Android如何获取网络连接状态(3G/Wifi)及怎样调用网络配置界面
- 配置AndroidManifest.xml中的权限
添加:
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
注:这是Android的安全机制. - 调用到ConnectivityManager 类
public void testConnectivityManager() { ConnectivityManager connManager = (ConnectivityManager) this .getSystemService(CONNECTIVITY_SERVICE); // 获取代表联网状态的NetWorkInfo对象 NetworkInfo networkInfo = connManager.getActiveNetworkInfo(); // 获取当前的网络连接是否可用 if (null == networkInfo) { Toast.makeText(this, "当前的网络连接不可用", Toast.LENGTH_SHORT).show(); //当网络不可用时,跳转到网络设置页面 startActivityForResult(new Intent( android.provider.Settings.ACTION_WIRELESS_SETTINGS), 1); } else { boolean available = networkInfo.isAvailable(); if (available) { Log.i("通知", "当前的网络连接可用"); Toast.makeText(this, "当前的网络连接可用", Toast.LENGTH_SHORT).show(); } else { Log.i("通知", "当前的网络连接不可用"); Toast.makeText(this, "当前的网络连接不可用", Toast.LENGTH_SHORT).show(); } } State state = connManager.getNetworkInfo( ConnectivityManager.TYPE_MOBILE).getState(); if (State.CONNECTED == state) { Log.i("通知", "GPRS网络已连接"); Toast.makeText(this, "GPRS网络已连接", Toast.LENGTH_SHORT).show(); } state = connManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI) .getState(); if (State.CONNECTED == state) { Log.i("通知", "WIFI网络已连接"); Toast.makeText(this, "WIFI网络已连接", Toast.LENGTH_SHORT).show(); } //// 跳转到无线网络设置界面 // startActivity(new // Intent(android.provider.Settings.ACTION_WIRELESS_SETTINGS)); //// 跳转到无限wifi网络设置界面 // startActivity(new // Intent(android.provider.Settings.ACTION_WIFI_SETTINGS)); }
也可以:
private void testConnectivityManager() { ConnectivityManager conMan = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE); //mobile 3G Network State mobile = conMan.getNetworkInfo(ConnectivityManager.TYPE_MOBILE).getState(); Log.d(mobile.toString()); //wifi Network State wifi = conMan.getNetworkInfo(ConnectivityManager.TYPE_WIFI).getState(); Log.d(wifi.toString()); //如果3G网络和wifi网络都未连接,且不是处于正在连接状态 则进入Network Setting界面 由用户配置网络连接 if(mobile==State.CONNECTED||mobile==State.CONNECTING) return; if(wifi==State.CONNECTED||wifi==State.CONNECTING) return; startActivity(new Intent(Settings.ACTION_WIRELESS_SETTINGS));//进入无线网络配置界面 //startActivity(new Intent(Settings.ACTION_WIFI_SETTINGS)); //进入手机中的wifi网络设置界面 }
转 : http://www.cnblogs.com/rockdean/articles/2259806.html