由于最近项目部分需求要访问网页查阅信息,如:学历查询,学位查询,英语四六级查询等。
在这里总结下完成的方式,难度也不算大。
自定义带进度条的WebView控件:
package app.ui.widget;
import android.content.Context;
import android.util.AttributeSet;
import android.webkit.WebView;
import android.widget.ProgressBar;
/**
* 自定义WebView带进度条
* @author gaochun
*
*/
@SuppressWarnings("deprecation")
public class ProgressWebView extends WebView {
private ProgressBar progressbar; /** 进度条 */
public ProgressWebView(Context context, AttributeSet attrs) {
super(context, attrs);
// 初始化进度条
progressbar = new ProgressBar(context, null, android.R.attr.progressBarStyleHorizontal);
// 设置进度条风格
progressbar.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT, 5, 0, 0));
addView(progressbar);
setWebChromeClient(new WebChromeClient());
}
public class WebChromeClient extends android.webkit.WebChromeClient {
@Override
public void onProgressChanged(WebView view, int newProgress) {
if (newProgress == 100) {
progressbar.setVisibility(GONE); // 加载完成隐藏进度条
} else {
if (progressbar.getVisibility() == GONE)
progressbar.setVisibility(VISIBLE);
progressbar.setProgress(newProgress);
}
super.onProgressChanged(view, newProgress);
}
}
@Override
protected void onScrollChanged(int l, int t, int oldl, int oldt) {
LayoutParams lp = (LayoutParams) progressbar.getLayoutParams();
lp.x = l;
lp.y = t;
progressbar.setLayoutParams(lp);
super.onScrollChanged(l, t, oldl, oldt);
}
}
在xml中使用:
android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="@dimen/content_padding" >
android:id="@+id/webview"
android:layout_width="match_parent"
android:layout_height="match_parent" />
android:id="@+id/tv_error"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center|center_vertical"
android:text="查询失败"
android:visibility="gone" />
在Activity中使用:
/*******************************************************************************
*
* Copyright (c) Weaver Info Tech Co. Ltd
*
* SelectActivity
*
* app.ui.activity.service.SelectActivity.java
* TODO: File description or class description.
*
* @author: Administrator
* @since: -5-16
* @version: 1.0.0
*
* @changeLogs:
* 1.0.0: First created this class.
*
******************************************************************************/
package app.ui.activity.service;
import mobi.kuaidian.qunakao.R;
import android.content.Intent;
import android.os.Bundle;
import android.view.KeyEvent;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import app.ui.widget.ProgressWebView;
/**
* @author Administrator
*
*/
public class ResultActivity extends Activity{
public static final String SELECT_XUELI = "/xlcx/lscx.jsp"; //学历查询地址
private ProgressWebView mWebView;
private WebSettings mWebSettings;
/* (non-Javadoc)
* @see app.ui.TitleActivity#onCreate(android.os.Bundle)
*/
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setUpViews();
}
private void setUpViews()
{
setContentView(R.layout.activity_result);
showBackwardView(R.string.button_backward, true);
mWebView = (ProgressWebView)findViewById(R.id.webview);
mWebView.loadUrl(BaseActivity.SELECT_XUELI);
mWebSettings = mWebView.getSettings();
mWebSettings.setJavaScriptEnabled(true); //允许加载javascript
mWebSettings.setSupportZoom(true); //允许缩放
mWebSettings.setBuiltInZoomControls(true); //原网页基础上缩放
mWebSettings.setUseWideViewPort(true); //任意比例缩放
/*****************************************************************
* 在点击请求的是链接时才会调用,重写此方法返回true表明点击网页里
* 面的链接还是在当前的WebView里跳转,不会跳到浏览器上运行。
*****************************************************************/
mWebView.setWebViewClient(new WebViewClient(){
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return super.shouldOverrideUrlLoading(view, url);
}
});
}
/***********************************************************
* 监听返回键
* 注:这里的返回键是指在加载的网页中进入了另一个连接,点击返回
***********************************************************/
public boolean onKeyDown(int keyCode, KeyEvent event) {
if ((keyCode == KeyEvent.KEYCODE_BACK) && mWebView.canGoBack()) {
mWebView.goBack();
return true;
}
return super.onKeyDown(keyCode, event);
}
}
AndroidManifest.xml添加权限:
效果图显示: