Android(安卓)网络状态操作

  /**     * 声明连接管理器对象     */    private ConnectivityManager connectivityManager;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);       //1.通过系统服务得到连接管理器对象        this.connectivityManager= (ConnectivityManager) this.getSystemService(Context.CONNECTIVITY_SERVICE);       //2.通过连接管理器对象得到网络信息对象        NetworkInfo networkInfo=this.connectivityManager.getActiveNetworkInfo();       if(networkInfo==null) {           Toast.makeText(this, "当前手机没有联网!", Toast.LENGTH_SHORT).show();       }else{           String typeName=networkInfo.getTypeName();           System.out.println("typeName="+typeName);           Toast.makeText(this, "typeName="+typeName, Toast.LENGTH_SHORT).show();       }    }

    /**     * 声明连接管理器对象     */    private ConnectivityManager connectivityManager;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);       //1.通过系统服务得到连接管理器对象        this.connectivityManager= (ConnectivityManager) this.getSystemService(Context.CONNECTIVITY_SERVICE);       //2.通过连接管理器对象得到网络信息对象        NetworkInfo networkInfo=this.connectivityManager.getActiveNetworkInfo();        if(networkInfo.isAvailable()) {            Toast.makeText(this, "有网络!", Toast.LENGTH_SHORT).show();            //得到网络类型           int type= networkInfo.getType();            switch (type){                //移动网络                case ConnectivityManager.TYPE_MOBILE:                    System.out.println("移动网络");                    break;                //WIFI网络                case ConnectivityManager.TYPE_WIFI:                    System.out.println("WIFI网络");                    break;            }        }else {            Toast.makeText(this, "没有网络", Toast.LENGTH_SHORT).show();        }    }

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