxx.xxx, PID: 30721
                                                                              java.lang.RuntimeException: Can't create handler inside thread that has not called Looper.prepare()
                                                                                  at android.os.Handler.<init>(Handler.java:200)
                                                                                  at android.os.Handler.<init>(Handler.java:114)
                                                                                  at android.app.Dialog.<init>(Dialog.java:108)
                                                                                  at android.app.AlertDialog.<init>(AlertDialog.java:125)
                                                                                  at android.app.AlertDialog$Builder.create(AlertDialog.java:967)
                                                                                  at android.app.AlertDialog$Builder.show(AlertDialog.java:986)
                                                                                  at com.xxx.xxx.util.FirebaseMessagingService.optionalAlert(FirebaseMessagingService.java:78)
                                                                                  at com.xxx.xxx.util.FirebaseMessagingService.onMessageReceived(FirebaseMessagingService.java:38)
                                                                                  at com.google.firebase.messaging.FirebaseMessagingService.zzl(Unknown Source)
                                                                                  at com.google.firebase.messaging.FirebaseMessagingService.zzJ(Unknown Source)
                                                                                  at com.google.firebase.messaging.FirebaseMessagingService.handleIntent(Unknown Source)
                                                                                  at com.google.firebase.iid.zzb$1.run(Unknown Source)
                                                                                  at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
                                                                                  at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
                                                                                  at java.lang.Thread.run(Thread.java:818)

这是我的代码:

public class FirebaseMessagingService extends com.google.firebase.messaging.FirebaseMessagingService {

    @Override
    public void onMessageReceived(RemoteMessage remoteMessage) {

        super.onMessageReceived(remoteMessage);
        String msg=remoteMessage.getNotification().getBody();
        Map<String, String> params = remoteMessage.getData();
        String Valuekey = remoteMessage.getData().get("key");

        if (Valuekey.equals("true")) {
            optionalAlert();
        }else {
            Util.Alert(this,getString(R.string.ConsignmentNoFound));
        }

       // Util.Alert(getBaseContext(),msg);
    }

    private void optionalAlert () {


        AlertDialog.Builder adb = new AlertDialog.Builder(this);

        TextView textView = new TextView(this);
        textView.setText(getString(R.string.ConsignmentFound));
        textView.setTextSize(24);
        adb.setCustomTitle(textView);


        //adb.setTitle(getString(R.string.ConsignmentFound));


        adb.setIcon(android.R.drawable.ic_dialog_alert);


        adb.setPositiveButton("Si", new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int which) {

                Intent nextActivity = new Intent(FirebaseMessagingService.this, MainActivity.class);
                nextActivity.putExtra("act", "PinValidate");
                startActivity(nextActivity);

            } });


        adb.setNegativeButton("No", new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int which) {


            } });
        adb.show();
    }

}

Answer 1

这肯定有效

package pkg.name

import pkg.name.DisplayAlert
import android.content.Intent
import com.google.firebase.messaging.FirebaseMessagingService
import com.google.firebase.messaging.RemoteMessage
class CloudMsg:  FirebaseMessagingService() {
    override fun onNewToken(token: String) {}

    override fun onMessageReceived(remoteMessage: RemoteMessage) {
        val mDisplayAlert = Intent(this, DisplayAlert::class.java)
        mDisplayAlert.flags = Intent.FLAG_ACTIVITY_NEW_TASK
        mDisplayAlert.putExtra("title",  remoteMessage.notification?.title)
        mDisplayAlert.putExtra("body",  remoteMessage.notification?.body)
        startActivity(mDisplayAlert)
    }

    override fun onCreate() {}

}

package pkg.name

import android.os.Bundle
import androidx.appcompat.app.AlertDialog
import androidx.appcompat.app.AppCompatActivity

class DisplayAlert : AppCompatActivity() {
    internal var title: String? = null
    internal var body: String? = null
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        b = intent.extras
        if (b != null) {
            title = b!!.getString("title")
            body = b!!.getString("body")
            val builder: AlertDialog.Builder = AlertDialog.Builder(this)
            builder.setTitle(title)
            builder.setIcon(R.drawable.store)
            builder.setMessage(body)
                .setCancelable(false)
                .setPositiveButton("Yes") { dialog, id ->
                    finish()
                }
            val alertDialog = builder.create()
            alertDialog.show()
        }
    }
    companion object {
        var b: Bundle? = null
    }
}

<service
    android:name=".CloudMsg"
    android:exported="false">
    <intent-filter>
        <action android:name="com.google.firebase.MESSAGING_EVENT" />
    </intent-filter>
</service>

<activity
    android:name=".DisplayAlert"
    android:label="@string/app_name"
    android:theme="@style/Total_Translucent">
    <intent-filter>
        <action android:name="android.intent.action.MAIN" />
        <action android:name="android.intent.action.VIEW" />
        <category android:name="android.intent.category.DEFAULT" />
    </intent-filter>
</activity>

<style name="Total_Translucent" parent="Theme.AppCompat.DayNight.NoActionBar">
    <item name="android:windowBackground">@color/transparent</item>
    <item name="android:windowIsTranslucent">true</item>
    <item name="colorPrimaryDark">@color/transparent</item>
</style>

 <color name="transparent">@android:color/transparent</color>