android 獲取設備中已啟動的服務並判斷某一服務是否啟動

我們常常在開發的時候,通過獲取系統已啟動的服務來判斷該服務器是否還需要再啟動。

而本文將介紹android設備中已啟動的服務,並判斷某一服務是啟動

1.根據ACTIVITY_SERVICE獲取系統服務

activityManager = (ActivityManager) getSystemService(ACTIVITY_SERVICE);

2.獲取系統中正在運行的服務

runningList = activityManager.getRunningServices(30);//代表我們希望返回的服務數目大小 30

效果圖：

實例代碼如下<喎?/kf/ware/vc/" target="_blank" class="keylink">vcD4KPHA+MSkgYWN0aXZpdHlfbWFpbi54bWw8L3A+CjxwPjwvcD4KPHByZSBjbGFzcz0="brush:java;"> 2).strings.xml

    AndroidServiceDemo
    顯示所有服務:
    Settings
    獲取所有服務

3)MainActivity.java

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 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);//代表我們希望返回的服務數目大小 30
				
				displaySb.append(myServiceClassName).append(":").append(myServiceIsStart(runningList,myServiceClassName)).append("\n");
				
				displayAllServiceTv.setText(getAllService(runningList,displaySb).toString());
				
			}
			
		});
	}
	
	private boolean myServiceIsStart(List 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 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);
	}

}