获取网络状态 主类

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.widget.Toast;


public class MainActivity extends AppCompatActivity {


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        int netType = NetStateUtil.getNetType(MainActivity.this);
        if (netType != -1) {
            initdata();
        }else {
            Toast.makeText(this, "请检查网络", Toast.LENGTH_SHORT).show();
        }
        


    }


    private void initdata() {
        Toast.makeText(this, "我有网络哈哈哈哈", Toast.LENGTH_SHORT).show();
    }
}