自定义View画圆球+Hanlder倒计时跳转

MainActivity

import android.animation.ValueAnimator;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.support.v7.app.AppCompatActivity;

import com.example.montchcode.MyView.MyViews;
import com.example.montchcode.activity.HomeActivity;

public class MainActivity extends AppCompatActivity {

    private MyViews mv;
     int item=2;
    Handler handler=new Handler();
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        mv = (MyViews) findViewById(R.id.mv);
        initData();

    }

    private void initData() {
        // 通过静态方法构建一个ValueAnimator对象
        // 设置数值集合
        ValueAnimator animator = ValueAnimator.ofFloat(0f, 200.0f);
        // 设置作用对象
        animator.setTarget(mv);
        // 设置执行时间(1000ms)
        animator.setDuration(2000);

        // 添加动画更新监听
        animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
            @Override
            public void onAnimationUpdate(ValueAnimator animation) {
                // 获取当前值
                Float mValue = (Float) animation.getAnimatedValue();
                // 设置横向偏移量
                mv.setTranslationX(mValue);
                // 设置纵向偏移量
                mv.setTranslationY(mValue);

            }
        });
        // 开始动画
        animator.start();
        //倒计时2秒跳转
        final Handler handler=new Handler();
        handler.postDelayed(new Runnable() {
            @Override
            public void run() {
              item--;
                if (item==1){

                    Intent intent=new Intent(MainActivity.this, HomeActivity.class);
                    startActivity(intent);
                }
               handler.postDelayed(this,2000);

            }
        },2000);

    }
}

activity_main布局

<?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:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.example.montchcode.MainActivity">


    <com.example.montchcode.MyView.MyViews
        android:id="@+id/mv"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

</RelativeLayout>

自定义View

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.util.AttributeSet;
import android.view.View;

 
public class MyViews extends View {

    private Paint paint;

    public MyViews(Context context) {
        super(context);
        init();
    }

    public MyViews(Context context, AttributeSet attrs) {
        super(context, attrs);
        init();
    }

    public MyViews(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        init();
    }

    private void init() {
        paint = new Paint();
        paint.setAntiAlias(true);
        //圆，空心圆
        paint.setColor(Color.BLUE);

    }

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        canvas.drawCircle(50,50,50,paint);
    }
}