Android判断设备网络连接状态及判断连接方式的方法

 /** * 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() { @Override public 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() { @Override public 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(); } }