Activity 页面切换的效果

package?com.example.androidui;

import?android.app.Activity;
import?android.content.Intent;
import?android.os.Bundle;
import?android.os.Handler;
import?android.view.Menu;

public?class?MainActivity?extends?Activity?{

	@Override
	protected?void?onCreate(Bundle?savedInstanceState)?{
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		new?Handler().postDelayed(new?Runnable()?{

			@Override
			public?void?run()?{
				Intent?mainIntent?=?new?Intent(MainActivity.this,OtherActivity.class);
				MainActivity.this.startActivity(mainIntent);
				MainActivity.this.finish();
				overridePendingTransition(R.anim.myenteranim,?R.anim.myexitanim);
			}
		},?3000);
	}

	@Override
	public?boolean?onCreateOptionsMenu(Menu?menu)?{
		//?Inflate?the?menu;?this?adds?items?to?the?action?bar?if?it?is?present.
		getMenuInflater().inflate(R.menu.main,?menu);
		return?true;
	}

}

<?xml?version="1.0"?encoding="utf-8"?>
<set?xmlns:android="http://schemas.android.com/apk/res/android"
????android:interpolator="@android:anim/decelerate_interpolator"?>

????<!--?渐变尺寸伸缩动画效果?-->
????<scale
????????android:duration="@android:integer/config_mediumAnimTime"
????????android:fromXScale="2.0"
????????android:fromYScale="2.0"
????????android:pivotX="50%p"
????????android:pivotY="50%p"
????????android:toXScale="1.0"
????????android:toYScale="1.0"?/>

</set>

<?xml?version="1.0"?encoding="utf-8"?>
<set?xmlns:android="http://schemas.android.com/apk/res/android"
????android:interpolator="@android:anim/decelerate_interpolator"
????android:zAdjustment="top"?>

????<alpha
????????android:duration="@android:integer/config_mediumAnimTime"
????????android:fromAlpha="1.0"
????????android:toAlpha="0"?/>

????<scale
????????android:duration="@android:integer/config_mediumAnimTime"
????????android:fromXScale="1.0"
????????android:fromYScale="1.0"
????????android:pivotX="50%p"
????????android:pivotY="50%p"
????????android:toXScale=".5"
????????android:toYScale=".5"?/>

</set>