activity启动动画

从OverrideDemoActivity跳转到ActivityA。
OverrideDemoActivity：

package com.practice.override;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class OverrideDemoActivity extends Activity {

Button button;

    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
       
        button = (Button)findViewById(R.id.button);
        button.setOnClickListener(new OnClickListener() {

public void onClick(View v) {
Intent intent = new Intent(OverrideDemoActivity.this,ActivityA.class);
startActivity(intent);

/*
* 第一个参数是指启动的Activity的动画方式，第二个参数是finish的Activity的动画方式
* 这里启动的是ActivityA，所以就是ActivityB以R.anim.demo_scale这个动画方式启动
* 而OverrideDemoActivity这个则以R.anim.demo_rotate动画finish
*/
overridePendingTransition(R.anim.demo_scale, R.anim.demo_translate);
}
       
        });
    }
}
ActityA：
package com.practice.override;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class ActivityA extends Activity{

Button button;

    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        button = (Button)findViewById(R.id.button);
        button.setOnClickListener(new OnClickListener() {

public void onClick(View v) {
finish();
overridePendingTransition(R.anim.demo_scale, R.anim.demo_translate);
}
        });
    }

}

在res目录下面新建anim目录，然后新建demo_scale.xml：
<?xml version="1.0" encoding="utf-8"?>
<set android:shareInterpolator="false"
xmlns:android="http://schemas.android.com/apk/res/android">
 
      <scale
        android:fromXScale="0"
        android:toXScale="1.0"
        android:fromYScale="0"
        android:toYScale="1.0"
        android:pivotX="50%"
        android:pivotY="50%"
        android:duration="3000"
      />

</set>
接着再建立一个xml文件demo_translate.xml:
<?xml version="1.0" encoding="utf-8"?>
<set android:shareInterpolator="false"
xmlns:android="http://schemas.android.com/apk/res/android">

      <translate
      android:fromXDelta="0"
      android:toXDelta="150"
      android:fromYDelta="0"
      android:toYDelta="150"
      android:duration="3000"
      />
     
</set>