问题描述
我有一个应用程序,其中有一个 WebView
用于显示一些网站.它有效,单击网页中的链接会转到我的应用程序内网站的下一页.但是当我点击手机的后退按钮时,它会直接带我进入我的应用程序.我想返回到网站的上一页.我该怎么做?
I have an app in which I have a WebView
where I display some websites. It works, clicking a link in the webpage goes to the next page in the website inside my app. But when I click the phone's back button, it takes me straight into my app. I want to go back to the previous page in the website instead. How can I do this?
这是我正在使用的代码示例:
Here is the code sample I'm using:
public class Webdisplay extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
this.getWindow().requestFeature(Window.FEATURE_PROGRESS);
setContentView(R.layout.webdisplay);
getWindow().setFeatureInt(Window.FEATURE_PROGRESS,
Window.PROGRESS_VISIBILITY_ON);
Toast loadingmess = Toast.makeText(this,
"Cargando El Diario de Hoy", Toast.LENGTH_SHORT);
loadingmess.show();
WebView myWebView;
myWebView = (WebView) findViewById(R.id.webview);
myWebView.getSettings().setJavaScriptEnabled(true);
myWebView.loadUrl("http://www.elsalvador.com");
myWebView.setWebViewClient(new WebViewClient());
myWebView.setInitialScale(1);
myWebView.getSettings().setBuiltInZoomControls(true);
myWebView.getSettings().setUseWideViewPort(true);
final Activity MyActivity = this;
myWebView.setWebChromeClient(new WebChromeClient()
{
public void onProgressChanged(WebView view, int progress)
{
MyActivity.setTitle("Loading...");
MyActivity.setProgress(progress * 100);
if(progress == 100)
MyActivity.setTitle(R.string.app_name);
}
});
}
}
推荐答案
我在我的 WebViews 活动中使用了这样的东西:
I use something like this in my activities with WebViews:
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if (event.getAction() == KeyEvent.ACTION_DOWN) {
switch (keyCode) {
case KeyEvent.KEYCODE_BACK:
if (mWebView.canGoBack()) {
mWebView.goBack();
} else {
finish();
}
return true;
}
}
return super.onKeyDown(keyCode, event);
}
要使此代码起作用,您需要向包含 WebView 的 Activity
添加一个字段:
For this code to work, you need to add a field to the Activity
containing the WebView:
private WebView mWebView;
在 onCreate()
方法中初始化它,你应该很高兴.
Initialize it in the onCreate()
method and you should be good to go.
mWebView = (WebView) findViewById(R.id.webView);
这篇关于如果在 WebView 中按下后退按钮,如何返回上一页?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!