Java android：后台手机状态监控

我正在尝试创建一个后台进程来监视手机的状态，并在状态发生变化时显示toast消息。到目前为止，我已经实现了这些，但是当我安装并运行时。它什么也不做。它不会显示任何东西。我在这里张贴我的代码。请帮帮我

StateMonitor.java

`

PhoneReceiver.java

`import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.telephony.PhoneStateListener;
import android.telephony.TelephonyManager;
//Automatically called when State Change is Detected because this Receiver is Registered for PHONE_STATE intent filter in AndroidManifest.xml
public class PhoneStateReceiver extends BroadcastReceiver {

    TelephonyManager manager;       
    PhoneStateMonitor phoneStateListener;
    static boolean isAlreadyListening=false;

    //This Method automatically Executed when Phone State Change is Detected
    public void onReceive(Context context, Intent intent) {
        // TODO Auto-generated method stub
        phoneStateListener =new PhoneStateMonitor(context);//Creating the Object of Listener
        manager=(TelephonyManager)context.getSystemService(Context.TELEPHONY_SERVICE);//Getting the Telephony Service Object
        if(!isAlreadyListening)//Checking Listener is Not Registered with Telephony Services
        {
              manager.listen(phoneStateListener, PhoneStateListener.LISTEN_CALL_STATE);//Registering the Listener with Telephony to listen the State Change
          isAlreadyListening=true;  //setting true to indicate that Listener is listening the Phone State
        }

    }

}
`

Android Manifest.xml

`<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.pavan.phonecall"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="10"
        android:targetSdkVersion="21" />

<uses-permission android:name="android.permission.READ_PHONE_STATE" /><!-- Permission for Reading Phone State -->
    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name" >

        <!--  If this app is not running then this will be automatically called when phone state change detected(Look at Intent Filter) -->
        <receiver android:name=".PhoneStateReceiver">
            <intent-filter>
                <action android:name="android.intent.action.PHONE_STATE"/>
            </intent-filter>
            </receiver>
    </application>

</manifest>`

`
`

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当我从eclipse安装时，它显示apk已安装。当我打电话时，祝酒词不会弹出。我哪里做错了？请帮忙！谢谢

安装应用程序时，它将保持在

停止

状态，直到您使用某些UI控件（即

活动

）启动应用程序。从年起，它成为强制性的

因此，最终，您需要在应用程序中至少有一个

活动

，而不仅仅是

广播接收器

，才能将应用程序移出该

停止

状态。否则它将不会接收任何广播

参考资料：

---

那么，如何为相同的应用程序编写后台服务？在我安装之后，它应该只是监视。隐藏的活动或窗口可能是？您可以为此使用相同的代码，但您需要的是至少一个可以启动应用程序的

活动

。那么如何隐藏我的活动？@PavanKumar:您可以尝试为应用程序创建

小部件

，并尝试使用它将应用程序移出停止状态。

`<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.pavan.phonecall"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="10"
        android:targetSdkVersion="21" />

<uses-permission android:name="android.permission.READ_PHONE_STATE" /><!-- Permission for Reading Phone State -->
    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name" >

        <!--  If this app is not running then this will be automatically called when phone state change detected(Look at Intent Filter) -->
        <receiver android:name=".PhoneStateReceiver">
            <intent-filter>
                <action android:name="android.intent.action.PHONE_STATE"/>
            </intent-filter>
            </receiver>
    </application>

</manifest>`