Android 自定义标题栏 显示网页加载进度的方法实例

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
  xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent">

    <com.android.CustomTitleTest.AlwaysMarqueeTextView
            android:id="@+id/tvtitle"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content" android:focusableInTouchMode="true"
            android:singleLine="true" android:ellipsize="marquee"
            android:focusable="false" android:marqueeRepeatLimit="marquee_forever"
            android:layout_centerVertical="true"/>

    <ProgressBar android:id="@+id/pb"
        android:layout_width="fill_parent" android:layout_height="2sp"
        style="?android:attr/progressBarStyleHorizontal"
        android:visibility="gone" android:layout_alignParentBottom="true"
        ></ProgressBar>
</RelativeLayout>
 

public class MyWebChromeClient extends WebChromeClient {

    private Activity activity;
    private ProgressBar pb;
    private TextView tvtitle;
    public MyWebChromeClient(Activity activity) {
        this.activity = activity;
    }
    Animation animation;
    @Override
    public void onProgressChanged(WebView view, int newProgress) {
        pb=(ProgressBar)activity.findViewById(R.id.pb);
        pb.setMax(100);
        if(newProgress<100){
            if(pb.getVisibility()==View.GONE)
                pb.setVisibility(View.VISIBLE);
            pb.setProgress(newProgress);
        }else{
            pb.setProgress(100);
            animation=AnimationUtils.loadAnimation(activity, R.anim.animation);
            // 运行动画 animation
            pb.startAnimation(animation);
            // 将 spinner 的可见性设置为不可见状态
            pb.setVisibility(View.INVISIBLE);
        }

        super.onProgressChanged(view, newProgress);
    }

    @Override
    public void onReceivedTitle(WebView view, String title) {
        tvtitle=(TextView)activity.findViewById(R.id.tvtitle);
        tvtitle.setText(title);
        super.onReceivedTitle(view, title);
    }

}
 

<?xml version="1.0" encoding="utf-8"?>

<set xmlns:android="http://schemas.android.com/apk/res/android">

       <alpha android:fromAlpha="1.0" android:toAlpha="0.0" android:duration="700"/> 
</set>

    private WebView browser;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        getWindow().requestFeature(Window.FEATURE_CUSTOM_TITLE);
        setContentView(R.layout.main);
        getWindow().setFeatureInt(Window.FEATURE_CUSTOM_TITLE, R.layout.broser_custom_title);
        browser = (WebView) findViewById(R.id.my_browser);
        // currentWebView=browser;
        browser.setWebChromeClient(new MyWebChromeClient(Main.this));
        browser.loadUrl("https://www.jb51.net");
    }