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android 渐变展示启动屏

   启动界面Splash Screen在应用程序是很常用的,往往在启动界面中显示产品Logo、公司Logo或者开发者信息,如果应用程序启动时间比较长,那么启动界面就是一个很好的东西,可以让用户耐心等待这段枯燥的时间。
         Android 应用程序创建一个启动界面Splash Screen非常简单。

布局文件:splash.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:background="@drawable/splash" --资源图片splash.jpg
    android:gravity="bottom"
    android:orientation="vertical" >

</LinearLayout>

Activity文件:(SplashActivity.java)

package lcl.android.activity;

import lcl.android.R;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.view.View;
import android.view.animation.AlphaAnimation;
import android.view.animation.Animation;
import android.view.animation.Animation.AnimationListener;

public class SplashActivity extends FragmentActivity {
    @Override
    protected void onCreate(Bundle arg0) {
        super.onCreate(arg0);
        final View view = View.inflate(this, R.layout.splash, null);
        setContentView(view);

        // 渐变展示启动屏
        AlphaAnimation aa = new AlphaAnimation(0.3f, 1.0f);
        aa.setDuration(2000);
        view.startAnimation(aa);
        aa.setAnimationListener(new AnimationListener() {
            @Override
            public void onAnimationEnd(Animation arg0) {
                redirectTo();
            }

            @Override
            public void onAnimationRepeat(Animation animation) {
            }

            @Override
            public void onAnimationStart(Animation animation) {
            }

        });
    }

    /**
     * 跳转到...
     */
    private void redirectTo() {
        Intent intent = new Intent(this, MainActivity.class);
        startActivity(intent);
        finish();
    }
}


AndroidManifest.xml

<activity
    android:name="lcl.android.activity.SplashActivity"
    android:screenOrientation="portrait"
    android:theme="@android:style/Theme.NoTitleBar.Fullscreen" >
    <intent-filter>
        <action android:name="android.intent.action.MAIN" />

        <category android:name="android.intent.category.LAUNCHER" />
    </intent-filter>
</activity>

运行效果:

image

posted @ 2014-07-21 23:57  峡谷少爷  阅读(360)  评论(0编辑  收藏  举报