android 自己定义开关(SwitchButton)

近期心血来潮,写了一个自己定义仿iPhone的开关。

有须要的同学能够来下载啦。支持点击自己主动滚动,速率能够自己依据须要改动。触摸滚动,大小自己定义,支持改动样式。就不录制动画,就上传了两张图给大家看看。

android 自己定义开关(SwitchButton)      android 自己定义开关(SwitchButton)

主要代码:

package com.example.switchbutton;

import android.annotation.SuppressLint;
import android.content.Context;
import android.content.res.Resources;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.RectF;
import android.os.Handler;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewConfiguration;

public class SwitchButton extends View {
	
	public static final int DEFAULT_WIDTH = 100;
	public static final int DEFAULT_HEIGTH = 45;
	public static final int PER_POST_TIME = 20;
	public static final int CLICK = 0;
	public static final int LEFT  = 1;
	public static final int RIGHT  = 2;
	
	private int mSelectBg;
	private int mUnSelectBg;
	private int mBorderColor;
	private int mSelectCirlceColor;
	private int mUnSelectCircleColor;
	private boolean isChecked;
	private Paint mPaint;
	private int mWidth;
	private int mHeight;
	private int mClickTimeout;  
	private int mTouchSlop; 
	private float mAnimMove;
	private final float VELOCITY = 350;
	private float firstDownX;
	private float firstDownY;
	private float lastDownX;
	private int mCriclePostion;
	private int mStartCriclePos;
	private int mEndCirclePos;
	private boolean isScroll;
	private int status;
	private Handler mHander;
	private AnimRunnable mAnim;

	private OnCheckChangeListener mOnCheckChangeListener;
	
	
	public interface OnCheckChangeListener {
		
		void OnCheck(SwitchButton switchButton,boolean isChecked);
	}

	public SwitchButton(Context context, AttributeSet attrs) {
		super(context, attrs);
		Resources res = getResources();
		int defaultSelectBg = res.getColor(R.color.default_switch_button_select_bg);
		int defaultUnSelectBg = res.getColor(R.color.default_switch_button_unselect_bg);
		int defaultBorderColor = res.getColor(R.color.default_switch_button_border_color);
		int defaultSelectCircleColor = res.getColor(R.color.default_switch_button_select_color);
		int defaultUnSelectCircleColor = res.getColor(R.color.default_switch_button_unselect_color);
		TypedArray a = context.obtainStyledAttributes(attrs,R.styleable.SwitchButton);
		mSelectBg = a.getColor(R.styleable.SwitchButton_select_bg, defaultSelectBg);
		mUnSelectBg = a.getColor(R.styleable.SwitchButton_unselect_bg, defaultUnSelectBg);
		mBorderColor = a.getColor(R.styleable.SwitchButton_select_border_color, defaultBorderColor);
		mSelectCirlceColor = a.getColor(R.styleable.SwitchButton_select_cricle_color, defaultSelectCircleColor);
		mUnSelectCircleColor = a.getColor(R.styleable.SwitchButton_unselect_cricle_color, defaultUnSelectCircleColor);
		isChecked = a.getBoolean(R.styleable.SwitchButton_isChecked,false);
		a.recycle();
		initView(context);
	}

	private void initView(Context context) {
		
		mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
		final float density = getResources().getDisplayMetrics().density;  
		mAnimMove = (int) (VELOCITY * density + 0.5f) / 150; //自己主动滚动速度
        mClickTimeout = ViewConfiguration.getPressedStateDuration()  
                + ViewConfiguration.getTapTimeout();  //点击时间
        mTouchSlop = ViewConfiguration.get(context).getScaledTouchSlop();//触摸滚动Slop
        mHander = new Handler();
        mAnim = new AnimRunnable();
	}
	
	
	@SuppressLint("DrawAllocation")
	@Override
	protected void onDraw(Canvas canvas) {
		super.onDraw(canvas);
		
		mPaint.setColor(mBorderColor);
		mPaint.setStyle(Paint.Style.STROKE);
		RectF rect = new RectF(0, 0, mWidth, mHeight);
		canvas.drawRoundRect(rect, mHeight/2, mHeight/2, mPaint);
		mPaint.setColor(isChecked ?

mSelectBg :mUnSelectBg); RectF innerRect = new RectF(1, 1, mWidth -1, mHeight -1); canvas.drawRoundRect(innerRect, mHeight/2 -1, mHeight/2 -1, mPaint); mPaint.setColor(isChecked ? mSelectCirlceColor : mUnSelectCircleColor); mPaint.setStyle(Paint.Style.FILL); canvas.drawCircle(mCriclePostion, mHeight/2, mHeight/2 -1, mPaint); } @Override public boolean onTouchEvent(MotionEvent event) { float x = event.getX(); float y = event.getY(); switch (event.getAction()) { case MotionEvent.ACTION_DOWN: if(isScroll){ return false; } firstDownX = x; firstDownY = y; lastDownX = x; mCriclePostion = isChecked ?

mEndCirclePos : mStartCriclePos; break; case MotionEvent.ACTION_MOVE: float delaX = x - lastDownX; setCriclePositon(delaX); lastDownX = x; invalidate(); break; case MotionEvent.ACTION_UP: float totalX = x - firstDownX; float totalY = y - firstDownY; float time = event.getEventTime() - event.getDownTime(); if(totalX < mTouchSlop && totalY <mTouchSlop && time < mClickTimeout){ status = CLICK; startAutoScroll(); }else{ delaX = x - lastDownX; setCriclePositon(delaX); status = mCriclePostion < mWidth / 2 ? LEFT :RIGHT; startAutoScroll(); } break; } return true; } //開始自己主动滚动 private void startAutoScroll(){ isScroll = true; mHander.postDelayed(mAnim, PER_POST_TIME); } class AnimRunnable implements Runnable{ @Override public void run() { mHander.postDelayed(this, PER_POST_TIME); moveView(); } //移动 private void moveView() { if((status == CLICK && isChecked) || status == LEFT){ mCriclePostion -= mAnimMove; if(mCriclePostion < mHeight /2){ mCriclePostion = mHeight/2; stopView(false); } }else if((status == CLICK && !isChecked) || status == RIGHT) { mCriclePostion += mAnimMove; if(mCriclePostion > mWidth -mHeight /2){ mCriclePostion = mWidth -mHeight /2; stopView(true); } } invalidate(); } //停止移动View private void stopView(boolean endChecked) { mHander.removeCallbacks(mAnim); isScroll = false; isChecked = endChecked; //回调监听事件 if(mOnCheckChangeListener != null){ mOnCheckChangeListener.OnCheck(SwitchButton.this, isChecked); } } } //设置圆心的位置 private synchronized void setCriclePositon(float delaX){ int pos = (int) (mCriclePostion + delaX); if(pos < mHeight / 2){ mCriclePostion = mHeight / 2; }else if(pos > mWidth - mHeight /2){ mCriclePostion = mWidth - mHeight /2; }else{ mCriclePostion = pos; } } @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { int widthMode = MeasureSpec.getMode(widthMeasureSpec); if(widthMode == MeasureSpec.UNSPECIFIED || widthMode == MeasureSpec.AT_MOST){ mWidth = DEFAULT_WIDTH; }else{ mWidth = MeasureSpec.getSize(widthMeasureSpec); } int heightMode = MeasureSpec.getMode(heightMeasureSpec); if(heightMode == MeasureSpec.UNSPECIFIED || heightMode == MeasureSpec.AT_MOST){ mHeight = DEFAULT_HEIGTH; }else{ mHeight = MeasureSpec.getSize(heightMeasureSpec); } mStartCriclePos = mHeight / 2; mEndCirclePos = mWidth - mHeight /2; mCriclePostion = isChecked ? mEndCirclePos :mStartCriclePos; setMeasuredDimension(mWidth, mHeight); } public boolean isChecked() { return isChecked; } public void setChecked(boolean isChecked) { this.isChecked = isChecked; invalidate(); } public void setOnCheckChangeListener(OnCheckChangeListener onCheckChangeListener) { this.mOnCheckChangeListener = onCheckChangeListener; } }

attrs:

<?

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

> <resources> <declare-styleable name="SwitchButton"> <attr name="select_bg" format="color"/> <attr name="unselect_bg" format="color"/> <attr name="select_border_color" format="color"/> <attr name="select_cricle_color" format="color"/> <attr name="unselect_cricle_color" format="color"/> <attr name="isChecked" format="boolean"></attr> </declare-styleable> </resources>


下载地址:http://download.csdn.net/detail/huangyanbin123/8173521

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