如何在Android上显示启动屏幕3秒钟? [英] How to show a splash screen for 3 seconds on Android?
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问题描述
我希望启动图像开始并停留3秒钟,然后消失并继续,或者替换为main.xml中的其余布局.
I would like the splash image to begin and stay for 3 seconds, and then disappear and continue or be replaced with the rest of the layout in the main.xml.
这是我的代码:
Main.java
Main.java
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.main);
ImageView splash = (ImageView) this.findViewById(R.id.splash);
main.xml
<?xml version="1.0" encoding="utf-8"?>
<!-- margin=0px, padding=20px -->
<!--textview padding=10dp, textSize=16sp-->
<!--px=pixel, dp=density indepen sp=scale indepen fontsize preference -->
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<ImageView
android:id="@+id/splash"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:src="@drawable/splash2"/>
<ImageView
android:id="@+id/myImageView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/bg_main"/>
<ImageView
android:id="@+id/myImageView0"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/bar_top"/>
<!--
<TextView android:id="@+id/textItem"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:paddingTop="10dp"
android:paddingLeft="110dp"
android:background="#00000000"
android:textColor="#ffffffff"
android:textSize="22sp"
android:text="Find Car"
android:enabled="false"
>
-->
<TabHost android:id="@android:id/tabhost"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<RelativeLayout
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:padding="3dp">
<FrameLayout
android:id="@android:id/tabcontent"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="1" />
<TabWidget
android:id="@android:id/tabs"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignBottom = "@android:id/tabcontent"
/>
</RelativeLayout>
</TabHost>
</RelativeLayout>
推荐答案
您可以这样做
ImageView splash = (ImageView) this.findViewById(R.id.splash);
splash.postDelayed(new Runnable(){
splash.setVisibility(View.GONE);
}, 3000);
或者通过调用此方法(从Android文档中)来添加动画,而不是直接将可见性设置为GONE
Or maybe add an animation by invoking this method (from the Android docs) instead of setting visibility to GONE directly
private void fadeSplashOut() {
// Set the content view to 0% opacity but visible, so that it is visible
// (but fully transparent) during the animation.
mContentView.setAlpha(0f);
mContentView.setVisibility(View.VISIBLE);
// Animate the content view to 100% opacity, and clear any animation
// listener set on the view.
mContentView.animate()
.alpha(1f)
.setDuration(mShortAnimationDuration)
.setListener(null);
// Animate the loading view to 0% opacity. After the animation ends,
// set its visibility to GONE as an optimization step (it won't
// participate in layout passes, etc.)
splash.animate()
.alpha(0f)
.setDuration(mShortAnimationDuration)
.setListener(new AnimatorListenerAdapter() {
@Override
public void onAnimationEnd(Animator animation) {
splash.setVisibility(View.GONE);
}
});
}
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