WebView 添加gif 加载效果

package com.careland.bank;

import android.app.Activity;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.webkit.WebView;
import android.webkit.WebViewClient;

public class AnroidBankActivity extends Activity {
    /** Called when the activity is first created. */
	
	private WebView web;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        web=(WebView) this.findViewById(R.id.web);
        web.loadUrl("http://www.baidu.com");
        web.setWebViewClient(new WebViewClient(){

			@Override
			public boolean shouldOverrideUrlLoading(WebView view, String url) {
				// TODO Auto-generated method stub
				view.loadUrl(url);
				return true;
			}

			@Override
			public void onPageStarted(WebView view, String url, Bitmap favicon) {
				// TODO Auto-generated method stub
				super.onPageStarted(view, url, favicon);
				((CLDWebView)view).showloding();
			}

			@Override
			public void onPageFinished(WebView view, String url) {
				// TODO Auto-generated method stub
				super.onPageFinished(view, url);
				((CLDWebView)view).hideloding();
				
			}
        	
        });
        
    }
}

 

package com.careland.bank;

import android.content.Context;
import android.util.AttributeSet;
import android.view.View;
import android.webkit.WebView;

import com.ant.liao.GifView;
import com.ant.liao.GifView.GifImageType;

public class CLDWebView extends WebView {

	private GifView gif;
	public CLDWebView(Context context, AttributeSet attrs) {
		super(context, attrs);
	
	}

	public CLDWebView(Context context) {
		super(context);
		// TODO Auto-generated constructor stub
	}

	public CLDWebView(Context context, AttributeSet attrs, int defStyle) {
		super(context, attrs, defStyle);
		
	}
	@Override
	protected void onMeasure(int w, int h)
	{
		super.onMeasure(w, h);
//		if(gif!=null)
//		{
//			gif.setShowDimension(128, 128);
//		}
	}
	//初始化gif 加入webview
	@Override
    protected void onAttachedToWindow()
	{
		super.onAttachedToWindow();
		if(gif==null)
		{
			gif=new GifView(this.getContext());
			gif.setGifImageType(GifImageType.COVER);
			gif.setShowDimension(128, 128);
			gif.setGifImage(R.drawable.a);
			this.addView(gif);
			
		}
		
	}
	//始终居中显示loading.gif
	@Override 
	protected void onSizeChanged(int w, int h, int ow, int oh)
	{
		super.onSizeChanged(w, h, ow, oh);
		if(gif!=null)
		{
			this.gif.setLayoutParams(new LayoutParams(128,128,(w-128)/2,(h-128)/2));
		}
	}
	public void showloding(){
		if(gif!=null)
		{
			
			gif.setVisibility(View.VISIBLE);
			gif.showAnimation();//显示动画
		}
			
	}
	public void hideloding(){
		if(gif!=null)
		{
			gif.setVisibility(View.INVISIBLE);
			gif.showCover();//gif 显示第一帧 降低内存
		}
	}
	
	
	

}

 

<?xml version="1.0" encoding="utf-8"?>
<AbsoluteLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical">
    
	<!-- 
	<WebView android:id="@+id/web" android:layout_width="fill_parent" android:layout_height="fill_parent"/>
	 -->
    <com.careland.bank.CLDWebView android:id="@+id/web" android:layout_width="fill_parent" android:layout_height="fill_parent"></com.careland.bank.CLDWebView>
</AbsoluteLayout>

 

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.careland.bank"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk android:minSdkVersion="8" />

    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name" >
        <activity
            android:label="@string/app_name"
            android:name=".AnroidBankActivity" >
            <intent-filter >
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>
	<permission android:name="android.permission.INTERNET"></permission>
</manifest>