Android WebView实现顶部进度条
项目中用到WebView加上进度条放在顶部,让用户知道加载进度情况,可以提高用户体验:
效果:
布局:
<RelativeLayout android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical"> <WebView android:id="@+id/webView" android:layout_width="match_parent" android:layout_height="match_parent" android:layout_below="@+id/toolbar_container" /> <ProgressBar android:id="@+id/progressBar" style="@style/crowd_item_progressBar" android:layout_width="match_parent" android:layout_height="3dp" android:layout_below="@+id/toolbar_container" android:background="@drawable/crowd_progressbar_unselect" /> </RelativeLayout>
进度条样式:
<style name="crowd_item_progressBar"> <item name="android:indeterminateOnly">false</item> <item name="android:progressDrawable">@drawable/crowd_progressbar_background</item> <item name="android:minHeight">10dp</item> <item name="android:maxHeight">10dp</item> </style>
进度图片:
<layer-list xmlns:android="http://schemas.android.com/apk/res/android"> <item android:id="@android:id/progress" > <clip> <shape> <solid android:color="@color/selected"/> <!--<corners android:radius="1.5dp"/>--> </shape> </clip> </item> </layer-list>
代码:
public class WebChromeClient extends android.webkit.WebChromeClient { @Override public void onProgressChanged(WebView view, int newProgress) { if (newProgress == 100) { mProgressBar.setVisibility(GONE); } else { if (mProgressBar.getVisibility() == GONE) mProgressBar.setVisibility(VISIBLE); mProgressBar.setProgress(newProgress); } super.onProgressChanged(view, newProgress); } } @Override protected void onScrollChanged(int l, int t, int oldl, int oldt) { LayoutParams lp = (LayoutParams) mProgressBar.getLayoutParams(); lp.x = l; lp.y = t; mProgressBar.setLayoutParams(lp); super.onScrollChanged(l, t, oldl, oldt); } }
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