我有这个应用程序,它开始显示一个3秒的启动画面,然后调用另一个活动,这是一个webview。
CODE SPLASHSCREEN
package test.test;
import test.test.R;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.MotionEvent;
public class SplashScreen extends Activity {
int timer = 0;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_splash_screen);
Thread splashThread = new Thread() {
@Override
public void run() {
try {
while (timer < 3000) {
sleep(100);
timer += 100;
}
} catch (InterruptedException e) {
// do nothing
} finally {
finish();
Intent i = new Intent();
i.setClassName("test.test","test.test.Mainmenu");
startActivity(i);
}
}
};
splashThread.start();
}
}
CODE XML SPLASH
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:animateLayoutChanges="false"
android:background="#57a11f" >
<ImageView
android:id="@+id/ImageView01"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:contentDescription="@string/image"
android:src="@drawable/splash" />
</RelativeLayout>
CODE WEBVIEW
package test.test;
import test.test.R;
import android.app.Activity;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.os.Bundle;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
public class Mainmenu extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
overridePendingTransition(android.R.anim.fade_in, android.R.anim.fade_out);
setContentView(R.layout.activity_mainmenu);
WebView webView = (WebView) findViewById(R.id.webview);
webView.getSettings().setAppCacheMaxSize( 10 * 1024 * 1024 );
webView.getSettings().setAppCachePath( getApplicationContext().getCacheDir().getAbsolutePath()+ "/cache" );
webView.getSettings().setAllowFileAccess( true );
webView.getSettings().setAppCacheEnabled( true );
webView.setBackgroundColor(0x00000000);
webView.setWebViewClient(new WebViewClient());
webView.getSettings().setJavaScriptEnabled( true );
webView.getSettings().setDomStorageEnabled( true );
webView.getSettings().setCacheMode( WebSettings.LOAD_DEFAULT );
if ( !isNetworkAvailable() ) {
webView.getSettings().setCacheMode( WebSettings.LOAD_CACHE_ELSE_NETWORK );
}
webView.loadUrl( "http://www.google.com" );
}
private boolean isNetworkAvailable() {
ConnectivityManager connectivityManager = (ConnectivityManager) getSystemService( CONNECTIVITY_SERVICE );
NetworkInfo activeNetworkInfo = connectivityManager.getActiveNetworkInfo();
return activeNetworkInfo != null;
}
}
CODE WEBVIEW XML
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#57a11f"
tools:context=".Mainmenu" >
<WebView
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/webview"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:animateLayoutChanges="false"
/>
</RelativeLayout>
问题:当splashscreen调用webview活动时,它会留下一段时间的空白屏幕,下载和呈现页面的时间。
我想说的是:我想知道如何同时启动启动画面和webview,但隐藏webview,以便在后台加载和渲染页面有3秒钟。< / p>
EXTRA:我不是在寻找使用onPageFinished的解决方案,因为我真的希望启动画面保持3秒钟而且使用onPageFinished顺便说一下并不能避免将网页放到屏幕上所需的渲染时间。
谢谢!
答案 0 :(得分:3)
在同一布局文件中使用ImageView和WebView 最初将webview保持在View.Gone模式中。
一旦spalsh屏幕完成,启用WebView View.Viasible和ImageView View.Gone
Pseudocode :
Webview=View.Gone;
ImageView=View.VISIBLE;
WebView.loadURL="<some url>";
SplasScreen timer for 3 seconds;
WebView=View.VISIBLE;
ImageVIew=View.GONE;
使用RelativeLayout或FrameLayout