android中的webview进度条

importandroid.app.Activity;
importandroid.graphics.Color;
importandroid.os.Bundle;
importandroid.os.Handler;
importandroid.view.Menu;
importandroid.view.View;
importandroid.webkit.WebChromeClient;
importandroid.webkit.WebView;
importandroid.webkit.WebViewClient;
importandroid.widget.LinearLayout;
importandroid.widget.ProgressBar;
importandroid.widget.TextView;
publicclassMainActivityextendsActivity{
Handlerhandler;
WebViewwv;
TextViewtextView;
ProgressBarprogressBar;
@Override
publicvoidonCreate(BundlesavedInstanceState){
super.onCreate(savedInstanceState);
//requestWindowFeature(Window.FEATURE_NO_TITLE);
//getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
//WindowManager.LayoutParams.FLAG_FULLSCREEN);
LinearLayoutrootViewLayout=newLinearLayout(this);
rootViewLayout.setOrientation(LinearLayout.VERTICAL);
textView=newTextView(this);
textView.setTextColor(Color.RED);
//生成水平进度条
progressBar=newProgressBar(this,null,android.R.attr.progressBarStyleHorizontal);
wv=newWebView(this);
rootViewLayout.addView(textView);
rootViewLayout.addView(progressBar);
rootViewLayout.addView(wv);
setContentView(rootViewLayout);
wv.getSettings().setAllowFileAccess(true);
wv.getSettings().setJavaScriptEnabled(true);
//这里吐槽一下这J8网站写你妹的排队,排你大爷
wv.loadUrl("http://www.12306.cn");
wv.setWebViewClient(newWebViewClient(){
@Override
publicvoidonPageFinished(WebViewview,Stringurl){
//TODOAuto-generatedmethodstub
super.onPageFinished(view,url);
//页面下载完毕,却不代表页面渲染完毕显示出来
//WebChromeClient中progress==100时也是一样
if(wv.getContentHeight()!=0){
//这个时候网页才显示
}
}
@Override
publicbooleanshouldOverrideUrlLoading(WebViewview,Stringurl){
//TODOAuto-generatedmethodstub
//自身加载新链接,不做外部跳转
view.loadUrl(url);
returntrue;
}
});
wv.setWebChromeClient(newWebChromeClient(){
@Override
publicvoidonProgressChanged(WebViewview,intnewProgress){
//TODOAuto-generatedmethodstub
super.onProgressChanged(view,newProgress);
//这里将textView换成你的progress来设置进度
//if(newProgress==0){
//textView.setVisibility(View.VISIBLE);
//progressBar.setVisibility(View.VISIBLE);
//}
textView.setText(newProgress+"");
textView.postInvalidate();
progressBar.setProgress(newProgress);
progressBar.postInvalidate();
//if(newProgress==100){
//textView.setVisibility(View.GONE);
//progressBar.setVisibility(View.GONE);
//}
}
});
}
@Override
publicbooleanonCreateOptionsMenu(Menumenu){
getMenuInflater().inflate(R.menu.activity_main,menu);
returntrue;
}
}

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