我们常常在开发的时候,通过获取系统已启动的服务来判断该服务器是否还需要再启动。
而本文将介绍android设备中已启动的服务,并判断某一服务是启动
1.根据ACTIVITY_SERVICE获取系统服务
activityManager = (ActivityManager) getSystemService(ACTIVITY_SERVICE);
2.获取系统中正在运行的服务
runningList = activityManager.getRunningServices(30);//代表我们希望返回的服务数目大小 30
效果图：
实例代码如下
1) activity_main.xml
<span style="font-size:18px;"><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" android:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" > <Button android:id="@+id/service_btn" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="@string/get_all_service" /> <TextView android:id="@+id/display_service_tv" android:layout_width="fill_parent" android:layout_height="fill_parent" android:layout_marginTop="20dp" android:text="@string/display_all_service" android:textColor="#FF0000" /></LinearLayout></span>2).strings.xml
<span style="font-size:18px;"><?xml version="1.0" encoding="utf-8"?><resources> <string name="app_name">AndroidServiceDemo</string> <string name="display_all_service">显示所有服务:</string> <string name="action_settings">Settings</string> <string name="get_all_service">获取所有服务</string></resources></span>3)MainActivity.java
<span style="font-size:18px;">package com.example.androidservicedemo;import java.util.List;import android.app.Activity;import android.app.ActivityManager;import android.os.Bundle;import android.view.Menu;import android.view.MenuItem;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.TextView;public class MainActivity extends Activity { private TextView displayAllServiceTv; private Button getAllServiceBtn; private ActivityManager activityManager; private List<ActivityManager.RunningServiceInfo> runningList; private String myServiceClassName = "org.linphone.LinphoneService"; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); final String defaultStr = this.getResources().getString(R.string.display_all_service); displayAllServiceTv = (TextView) this.findViewById(R.id.display_service_tv); getAllServiceBtn = (Button) this.findViewById(R.id.service_btn); getAllServiceBtn.setOnClickListener(new OnClickListener(){ @Override public void onClick(View arg0) { // TODO Auto-generated method stub StringBuffer displaySb = new StringBuffer(); displaySb.append(defaultStr).append("\n"); activityManager = (ActivityManager) getSystemService(ACTIVITY_SERVICE); runningList = activityManager.getRunningServices(30);//代表我们希望返回的服务数目大小 30 displaySb.append(myServiceClassName).append(":").append(myServiceIsStart(runningList,myServiceClassName)).append("\n"); displayAllServiceTv.setText(getAllService(runningList,displaySb).toString()); } }); } private boolean myServiceIsStart(List<ActivityManager.RunningServiceInfo> runningList,String myServiceClassName){ boolean isStart = false; for(ActivityManager.RunningServiceInfo runningService:runningList){ if(myServiceClassName.equals(runningService.service.getClassName())){ isStart = true; break; } } return isStart; } private StringBuffer getAllService(List<ActivityManager.RunningServiceInfo> runningList,StringBuffer displaySb){ for(ActivityManager.RunningServiceInfo runningService:runningList){ displaySb.append(runningService.service.getClassName()).append("\n"); } return displaySb; } @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); }}</span>