卫星效果的实现（上下方向）

最新推荐文章于 2022-05-13 00:15:05 发布

小蜗牛翻田埂

最新推荐文章于 2022-05-13 00:15:05 发布

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CC 4.0 BY-SA版权

文章标签：卫星效果简单明了

本文链接：https://blog.youkuaiyun.com/kai1ge1/article/details/71120737

本文介绍了一个简单的Android应用程序，演示了如何使用ObjectAnimator实现视图的显示与隐藏动画，包括旋转和位移效果。

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最近看了一下卫星效果，觉得不错，就写了一个简单入门的上下方向的。

废话不多说，直接上代码

public class MainActivity extends AppCompatActivity implements View.OnClickListener {

    private View iv_root;
    private View iv_robot;
    private View iv_voice;

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

    private void initView() {
        iv_root = findViewById(R.id.iv_root);
        iv_robot = findViewById(R.id.iv_robot);
        iv_voice = findViewById(R.id.iv_voice);

    }
    private void initListener() {
        iv_root.setOnClickListener(this);
        iv_robot.setOnClickListener(this);
        iv_voice.setOnClickListener(this);
    }

    boolean isopen;
    @Override
    public void onClick(View view) {
        switch (view.getId()){
            case R.id.iv_root:
                if(!isopen){
                    starAnim();
                }else{
                    closeAnim();
                }
                isopen=!isopen;
                break;
            case R.id.iv_robot:
                Toast.makeText(this, "我是机器人", Toast.LENGTH_SHORT).show();
                break;
            case R.id.iv_voice:
                Toast.makeText(this, "我是语音", Toast.LENGTH_SHORT).show();
                break;
        }
    }

    /**
     * 打开动画的操作
     */
    private void starAnim() {
        iv_voice.setVisibility(View.VISIBLE);
        iv_robot.setVisibility(View.VISIBLE);
        int y1=dip2px(50);
        int y2=dip2px(100);
        ObjectAnimator animator1=ObjectAnimator.ofFloat(iv_voice,"translationY",0,-y1);
        ObjectAnimator animator2=ObjectAnimator.ofFloat(iv_robot,"translationY",0,-y2);
        ObjectAnimator animator3=ObjectAnimator.ofFloat(iv_root,"rotation",0,45);
        animator1.setInterpolator(new AccelerateDecelerateInterpolator());
        animator2.setInterpolator(new AccelerateDecelerateInterpolator());
        AnimatorSet set=new AnimatorSet();
        set.playTogether(animator1,animator2,animator3);
        set.setDuration(500);//设置动画时间
        set.start();
    }
    /**
     * 关闭动画的操作
     */
    private void closeAnim() {
        int y1=dip2px(50);
        int y2=dip2px(100);
        ObjectAnimator animator1=ObjectAnimator.ofFloat(iv_voice,"translationY",-y1,0);
        ObjectAnimator animator2=ObjectAnimator.ofFloat(iv_robot,"translationY",-y2,0);
        ObjectAnimator animator3=ObjectAnimator.ofFloat(iv_root,"rotation",45,0);
        animator1.setInterpolator(new AccelerateDecelerateInterpolator());
        animator2.setInterpolator(new AccelerateDecelerateInterpolator());
        AnimatorSet set=new AnimatorSet();
        set.playTogether(animator1,animator2,animator3);
        set.setDuration(500);//设置动画时间
        set.start();

        set.addListener(new Animator.AnimatorListener() {
            @Override
            public void onAnimationStart(Animator animator) {

            }
            @Override
            public void onAnimationEnd(Animator animator) {
                iv_voice.setVisibility(View.GONE);
                iv_robot.setVisibility(View.GONE);
            }
            @Override
            public void onAnimationCancel(Animator animator) {

            }
            @Override
            public void onAnimationRepeat(Animator animator) {

            }
        });
    }
    /**
     * 根据手机的分辨率从 dp 的单位 转成为 px(像素)
     */
    public int dip2px(float dpValue) {
        final float scale =getResources().getDisplayMetrics().density;
        return (int) (dpValue * scale + 0.5f);
    }


}

布局文件

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools" android:id="@+id/activity_main"
    android:layout_width="match_parent" android:layout_height="match_parent"
    tools:context="count.buma.com.textdemo.MainActivity">

    <ImageView
        android:id="@+id/iv_robot"
        android:layout_width="40dp"
        android:layout_height="40dp"
        android:layout_alignParentBottom="true"
        android:layout_alignParentRight="true"
        android:visibility="gone"
        android:src="@mipmap/robot"
        />
    <ImageView
        android:id="@+id/iv_voice"
        android:layout_width="40dp"
        android:layout_height="40dp"
        android:layout_alignParentBottom="true"
        android:layout_alignParentRight="true"
        android:visibility="gone"
        android:src="@mipmap/voice"
        />
    <ImageView
        android:id="@+id/iv_root"
        android:layout_width="40dp"
        android:layout_height="40dp"
        android:layout_alignParentBottom="true"
        android:layout_alignParentRight="true"
        android:src="@mipmap/add"
        />

</RelativeLayout>