如何从WakefulBroadcastReceiver启动IntentService



我有一个应用程序,您应该能够用我在这个问题中发布的代码完全轻松地重新创建它。这是清单文件:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.broadcasttest"
    android:versionCode="1"
    android:versionName="1.0" >
    <uses-sdk
        android:minSdkVersion="19"
        android:targetSdkVersion="21" />
    <uses-permission android:name="android.permission.WAKE_LOCK"/>
    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.example.broadcasttest.MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <receiver
            android:name="com.example.broadcasttest.TestReceiver"
            android:label="@string/app_name"
            android:enabled="true" >
        </receiver>
        <intentservice 
            android:name="com.example.broadcasttest.MonitorService"
            android:enabled="true" >
            <intent-filter>
                <action android:name="com.example.broadcasttest.MonitorService" />
            </intent-filter>
        </intentservice>
    </application>
</manifest>

正如您所看到的,包含一个活动、一个(唤醒)广播接收器和一个意图服务,所有这些都在同一个包中。活动在发布时开始,代码如下:

package com.example.broadcasttest;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;

public class MainActivity extends Activity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        sendBroadcast(new Intent(this, TestReceiver.class));
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }
    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();
        if (id == R.id.action_settings) {
            return true;
        }
        return super.onOptionsItemSelected(item);
    }
}

这成功地触发了TestReceiveronReceive功能。

package com.example.broadcasttest;
import android.content.Context;
import android.content.Intent;
import android.support.v4.content.WakefulBroadcastReceiver;
public class TestReceiver extends WakefulBroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        //Intent service = new Intent("com.example.broadcasttest.MonitorService");
        Intent service = new Intent(context, MonitorService.class);
        startWakefulService(context, service);
    }
}

不过,这就是问题所在,我在onReceive函数中放置了一个断点,它肯定会被调用。但是,MonitorService类永远无法访问。我在onHandleEvent函数中放置了一个断点,但它似乎从来没有这么远。这是这个类的代码:

package com.example.broadcasttest;
import android.app.IntentService;
import android.content.Intent;
public class MonitorService extends IntentService {
    public MonitorService(String name) {
        super(name);
    }
    public MonitorService()
    {
        super("MonitorService");
    }
    @Override
    protected void onHandleIntent(Intent intent) {
        try {
            Thread.sleep(1000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        } finally {
            TestReceiver.completeWakefulIntent(intent);
        }
    }
}

TestReceiver类中的注释行可以看出,我尝试使用隐式意图而不是显式意图。我也读过这个问题,并尝试了其中提到的所有内容。我是不是遗漏了什么?我正在一个模拟器(Nexus7 API L)上运行这个。

这里有我遗漏的东西吗?

应用程序清单中没有标记为<intentservice>IntentServiceService的一个子类,因此需要在清单中将其声明为服务。


更改

<intentservice 
    android:name="com.example.broadcasttest.MonitorService"
    android:enabled="true" >
        <intent-filter>
            <action android:name="com.example.broadcasttest.MonitorService" />
        </intent-filter>
</intentservice>

<service 
    android:name="com.example.broadcasttest.MonitorService"
    android:enabled="true" >
       <intent-filter>
           <action android:name="com.example.broadcasttest.MonitorService" />
       </intent-filter>
</service>

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