示例代码_CheckView

Issue chứa một ví dụ Java Android CheckView, bao gồm onDraw(), check() và unCheck(), nhưng không nêu rõ cần thay đổi điều gì. Trước tiên, hãy xác định kết quả mong muốn đối với tài liệu hoặc ví dụ mã và kiểm tra các ghi chú AndroidNote xung quanh; không thể xác định việc hoàn thành chỉ dựa trên issue.

package com.sloop.canvas;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Rect;
import android.os.Handler;
import android.os.Message;
import android.util.AttributeSet;
import android.util.Log;
import android.view.View;

/**
 * <ul type="disc">
 * <li>Author: Sloop</li>
 * <li>Version: v1.0.0</li>
 * <li>Copyright: Copyright (c) 2015</li>
 * <li>Date: 2016/2/5</li>
 * <li><a href="http://www.sloop.icoc.cc"    target="_blank">作者网站</a>      </li>
 * <li><a href="http://weibo.com/5459430586" target="_blank">作者微博</a>      </li>
 * <li><a href="https://github.com/GcsSloop" target="_blank">作者GitHub</a>   </li>
 * </ul>
 */
public class CheckView extends View {

    private static final int ANIM_NULL = 0;         //动画状态-没有
    private static final int ANIM_CHECK = 1;        //动画状态-开启
    private static final int ANIM_UNCHECK = 2;      //动画状态-结束

    private Context mContext;           // 上下文
    private int mWidth, mHeight;        // 宽高
    private Handler mHandler;           // handler

    private Paint mPaint;
    private Bitmap okBitmap;

    private int animCurrentPage = -1;       // 当前页码
    private int animMaxPage = 13;           // 总页数
    private int animDuration = 500;         // 动画时长
    private int animState = ANIM_NULL;      // 动画状态

    private boolean isCheck = false;        // 是否只选中状态

    public CheckView(Context context) {
        super(context, null);

    }

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

    /**
     * 初始化
     * @param context
     */
    private void init(Context context) {
        mContext = context;

        mPaint = new Paint();
        mPaint.setColor(0xffFF5317);
        mPaint.setStyle(Paint.Style.FILL);
        mPaint.setAntiAlias(true);

        okBitmap = BitmapFactory.decodeResource(mContext.getResources(), R.drawable.checkres);

        mHandler = new Handler() {
            @Override
            public void handleMessage(Message msg) {
                super.handleMessage(msg);
                if (animCurrentPage < animMaxPage && animCurrentPage >= 0) {
                    invalidate();
                    if (animState == ANIM_NULL)
                        return;
                    if (animState == ANIM_CHECK) {

                        animCurrentPage++;
                    } else if (animState == ANIM_UNCHECK) {
                        animCurrentPage--;
                    }

                    this.sendEmptyMessageDelayed(0, animDuration / animMaxPage);
                    Log.e("AAA", "Count=" + animCurrentPage);
                } else {
                    if (isCheck) {
                        animCurrentPage = animMaxPage - 1;
                    } else {
                        animCurrentPage = -1;
                    }
                    invalidate();
                    animState = ANIM_NULL;
                }
            }
        };
    }


    /**
     * View大小确定
     * @param w
     * @param h
     * @param oldw
     * @param oldh
     */
    @Override
    protected void onSizeChanged(int w, int h, int oldw, int oldh) {
        super.onSizeChanged(w, h, oldw, oldh);
        mWidth = w;
        mHeight = h;
    }

    /**
     * 绘制内容
     * @param canvas
     */
    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);

        // 移动坐标系到画布中央
        canvas.translate(mWidth / 2, mHeight / 2);

        // 绘制背景圆形
        canvas.drawCircle(0, 0, 240, mPaint);

        // 得出图像边长
        int sideLength = okBitmap.getHeight();

        // 得到图像选区 和 实际绘制位置
        Rect src = new Rect(sideLength * animCurrentPage, 0, sideLength * (animCurrentPage + 1), sideLength);
        Rect dst = new Rect(-200, -200, 200, 200);

        // 绘制
        canvas.drawBitmap(okBitmap, src, dst, null);
    }


    /**
     * 选择
     */
    public void check() {
        if (animState != ANIM_NULL || isCheck)
            return;
        animState = ANIM_CHECK;
        animCurrentPage = 0;
        mHandler.sendEmptyMessageDelayed(0, animDuration / animMaxPage);
        isCheck = true;
    }

    /**
     * 取消选择
     */
    public void unCheck() {
        if (animState != ANIM_NULL || (!isCheck))
            return;
        animState = ANIM_UNCHECK;
        animCurrentPage = animMaxPage - 1;
        mHandler.sendEmptyMessageDelayed(0, animDuration / animMaxPage);
        isCheck = false;
    }

    /**
     * 设置动画时长
     * @param animDuration
     */
    public void setAnimDuration(int animDuration) {
        if (animDuration <= 0)
            return;
        this.animDuration = animDuration;
    }

    /**
     * 设置背景圆形颜色
     * @param color
     */
    public void setBackgroundColor(int color){
        mPaint.setColor(color);
    }
}