添加一个进度条并将其显示出来。您可以根据需要自定义下面的内容。加载速度取决于连接速度,为了更快地加载。
覆盖 onPageFinished
并在 webcount 中将可见性设置为 gone。
public class MainActivity extends Activity {
WebView web;
ProgressBar progressBar;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
web = (WebView) findViewById(R.id.wv);
progressBar = (ProgressBar) findViewById(R.id.progressBar);
web.setWebViewClient(new myWebClient());
web.getSettings().setJavaScriptEnabled(true);
web.loadUrl("http://slashdot.org/");
}
public class myWebClient extends WebViewClient
{
@Override
public void onPageStarted(WebView view, String url, Bitmap favicon) {
super.onPageStarted(view, url, favicon);
}
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true;
}
@Override
public void onReceivedError(WebView view, int errorCode,
String description, String failingUrl) {
Toast.makeText(MainActivity.this, "Oh no! " + description, Toast.LENGTH_SHORT).show();
}
@Override
public void onPageFinished(WebView view, String url) {
super.onPageFinished(view, url);
progressBar.setVisibility(View.GONE);
}
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event)
{
if ((keyCode == KeyEvent.KEYCODE_BACK) && web.canGoBack()) {
web.goBack();
return true;
}
else
{
finish();
return true;
}
}
}
xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".MainActivity" >
<WebView
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_above="@+id/button1"
android:id="@+id/wv"/>
<ProgressBar
android:id="@+id/progressBar"
android:layout_width="wrap_content"
android:layout_centerInParent="true"
android:layout_height="wrap_content"
/>
</RelativeLayout>
快照
不滚动页面,您将看不到整个页面。
![输入图片说明](https://istack.dev59.com/JXPyL.webp)
向右滚动后
![输入图片说明](https://istack.dev59.com/Fep1m.webp)