Android 服务Servicer查询

本文介绍两种查询Android中Service状态的方法:一是通过指定Service类名检查其是否正在运行;二是列出当前所有正在运行的服务及其类名。

简单的贴上俩个Service查询:


一、通过服务service的class名字查询,是否开启

	//通过Service的类名来判断是否启动某个服务 
	private boolean MusicServiceIsStart(List<ActivityManager.RunningServiceInfo> mServiceList,String className){ 
	for(int i = 0; i < mServiceList.size(); i ++)
	{ 
	if(className.equals(mServiceList.get(i).service.getClassName()))
	{ 
	return true; 
	}
	}
	return false;
	}


二、查询当前所有开启的服务名字

	//获取所有启动的服务的类名 
	private String getServiceClassName(List<ActivityManager.RunningServiceInfo> mServiceList){ 
	String res = "";
	for(int i = 0; i < mServiceList.size(); i ++){
	res+=mServiceList.get(i).service.getClassName()+ " \n"; 
	} 
	return res;
	}


调用方式:

		ActivityManager mActivityManager = (ActivityManager)getSystemService(ACTIVITY_SERVICE); 
		List<ActivityManager.RunningServiceInfo> mServiceList = mActivityManager.getRunningServices(30);


/* 文件路径: kucun2/ExampleInstrumentedTest.java */ package com.example.kucun2; import android.content.Context; import androidx.test.platform.app.InstrumentationRegistry; import androidx.test.ext.junit.runners.AndroidJUnit4; import org.junit.Test; import org.junit.runner.RunWith; import static org.junit.Assert.*; /** * Instrumented test, which will execute on an Android device. * * @see <a href="http://d.android.com/tools/testing">Testing documentation</a> */ @RunWith(AndroidJUnit4.class) public class ExampleInstrumentedTest { @Test public void useAppContext() { // Context of the app under test. Context appContext = InstrumentationRegistry.getInstrumentation().getTargetContext(); assertEquals("com.example.kucun2", appContext.getPackageName()); } } Process: com.example.kucun2, PID: 21576 java.lang.NullPointerException: Attempt to invoke interface method 'java.util.Iterator java.util.List.iterator()' on a null object reference at com.example.kucun2.Servicer.InventoryService.getProductsForOrder(InventoryService.java:314) at com.example.kucun2.ui.jinhuo.AddInventoryFragment.updateChanpinSpinner(AddInventoryFragment.java:230) at com.example.kucun2.ui.jinhuo.AddInventoryFragment.lambda$setupListeners$0(AddInventoryFragment.java:126) at com.example.kucun2.ui.jinhuo.AddInventoryFragment.$r8$lambda$-5tg-g7tQFDiy_FrI04tqBjW2Ds(Unknown Source:0) at com.example.kucun2.ui.jinhuo.AddInventoryFragment$$ExternalSyntheticLambda4.onItemClick(D8$$SyntheticClass:0) at android.widget.AutoCompleteTextView.performCompletion(AutoCompleteTextView.java:1086) at android.widget.AutoCompleteTextView.-$$Nest$mperformCompletion(Unknown Source:0) at android.widget.AutoCompleteTextView$DropDownItemClickListener.onItemClick(AutoCompleteTextView.java:1466) at android.widget.AdapterView.performItemClick(AdapterView.java:330) at android.widget.AbsListView.performItemClick(AbsListView.java:1489) at android.widget.AbsListView$PerformClick.run(AbsListView.java:3609) at android.widget.AbsListView$3.run(AbsListView.java:4714) at android.os.Handler.handleCallback(Handler.java:1014) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loopOnce(Looper.java:250) at android.os.Looper.loop(Looper.java:340) at android.app.ActivityThread.main(ActivityThread.java:9913) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCall
最新发布
07-02
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