Android 侧滑，左滑，右滑

我也不说废话了，和上一个左滑差不多一样，我就贴一下主要代码，

有什么问题请留言哈，

import android.content.Context;
import android.util.AttributeSet;
import android.util.DisplayMetrics;
import android.view.MotionEvent;
import android.view.ViewGroup;
import android.view.WindowManager;
import android.widget.HorizontalScrollView;
import android.widget.LinearLayout;

public class LeftMenu extends HorizontalScrollView {

	Context context;

	int width;// 屏幕的宽度
	int left_width;// leftmenu宽度
	int right_width;// leftmenu宽度
	int scrolWidth;// 滚动的宽度

	boolean isleftOpen = false;// 判断侧滑菜单是否显示
	boolean isrightOpen = false;

	public LeftMenu(Context context) {
		super(context);
		this.context = context;
	}

	public LeftMenu(Context context, AttributeSet attrs) {
		super(context, attrs);
		this.context = context;
	}

	public LeftMenu(Context context, AttributeSet attrs, int defStyle) {
		super(context, attrs, defStyle);
		this.context = context;
	}

	// 设置空间的大小
	@Override
	protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
		// 获取屏幕的宽度
		WindowManager wm = (WindowManager) context
				.getSystemService(context.WINDOW_SERVICE);
		DisplayMetrics outMetrics = new DisplayMetrics();
		wm.getDefaultDisplay().getMetrics(outMetrics);
		width = outMetrics.widthPixels;
		left_width = (int) (width * 0.8);
		scrolWidth = (int) (left_width / 2);

		LinearLayout wrapper = (LinearLayout) getChildAt(0);
		ViewGroup leftmenu = (ViewGroup) wrapper.getChildAt(0);
		ViewGroup content = (ViewGroup) wrapper.getChildAt(1);
		ViewGroup rightmenu = (ViewGroup) wrapper.getChildAt(2);

		leftmenu.getLayoutParams().width = left_width;// 设置leftmenu的宽度
		content.getLayoutParams().width = width;// 设置正文的宽度
		rightmenu.getLayoutParams().width = left_width;// 设置leftmenu的宽度

		super.onMeasure(widthMeasureSpec, heightMeasureSpec);
	}

	// 设置控件的显示
	@Override
	protected void onLayout(boolean changed, int l, int t, int r, int b) {
		super.onLayout(changed, l, t, r, b);

		if (changed) {
			this.scrollTo(left_width, 0);// 隐藏leftmenu
		}
	}

	@Override
	public boolean onTouchEvent(MotionEvent ev) {
		int action = ev.getAction();
		switch (action) {
		case MotionEvent.ACTION_UP:
			int scrollX = getScrollX();

			if (scrollX > scrolWidth + width) {//判断是左滑还是右滑
				if (scrollX >= scrolWidth + left_width) {
					this.smoothScrollTo(width + left_width, 0);
					isrightOpen = true;

				} else {

					this.smoothScrollTo(left_width, 0);
					isrightOpen = false;

				}
			} else {

				// 如果显示区域大于菜单宽度一半则完全显示，否则隐藏
				if (scrollX >= scrolWidth) {
					this.smoothScrollTo(left_width, 0);
					isleftOpen = false;
				} else {
					this.smoothScrollTo(0, 0);
					isleftOpen = true;

				}
			}
			break;
		}
		return super.onTouchEvent(ev);
	}

	// 判断leftmenu的显示隐藏，主要用于外部按钮的设置menu的显示隐藏
	public void openMenu() {
		if (isleftOpen) {
			this.smoothScrollTo(left_width, 0);
			isleftOpen = false;
		} else {
			this.smoothScrollTo(0, 0);
			isleftOpen = true;
		}

	}

	// 判断rightmenu的显示隐藏，主要用于外部按钮的设置menu的显示隐藏
	public void openRightMenu() {
		if (isrightOpen) {
			this.smoothScrollTo(left_width, 0);
			isrightOpen = false;
		} else {
			this.smoothScrollTo(width + left_width, 0);
			isrightOpen = true;
		}

	}

}