APIDemo动画合集

/*
* Copyright (C) 2009 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
*      http://www.apache.org/licenses/LICENSE-2.0 *
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/

package com.example.android.apis.view;

// Need the following import to get access to the app resources, since this
// class is in a sub-package.
import com.example.android.apis.R;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.animation.AnimationUtils;
import android.view.animation.Animation;
import android.view.animation.TranslateAnimation;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Spinner;

public class Animation3 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.animation_3);

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 a = new TranslateAnimation(0.0f,
targetParent.getWidth() - target.getWidth() - targetParent.getPaddingLeft() -
targetParent.getPaddingRight(), 0.0f, 0.0f);
a.setDuration(1000);
a.setStartOffset(300);
a.setRepeatMode(Animation.RESTART);
a.setRepeatCount(Animation.INFINITE);

switch (position) {
case 0:
a.setInterpolator(AnimationUtils.loadInterpolator(this,
android.R.anim.accelerate_interpolator));
break;
case 1:
a.setInterpolator(AnimationUtils.loadInterpolator(this,
android.R.anim.decelerate_interpolator));
break;
case 2:
a.setInterpolator(AnimationUtils.loadInterpolator(this,
android.R.anim.accelerate_decelerate_interpolator));
break;
case 3:
a.setInterpolator(AnimationUtils.loadInterpolator(this,
android.R.anim.anticipate_interpolator));
break;
case 4:
a.setInterpolator(AnimationUtils.loadInterpolator(this,
android.R.anim.overshoot_interpolator));
break;
case 5:
a.setInterpolator(AnimationUtils.loadInterpolator(this,
android.R.anim.anticipate_overshoot_interpolator));
break;
case 6:
a.setInterpolator(AnimationUtils.loadInterpolator(this,
android.R.anim.bounce_interpolator));
break;
}

target.startAnimation(a);
}

public void onNothingSelected(AdapterView<?> parent) {
}
}