Webview有时会显示网页不可用

Question

On all of my apps I am getting a "webpage not available" error. This has just been happening recently, even on apps that have not been updated in awhile. At first I thought it was my server or domain name. However, everything loads on a mobile browser or desktop browser. The strangest part is that I can click on the link for the website given by the error and it works. Also, this isn't every time I get into the app. It sometimes load without any problems at all.

This is my main activity:

public class MainActivity extends Activity { private WebView mWebView;

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

    // Allow third party cookies for Android Lollipop
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
        mWebView = (WebView) findViewById(R.id.activity_main_webview);
        CookieManager cookieManager = CookieManager.getInstance();
        cookieManager.setAcceptThirdPartyCookies(mWebView,true);
    }

    mWebView = (WebView) findViewById(R.id.activity_main_webview);





    mWebView.getSettings().setJavaScriptCanOpenWindowsAutomatically(true);
    mWebView.getSettings().setAppCacheEnabled(true);
    mWebView.getSettings().setDatabaseEnabled(true);
    mWebView.getSettings().setDomStorageEnabled(true);
    mWebView.loadUrl("http://www.google.com");
}


@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
    if ((keyCode == KeyEvent.KEYCODE_BACK) && this.mWebView.canGoBack()) {
        this.mWebView.goBack();
        return true;
    }

    return super.onKeyDown(keyCode, event);
}

}

Answer 1

You instantiated WebView twice that could be the reason.

cookieManager.setAcceptThirdPartyCookies(mWebView,true);

You don't need this one below, you've done it already.

mWebView = (WebView)findViewById(R.id.activity_main_webview);