经验来自学习之应用网络处理
开发移动软件处理网络连接对于程序员是一个头疼的问题，至少我这个菜鸟这么认为，翻了几个软件发现有几个软件在logo页面就是检测网络是否可用，在其他页面有一个broadcast去处理，写了一下子，贴点代码做个笔记
@Override
protected void onResume() {
// TODO Auto-generated method stub
super.onResume();
if (checknetwork()) {
//跳转到其他页面的代码
.......................
}else {
openNet("网络信息", "无法连接上服务器，请检查网络");
}
}
private void openNet(String title, String message) {
// 让用户检查网络
AlertDialog.Builder adb = new AlertDialog.Builder(
LogoActivity.this);
final AlertDialog ad = adb.create();
// String current = "当前无法获取定位信息";
ad.setTitle(title);
ad.setMessage(message);
ad.setButton("确定", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
//由于4.0以上把原来的设置方式舍弃了所以上面的代码舍去
if(android.os.Build.VERSION.SDK_INT > 13 ){
//3.2以上打开设置界面，也可以直接用ACTION_WIRELESS_SETTINGS打开到wifi界面
startActivity(new Intent(android.provider.Settings.ACTION_SETTINGS));}
else {
startActivity(new Intent(android.provider.Settings.ACTION_WIRELESS_SETTINGS));
}
ad.dismiss();
}
});
ad.setButton2("取消", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
ad.dismiss();
System.exit(0);
}
});
ad.show();
}
public boolean checknetwork() {
ConnectivityManager cm = (ConnectivityManager)getSystemService(Context.CONNECTIVITY_SERVICE);
if( cm == null )
return false;
NetworkInfo netinfo = cm.getActiveNetworkInfo();
if (netinfo == null )
{
return false;
}
if(netinfo.isConnected())
{
return true;
}
return false;
}
网络连接广播处理
Log.e(TAG,
ConnectivityManager connManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
State state = connManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI).getState();
success = }
state = connManager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE).getState();
success = }
Toast.makeText(context, context.getString(R.string.your_network_has_disconnected), Toast.LENGTH_LONG).show();
}
}
public class ConnectionChangeReceiver extends BroadcastReceiver { private static final String TAG =ConnectionChangeReceiver.class.getSimpleName(); @Override public void onReceive(Context context, Intent intent) { Log.e(TAG, "网络状态改变"); boolean success = false; //获得网络连接服务 ConnectivityManager connManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE); // State state = connManager.getActiveNetworkInfo().getState(); // 获取WIFI网络连接状态 State state = connManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI).getState(); // 判断是否正在使用WIFI网络 if (State.CONNECTED == state) { success = true; } // 获取GPRS网络连接状态 state = connManager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE).getState(); // 判断是否正在使用GPRS网络 if (State.CONNECTED == state) { success = true; } if (!success) { Toast.makeText(context, context.getString(R.string.your_network_has_disconnected), Toast.LENGTH_LONG).show(); } }< !-- Needed to check when the network connection changes -->
< uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
< receiver android:name="you_package_name.ConnectionChangeReceiver" android:label="NetworkConnection">
< intent-filter>
< action android:name="android.net.conn.CONNECTIVITY_CHANGE"/>
< /intent-filter>
< /receiver>
使用方式一：
1. 在Activity的onCreate中:
//注册网络监听
IntentFilter filter = new IntentFilter();
filter.addAction(ConnectivityManager.CONNECTIVITY_ACTION);
registerReceiver(mNetworkStateReceiver, filter);
2. 在Activity中的onDestroy中:
//取消监听
unregisterReceiver(mNetworkStateReceiver);
使用方式二：
1. 应用启动时，启动Service，在Service的onCreate方法中注册网络监听：
//注册网络监听
IntentFilter filter = new IntentFilter();
filter.addAction(ConnectivityManager.CONNECTIVITY_ACTION);
registerReceiver(mNetworkStateReceiver, filter);
2. 应用退出时，Service关闭，在Service的onDestroy方法中取消监听：
//取消监听
unregisterReceiver(mNetworkStateReceiver);