安卓-防止WebView在旋转时重新加载
安卓-防止WebView在旋转时重新加载
提问于 2012-08-26 22:42:12
当我旋转屏幕时，WebView会重新加载整个页面。我不能有这个，因为我的一些内容包含动态/随机的材料。当前，当旋转时，屏幕从loadUrl()方法重新加载原始的URL。
你知道我的代码出了什么问题吗？
MainActivity.java
package com.mark.myapp;
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.KeyEvent;
import android.view.Menu;
import android.webkit.WebView;
import android.webkit.WebViewClient;
public class MainActivity extends Activity {
WebView web;
String webURL = "http://www.google.co.uk/";
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
if (savedInstanceState != null)
((WebView)findViewById(R.id.web)).restoreState(savedInstanceState);
web = (WebView) findViewById(R.id.web);
web.getSettings().setJavaScriptEnabled(true);
web.loadUrl(webURL);
web.setPadding(0, 0, 0, 0);
web.getSettings().setLoadWithOverviewMode(true);
web.getSettings().setUseWideViewPort(true);
web.getSettings().setSupportZoom(true);
web.getSettings().setBuiltInZoomControls(true);
web.setWebViewClient(new HelloWebViewClient());
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
private class HelloWebViewClient extends WebViewClient {
public boolean shouldOverrideUrlLoading(WebView web, String url) {
web.loadUrl(url);
return true;
}
}
public boolean onKeyDown(int keyCode, KeyEvent event) {
if ((keyCode == KeyEvent.KEYCODE_BACK) && web.canGoBack()) {
web.goBack();
return true;
}
return super.onKeyDown(keyCode, event);
}
}AndroidManifest.xml
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.mark.myapp"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="15" />
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".MainActivity"
android:configChanges="orientation|keyboardHidden">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
<uses-permission android:name="android.permission.INTERNET"/>
</manifest>回答 12
Stack Overflow用户
回答已采纳
发布于 2012-08-26 22:50:18
我认为主要的问题是当savedInstanceState != null时调用web.loadUrl(webURL)；
编辑
尝试：
if (savedInstanceState == null)
{
web.loadUrl(webURL);
}EDIT2：您还需要onSaveInstanceState和onRestoreInstanceState覆盖。
@Override
protected void onSaveInstanceState(Bundle outState )
{
super.onSaveInstanceState(outState);
web.saveState(outState);
}
@Override
protected void onRestoreInstanceState(Bundle savedInstanceState)
{
super.onRestoreInstanceState(savedInstanceState);
web.restoreState(savedInstanceState);
}注意:请在您的Activity android:configChanges="orientation|screenSize“中添加您的AndroidManifest.xml谢谢
Stack Overflow用户
发布于 2013-10-24 17:21:19
编辑：找到了更合适的解决方案。
最新消息：
在AndroidManifest.xml中
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.Example.WebviewSample">
<application
<activity android:name=".WebViewActivity"
<!-- ADD THIS -->
android:configChanges="orientation|screenSize">
</activity>
</application>
</manifest>在WebViewActivity.java文件中，将此代码添加到onCreate()方法中
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
wView = (WebView) findViewById(R.id.webView);
if (savedInstanceState == null) {
wView.loadUrl("https://google.com");
}
}同时更新onSaveInstanceState
@Override
protected void onSaveInstanceState(Bundle outState)
{
super.onSaveInstanceState(outState);
wView.saveState(outState);
}和onRestoreInstanceState
@Override
protected void onRestoreInstanceState(Bundle savedInstanceState)
{
super.onRestoreInstanceState(savedInstanceState);
wView.restoreState(savedInstanceState);
}旧版：
不需要java编码。在您的清单文件中使用它。
android:configChanges="keyboard|keyboardHidden|orientation|screenLayout|uiMode|screenSize|smallestScreenSize"像这样：
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.Example.WebviewSample.webviewsample"
android:configChanges="keyboard|keyboardHidden|orientation|screenLayout|uiMode|screenSize|smallestScreenSize"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>Stack Overflow用户
发布于 2015-01-15 23:48:57
在标签中(清单)
android:configChanges="orientation|screenSize"页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/12131025
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