防止在Rotate上重新加载WebView – Android Studio

当我旋转屏幕时，WebView会重新加载整个页面。 所以我在Android_Manifest.xml文件中禁用了旋转，但如果我可以进行旋转，那将非常酷。

SkateTube.java –

package com.example.skatetube.skatetube; import android.os.Bundle; import android.support.design.widget.FloatingActionButton; import android.support.design.widget.Snackbar; import android.support.v7.app.AppCompatActivity; import android.support.v7.widget.Toolbar; import android.view.View; import android.view.Menu; import android.view.MenuItem; import android.webkit.WebSettings; import android.webkit.WebView; import android.webkit.WebViewClient; public class SkateTube extends AppCompatActivity { private WebView mWebView; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_skatetube); mWebView = (WebView) findViewById(R.id.activity_main_webview); WebSettings webSettings = mWebView.getSettings(); webSettings.setJavaScriptEnabled(true); if (savedInstanceState == null) { mWebView.loadUrl("http://skatetube.sytes.net/"); mWebView.setWebViewClient(new WebViewClient()); } @Override public void onBackPressed() { if(mWebView.canGoBack()) { mWebView.goBack(); } else { super.onBackPressed(); } } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.menu_skate_tube, menu); return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { // Handle action bar item clicks here. The action bar will // automatically handle clicks on the Home/Up button, so long // as you specify a parent activity in AndroidManifest.xml. int id = item.getItemId(); //noinspection SimplifiableIfStatement if (id == R.id.action_settings) { return true; } return super.onOptionsItemSelected(item); } } 

Android_manifest.xml

Answer 1

必须要做3分。 这对我来说是一个完整的解决方案。

1. AndroidManifest.xml需要在android：configChanges中为目标活动配置orientation和screenSize

2. 需要覆盖onSaveInstanceState和onRestoreInstanceState的Activity才能使状态可以在旋转时恢复

    @Override protected void onSaveInstanceState(Bundle outState ) { super.onSaveInstanceState(outState); mWebView.saveState(outState); } @Override protected void onRestoreInstanceState(Bundle savedInstanceState) { super.onRestoreInstanceState(savedInstanceState); mWebView.restoreState(savedInstanceState); } 

3. 屏幕旋转时不再加载URL，使用savedInstanceState了解目标活动的ocCreate（）中的当前状态

    @Override protected void onCreate(@Nullable Bundle savedInstanceState) { mWebView = (WebView) findViewById(R.id.webView_h5); if (savedInstanceState == null) { mWebView.loadUrl(url); } } 

错过这三个中的任何一个，我的活动仍在重新加载。

Answer 2

您需要做的就是覆盖onSaveInstanceState和onRestoreInstanceState 。

 @Override protected void onSaveInstanceState(Bundle outState ){ super.onSaveInstanceState(outState); mWebView.saveState(outState); } @Override protected void onRestoreInstanceState(Bundle savedInstanceState){ super.onRestoreInstanceState(savedInstanceState); mWebView.restoreState(savedInstanceState); } 

另一个解决方案可能是将清单中的Activity标记更新为

 android:configChanges="keyboard|keyboardHidden|orientation|screenLayout|uiMode|screenSize|smallestScreenSize" 

Answer 3

不需要java代码只需复制此代码代替Manifest.xml中的activity标记