判断有没有网，列如wafi,移动数据流量

//网络是否连接

//权限

public boolean isNetWorkAvailable(Context context){
    //网络连接管理器
    ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
    //获得网络信息
    NetworkInfo info = connectivityManager.getActiveNetworkInfo();
    if(info!=null){
        return true;
    }
    return false;
}


//是否是wifi
public boolean isWifi(Context context){
    ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
    NetworkInfo info = connectivityManager.getActiveNetworkInfo();
    if(info!=null&&info.getType()==ConnectivityManager.TYPE_WIFI){
        return true;
    }
    return false;
}


//是否是流量
public boolean isGPS(Context context){
    ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
    NetworkInfo info = connectivityManager.getActiveNetworkInfo();
    if(info!=null&&info.getType()==ConnectivityManager.TYPE_MOBILE){
        return true;
    }
    return false;
}

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
       /* boolean available = NetWorkUtils.isNetWorkAvailable(this);
        if (available) {
            Toast.makeText(MainActivity.this, "网络连接成功", Toast.LENGTH_SHORT).show();
        } else {
            Toast.makeText(MainActivity.this, "网络连接失败", Toast.LENGTH_SHORT).show();

        }*/
        /*boolean wifi = NetWorkUtils.isWifi(this);
        if (wifi) {
            Toast.makeText(MainActivity.this, "wifi网络连接成功", Toast.LENGTH_SHORT).show();
        } else {
            Toast.makeText(MainActivity.this, "wifi网络连接失败", Toast.LENGTH_SHORT).show();

        }*/
        boolean mobile = NetWorkUtils.isMobile(this);
        if (mobile) {
            Toast.makeText(MainActivity.this, "手机流量网络连接成功", Toast.LENGTH_SHORT).show();

        } else {
            Toast.makeText(MainActivity.this, "手机流量网络连接失败", Toast.LENGTH_SHORT).show();

        }
    }
}