判断网络状态进行网络加载等操作

@Overrideprotected void onResume() {Log.i("lzan13", "onResume");checkNetworkState();super.onResume();}

/*** 检测网络是否连接* @return*/private boolean checkNetworkState() {boolean flag = false;//得到网络连接信息manager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);//去进行判断网络是否连接if (manager.getActiveNetworkInfo() != null) {flag = manager.getActiveNetworkInfo().isAvailable();}if (!flag) {setNetwork();} else {isNetworkAvailable();}return flag;}/*** 网络未连接时，调用设置方法*/private void setNetwork(){Toast.makeText(this, "wifi is closed!", Toast.LENGTH_SHORT).show();AlertDialog.Builder builder = new AlertDialog.Builder(this);builder.setIcon(R.drawable.ic_launcher);builder.setTitle("网络提示信息");builder.setMessage("网络不可用，如果继续，请先设置网络！");builder.setPositiveButton("设置", new OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {Intent intent = null;/*** 判断手机系统的版本！如果API大于10 就是3.0+* 因为3.0以上的版本的设置和3.0以下的设置不一样，调用的方法不同*/if (android.os.Build.VERSION.SDK_INT > 10) {intent = new Intent(android.provider.Settings.ACTION_WIFI_SETTINGS);} else {intent = new Intent();ComponentName component = new ComponentName("com.android.settings","com.android.settings.WirelessSettings");intent.setComponent(component);intent.setAction("android.intent.action.VIEW");}startActivity(intent);}});builder.setNegativeButton("取消", new OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {}});builder.create();builder.show();}/*** 网络已经连接，然后去判断是wifi连接还是GPRS连接* 设置一些自己的逻辑调用*/private void isNetworkAvailable(){State gprs = manager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE).getState();State wifi = manager.getNetworkInfo(ConnectivityManager.TYPE_WIFI).getState();if(gprs == State.CONNECTED || gprs == State.CONNECTING){Toast.makeText(this, "wifi is open! gprs", Toast.LENGTH_SHORT).show();}//判断为wifi状态下才加载广告，如果是GPRS手机网络则不加载！if(wifi == State.CONNECTED || wifi == State.CONNECTING){Toast.makeText(this, "wifi is open! wifi", Toast.LENGTH_SHORT).show();loadAdmob();}}/*** 在wifi状态下 加载admob广告*/private void loadAdmob(){ll = (LinearLayout) findViewById(R.id.load_ads);ll.removeAllViews();adsView = new AdView(this, AdSize.BANNER, "a15194a1ac9505d");ll.addView(adsView);adsView.loadAd(new AdRequest());}