java – 在android中创建全局函数

像这样创建类并在此处添加您的函数：

package com.myTest;

import android.content.Context;
import android.net.Connectivitymanager;
import android.net.NetworkInfo;

public class MyGlobals{
    Context mContext;

    // constructor
    public MyGlobals(Context context){
        this.mContext = context;
    }

    public String getUserName(){
        return "test";
    }

    public Boolean isNetworkConnected() {
          Connectivitymanager cm = (Connectivitymanager) mContext.getSystemservice(Context.CONNECTIVITY_serviCE);
          NetworkInfo ni = cm.getActiveNetworkInfo();
          if (ni == null) {
           // There are no active networks.
           return false;
          } else
           return true;
    }
}

然后在您的活动中声明实例：

@H_27_6@myGlobals myGlog;

然后初始化并使用该全局类中的方法：

@H_27_6@myGlog = new MyGlobals(getApplicationContext()); String username = myGlog.getUserName(); Boolean inConnected = myGlog.isNetworkConnected();

您的清单文件中所需的权限：

<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

谢谢.