TextView中各种Interpolator的使用

Java代码 
package net.blogjava.mobile.interpolators;  
 
import android.app.Activity;  
import android.os.Bundle;  
import android.view.View;  
import android.view.animation.Animation;  
import android.view.animation.AnimationUtils;  
import android.view.animation.TranslateAnimation;  
import android.widget.AdapterView;  
import android.widget.ArrayAdapter;  
import android.widget.Spinner;  
 
public class Main extends Activity implements 
        AdapterView.OnItemSelectedListener {  
    private static final String[] INTERPOLATORS = { "Accelerate", "Decelerate",  
            "Accelerate/Decelerate", "Anticipate", "Overshoot",  
            "Anticipate/Overshoot", "Bounce" };  
 
    @Override 
    public void onCreate(Bundle savedInstanceState) {  
 
        super.onCreate(savedInstanceState);  
        setContentView(R.layout.main);  
 
        Spinner s = (Spinner) findViewById(R.id.spinner);  
        ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,  
                android.R.layout.simple_spinner_item, INTERPOLATORS);  
        adapter  
                .setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);  
        s.setAdapter(adapter);  
        s.setOnItemSelectedListener(this);  
    }  
 
    public void onItemSelected(AdapterView parent, View v, int position, long id) {  
        final View target = findViewById(R.id.target);  
        final View targetParent = (View) target.getParent();  
        Animation animation = new TranslateAnimation(0.0f, targetParent  
                .getWidth()  
                - target.getWidth()  
                - targetParent.getPaddingLeft()  
                - targetParent.getPaddingRight(), 0.0f, 0.0f);  
        animation.setDuration(1000);  
        animation.setStartOffset(300);  
        animation.setRepeatMode(Animation.RESTART);  
        animation.setRepeatCount(Animation.INFINITE);  
 
        switch (position) {  
        case 0:  
            animation.setInterpolator(AnimationUtils.loadInterpolator(this,  
                    android.R.anim.accelerate_interpolator));  
            break;  
        case 1:  
            animation.setInterpolator(AnimationUtils.loadInterpolator(this,  
                    android.R.anim.decelerate_interpolator));  
            break;  
        case 2:  
            animation.setInterpolator(AnimationUtils.loadInterpolator(this,  
                    android.R.anim.accelerate_decelerate_interpolator));  
            break;  
        case 3:  
            animation.setInterpolator(AnimationUtils.loadInterpolator(this,  
                    android.R.anim.anticipate_interpolator));  
            break;  
        case 4:  
            animation.setInterpolator(AnimationUtils.loadInterpolator(this,  
                    android.R.anim.overshoot_interpolator));  
            break;  
        case 5:  
            animation.setInterpolator(AnimationUtils.loadInterpolator(this,  
                    android.R.anim.anticipate_overshoot_interpolator));  
            break;  
        case 6:  
            animation.setInterpolator(AnimationUtils.loadInterpolator(this,  
                    android.R.anim.bounce_interpolator));  
            break;  
        }  
 
        target.startAnimation(animation);  
    }  
 
    public void onNothingSelected(AdapterView parent) {  
    }  
}