如何在Android webview中永久保存cookie？

通过下面的代码，我已经能够保存 cookie，但是一旦我关闭应用程序，cookie 就会消失。

这是如何引起的以及如何解决？

package com.jkjljkj

import android.app.Activity;
import android.os.Bundle;
import android.view.Window;
import android.webkit.CookieSyncManager;
import android.webkit.WebChromeClient;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.Toast;

public class Activity extends Activity {

    /** Called when the activity is first created. */

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        CookieSyncManager.createInstance(getBaseContext());

        // Let's display the progress in the activity title bar, like the
        // browser app does.


        getWindow().requestFeature(Window.FEATURE_PROGRESS);

        WebView webview = new WebView(this);
        setContentView(webview);


        webview.getSettings().setJavaScriptEnabled(true);

        final Activity activity = this;
        webview.setWebChromeClient(new WebChromeClient() {
        public void onProgressChanged(WebView view, int progress) {
             // Activities and WebViews measure progress with different scales.
             // The progress meter will automatically disappear when we reach 100%
             activity.setProgress(progress * 1000);
        }
      });

      webview.setWebViewClient(new WebViewClient() {

         public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) {
              //Users will be notified in case there's an error (i.e. no internet connection)
              Toast.makeText(activity, "Oh no! " + description, Toast.LENGTH_SHORT).show();
         }
      });

      CookieSyncManager.getInstance().startSync();
      CookieSyncManager.getInstance().sync();

     //This will load the webpage that we want to see
      webview.loadUrl("http://");

   }
}

您必须告诉 CookieSyncManager 进行同步after它已加载有问题的页面。在您的示例代码中，onCreate方法在之前完全执行WebView尝试加载页面，因此同步过程（异步发生）可能会在页面加载之前完成。

相反，告诉 CookieSyncManager 在 WebViewClient 中同步 onPageFinished。这应该能让你得到你想要的。

The CookieSyncManager 文档 http://developer.android.com/reference/android/webkit/CookieSyncManager.html关于如何正确执行此操作，这是一本很好的读物。

您可以通过以下方式设置 WebViewClient 实现来为您执行此操作：

webview.setWebViewClient(new WebViewClient() {
    public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) {
        //Users will be notified in case there's an error (i.e. no internet connection)
        Toast.makeText(activity, "Oh no! " + description, Toast.LENGTH_SHORT).show();
    }

    public void onPageFinished(WebView view, String url) {
        CookieSyncManager.getInstance().sync();
    }
);

您不需要告诉 CookieSyncManager 在其他地方进行同步。我还没有测试过这个，所以请告诉我它是否有效。