[英]Wait few seconds after onPageFinished
我開發了一個 Webview 應用程序。 加載 WebView 時,會顯示作為“進度條”的啟動畫面。 但我只看到啟動畫面 1 秒,因為成功加載 webview 后啟動畫面被隱藏。 加載速度非常快,但我想看到啟動畫面 3 秒。 如何以顯示啟動畫面至少 3 秒的方式實現它?
主要活動:
public class MainActivity extends AppCompatActivity {
String ShowOrHideWebViewInitialUse = "show";
private WebView webview ;
private ImageView spinner;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getDelegate().setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_NO);
setContentView(R.layout.activity_main);
webview =(WebView)findViewById(R.id.webView);
spinner = (ImageView)findViewById(R.id.logo_id3);
webview.setWebViewClient(new CustomWebViewClient());
webview.getSettings().setJavaScriptEnabled(true);
webview.getSettings().setDomStorageEnabled(true);
webview.setOverScrollMode(WebView.OVER_SCROLL_NEVER);
webview.loadUrl("xxxxxxxxxx");
}
boolean doubleBackToExitPressedOnce = false;
@Override
public void onBackPressed() {
if (webview.canGoBack()){
webview.goBack();
Toast.makeText( this, "Going back inside a WebView", Toast.LENGTH_SHORT).show();
}else {
this.doubleBackToExitPressedOnce = true;
Toast.makeText(this, "Doppelt zurück um zu beenden", Toast.LENGTH_SHORT).show();
}
if (doubleBackToExitPressedOnce) {
super.onBackPressed();
return;
}
new Handler(Looper.getMainLooper()).postDelayed(new Runnable() {
@Override
public void run() {
// Your Code
doubleBackToExitPressedOnce=false;
}
}, 2000);
}
// This allows for a splash screen
// (and hide elements once the page loads)
private class CustomWebViewClient extends WebViewClient {
@Override
public void onPageStarted(WebView webview, String url, Bitmap favicon) {
// only make it invisible the FIRST time the app is run
if (ShowOrHideWebViewInitialUse.equals("show")) {
webview.setVisibility(webview.INVISIBLE);
}
}
@Override
public void onPageFinished(WebView view, String url) {
ShowOrHideWebViewInitialUse = "hide";
spinner.setVisibility(View.GONE);
view.setVisibility(webview.VISIBLE);
super.onPageFinished(view, url);
}
}
}
mWebView.setWebViewClient(new WebViewClient() {
public void onPageFinished(WebView view, String url) {
// Hide the splash here
}
});
在您的情況下,您可以通過以下方式延遲您的代碼:
public void onPageFinished(WebView view, String url) {
Thread.sleep(2000);
ShowOrHideWebViewInitialUse = "hide";
spinner.setVisibility(View.GONE);
view.setVisibility(webview.VISIBLE);
super.onPageFinished(view, url);
}
2000
的單位是毫秒。 所以這將暫停線程2秒然后繼續
或者像這樣使用處理程序 class :
public void onPageFinished(WebView view, String url) {
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
ShowOrHideWebViewInitialUse = "hide";
spinner.setVisibility(View.GONE);
view.setVisibility(webview.VISIBLE);
super.onPageFinished(view, url);
}
}, 2000);
}
您可以使用帶有postDelayed
的處理程序
這里postDelayed
中的代碼將在調用onPageFinished
3 秒后執行
@Override
public void onPageFinished(WebView view, String url) {
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
ShowOrHideWebViewInitialUse = "hide";
spinner.setVisibility(View.GONE);
view.setVisibility(webview.VISIBLE);
super.onPageFinished(view, url);
}
}, 3000); // 3 seconds (3000 millisec)
}
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