java - SwipeRefreshLayout 与 Webview 不工作

Question

这是我的带有 SwipeRefreshLayout 的 webview 应用程序代码。但是 SwipeRefresh 不工作请检查它。但所有其他事情都正常工作。像 webview，菜单按钮。

下面是我的activity_main.xml文件

 <?xml version="1.0" encoding="utf-8"?>
<RelativeLayout>

    <android.support.v4.widget.SwipeRefreshLayout
        android:id="@+id/swipe"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

    <WebView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_centerHorizontal="true"
        android:id="@+id/webView"
        />
    </android.support.v4.widget.SwipeRefreshLayout>
</RelativeLayout>

这是我的 MainActivity.java 文件

    public class MainActivity extends AppCompatActivity {

    WebView webView;
    SwipeRefreshLayout swipe;

    @Override
    public boolean onCreateOptionsMenu (Menu manu){
        getMenuInflater().inflate(R.menu.main, manu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected (MenuItem item){
        int id=item.getItemId();
        if(id==R.id.id_about){
            Intent intentabout=new Intent(MainActivity.this, About.class);
            startActivity(intentabout);

            return true;
        }
        if(id==R.id.id_terms){

            return true;
        }
        if(id==R.id.id_privacy){

            return true;
        }
        return true;
    }


    @Override
    public void onBackPressed() {
        if(webView.canGoBack()) {
            webView.goBack();
        } else {
            super.onBackPressed();
        }

    }

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

        swipe = (SwipeRefreshLayout) findViewById(R.id.swipe);
        swipe.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
            @Override
            public void onRefresh() {
                LoadWeb();
            }
        });

        LoadWeb();

    }

    public void LoadWeb(){
        webView = (WebView) findViewById(R.id.webView);
        WebSettings webSettings = webView.getSettings();
        webSettings.setJavaScriptEnabled(true);
        webSettings.setRenderPriority(WebSettings.RenderPriority.HIGH);
        webSettings.setCacheMode(WebSettings.LOAD_NO_CACHE);
        webSettings.setDomStorageEnabled(true);
        webSettings.setAppCacheEnabled(true);
        webView.loadUrl("https://google.com");
        swipe.setRefreshing(true);
        webView.setWebViewClient(new WebViewClient() {
            public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) {
                webView.loadUrl("file:///android_asset/error.html");

            }

            public void onPagefinished(WebView view, String url){
                swipe.setRefreshing(false);
            }
        });
    }

}

Answer 1

你必须将你的 WebView 放在 SwipeRefreshLayout 中:

public class MainActivity extends AppCompatActivity {

    WebView webView;
    SwipeRefreshLayout swipeRefreshLayout;
    String currentUrl = "https://www.google.co.in/";

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

        webView = (WebView) findViewById(R.id.webView);
        swipeRefreshLayout = (SwipeRefreshLayout) findViewById(R.id.swipeRefreshLayout);

        webView.loadUrl(currentUrl);
        webView.setWebViewClient(new MyWebViewClient());

        swipeRefreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
            @Override
            public void onRefresh() {
                webView.loadUrl(currentUrl);
            }
        });
    }

    public class MyWebViewClient extends WebViewClient{

        @Override
        public void onPageFinished(WebView view, String url) {
            swipeRefreshLayout.setRefreshing(false);
            currentUrl = url;
            super.onPageFinished(view, url);
        }
    }
}

swipeRefreshLayout.setRefreshing(false) 停止动画。