andoird闪屏
当然网上也有很多很好的例子.
那我就拿两种方式的闪屏来做效果,希望大家喜欢
1.首先讲个简单版的闪屏效果,主要为淡入淡出的效果
首先在res下创建文件夹anim,然后依次创建这2个文件
alpha_out.xml
<?xml version="1.0" encoding="utf-8"?> <set xmlns:android="http://schemas.android.com/apk/res/android"> <alpha android:fromAlpha="0.0" 动画起始时透明度; android:toAlpha="1.0" 动画结束时透明度 android:duration="1000" /> 动画持续使劲 </set>
alpha_in.xml
<set xmlns:android="http://schemas.android.com/apk/res/android"> <alpha android:fromAlpha="1.0" android:toAlpha="0.0" android:duration="1000" /> </set>
一进一出就形成了淡入淡出效果了,希望大家能想明白这个地方.
/**
* 闪屏启动
*
* @author Bert Guo 2013-3-1
*/
public class AppStart extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
LinearLayout linear = new LinearLayout(AppStart.this);
linear.setLayoutParams(new LinearLayout.LayoutParams(
LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));
linear.setBackgroundDrawable(getResources().getDrawable(R.drawable.b1));
setContentView(linear);
new CountDownTimer(2000, 1000) { // 倒计时启动界面效果
// 2000->从开始调用start()到倒计时完成并onFinish()方法被调用的毫秒数
// 1000->接收onTick(long)回调的间隔时间
@Override
public void onTick(long millisUntilFinished) {
}
@Override
public void onFinish() {
redirectTo();
}
}.start();
}
/**
* 跳转到主界面
*/
private void redirectTo() {
UIHelper.Go(AppStart.this, MainActivity.class); // 跳转到MainActivity界面
int VERSION = Integer.parseInt(android.os.Build.VERSION.SDK);
if (VERSION >= 5) { // 版本>=5
// 在startActivity后,加入overridePendingTransition实现淡入淡出效果
// 第一个activity退出时的动画,第二个activity进入时的动画
AppStart.this.overridePendingTransition(R.anim.alpha_out,
R.anim.alpha_in);
}
finish(); // 销毁当前Activity
}
}
start.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:gravity="bottom"
android:background="@drawable/b1">
</LinearLayout>
<activity
android:name=".AppStart"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
MainActivity为一个普通界面就行..这是普通的,然后下面再讲一个动画效果的闪屏
提供点核心代码.
2.下面这个基本没见人去这么使用过,动画效果闪屏.
flg.xml
<?xml version="1.0" encoding="utf-8"?>
<animation-list
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/flaganim"
android:oneshot="false"
>
<item android:drawable="@drawable/f03" android:duration="100" />
<item android:drawable="@drawable/f04" android:duration="100" />
<item android:drawable="@drawable/f05" android:duration="100" />
<item android:drawable="@drawable/f06" android:duration="100" />
<item android:drawable="@drawable/f07" android:duration="100" />
<item android:drawable="@drawable/f08" android:duration="100" />
<item android:drawable="@drawable/f09" android:duration="100" />
<item android:drawable="@drawable/f10" android:duration="100" />
</animation-list>
splash.xml
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/TheSplashLayout" android:layout_gravity="center" > <ImageView android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/SplashImageView" android:layout_gravity="center" > </ImageView> <!-- Not animated <ImageView android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/SplashImageView" android:src="@drawable/lnxins" android:layout_gravity="center" > </ImageView> --> </LinearLayout>
appear.xml
<?xml version="1.0" encoding="utf-8"?> <set xmlns:android="http://schemas.android.com/apk/res/android"> <alpha android:interpolator="@android:anim/accelerate_interpolator" android:fromAlpha="0.0" android:toAlpha="1.0" android:duration="800" /> </set>
disappear.xml
<?xml version="1.0" encoding="utf-8"?> <set xmlns:android="http://schemas.android.com/apk/res/android"> <alpha android:interpolator="@android:anim/decelerate_interpolator" android:fromAlpha="1.0" android:toAlpha="0.0" android:duration="800" /> </set>
SplashScreen
public class SplashScreen extends Activity {
/**
* The thread to process splash screen events
*/
private Thread mSplashThread;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Splash screen view
setContentView(R.layout.splash);
// Start animating the image
final ImageView splashImageView = (ImageView) findViewById(R.id.SplashImageView);
splashImageView.setBackgroundResource(R.drawable.flag);
final AnimationDrawable frameAnimation = (AnimationDrawable)splashImageView.getBackground();
splashImageView.post(new Runnable(){
@Override
public void run() {
frameAnimation.start();
}
});
final SplashScreen sPlashScreen = this;
// The thread to wait for splash screen events
mSplashThread = new Thread(){
@Override
public void run(){
try {
synchronized(this){
// Wait given period of time or exit on touch
wait(5000);
}
}
catch(InterruptedException ex){
}
finish();
// Run next activity
Intent intent = new Intent();
intent.setClass(sPlashScreen, MainActivity.class);
startActivity(intent);
stop();
}
};
mSplashThread.start();
}
}