how to remove cache from webView

问题

I have recyclerView and in each items I've have displaced facebook in webView. I loged in one of the item (position 1) of the webview by facebook. And, all other items (position 1,2,3..) are automatically logged in same fb account. But, I want to login different fb account in different item.

this is my activity:

 @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main2);

        webView = findViewById(R.id.webView);
        webView.setWebViewClient(new WebViewClient());
        webView.getSettings().setJavaScriptEnabled(true);
        webView.getSettings().setSavePassword(true);

        code = getIntent().getStringExtra(MainActivity.FB);

        assert code != null;
        switch (code) {
            case "fb1":
                webView.loadUrl("https://www.facebook.com");
                break;
            case "fb2":
                webView.clearCache(true);
                webView.loadUrl("https://www.facebook.com");
                break;
            case "fb3":
                webView.loadUrl("https://www.facebook.com");
                break;
        }
    }

I tried to add webView.clearCache(true); in one but, It is also not working. Once different facebook is logged in different items, I don't want user to enter login details again. Can you please help me?

I don't want to clear cache, but I want to disconnect the link between webview of different list. I mean, if I login one user in one webview, all webview are showing same user. And, if I use clear cache user must enter login details again and again.

回答1:

You can try this way. Hope it should work.

CookieManager cookieManager = CookieManager.getInstance();

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
       cookieManager.removeAllCookies(new ValueCallback<Boolean>() {
      
         @Override
         public void onReceiveValue(Boolean aBoolean) {
               Log.d(TAG, "Cookie removed: " + aBoolean);
         }
       });
}
else {
cookieManager.removeAllCookie()
}
webView.clearCache(true);
webView.clearFormData();
webView.clearHistory();

来源：https://stackoverflow.com/questions/62526644/how-to-remove-cache-from-webview