Question

navigation open我构建了在网络视图中打开不同网站的Android应用程序，但是当我打开沃尔玛网站时，我在网站导航栏上遇到问题，当我向下滚动我的网站导航栏时，它不会在顶部显示它＃s; s perfrom刷卡刷新。 Scroll for going on top of navigation top but not scroll going swipe to refresh

我的xml文件是： -

`<android.support.v4.widget.SwipeRefreshLayout
    android:id="@+id/swipeContainer"
    android:layout_width="match_parent"
    android:layout_below="@+id/progressBar"
    android:layout_height= "match_parent">


    <WebView
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:id="@+id/webView1"
        android:layout_width="match_parent"
        android:layout_height="match_parent"/>
</android.support.v4.widget.SwipeRefreshLayout>`

我的java代码是： -

public class MainActivity extends AppCompatActivity {
private WebView myWebView;
Context context;
Toolbar toolbar;
ProgressBar progressBar;
SwipeRefreshLayout mySwipeRefreshLayout;
WebSettings settings;

RelativeLayout relativeLayout;

@SuppressLint("SetJavaScriptEnabled")
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    myWebView = (WebView) findViewById(R.id.webView1);
    myWebView.setWebViewClient(new WebViewClientDemo());
    myWebView.setWebChromeClient(new WebChromeClientDemo());
    myWebView.getSettings().setJavaScriptEnabled(true);
    myWebView.loadUrl("https://www.walmart.com/");
    myWebView.getSettings().setDomStorageEnabled(true);
    mySwipeRefreshLayout = (SwipeRefreshLayout)findViewById(R.id.swipeContainer);

    mySwipeRefreshLayout.setOnRefreshListener(
            new SwipeRefreshLayout.OnRefreshListener() {
                @Override
                public void onRefresh() {
                    myWebView.reload();
                }
            }
    );

    mySwipeRefreshLayout.setNestedScrollingEnabled(false);

抱歉英语不好提前谢谢你。

Answer 1

步骤1：你必须看到滚动位置，如果它被完全向下滑动，即当y位置为零时刷新。

第2步：您可以使用canChileScrollUp()方法

来完成此操作

这是一个自定义的refreshlayout，它有一个函数“canChildScrollUp”检测天气是否刷新，如果返回false则不会刷新。

“canSwipeRefreshChildScrollUp”是您将在活动中编写逻辑的地方。在你的情况下使用自定义webview并检测滚动位置，如果滚动完成，则只返回true

public class CustomSwipeRefreshLayout extends SwipeRefreshLayout {

private CanChildScrollUpCallback mCanChildScrollUpCallback;

public interface CanChildScrollUpCallback {
    boolean canSwipeRefreshChildScrollUp();
}

public void setCanChildScrollUpCallback(CanChildScrollUpCallback canChildScrollUpCallback) {
    mCanChildScrollUpCallback = canChildScrollUpCallback;
}

@Override
public boolean canChildScrollUp() {
    if (mCanChildScrollUpCallback != null) {
        return mCanChildScrollUpCallback.canSwipeRefreshChildScrollUp();
    }
    return super.canChildScrollUp();
}
}

在您的活动中

public class YourActivity implements CustomSwipeRefreshLayout.CanChildScrollUpCallback {

private CustomSwipeRefreshLayout mRefreshLayout;
private WebView mWebView;

@Override
protected void onCreate(Bundle savedInstanceState) {
    // after initialization
    mRefreshLayout.setCanChildScrollUpCallback(this);
}

@Override
public boolean canSwipeRefreshChildScrollUp() {
    return mWebview.getScrollY() > 0;
}
}

要检测嵌套滚动，您可以使用此

public class MyWebView extends WebView{
@Override
protected void onOverScrolled(int scrollX, int scrollY, boolean clampedX, boolean clampedY) {
    if(clampedX || clampedY){
        //Content is not scrolling
        //TODO Enable SwipeRefreshLayout
    }
}
@Override
public boolean onTouchEvent(MotionEvent event) {
    if(event.getActionMasked()==MotionEvent.ACTION_UP){
         //TODO Disable SwipeRefreshLayout
    }
}
}

android Web视图滑动在网站导航栏中刷新向下滚动问题

1 个答案: