- 添加权限
//网络状态
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"></uses-permission>
//网络变更
<uses-permission android:name="android.permission.CHANGE_NETWORK_STATE"></uses-permission>
<uses-permission android:name="android.permission.CHANGE_WIFI_STATE"></uses-permission>
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE"></uses-permission>
- 书写监听广播
public class NetStateReceiver extends BroadcastReceiver {
private NetType netType; //网络类型
private NetChangeListenner listenner;
public NetStateReceiver(){
//初始化网络
netType=NetType.NONE;
}
public void setListenner(NetChangeListenner listenner){
this.listenner=listenner;
}
@Override
public void onReceive(Context context, Intent intent) {
if(intent ==null ||intent.getAction() ==null){
return;
}
//处理广播事件
if(intent.getAction().equalsIgnoreCase(Constants.ANDROID_NET_CHANGE_ACTION)){
Log.e("net","网络发生改变了");
netType= NetworkUtils.getNetType();
if(NetworkUtils.isNetworkAvailable()){
Log.e("net","网络连接成功");
if(listenner!=null){
listenner.onConnect(netType);
}
}else {
Log.e("net","没有网络连接");
listenner.onDisConnect();
}
}
}
}
- 清单文件配置
<receiver android:name="com.example.library.NetStateReceiver">
<intent-filter>
<action android:name="android.net.conn.CONNECTIVITY_CHANGE" />
</intent-filter>
</receiver>
- 网络变化后的回调
public interface NetChangeListenner {
void onConnect(NetType type);
void onDisConnect();
}
- 网络判断的工具类
package com.example.library.util;
import android.content.Context;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import com.example.library.NetworkManager;
import com.example.library.type.NetType;
/**
* Created by Amn on 2019/4/4.
*/
public class NetworkUtils {
/**
* 判断网络是否可用
* @return
*/
public static boolean isNetworkAvailable (){
ConnectivityManager connectivity = (ConnectivityManager) NetworkManager.getDefault().getApplication()
.getSystemService(Context.CONNECTIVITY_SERVICE);
if (connectivity != null) {
NetworkInfo info = connectivity.getActiveNetworkInfo();
if (info != null && info.isConnected())
{
// 当前网络是连接的
if (info.getState() == NetworkInfo.State.CONNECTED)
{
// 当前所连接的网络可用
return true;
}
}
}
return false;
}
/**
* 获取当前网络类型
* @param
* @return
*/
public static NetType getNetType(){
ConnectivityManager mConnectivityManager = (ConnectivityManager) NetworkManager.getDefault().getApplication().getSystemService(Context.CONNECTIVITY_SERVICE);
if(mConnectivityManager==null) return NetType.NONE;
NetworkInfo mNetworkInfo = mConnectivityManager.getActiveNetworkInfo();
if(mNetworkInfo ==null){
return NetType.NONE;
}
int netType =mNetworkInfo.getType();
if(netType==ConnectivityManager.TYPE_MOBILE){
if(mNetworkInfo.getExtraInfo().toLowerCase().equals("cmnet")){
return NetType.CMNET;
}else {
return NetType.CMWAP;
}
}else if(netType==ConnectivityManager.TYPE_WIFI){
return NetType.WIFI;
}
return NetType.NONE;
}
}
- 网络状态枚举类
/**
* Created by Amn on 2019/4/4.
*/
public enum NetType {
//只要由有网络不关心wifi 还是gprs
AUTO,
//wifi
WIFI,
//手机上网
CMWAP,
//主要是pc笔记本/pad 上网
CMNET,
//没有网络
NONE
}
- 常量类
/**
* Created by Amn on 2019/4/4.
*/
public class Constants {
public static final String ANDROID_NET_CHANGE_ACTION="android.net.conn.CONNECTIVITY_CHANGE";
public static final int SETTING_REQUEST_CODE=8888;
}
- 管理类 方便外部直接调用
package com.example.library;
import android.app.Application;
import android.content.Context;
import android.content.IntentFilter;
import com.example.library.listenner.NetChangeListenner;
import com.example.library.util.Constants;
/**
* Created by Amn on 2019/4/4.
*/
public class NetworkManager {
private static volatile NetworkManager instance;
private Application application;
private NetStateReceiver receiver;
public void setListenner(NetChangeListenner listenner){
receiver.setListenner(listenner);
}
private NetworkManager(){
receiver =new NetStateReceiver();
}
public static NetworkManager getDefault(){
if(instance==null){
synchronized (NetworkManager.class){
if (instance==null){
instance=new NetworkManager();
}
}
}
return instance;
}
public void init (Application application){
if(application ==null) return;
this.application=application;
//动态广播注册
IntentFilter filter=new IntentFilter();
filter.addAction(Constants.ANDROID_NET_CHANGE_ACTION);
application.registerReceiver(receiver,filter);
}
public Application getApplication(){
if(application==null){
throw new RuntimeException("xxxxx init");
}
return application;
}
}
到此网络状态的监听的库就写好了 。使用如下：
package com.example.amn.amnnetwork;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import com.example.library.NetworkManager;
import com.example.library.annotation.Network;
import com.example.library.listenner.NetChangeListenner;
import com.example.library.type.NetType;
public class MainActivity extends AppCompatActivity implements NetChangeListenner {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
NetworkManager.getDefault().init(getApplication());
NetworkManager.getDefault().setListenner(this);
}
@Override
public void onConnect(NetType type) {
Log.e("net",type.name());
}
@Override
public void onDisConnect() {
Log.e("net","没有网络");
}
@Override
protected void onDestroy() {
super.onDestroy();
}
}
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