2019独角兽企业重金招聘Python工程师标准>>> 
1.xml文件中创建布局：<ProgressBar
style="?android:attr/progressBarStyleHorizontal"
android:layout_width="match_parent"
android:background="@color/xinhua"
android:layout_height="8px"
android:id="@+id/bar"
/>
2.w2.setWebChromeClient(new WebChromeClient(){
@Override
public void onProgressChanged(WebView view, int newProgress) {
if(newProgress==100)
{
pbar.setVisibility(View.INVISIBLE);//隐藏
}
else{
if(View.INVISIBLE==pbar.getVisibility()){//如果进度框不可见，设成可见
pbar.setVisibility(View.VISIBLE);
}
pbar.setProgress(newProgress);
}
super.onProgressChanged(view, newProgress);
}
});
}