自定义波形图View，LayoutInflater动态加载控件保存为本地图片

效果图：
在这里插入图片描述

页面布局：

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="@dimen/dp_145"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:background="@color/white">

    <TextView
        android:id="@+id/tv_index"
        android:layout_width="@dimen/dp_30"
        android:layout_height="match_parent"
        android:layout_gravity="center"
        android:background="@color/common_btn_clicked"
        android:gravity="center"
        android:textColor="@color/white"
        android:textSize="@dimen/sp_14"
        tools:text="TH"/>

    <RelativeLayout
        android:id="@+id/rl_wave_view"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="@color/white">

        <com.kl.common_base.view.wave.GridView
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            app:bgColor="#f0d3a9"/>

        <com.kl.common_base.view.wave.PdfEcgWaveView
            android:id="@+id/wave_view"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:visibility="visible" />

        <TextView
            android:id="@+id/tv_file_create_date"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginStart="@dimen/dp_20"
            android:layout_marginTop="@dimen/dp_10"
            android:text=""
            android:textColor="@color/colorPrimary"
            android:textSize="@dimen/sp_12"
            tools:text="2019年6月26日11:54" />
    </RelativeLayout>
</LinearLayout>

自定义波形图控件：

package com.kl.common_base.view.wave;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.support.annotation.Nullable;
import android.util.AttributeSet;
import android.util.Log;
import android.view.View;

import com.kl.common_base.R;
import com.kl.common_base.utils.SizeUtils;

import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;

public class PdfEcgWaveView extends View {
   
    private List<Short> pointList = Collections.synchronizedList(new LinkedList<>());
    private Paint mPaint;
    private Paint mPaintLine;
    private int mWidth = 0;
    private int mHeight = 0;
    private int mCenterY = 0;
    public float points[];
    List<Short> nativeDatas = null;
    private int len = 0;
    private int index = 0;

    private int zoom;
    private float gapX