Android屏幕随机位置弹出View

最近项目中人脸注册需要尽量多的捕捉人脸特征，就要想办法使得人脸在注册中呈现不同角度，于是想到在屏幕内随机位置弹出一个吸引注意力的View。
本文中主要用到:
1.view.setX();setY()方法。
2.帧动画简单使用
3.addView前记得removeView();

package com.interjoy.testdemo;

import android.app.Activity;
import android.content.Context;
import android.graphics.drawable.AnimationDrawable;
import android.graphics.drawable.Drawable;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.DisplayMetrics;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;
import android.widget.FrameLayout;
import android.widget.ImageView;

import java.util.Random;

public class SparkActivity extends Activity {
    private FrameLayout frameLayout;//烟花的父控件
    private int screenWidth, screenHeight;//屏幕的宽度，高度
    private ImageView imageView;//显示烟花动画

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        setContentView(R.layout.activity_spark);
        initViews();
    }

    private void initViews() {
        //获取屏幕宽高
        WindowManager wm = (WindowManager) getSystemService(Context.WINDOW_SERVICE);
        DisplayMetrics outMetrics = new DisplayMetrics();
        wm.getDefaultDisplay().getMetrics(outMetrics);
        screenWidth = outMetrics.widthPixels;
        screenHeight = outMetrics.heightPixels;
        frameLayout = (FrameLayout) findViewById(R.id.fl_spark);
        imageView = new ImageView(this);
        //点击事件弹出动画
        findViewById(R.id.btn_popup).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                frameLayout.removeAllViews();//避免重复添加某控件，所以要移除
                loadAnim2();
            }
        });
    }

    private void loadAnim2() {
        //动画控件的宽高
        int viewWidth = 255;
        int viewHeight = 255;
        //随机生成一个屏内的位置来显示动画
        int x = getRandomInt(screenWidth - viewWidth);
        int y = getRandomInt(screenHeight - viewHeight);
        imageView.setX(x);
        imageView.setY(y);
        //设置动画的宽和高
        FrameLayout.LayoutParams lp = new FrameLayout.LayoutParams(viewWidth, viewHeight);
        frameLayout.addView(imageView, lp);
        AnimationDrawable anim = new AnimationDrawable();
        for (int i = 1; i < 22; i++) {//资源文件res/drawable中有图片bomb1~bomb21
            int id = getResources().getIdentifier("bomb" + i, "drawable", getPackageName());
            Drawable drawable = getResources().getDrawable(id);
            anim.addFrame(drawable, 100);
        }
        anim.setOneShot(false);
        imageView.setImageDrawable(anim);
        anim.start();
    }


    //生成随机数 范围 [0,max)
    private int getRandomInt(int max) {
        Random random = new Random();
        return random.nextInt(max);
    }
}

布局文件

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout 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"
    tools:context="com.interjoy.testdemo.SparkActivity">

    <FrameLayout
        android:id="@+id/fl_spark"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

    <Button
        android:id="@+id/btn_popup"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="bottom|center_horizontal"
        android:layout_marginBottom="40dp"
        android:text="随机弹烟花" />
</FrameLayout>

贴上一张效果图：