android 判断是否联网

遇到一个需求，想看看设备是否联网，但又没有浏览器，写个程序测一下

1.builder

   implementation 'com.github.bumptech.glide:glide:4.8.0'

2.网络权限

 <!-- 获取网络状态 -->
    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

    <uses-permission android:name="android.permission.INTERNET" />

3.主界面

package com.example.iosdialogdemo;

import android.content.Context;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.os.Bundle;
import android.util.Log;
import android.widget.ImageView;

import androidx.annotation.Nullable;
import androidx.appcompat.app.AppCompatActivity;

import com.bumptech.glide.Glide;

public class TestActivity extends AppCompatActivity {

    private boolean isConnect = false;
    private boolean isConnect2 = false;
    private ImageView iv_ph;
    private String url = "https://fuss10.elemecdn.com/e/5d/4a731a90594a4af544c0c25941171jpeg.jpeg";

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_test);
        isNetPingUsable();
        isNetworkAvailable(TestActivity.this);

        iv_ph = findViewById(R.id.iv_ph);

        Glide.with(getApplicationContext()).load(url).into(iv_ph);
    }

    public boolean isNetPingUsable() {
        Runtime runtime = Runtime.getRuntime();
        try {
            Process process = runtime.exec("ping -c 3 www.baidu.com");
            int ret = process.waitFor();
            if (ret == 0) {
                isConnect = true;
            } else {
                isConnect = false;
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return isConnect;
    }


    public boolean isNetworkAvailable(Context context) {
        ConnectivityManager connectivity = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
        if (connectivity != null) {
            NetworkInfo info = connectivity.getActiveNetworkInfo();
            if (info != null && info.isConnected()) {       // 当前网络是连接的
                isConnect2 = info.getState() == NetworkInfo.State.CONNECTED;      // 当前所连接的网络可用
                Log.e("TAG", "" + isConnect2);
            }
        }
        return isConnect2;
    }


}