奥利奥：广播接收器无法正常工作 [英] Oreo: Broadcast receiver Not working
问题描述
每当用户拨打新电话时，我都试图在应用程序上获取通知触发器。我正在活动中注册接收者，并在onDestroy（）方法中销毁了它。以下是用于注册
I was trying to get notification trigger on my application whenever the user makes a new call. I'm registering receiver in my activity and destroying it in onDestroy() method. Following is the code snippets for registering
registerReceiver(inComingCall = new IncomingCall(),new IntentFilter("android.intent.action.PHONE_STATE"));
我面临的问题是我没有在覆盖onReceive（）方法中获得任何触发器广播接收器。请让我知道是否有任何新的实现方式或我应该采取的单独方法来接收广播，尤其是对于Oreo。
The issue I'm facing is I'm not getting any trigger in override onReceive() method for the Broadcast receiver. Kindly let me know whether any new implementations or the separate way I should do for receiving the broadcast especially for Oreo.
谢谢。
推荐答案
我很久以前就遇到了这个问题。并且每个人都会为您提供一个指向Google开发人员网站的链接，该链接只描述了他们对后台服务的限制；没有适当的文档，也没有示例代码向开发人员展示如何在Oreo或更高版本上实现它。即使在堆栈溢出的情况下，您也只能找到限制访问google开发人员网站的链接。
I faced this issue for a long time. And every one will provide you a link to google developers site, which describes nothing than how they are having limits on background services; with no proper documentation and no sample code showing developers, how to implement it on Oreo or Higher. Even on stack-Overflow you will find only links to the google developers site on limitations.
我希望您或其他开发人员会发现这对您很有帮助。
I hope you or some other developer will find this very helpful.
仍有一些例外情况，例如 NEW_OUTGOING_CALL 或 BOOT_COMPLETED 仍可以在清单中使用。但是在应用程序上下文中实现运行时是一个好习惯。我希望我的 PHONE_STATE 随时准备接听和拨出电话。也是在每次重新启动...
There are still some exclusions like NEW_OUTGOING_CALL OR BOOT_COMPLETED which you can still use in manifest. But its a good practise to implement runtime at application context. I wanted my PHONE_STATE ready always for getting incoming and outgoing calls; On every reboot too...
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.rushi.boottest">
<uses-sdk
android:minSdkVersion="16"
android:targetSdkVersion="26" />
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
<uses-permission android:name="android.permission.PROCESS_OUTGOING_CALLS" />
<uses-permission android:name="android.permission.READ_PHONE_STATE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<receiver
android:name=".MyReceiver"
android:enabled="true"
android:exported="true">
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED" />
</intent-filter>
</receiver>
<service
android:name=".CatchNumbers"
android:enabled="true"
android:exported="true" />
<service
android:name=".WatchMan"
android:enabled="true"
android:exported="true"></service>
</application>
</manifest>
在上述manifest.xml中，我没有放置 WRITE_EXTERNAL_STORAGE 和 READ_EXTERNAL_STORAGE 。
这是我的OnBoot接收器：
Here is my OnBoot Receiver :
package com.example.rushi.boottest;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.os.Build;
import android.util.Log;
import android.widget.Toast;
public class MyReceiver extends BroadcastReceiver
{
@Override
public void onReceive(Context context, Intent intent)
{
Log.d("BootTest : ", "\nOnBootReceiver - Received a broadcast!");
Toast.makeText(context, "OnBootReceiver Received a broadcast!!", Toast.LENGTH_LONG).show();
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O)
{
context.startForegroundService(new Intent(context, WatchMan.class));
}
else
{
context.startService(new Intent(context, WatchMan.class));
}
}
}
这里是WatchMan.java，它是一个实现接收器运行时的前台服务
Here is WatchMan.java a foreground service that implements receivers runtime
public class WatchMan extends Service
{
NotificationManager mNotifyManager;
NotificationCompat.Builder mBuilder;
NotificationChannel notificationChannel;
String NOTIFICATION_CHANNEL_ID = "17";
private BroadcastReceiver mCallBroadcastReceiver = new BroadcastReceiver()
{
@Override
public void onReceive(Context context, Intent intent)
{
String PhoneNumber = "UNKNOWN";
Log.d("RECEIVER : ","IS UP AGAIN....");
try
{
String state = intent.getStringExtra(TelephonyManager.EXTRA_STATE);
if(state == null)
{
PhoneNumber = "UNKNOWN";
}
else if (state.equals(TelephonyManager.EXTRA_STATE_RINGING))
{
PhoneNumber = intent.getStringExtra(TelephonyManager.EXTRA_INCOMING_NUMBER);
Log.d("RECEIVER : ","Incoming number : "+PhoneNumber);
}
if(intent.getAction().equals("android.intent.action.NEW_OUTGOING_CALL"))
{
PhoneNumber = intent.getStringExtra(Intent.EXTRA_PHONE_NUMBER);
Log.d("RECEIVER : ","Outgoing number : "+PhoneNumber);
}
if(!PhoneNumber.contentEquals("UNKNOWN"))
{
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O)
{
context.startForegroundService(new Intent(context, CatchNumbers.class));
}
else
{
context.startService(new Intent(context, CatchNumbers.class));
}
}
}
catch (Exception e)
{
e.printStackTrace();
Log.e("RECEIVER : ", "Exception is : ", e);
}
}
};
public WatchMan() { }
@Override
public void onCreate()
{
super.onCreate();
Log.d("WatchMan : ", "\nOnCreate...");
IntentFilter CallFilter = new IntentFilter();
CallFilter.addAction("android.intent.action.NEW_OUTGOING_CALL");
CallFilter.addAction("android.intent.action.PHONE_STATE");
this.registerReceiver(mCallBroadcastReceiver, CallFilter);
Log.d("WatchMan : ", "\nmCallBroadcastReceiver Created....");
mNotifyManager = (NotificationManager) getApplicationContext().getSystemService(NOTIFICATION_SERVICE);
mBuilder = new NotificationCompat.Builder(this, null);
mBuilder.setContentTitle("Insta Promo")
.setContentText("Checking New Numbers")
.setTicker("Checking New Numbers")
.setSmallIcon(R.drawable.ic_launcher_background)
.setPriority(Notification.PRIORITY_LOW)
.setDefaults(Notification.DEFAULT_ALL)
.setVisibility(Notification.VISIBILITY_PUBLIC)
.setOngoing(true)
.setAutoCancel(false);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O)
{
notificationChannel = new NotificationChannel(NOTIFICATION_CHANNEL_ID, "My Notifications", NotificationManager.IMPORTANCE_HIGH);
// Configure the notification channel.
notificationChannel.setDescription("Channel description");
notificationChannel.enableLights(true);
notificationChannel.setLightColor(Color.RED);
notificationChannel.setVibrationPattern(new long[]{0, 1000, 500, 1000});
notificationChannel.enableVibration(true);
notificationChannel.setLockscreenVisibility(Notification.VISIBILITY_PUBLIC);
mNotifyManager.createNotificationChannel(notificationChannel);
mBuilder.setChannelId(NOTIFICATION_CHANNEL_ID);
startForeground(17, mBuilder.build());
}
else
{
mBuilder.setChannelId(NOTIFICATION_CHANNEL_ID);
//startForeground(17, mBuilder.build());
mNotifyManager.notify(17, mBuilder.build());
}
}
@Override
public int onStartCommand(Intent intent, int flags, int startId)
{
Log.d("WatchMan : ", "\nmCallBroadcastReceiver Listening....");
//return super.onStartCommand(intent, flags, startId);
return START_NOT_STICKY;
}
@Override
public void onDestroy()
{
this.unregisterReceiver(mCallBroadcastReceiver);
Log.d("WatchMan : ", "\nDestroyed....");
Log.d("WatchMan : ", "\nWill be created again....");
}
@Override
public IBinder onBind(Intent intent)
{
// TODO: Return the communication channel to the service.
throw new UnsupportedOperationException("Not yet implemented");
}
}
现在在接收器中打电话之前，将电话号码插入 sqlite 数据库表中；这样您就可以从CatchNumbers.java服务中读取它，并对传入和传出的号码执行所需的任何操作。希望它对您或其他人有帮助
Now in the receiver before calling insert phone numbers into sqlite database table; so that you can read it from CatchNumbers.java service and perform whatever actions you wants on incoming and outgoing numbers. Hope it helps you or someone else
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