WebView的基本使用

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放大缩小按钮, 页面标题, 进度条儿;

布局文件
activityMain.xml

<LinearLayout 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:orientation="vertical" >

    
    <TextView 
        android:id="@+id/text"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        
        />
    <ProgressBar 
        android:id="@+id/progress"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        style="?android:attr/progressBarStyleHorizontal"
        />
    
    <WebView 
        android:id="@+id/webview"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        />
    
    
</LinearLayout>

================
MainActivity.java





package com.example.webview_demo;

import android.app.Activity;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.view.View;
import android.webkit.WebChromeClient;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.ProgressBar;
import android.widget.TextView;

public class MainActivity extends Activity {

   
   private WebView webView;
   private TextView textView;
   private ProgressBar progressBar;
   
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        //获取控件ID
        webView = (WebView) findViewById(R.id.webview);
        textView = (TextView) findViewById(R.id.text);
        progressBar = (ProgressBar) findViewById(R.id.progress);
        //加载本地的网页   本地的路径
        webView.loadUrl("file:///android_asset/phone.html");
        //网络
//        webView.loadUrl("http://172.16.10.119:8080/bwie/mhIndex.do?m=index#");
        //支持方法放大缩小
        webView.getSettings().setBuiltInZoomControls(true);
        //得到网页的内容
        webView.setWebChromeClient(new WebChromeClient(){
              //得到标题
              @Override
              public void onReceivedTitle(WebView view, String title) {
                 super.onReceivedTitle(view, title);
                 //title 标题
                 textView.setText(title);
                 
              }
              
              //进度条
              @Override
              public void onProgressChanged(WebView view, int newProgress) {
              super.onProgressChanged(view, newProgress);
              
              //newProgress进度
                 progressBar.setProgress(newProgress);
              
              }
        });
        
        
        //得到网页的状态
        webView.setWebViewClient(new WebViewClient(){
              //加载完成
              @Override
              public void onPageFinished(WebView view, String url) {
                 super.onPageFinished(view, url);
                 //隐藏
                 progressBar.setVisibility(View.INVISIBLE);
                 
              }
              
              //正在加载
              @Override
              public void onPageStarted(WebView view, String url, Bitmap favicon) {
              super.onPageStarted(view, url, favicon);
              
                 progressBar.setVisibility(View.VISIBLE);
              
              }
           
              //点击超链接回掉的方法
              @Override
              public boolean shouldOverrideUrlLoading(WebView view, String url) {
              return super.shouldOverrideUrlLoading(view, url);
              }

           
           
        });
        
    }
}