Android/CustomView/AnimatorView.java at master · WiCoder/Android · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
/*
 *  COPYRIGHT NOTICE
 *  Copyright (C) 2014, ticktick <lujun.hust@gmail.com>
 *  http://ticktick.blog.51cto.com/
 *
 *  @license under the Apache License, Version 2.0
 *
 *  @file    AnimatorView.java
 *  @brief   实现了一个矩状图动画效果的自定义View
 *
 *  @version 1.0
 *  @author  ticktick
 *  @date    2014/08/27
 *
 */

package com.ticktick.example.view;

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

public class AnimatorView extends View {

	private static final int RECT_WIDTH = 60; //每个矩形块的宽度
	private static final int RECT_DISTANCE = 40; //矩形块之间的间距
	private static final int TOTAL_PAINT_TIMES = 100; //控制绘制速度,分100次完成绘制

	//待绘制的矩形块矩阵，left为高度，right为颜色
	private static final int[][] RECT_ARRAY = {
            {380,Color.GRAY},
            {600,Color.YELLOW},
            {200,Color.GREEN},
            {450,Color.RED},
            {300,Color.BLUE}
	};

	private Paint mPaint;
	private int mPaintTimes = 0;  //当前已经绘制的次数
	private boolean mIsAnimaionRun = false;

	public AnimatorView(Context context) {
            super(context);
            initialize();
	}

	public AnimatorView(Context context, AttributeSet attrs) {
            super(context, attrs);
            initialize();
	}

	public AnimatorView(Context context, AttributeSet attrs, int defStyle) {
            super(context, attrs, defStyle);
            initialize();
        }

	protected void initialize() {
            mPaint = new Paint();
            mPaint.setAntiAlias(true);
            mPaint.setStyle(Style.FILL);
	}

	@Override
	protected void onDraw(Canvas canvas) {

	    if( !mIsAnimaionRun ) {
		return;
	    }

	    mPaintTimes++;

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

		mPaint.setColor(RECT_ARRAY[i][1]);

		int paintXPos = i*(RECT_WIDTH+RECT_DISTANCE) + RECT_DISTANCE;
		int paintYPos = RECT_ARRAY[i][0]/TOTAL_PAINT_TIMES*mPaintTimes;

		canvas.drawRect(paintXPos, getHeight(), paintXPos+RECT_WIDTH,getHeight()-paintYPos, mPaint);
	    }

	    if( mPaintTimes < TOTAL_PAINT_TIMES ) {
		invalidate();
	    }
	}

	public void startAnimation() {
            mIsAnimaionRun = true;
            invalidate();
	}

}