Android--双重定时器实现

在开发中，遇到服务是24小时定时执行，需要在WiFi条件下上传，需要监听WiFi，在开定时器，持续刷新WiFi状态

WiFi监听：

import android.content.Context; import android.net.ConnectivityManager; import android.net.NetworkInfo; public class iswifi { public static boolean isWiFiActive(Context inContext) { Context context = inContext.getApplicationContext(); ConnectivityManager connectivity = (ConnectivityManager) context .getSystemService(Context.CONNECTIVITY_SERVICE); if (connectivity != null) { NetworkInfo[] info = connectivity.getAllNetworkInfo(); if (info != null) { for (int i = 0; i < info.length; i++) { if (info[i].getTypeName().equals("WIFI") && info[i].isConnected()) { return true; } } } } return false; } } 

import android.os.Bundle; import android.os.Handler; import android.support.v7.app.AppCompatActivity; public class MainActivity extends AppCompatActivity { private Runnable runnable; private Handler handler; private Runnable runnable1; private Handler handler1; private int flag = 0; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); //外部定时器 handler1 = new Handler(); runnable1 = new Runnable() { @Override public void run() { init(); handler1.postDelayed(this,1000*60*60); } }; handler1.postDelayed(runnable1,1000*5); } private void init() { //内部检查WiFi定时器 handler = new Handler(); runnable = new Runnable() { @Override public void run() { if (iswifi.isWiFiActive(MyApplication.getContext())){ System.out.println("456"); handler.removeCallbacks(runnable); }else { System.out.println("789"); handler.postDelayed(this,1000*5); } } }; handler.postDelayed(runnable,1000); //利用while实现，不用定时器 // flag = 0; // while (flag == 0 || flag == 2){ // if (iswifi.isWiFiActive(MyApplication.getContext())){ // System.out.println("456"); // flag = 1; // }else { // System.out.println("789"); // flag = 2; // } // } } }