Android 判断当前联网的类型 wifi、移动数据流量

xinhu1300

　　先获取系统管理网络连接的Manager：
　　ConnectivityManager connectivityManager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
　　再获取当前已经激活的连接：（当期为null时代表当前无连接）
　　NetworkInfo activeNetworkInfo = connectivityManager.getActiveNetworkInfo();
　　其中常量ConnectivityManager.TYPE_MOBILE标识着是移动数据流量，
　　而ConnectivityManager.TYPE_WIFI标志着是wifi。



package com.example.NetworkChangeReceiver2;
import android.app.Activity;
import android.content.Context;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.os.Bundle;
import android.view.View;
import android.widget.Toast;
public class MyActivity extends Activity {
ConnectivityManager connectivityManager;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
connectivityManager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
}
public void isWifi(View view) {
NetworkInfo activeNetworkInfo = connectivityManager.getActiveNetworkInfo();
if (activeNetworkInfo == null) {
Toast.makeText(this, "没有联网！", 1).show();
return;
}
if(activeNetworkInfo.getType() == ConnectivityManager.TYPE_WIFI) {
Toast.makeText(this, "连接的网络是wifi！", 1).show();
} else {
Toast.makeText(this, "不是wifi！", 1).show();
}
}
public void isMobile(View view) {
NetworkInfo activeNetworkInfo = connectivityManager.getActiveNetworkInfo();
if (activeNetworkInfo == null) {
Toast.makeText(this, "没有联网！", 1).show();
return;
}
if(activeNetworkInfo.getType() == ConnectivityManager.TYPE_MOBILE) {
Toast.makeText(this, "连接的网络是移动数据流量！", 1).show();
} else {
Toast.makeText(this, "不是移动数据流量！", 1).show();
}
}
}