Android网络技术

WebView使用方法:

1、设置布局,在activity_main.xml中添加<webView>

<LinearLayout......
    <webView
        android:id="@+id/web_view"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
</LinearLayout>

2、修改MainActivity中代码

Pubilc class MainActivity extends AppCompatActivity{
    @Override
    protected void onCreate(Bundle saveInstanceState){
        super.onCreate(saveInstanceState);
        setContentView(R.layout.activity_main);
        WebView webView = (WebView)findViewById(R.id.web_view);
        webView.getSettings().setJavaScriptEnabled(true);  //支持JS
        webView.setWebViewClent(new WebViewClient());  //当前webView中显示网页
        webView.loadUrl("http://www.baidu.com");
    }
}

3、访问网路需要声明权限:<use-permission android:name="android.permission.INTERNET" />

 

HTTP协议:

使用HttpURLConnection

1、获取HttpURLConnection实例

  URL url = new URL("http://www.baidu.com");

  HttpURLConnection connection = (HttpURLConnection) url.openConnection();

2、设置HTTP请求数据方法get/post

  connection:setRequestMethod("GET");  //设置请求方法为GET

3、设置一些消息头

  connection.setConnectTimeout(8000);

  connection.setReadTimeout(8000);

4、获取从服务器返回的输入流

  InputStream in = connection.getInputStream();

5、关闭HTTP  

  connection.disconnect();

 

POST方法向服务器提交数据:(键值对)

  connection.setRequestMethod("POST");

  DataOutputStream out = new DataOutputStream(connection.getOutputStream());

  out.writeBytes("username = admin&password=123456");

posted @ 2017-02-20 21:09  yl007  阅读(130)  评论(0编辑  收藏  举报