Question

我需要显示启动画面，直到在webview中加载网页。

我使用以下代码。有可能吗？

public class MainActivity extends Activity {

    private WebView view;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        requestWindowFeature(Window.FEATURE_NO_TITLE);

        setContentView(R.layout.activity_main);

        String url = "http://google.com";
        view = (WebView)this.findViewById(R.id.webView1);

        view.clearCache(true);
        WebSettings s = view.getSettings();
        s.setJavaScriptEnabled(true);

        s.setCacheMode(WebSettings.LOAD_DEFAULT);
        s.setDomStorageEnabled(true);

        view.loadUrl(url);
    }

和

def get(self):

    teststr ='/gs/staging.trn-test2.appspot.com/TestContainer/Barcos-2017-02-12-145657.jpg'
    img = images.Image(filename=teststr)

    img.resize(width=80, height=100)
    thumbnail = img.execute_transforms(output_encoding=images.JPEG)
    self.response.headers['Content-Type'] = 'image/jpeg'
    self.response.out.write(thumbnail)

Answer 1

不要为启动画面制作单独的活动，在MainActivity.java中创建启动画面布局和webview布局，并将webview的可见性设置为GONE。

打开MainActivity初始化webView并设置自定义WebViewClient。覆盖自定义webViewClient中的onPageFinished（），并在此方法中使webview可见并将屏幕布局设置为Gone。

同样在这里：Loading a WebView URL before splashscreen finishes

Answer 2

我的解决方案就在这里

private WebView view;
private ImageView splashScreen;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    requestWindowFeature(Window.FEATURE_NO_TITLE);

    setContentView(R.layout.activity_main);

    splashScreen =   (ImageView) this.findViewById(R.id.spscreen);

    String url = "http://google.com";
    view = (WebView)this.findViewById(R.id.webView1);

    view.setWebViewClient(new WebViewClient() {            

       public void onPageFinished(WebView view, String url) {
            // do your stuff here
            splashScreen.setVisibility(View.INVISIBLE);
            view.setVisibility(View.VISIBLE);
        }
    });

      WebSettings s = view.getSettings();
    s.setJavaScriptEnabled(true);

    s.setCacheMode(WebSettings.LOAD_DEFAULT);
    s.setDomStorageEnabled(true);

    view.loadUrl(url);
}

布局

<ImageView
    android:id="@+id/spscreen"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:layout_alignParentBottom="true"
    android:layout_alignParentRight="true"
    android:src="@drawable/splashscreen"
     android:visibility="visible"
    android:scaleType="fitXY"/>

<WebView
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:id="@+id/webView1"
    android:visibility="invisible" />

在网站加载完成启动画面

2 个答案: