Android属性动画之第一重修炼总结

  经过这两天对ObjectAnimator属性动画的学习,基本对Android提供的属性动画有了一定的认识,现在就为大家以一个类似扇形打开的效果做总结。

效果图:

Android属性动画之第一重修炼总结

  下面就让我们用刚刚学到的属性动画效果,来实现上述的效果;首先我们需要准备8张小图标,将他们放到res目录下的drawable文件中,下面就是布局文件,布局文件很简单,就是把这8张小图标使用ImageView引入到界面中,需要注意的就是把做为开关的图标,放到最下面,下面就看一下具体的实现:

/**

 * 属性动画综合小例子

 * Created by Administrator on 2015/2/14.

 */

public class ThreeActivity extends Activity implements View.OnClickListener{

    private int[] image = {R.id.imageA, R.id.imageB, R.id.imageC, R.id.imageD, R.id.imageE, R.id.imageF, R.id.imageG, R.id.imageH};

    private String[] str = {"开关","相机","音乐","地址","月亮","个人信息","定位","短信"};

    private List<ImageView> list = new ArrayList<ImageView>();

    private Boolean flag = true;//图标打开、关闭控制

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_three);

        init();

    }



    public void init(){

        for(int i = 0; i<image.length; i++){

            ImageView imageView = (ImageView)findViewById(image[i]);

            imageView.setOnClickListener(this);

            list.add(imageView);

        }

    }



    @Override

    public void onClick(View view) {

        switch (view.getId()) {

            case R.id.imageA:

                if(flag) {

                    startanim();//打开

                }else{

                    closeanim();//收起

                }

                break;

            case R.id.imageB:

                Toast.makeText(this, str[1], Toast.LENGTH_SHORT).show();

                break;

            case R.id.imageC:

                Toast.makeText(this, str[2], Toast.LENGTH_SHORT).show();

                break;

            case R.id.imageD:

                Toast.makeText(this, str[3], Toast.LENGTH_SHORT).show();

                break;

            case R.id.imageE:

                Toast.makeText(this, str[4], Toast.LENGTH_SHORT).show();

                break;

            case R.id.imageF:

                Toast.makeText(this, str[5], Toast.LENGTH_SHORT).show();

                break;

            case R.id.imageG:

                Toast.makeText(this, str[6], Toast.LENGTH_SHORT).show();

                break;

            case R.id.imageH:

                Toast.makeText(this, str[7], Toast.LENGTH_SHORT).show();

                break;

            default:

                break;

        }

    }


  //打开隐藏的图标
public void startanim(){ for(int i = list.size()-1, j = 0; i >= 0; i--,j++){ ObjectAnimator animator = ObjectAnimator.ofFloat(list.get(i), "translationY", 0F, i*80F); animator.setDuration(500);//持续时间 animator.setInterpolator(new BounceInterpolator());//自由落体效果 animator.setStartDelay(j * 100);//间隔时间 animator.start(); } flag = false; }   
  //关闭打开的图标
public void closeanim(){ for(int i = 0; i < list.size(); i++){ ObjectAnimator animator = ObjectAnimator.ofFloat(list.get(i), "translationY", i*80F, 0F); animator.setDuration(500); animator.setStartDelay(i * 100); animator.start(); } flag = true; } }

  对于代码中的不易理解部分,我已进行了注释,相信大家一看便可以理解。最后为大家附一张实习后的效果:

Android属性动画之第一重修炼总结

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