如何將SwipeRefreshLayout添加到WebView

Question

我需要從頂部拉動以刷新我的Web視圖，該視圖是在Android Developer網站上找到的，但我不知道如何使用它

xml代碼

<android.support.v4.widget.SwipeRefreshLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/swiperefresh"
android:layout_width="match_parent"
android:layout_height="match_parent">

<ListView
    android:id="@android:id/list"
    android:layout_width="match_parent"
    android:layout_height="match_parent" />

Java代碼

mySwipeRefreshLayout.setOnRefreshListener(
new SwipeRefreshLayout.OnRefreshListener() {
    @Override
    public void onRefresh() {
        Log.i(LOG_TAG, "onRefresh called from SwipeRefreshLayout");

        // This method performs the actual data-refresh operation.
        // The method calls setRefreshing(false) when it's finished.
        myUpdateOperation();
    }
}

）;

Answer 1

您必須將WebView放入SwipeRefreshLayout中：

public class MainActivity extends AppCompatActivity {

    WebView webView;
    SwipeRefreshLayout swipeRefreshLayout;
    String currentUrl = "https://news.ycombinator.com/";

    @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)停止動畫。

Answer 2

為了能夠使用相同的URL刷新頁面

1. 您必須在頁面首次加載時將鏈接保存在ISharedPreferences中

    public override void OnPageFinished(WebView view, string url) { ISharedPreferences prefs = PreferenceManager.GetDefaultSharedPreferences(this); ISharedPreferencesEditor editor = prefs.Edit(); editor.PutString("MyURL", url); editor.Commit(); } 

2. 當您加載URL刷新時，請使用保存的URL

    string SaveURL = prefs.GetString("MyURL", ""); webView.loadUrl(SaveURL); 

   -其他解決方案是Webview.Reload(); //此代碼刷新當前加載的頁面