Oreo +中的SMS广播接收器 [英] SMS Broadcast Receiver in Oreo+

问题描述

我正在尝试拦截传递到我的设备的SMS消息。我写了一个应用程序大约一年前就这样做了，但我发现它不再捕获消息（即使代码未更改）。

I am trying to intercept SMS messages delivered to my device. I wrote an app to do that a year or so ago, and I find it is no longer catching messages (even though code is unchanged).

我不相信它与许可相关。我尝试在SDK 23（需要运行时权限）和SDK 22（没有运行时权限）下进行编译。 （对于23岁，我验证了已成功授予RECEIVE_SMS权限。）

I don't believe it is permission-related. I tried compiling under SDK 23 (requiring runtime permissions) and SDK 22 (no runtime permissions). (In the case of 23, I verified that permission RECEIVE_SMS is successfully granted).

关于此问题的大多数问题/答案都已经很老了。恕我直言，答案似乎并不明智，例如添加BROADCAST_SMS权限，调用本机代码等。

Most questions/answers about this issue are quite old. IMHO The answers didn't seem enlightened, e.g. adding BROADCAST_SMS permission, invoking native code, etc.

我的方法是实现广播接收器。以下代码除外。

My approach was to implement a broadcast receiver. Code excepts below.

广播接收器

//  SmsRecv.java - SMS Receiver    

package com.ramrod.SmsReceiver;

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

public class SmsRecv extends BroadcastReceiver {

    //@ Handler for received sms messages
    @Override
    public void onReceive(
        Context ctx,
        Intent intent)
    {    
        // NEVER REACHED!
        Main.toast( "SMS RECEIVED." );
        // PROCESS MESSAGE HERE...    
    }

清单

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="com.ramrod.SmsReceiver"
      android:versionCode="100"
      android:versionName="1.00">

    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.READ_SMS" />
    <uses-permission android:name="android.permission.RECEIVE_SMS" />

    <application
      android:icon="@drawable/icon"
      android:label="SmsReceiver"
      android:theme="@android:style/Theme"
    >
      <activity android:name=".Main"
            android:label="SmsReceiver"
          >
          <intent-filter>
              <action android:name="android.intent.action.MAIN" />
              <category android:name="android.intent.category.LAUNCHER" />
          </intent-filter>
      </activity>

      <receiver android:name=".SmsRecv"
          android:exported="true"
          android:enabled="true"
          >
          <intent-filter android:priority="999999" >
              <action android:name="android.provider.Telephony.SMS_RECEIVED" />
          </intent-filter>
      </receiver>

    </application>
</manifest>

BUILD.GRADLE

BUILD.GRADLE

apply plugin: 'com.android.application'

android {
    compileSdkVersion 23
    buildToolsVersion "27.0.3"

    defaultConfig {
        applicationId "com.ramrod.SmsReceiver"
        minSdkVersion 23
        targetSdkVersion 23
    }
    ...

已在运行Oreo V8.0.0的Samsung S7上进行了测试。我通过从另一部手机发送短信来对此进行了测试。这些被正确接收，但从未触发SmsRecv（）。

Tested on Samsung S7 running Oreo V8.0.0. I tested this by sending text messages from another phone. These were received correctly but never triggered SmsRecv().

在我的阅读中，我遇到了这样的概念，即 now SMS广播接收器将不再除非它是设备上的默认SMS应用程序，否则它就可以工作（是吗？）。

In my reading, I encountered the notion that now an SMS broadcast receiver will no longer work unless it is the default SMS app on the device (huh?).

任何建议都值得赞赏。

推荐答案

我终于弄清楚出了什么问题。显然，Android版本Oreo +不再提供隐式广播*（即，清单文件< receiver>中指定的广播）。现在，您必须在代码中显式注册接收者（即，使用 registerReceiver（））。

I finally figured out what was wrong. Apparently, Android version Oreo+ does not deliver implicit broadcasts any more* (i.e., those specified in the manifest file <receiver>). You now must explicitly register your receiver (i.e., with registerReceiver()) in your code.

（*注：Mike M正确指出，根据Android文档，已将接收的SMS广播排除在此限制之外，但实际上对我而言并非如此）。

(*Note: Mike M correctly pointed out that received SMS broadcasts are excluded from this restriction according to Android doc, but nonetheless this was not so for me in practice).

所以我要做的是：

• 完全删除< ; receiver>从清单。



• 在我的活动onCreate（）中创建接收者实例和intentFilter；

• Completely Remove <receiver> from manifest.

• Create an instance of my receiver and an intentFilter in my activities onCreate();

    MyReceiver = new SmsRecv();
    MyFilter   = new IntentFilter(Telephony.Sms.Intents.SMS_RECEIVED_ACTION );  

在活动的onResume（）中注册接收者。

Register the receiver in my Activity's onResume().

    i = registerReceiver( MyReceiver, MyFilter);  

在活动的onPause（）中取消注册接收者。 （这是防止泄漏所必需的）。

Unregister the receiver in my Activity's onPause(). (This is neccessary to prevent leaks).

    unregisterReceiver( MyReceiver );

通过更改，该应用程序可以完美运行。

With the changes, the app worked perfectly.

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