Android如何防止在屏幕关闭/打开时重新加载webview？

我看到很多与我的问题有关的文档和文章，但我没有得到任何适当的解决方案。当我按下电源按钮打开/关闭时，WebView将被重新加载。我不想重新加载WebView。Android如何防止在屏幕关闭/打开时重新加载webview？

我是什么想是....

protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    requestWindowFeature(Window.FEATURE_NO_TITLE); 
    this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, 
    WindowManager.LayoutParams.FLAG_FULLSCREEN); 
    setContentView(R.layout.activity_main); 
    StrictMode.ThreadPolicy policy = new 
    StrictMode.ThreadPolicy.Builder().permitAll().build(); 
    StrictMode.setThreadPolicy(policy); 
    loadpages(); 
} 
private BroadcastReceiver receiver = new BroadcastReceiver() { 
    @Override 
    public void onReceive(Context context, Intent intent) { 
     if (!ConnectivityStatus.isConnected(context)) { 
      // no connection 
      WebView wv = (WebView) findViewById(R.id.webView1); 
      wv.loadData(iError, "text/html", "UTF-8"); 
      // Toast.makeText(getApplicationContext(),"Internet connection failure",Toast.LENGTH_SHORT).show(); 
     } 
    } 
}; 

@Override 
protected void onResume() { 
    super.onResume(); 
    this.registerReceiver(receiver, new 
IntentFilter(ConnectivityManager.CONNECTIVITY_ACTION)); 
} 
@Override 
protected void onPause() { 
    super.onPause(); 
    this.unregisterReceiver(receiver); 
} 
@Override 
public void onBackPressed() { 
    AlertDialog.Builder alertDialog = new 
    AlertDialog.Builder(MainActivity.this); 
    alertDialog.setTitle("Local"); 
    alertDialog.setMessage("Exit Application"); 
    alertDialog.setCancelable(true); 
    alertDialog.setPositiveButton("YES", new 
    DialogInterface.OnClickListener() { 
     public void onClick(DialogInterface dialog, int which) { 
     // User pressed YES button. Write Logic Here 
      MainActivity.this.finish(); 
     } 
    }); 
    alertDialog.setNegativeButton("NO", new 
    DialogInterface.OnClickListener() { 
     public void onClick(DialogInterface dialog, int which) { 
      // User pressed No button. Write Logic Here 
      // Toast.makeText(getApplicationContext(), "You clicked on 
      NO", Toast.LENGTH_SHORT).show(); 
     } 
    }); 
    alertDialog.show(); 
} 
@Override 
public void onConfigurationChanged(Configuration newConfig) { 
    super.onConfigurationChanged(newConfig); 
} 
@SuppressLint("NewApi") 
public boolean loadpages() { 
    WebView wv = (WebView) findViewById(R.id.webView1); 
    WebSettings webSettings = wv.getSettings(); 
    webSettings.setJavaScriptEnabled(true); 
    wv.getSettings().setLoadWithOverviewMode(true); 
    wv.getSettings().setUseWideViewPort(true); 
    CookieManager.getInstance().setAcceptCookie(true); 
    TelephonyManager mngr = (TelephonyManager) 
    getSystemService(Context.TELEPHONY_SERVICE); 
    String imeino = mngr.getDeviceId().toString(); 
    CookieManager.getInstance().setCookie 
    ("http://MyLocalHost/projects/aaaaa", "IMEINO=" + imeino); 
    String url = "http://MyLocalHost/projects/aaaaa/index.php" 
    wv.setWebViewClient(new WebViewClient() { 
    public boolean shouldOverrideUrlLoading(WebView view, String url) { 
    if (!loadingFinished) { 
    redirect = true; 
    } 
    loadingFinished = false; 
    view.loadUrl(url); 
    return true; 
    } 
    @SuppressWarnings("unused") 
    public void onPageStarted(WebView view, String url) { 
    loadingFinished = false; 
    // SHOW LOADING IF IT ISNT ALREADY VISIBLE 
    } 
    public void onPageFinished(WebView view, String url) { 
    if (!redirect) { 
    loadingFinished = true; 
    } 
    if (loadingFinished && !redirect) { 
    // HIDE LOADING IT HAS FINISHED 
    } else { 
    redirect = false; 
    } 
    } 
    }); 
    loadingFinished = false; 
    wv.loadUrl(url); 
    return loadingFinished; 
}}

我想我最好的。我还在AndroidManifest.xml文件中添加了android:launchMode="singleTask"。你们能为我的问题提供任何解决方案吗？

来源

2017-10-09 karthi

检查广播接收机onReceive（）。如果你正在接收onResume（），你的webview将在片段/活动恢复时加载。 – james

@james yup我checked.but没有得到任何解决方案 – karthi

尝试：

if (savedInstanceState == null) 
{ 
web.loadUrl(webURL); 
}

来源

2017-10-09 05:15:34

不工作.... – karthi

尝试删除恢复（）和暂停方法（）内容.. –

它也需要... – karthi

尝试在你的生命周期方法添加：

@Override 
protected void onSaveInstanceState(Bundle outState) 
{ 
super.onSaveInstanceState(outState); 
web.saveState(outState); 
} 

@Override 
protected void onRestoreInstanceState(Bundle savedInstanceState) 
{ 
super.onRestoreInstanceState(savedInstanceState); 
web.restoreState(savedInstanceState); 
}

来源

2017-10-09 05:50:09 A2N

检查，我的意思是把登录OnCreate中，在onPause，的onResume，loadpages方法 – A2N

@ A2N在锁屏应用程序调用的onPause或onStop.screen解锁应用拨打电话简历。 – karthi

它不起作用 – karthi

尝试

@Override 
protected void onStart() { 
    super.onStart(); 
    this.registerReceiver(receiver, new IntentFilter(ConnectivityManager.CONNECTIVITY_ACTION)); 
} 

@Override 
protected void onStop() { 
    super.onStop(); 
    this.unregisterReceiver(receiver); 
}

，而不是

@Override 
protected void onResume() { 
    super.onResume(); 
    this.registerReceiver(receiver, new IntentFilter(ConnectivityManager.CONNECTIVITY_ACTION)); 
} 

@Override 
protected void onPause() { 
    super.onPause(); 
    this.unregisterReceiver(receiver); 
}

来源

2017-10-09 08:18:22

不，它不工作 – karthi

Android如何防止在屏幕关闭/打开时重新加载webview？

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