这两天学习自定义控件,有点小 进步,根据事件分发机制谢了一个简单滑动按钮,希望大家多多提提意见话不多说上代码了PS 图片用别人的自定义控件的图片-.---

package com.zhl.huadong; import android.content.Context; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.graphics.Canvas; import android.graphics.Matrix; import android.graphics.Paint; import android.util.AttributeSet; import android.view.MotionEvent; import android.view.View; public class HuaView extends View { private float downX, nowX;// 按下时的坐标,和最终的X坐标 private boolean isClose = false;// 是否 关闭 默认为关闭状态 private Bitmap mBitmapOpen;// 滑动按钮底部打开时的背景 private Bitmap mBitmapClose;// 滑动按钮底部关闭时的背景 private Bitmap mBitmapHua;// 滑动按钮的滑块 private boolean isSliping = false;// 是否为滑动状态 private Paint mPaint;// 画笔 private OnChangeLister listener;// 回调接口 public HuaView(Context context) { super(context); // TODO Auto-generated constructor stub } public HuaView(Context context, AttributeSet attrs) { this(context, attrs, 0); // TODO Auto-generated constructor stub } public HuaView(Context context, AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); // TODO Auto-generated constructor stub initView(); } public void initView() { mBitmapOpen = BitmapFactory.decodeResource(getResources(), R.drawable.open); mBitmapClose = BitmapFactory.decodeResource(getResources(), R.drawable.close); mBitmapHua = BitmapFactory.decodeResource(getResources(), R.drawable.huakuai); } @Override protected void onDraw(Canvas canvas) { // TODO Auto-generated method stub Matrix matrix = new Matrix(); mPaint = new Paint(); // 设置背景 if (nowX < (mBitmapOpen.getWidth() / 2)) { canvas.drawBitmap(mBitmapClose, matrix, mPaint); } else { canvas.drawBitmap(mBitmapOpen, matrix, mPaint); } float x = 0; // 是否在滑动状态 if (isSliping) { // 判断X 滑块位置 不能 让滑块 出去 if (nowX >= mBitmapOpen.getWidth()) { x = mBitmapOpen.getWidth() - mBitmapHua.getWidth() / 2; } else { x = nowX - mBitmapHua.getWidth() / 2; } } else { // 如果不在滑动状态 if (isClose) { x = mBitmapOpen.getWidth() - mBitmapHua.getWidth(); } else { x = -8;// 可以设置为0但是 当设置为0的时候那个滑块到达不了最左边 } } if (x < 0) { x = -8; } else if (x > mBitmapOpen.getWidth() - mBitmapHua.getWidth()) { x = mBitmapOpen.getWidth() - mBitmapHua.getWidth(); } canvas.drawBitmap(mBitmapHua, x, 0, mPaint); } @Override public boolean onTouchEvent(MotionEvent event) { // TODO Auto-generated method stub switch (event.getAction()) { case MotionEvent.ACTION_DOWN: if (event.getX() > mBitmapClose.getWidth() || event.getY() > mBitmapClose.getHeight()) { return false; } else { isSliping = true; downX = event.getX(); nowX = downX; } break; case MotionEvent.ACTION_MOVE: nowX = event.getX(); break; case MotionEvent.ACTION_UP: isSliping = false; if (event.getX() > (mBitmapOpen.getWidth() / 2)) { isClose = true; nowX = mBitmapOpen.getWidth() - (mBitmapHua.getWidth()); } else { isClose = false; nowX = 0; } break; } invalidate(); return true; } /** * 设置滑动开关的初始状态，供外部调用 * * @param checked */ public void setChecked(boolean checked) { if (checked) { nowX = mBitmapOpen.getWidth(); } else { nowX = -8; } isClose = checked; invalidate(); } public interface OnChangeLister { public void OnChanged(HuaView wiperSwitch, boolean checkState); } /** * 为huaView设置一个监听，供外部调用的方法 * * @param listener */ public void setOnChangedListener(OnChangeLister listener) { this.listener = listener; } }
布局里面使用 <RelativeLayout xmlns:android="" xmlns:tools="" android:layout_width="match_parent" android:layout_height="match_parent" tools:context="com.zhl.huadong.MainActivity" > <com.zhl.huadong.HuaView android:layout_width="wrap_content" android:layout_height="wrap_content" /> </RelativeLayout>

元旦将至 祝大家元旦快乐