Question

我正在寻找一段时间如何永远运行我的WebView。当调用android函数onPause（）/ onResume（）时。我的WebView再次启动。

我希望WebView继续下去。也许最好通过简单的HTML示例来解释：

<html><head><title>Webview test Android</title></head>
<body>
  <h1><div id="counter"></div></h1>
  <script>
   var counter = 0;
   document.getElementById("counter").innerHTML = counter;
   setTimeout(function(){ count(); }, 1000);

   function count() {
      counter++;
      document.getElementById("counter").innerHTML = counter;
      console.log("counter: " + counter);
      setTimeout(function(){ count(); }, 1000);
   } 
</script>
</body>
</html>

我在应用行为中想要的是：

> Open the app
  + Html page starts counting
> Press the home button / multitask button
  + Html page is still counting (or doing other stuff)
> Get back to the app
  + Html page is still counting and dont reload.

首先，我将自己的代码用于WebView。但是对于很多Android版本，我使用了chrome-webview example from github

我研究了android WebView方法，但我无法找到解决方案。我也试过mWebView.onPause（），mWebView.onResume（）......没有结果。也许有人可以把我带到正确的方向。

这是主要功能：

private WebView mWebView;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    Log.v("main"," create ");
    setContentView(R.layout.activity_main);
    mWebView = (WebView) findViewById(R.id.activity_main_webview);
    mWebView.addJavascriptInterface(new NotificationBindObject(getApplicationContext()), "NotificationBind");
    mWebView.getSettings().setDomStorageEnabled(true); // use localstorage
    setUpWebViewDefaults(mWebView);
    if (savedInstanceState != null) {
        mWebView.restoreState(savedInstanceState);
    }

    if(mWebView.getUrl() == null) {
        mWebView.loadUrl("file:///android_asset/www/index.html");
    }
 }

@Override
public void onSaveInstanceState(Bundle savedInstanceState) {
    // Save the WebView state (including history stack)
    mWebView.saveState(savedInstanceState);
    // Always call the superclass so it can save the view hierarchy state
    super.onSaveInstanceState(savedInstanceState);
}

更新

几乎就是......我制作了一个运行WebView的服务。

public class TestService extends Service {
    private static WebView w;
    private static MainActivity ma;
    @Override
    public IBinder onBind(Intent arg0) {
        return null;
    }
    @Override
    public void onCreate() {       
            super.onCreate();
    }
    public static void setMain(MainActivity a) {
        ma = a;
        Log.e("main", " setData " );
        setView();
    }

    private static void setView() {
        w = (WebView) ma.findViewById(R.id.webView);
        Log.e("main", " setData ");
        w.getSettings().setDomStorageEnabled(true); // use localstorage
        w.getSettings().setJavaScriptEnabled(true);
        //ma.setUpWebViewDefaults(w);
        w.loadUrl("file:///android_asset/www/index.html");
    }
}

MainActivity

@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        Log.v("main"," create ");

        if (savedInstanceState == null) {
            setContentView(R.layout.activity_main);
            Intent i = new Intent(MainActivity.this, TestService.class);
            TestService.setMain(this);
            MainActivity.this.startService(i);
        } else {
            ...
        }
        ...
    }

现在我看到console.log（“counter”+ counter）;在Eclipse中登录。唯一的问题是，当我回来时，布局中的WebView已经消失了......

保持webview始终运行

0 个答案: