WebView頭部進度條展現

首先在res==》drawable中設置樣式

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android" >
 
    <!-- 背景  gradient是漸變,corners定義的是圓角 -->
    <item android:id="@android:id/background">
        <shape>
            <corners android:radius="1dp" />
 
            <solid android:color="#E2E2E2" />
        </shape>
    </item>
    <!-- 進度條 -->
    <item android:id="@android:id/progress">
        <clip>
            <shape>
                <corners android:radius="1dip" />
 
                <solid android:color="#ff3f51b5" />
            </shape>
        </clip>
    </item>
 
</layer-list>

XML中在WebView上方 標題下方設置

<ProgressBar
    android:id="@+id/html5_currency_progressbar_id"
    style="@android:style/Widget.ProgressBar.Horizontal"
    android:layout_width="fill_parent"
    android:layout_height="3.0dip"
    android:progressDrawable="@drawable/detail_progress" />
    <!--android:layout_below="@+id/aaaa"//在某元素的的下方-->
    <!--android:layout_alignBottom="@+id/aaaa"//本元素的下邊緣和某元素的的下邊緣對齊-->

代碼中調用

mWeb = (WebView) findViewById(R.id.web);
progressBar = (ProgressBar) findViewById(R.id.html5_currency_progressbar_id);

mWeb.setWebChromeClient(new WebChromeClient() {
    public void onProgressChanged(WebView view, int progress) {
        Log.e("TAG", "onProgressChanged: " + progress);
        if (progressBar != null) {
            if (progress == 100) {
                progressBar.setVisibility(View.GONE);
            } else {
                progressBar.setProgress(progress);
            }
        }
    }
});

mWeb.loadUrl(url);