Android 关于 Activity 之间的切换动画

最近刚好有人问题，android中 Activity 之间的切换动画怎么实现？
属性ApiDemo的朋友应该都知道，其实在android2.0中就已经可以很简单的实现Activity 之间的动画切换效果。
在startActivity 后调用 overridePendingTransition(int enterAnim,int exitAnim),就可以实现Activity之间的动画，
其中enterAnim 是下一个Activity的enter动画效果，exitAnim 是当前Actitvity退出的动画效果，
在anim的file中可以定义动画，就跟定义控件的动画一样，这里就不多种解释了，相信大家多控件的动画都比较熟悉了。

好现在开始贴下部分代码，以下是25个简单的Activity之间的切换效果。

Java代码

package com.asai.android.demo;import android.app.Activity;import android.content.Intent;import android.os.Bundle;import android.view.View;import android.widget.ArrayAdapter;import android.widget.Button;import android.widget.Spinner;public class demoMain extends Activity {        Button btnDemo;        Spinner sprAnim;        /** Called when the activity is first created. */        @Override        public void onCreate(Bundle savedInstanceState) {                super.onCreate(savedInstanceState);                setContentView(R.layout.main);                btnDemo = (Button) findViewById(R.id.btnDemo);                sprAnim = (Spinner) findViewById(R.id.sprAnim);                ArrayAdapter<?> animType = ArrayAdapter.createFromResource(this,                                R.array.anim_type, android.R.layout.simple_spinner_item);                animType                                .setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);                sprAnim.setAdapter(animType);                sprAnim.setSelection(0);                btnDemo.setOnClickListener(new View.OnClickListener() {                        public void onClick(View view) {                                startActivity(new Intent(demoMain.this, demoDetail.class));                                switch (sprAnim.getSelectedItemPosition()) {                                case 0:                                        overridePendingTransition(R.anim.zoom_enter,                                                        R.anim.zoom_exit);                                        break;                                case 1:                                        overridePendingTransition(R.anim.fade, R.anim.hold);                                        break;                                case 2:                                        overridePendingTransition(R.anim.alpha_rotate,R.anim.my_alpha_action);                                        break;                                case 3:                                        overridePendingTransition(R.anim.alpha_scale_rotate,R.anim.my_alpha_action);                                        break;                                case 4:                                        overridePendingTransition(R.anim.alpha_scale_translate_rotate,R.anim.my_alpha_action);                                        break;                                case 5:                                        overridePendingTransition(R.anim.alpha_scale_translate,R.anim.my_alpha_action);                                        break;                                case 6:                                        overridePendingTransition(R.anim.alpha_scale,R.anim.my_alpha_action);                                        break;                                case 7:                                        overridePendingTransition(R.anim.alpha_translate_rotate,R.anim.my_alpha_action);                                        break;                                case 8:                                        overridePendingTransition(R.anim.alpha_translate,R.anim.my_alpha_action);                                        break;                                case 9:                                        overridePendingTransition(R.anim.my_rotate_action,R.anim.my_alpha_action);                                        break;                                case 10:                                        overridePendingTransition(R.anim.my_scale_action,R.anim.my_alpha_action);                                        break;                                case 11:                                        overridePendingTransition(R.anim.my_translate_action,R.anim.my_alpha_action);                                        break;                                case 12:                                        overridePendingTransition(R.anim.myanimation_simple,R.anim.my_alpha_action);                                        break;                                case 13:                                        overridePendingTransition(R.anim.myown_design,R.anim.my_alpha_action);                                        break;                                case 14:                                        overridePendingTransition(R.anim.scale_rotate,R.anim.my_alpha_action);                                        break;                                case 15:                                        overridePendingTransition(R.anim.scale_translate_rotate,R.anim.my_alpha_action);                                        break;                                case 16:                                        overridePendingTransition(R.anim.scale_translate,R.anim.my_alpha_action);                                        break;                                case 17:                                        overridePendingTransition(R.anim.translate_rotate,R.anim.my_alpha_action);                                        break;                                case 18:                                        overridePendingTransition(R.anim.hyperspace_in,R.anim.hyperspace_out);                                        break;                                case 19:                                        overridePendingTransition(R.anim.shake,R.anim.my_alpha_action);                                        break;                                case 20:                                        overridePendingTransition(R.anim.push_left_in,R.anim.push_left_out);                                        break;                                case 21:                                        overridePendingTransition(R.anim.push_up_in,R.anim.push_up_out);                                        break;                                case 22:                                        overridePendingTransition(R.anim.slide_left,R.anim.slide_right);                                        break;                                case 23:                                        overridePendingTransition(R.anim.slide_top_to_bottom,R.anim.my_alpha_action);                                        break;                                case 24:                                        overridePendingTransition(R.anim.wave_scale,R.anim.my_alpha_action);                                        break;                        }                        }                });        }}