Android 显示 WebView ，加载URL 时，向webview的 header 里面传递参数

 

1、主要布局 

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:fitsSystemWindows="true" tools:context=".MainActivity">

    <WebView android:id="@+id/webview" android:layout_width="match_parent" android:layout_height="match_parent">
    </WebView>

</RelativeLayout>

 

2、代码实现

package com.webview.demo;  2 
import android.os.Bundle;  4 import android.support.v7.app.AppCompatActivity;  5 import android.webkit.WebView;  6 
import java.util.HashMap;  8 import java.util.Map;  9 
public class MainActivity extends AppCompatActivity { 11 
    private WebView webView ; 13 
    private String webViewHeaderKey = "tokenId" ; 15     private String webViewHeaderValue = "562142" ; 16 
    private String url = "" ; 18 
 @Override 20     protected void onCreate(Bundle savedInstanceState) { 21         super.onCreate(savedInstanceState); 22  setContentView(R.layout.activity_main); 23 
        webView = (WebView) findViewById( R.id.webview ); 25 

        if ( webViewHeaderValue != "" ){ 28             Map<String, String > map = new HashMap<String, String>() ; 29  map.put( webViewHeaderKey , webViewHeaderValue ) ; 30 
 webView.loadUrl( url , map ) ; 32         }else { 33  webView.loadUrl( url ) ; 34  } 35 
 } 37 }