Android 动画（三）－－属性动画

Android Developer URL:http://developer.android.com/guide/topics/graphics/prop-animation.html

详细细节请参考上文

1》布局文件activity_main.xml,代码如下（很简单只有一个按钮而已）：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/rootRelativeLayout"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <Button
        android:id="@+id/start_btn"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Start" />

</RelativeLayout>

2》动画更新的监听器

package com.demo.animationlistener;

import android.animation.ValueAnimator;
import android.animation.ValueAnimator.AnimatorUpdateListener;
import android.util.Log;
import android.view.View;

public class AnimatorUpdateListenerClass implements AnimatorUpdateListener {
	private View view;

	public AnimatorUpdateListenerClass() {
		// TODO Auto-generated constructor stub
	}

	public AnimatorUpdateListenerClass(View view) {
		// TODO Auto-generated constructor stub
		this.view = view;
	}

	@Override
	public void onAnimationUpdate(ValueAnimator animation) {
		// TODO Auto-generated method stub
		view.setTranslationY((Float) animation.getAnimatedValue());
		Log.i("CXC", "###onAnimationUpdate()--getAnimatedValue():"
				+ (Float) animation.getAnimatedValue());

	}

}

3》监听动画行为的监听器

package com.demo.animationlistener;

import android.animation.Animator;
import android.animation.Animator.AnimatorListener;
import android.animation.ObjectAnimator;
import android.animation.ValueAnimator;
import android.annotation.SuppressLint;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup;
import android.view.animation.Animation;
import android.view.animation.Animation.AnimationListener;

/**
 * 动画监听器类
 * */
@SuppressLint("NewApi")
public class AnimatorListenerClass implements AnimatorListener {
	private View view;

	public AnimatorListenerClass() {
		// TODO Auto-generated constructor stub
	}

	public AnimatorListenerClass(View view) {
		// TODO Auto-generated constructor stub
		this.view = view;
	}

	@Override
	public void onAnimationEnd(Animator animation) {
		// TODO Auto-generated method stub
		Log.i("CXC", "---onAnimationEnd+++++");
		// 得到该控件的父控件
		ViewGroup parentViewGroup = (ViewGroup) view.getParent();

		if (parentViewGroup != null) {
			// 从父控件中删除该控件
			parentViewGroup.removeView(view);
			Log.i("CXC", "----delete view from parent success ++++");
		}

	}

	@Override
	public void onAnimationCancel(Animator animation) {
		// TODO Auto-generated method stub

	}

	@Override
	public void onAnimationRepeat(Animator animation) {
		// TODO Auto-generated method stub
		Log.i("CXC", "---onAnimationRepeat++++");

	}

	@Override
	public void onAnimationStart(Animator animation) {
		// TODO Auto-generated method stub
		Log.i("CXC", "---onAnimationStart++++");
		view.setVisibility(View.VISIBLE);
	}

}

4》MainActivity.java

package com.demo.activity;

import com.demo.animationlistener.AnimatorListenerClass;
import com.demo.animationlistener.AnimatorUpdateListenerClass;
import com.demo.animationtest.R;
import com.demo.animationtest.R.color;

import android.animation.ValueAnimator;
import android.app.ActionBar.LayoutParams;
import android.app.Activity;
import android.graphics.Color;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.view.animation.LinearInterpolator;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.RelativeLayout;

public class MainActivity extends Activity {
	// 声明控件
	private ViewGroup rootViewGroup;
	private Button start_btn;

	// 手机屏幕大小
	private float mWindowHeight;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);

		init();

	}

	// 初始化操作
	private void init() {
		// 得到控件
		rootViewGroup = (ViewGroup) findViewById(R.id.rootRelativeLayout);
		start_btn = (Button) findViewById(R.id.start_btn);

		mWindowHeight = getWindowManager().getDefaultDisplay().getHeight();
		Log.i("CXC", "----mWindowHeight:" + mWindowHeight);

		// 设置动画的刷新时间--不一定严格按指定的时间做。
		ValueAnimator.setFrameDelay(200L);

		// 注册事件
		start_btn.setOnClickListener(myButtOnClickListener);

	}

	OnClickListener myButtOnClickListener = new OnClickListener() {

		@Override
		public void onClick(View v) {
			// TODO Auto-generated method stub
			Log.i("CXC", "myButtonClickListener--click");
			switch (v.getId()) {

			case R.id.start_btn:
				startButtonClick();
				break;

			default:
				break;
			}

		}
	};
	// Just for test
	int index = 0;

	public void startButtonClick() {

		ImageView s7_iv = new ImageView(getApplicationContext());
		
		
		switch (index % 3) {
		case 0:
			s7_iv.setBackgroundColor(Color.parseColor("#ff0000"));
			break;
		case 1:

			s7_iv.setBackgroundColor(Color.parseColor("#00ff00"));
			break;
		case 2:

			s7_iv.setBackgroundColor(Color.parseColor("#0000ff"));
			break;

		default:
			break;
		}
		index++;

		// s7_iv.setBackgroundColor(Color.parseColor("#ff0000"));
		s7_iv.setVisibility(View.GONE);
		// 将该view设置为在其父布局中水平居中
		RelativeLayout.LayoutParams imgViewLayoutParams = new RelativeLayout.LayoutParams(
				40, 300);
		imgViewLayoutParams.addRule(RelativeLayout.CENTER_HORIZONTAL);

		// 将创建的控件添加到Activity中
		rootViewGroup.addView(s7_iv, imgViewLayoutParams);

		// 指定垂直移动的范围
		ValueAnimator mValueAnimator = ValueAnimator.ofFloat(0,
				mWindowHeight - 500);
		// 线性变化，即匀速
		mValueAnimator.setInterpolator(new LinearInterpolator());

		Log.i("CXC", "----s7_iv.getHeight:" + s7_iv.getHeight());
		mValueAnimator.setTarget(s7_iv);

		mValueAnimator.addListener(new AnimatorListenerClass(s7_iv));

		mValueAnimator
				.addUpdateListener(new AnimatorUpdateListenerClass(s7_iv));

		mValueAnimator.setDuration(5000).start();

	}
}

5》运行效果：

6》log如下：