新手安卓启动接收器报错

Question

java.lang.RuntimeException: Unable to start receiver com.example.broadcastbestpractice.ForceOfflineReceiver: java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity.
错误详情

package com.example.broadcastbestpractice;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;

import android.support.v7.app.AlertDialog;
import android.view.WindowManager;

/**
 * Created by Administrator on 2016/6/15.
 */
public class ForceOfflineReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(final Context context, Intent intent) {
        AlertDialog.Builder dialogBuilder = new AlertDialog.Builder(context);

        dialogBuilder.setTitle("Warning");
        dialogBuilder.setMessage("You are forced to be offline.Please try to login again.");

        dialogBuilder.setCancelable(false);
        dialogBuilder.setPositiveButton("OK", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                ActivityCollector.finishAll();

                Intent intent = new Intent(context,LoginActivity.class);
                intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK);
                context.startActivity(intent);
            }
        });

        AlertDialog alertDialog = dialogBuilder.create();//创建对话框

        //设置对话框类型
        alertDialog.getWindow().setType(WindowManager.LayoutParams.TYPE_SYSTEM_ALERT);
        alertDialog.show();
    }
}

上面是我新建的一个广播接收器。

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.broadcastbestpractice">

    <!-- To auto-complete the email text field in the login form with the user's emails -->
    <uses-permission android:name="android.permission.GET_ACCOUNTS" />
    <uses-permission android:name="android.permission.READ_PROFILE" />
    <uses-permission android:name="android.permission.READ_CONTACTS" />
    <uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW"/>

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".LoginActivity"
            android:label="@string/app_name">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

        <activity android:name=".MainActivity">

        </activity>
        <receiver android:name=".ForceOfflineReceiver">
            <intent-filter>
                <action android:name="com.example.broadcastbestpractice.FORCE_OFFLINE"/>
            </intent-filter>
        </receiver>
    </application>

这是注册文件

Answer 1

你的Activity用的是v7包的AppCompatActivity需要用AppCompatTheme来声明activityTheme