Android的 - 在旋转preventing的WebView重装 [英] Android - Preventing WebView reload on Rotate
问题描述
当我旋转我的屏幕,web视图重新加载整个页面。我不能让这一点,因为我的某些内容包含动态/随机材料。目前,当旋转屏幕重新载入使用loadURL()方法的原始URL。
任何想法有什么不对我的code?
MainActivity.java 的
包com.mark.myapp;
进口android.app.Activity;
进口android.os.Bundle;
进口android.util.Log;
进口android.view.KeyEvent;
进口android.view.Menu;
进口android.webkit.WebView;
进口android.webkit.WebViewClient;
公共类MainActivity延伸活动{
的WebView网页;
字符串WEBURL =http://www.google.co.uk/;
@覆盖
公共无效的onCreate(包savedInstanceState){
super.onCreate(savedInstanceState);
的setContentView(R.layout.activity_main);
如果(savedInstanceState!= NULL)
((web视图)findViewById(R.id.web))restoreState(savedInstanceState)。
网页=(web视图)findViewById(R.id.web);
web.getSettings()setJavaScriptEnabled(真)。
web.loadUrl(WEBURL);
web.setPadding(0,0,0,0);
。web.getSettings()setLoadWithOverviewMode(真正的);
。web.getSettings()setUseWideViewPort(真正的);
。web.getSettings()setSupportZoom(真正的);
。web.getSettings()setBuiltInZoomControls(真正的);
web.setWebViewClient(新HelloWebViewClient());
}
@覆盖
公共布尔onCreateOptionsMenu(功能菜单){
。getMenuInflater()膨胀(R.menu.activity_main,菜单);
返回true;
}
私有类HelloWebViewClient扩展WebViewClient {
公共布尔shouldOverrideUrlLoading(web视图网站,字符串URL){
web.loadUrl(URL);
返回true;
}
}
公共布尔的onkeydown(INT键code,KeyEvent的事件){
如果((钥匙code == KeyEvent.KEY code_BACK)及和放大器; web.canGoBack()){
web.goBack();
返回true;
}
返回super.onKeyDown(键code,事件);
}
}
的AndroidManifest.xml 的
<舱单的xmlns:机器人=http://schemas.android.com/apk/res/android
包=com.mark.myapp
安卓版code =1
机器人:VERSIONNAME =1.0>
<用途-SDK
安卓的minSdkVersion =8
机器人:targetSdkVersion =15/>
<应用
机器人:图标=@可绘制/ ic_launcher
机器人:标签=@字符串/ APP_NAME
机器人:主题=@风格/ AppTheme>
<活动
机器人:名称=。MainActivity
机器人:configChanges =方向| keyboardHidden>
<意向滤光器>
<作用机器人:名称=android.intent.action.MAIN/>
<类机器人:名称=android.intent.category.LAUNCHER/>
&所述; /意图滤光器>
< /活性GT;
< /用途>
<使用-权限的Android:名称=android.permission.INTERNET对/>
< /舱单>
我认为主要的问题是,你调用web.loadUrl(WEBURL);此外,当savedInstanceState!= NULL
修改
尝试:
如果(savedInstanceState == NULL)
{
web.loadUrl(WEBURL);
}
EDIT2 :你还需要的onSaveInstanceState和onRestoreInstanceState覆盖
@覆盖
保护无效的onSaveInstanceState(包outState)
{
super.onSaveInstanceState(outState);
web.saveState(outState);
}
@覆盖
保护无效onRestoreInstanceState(包savedInstanceState)
{
super.onRestoreInstanceState(savedInstanceState);
web.restoreState(savedInstanceState);
}
When I rotate my screen, the WebView reloads the whole page. I can't have this since some of my content contains dynamic/random material. Currently when rotated the screen reloads the original URL from the loadUrl() method.
Any idea what's wrong with my code?
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>
I think the main problem is that you call web.loadUrl(webURL); also when savedInstanceState != null
EDIT
Try:
if (savedInstanceState == null)
{
web.loadUrl(webURL);
}
EDIT2: You also need the onSaveInstanceState and onRestoreInstanceState override.
@Override
protected void onSaveInstanceState(Bundle outState )
{
super.onSaveInstanceState(outState);
web.saveState(outState);
}
@Override
protected void onRestoreInstanceState(Bundle savedInstanceState)
{
super.onRestoreInstanceState(savedInstanceState);
web.restoreState(savedInstanceState);
}
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