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。
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