Android左侧滑动菜单
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SlideActivity.java:
package com.demo.slide; import android.app.Activity; import android.os.Bundle; import android.view.View; import android.view.Window; import com.demo.broadcast.R; public class SlideActivity extends Activity { private SlidingMenu mLeftMenu ; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); requestWindowFeature(Window.FEATURE_NO_TITLE); setContentView(R.layout.slide_main); mLeftMenu = (SlidingMenu) findViewById(R.id.id_menu); } public void toggleMenu(View view) { mLeftMenu.toggle(); } }
SlidingMenu.java:
package com.demo.slide; import android.content.Context; import android.util.AttributeSet; import android.util.DisplayMetrics; import android.util.TypedValue; import android.view.MotionEvent; import android.view.ViewGroup; import android.view.WindowManager; import android.widget.HorizontalScrollView; import android.widget.LinearLayout; public class SlidingMenu extends HorizontalScrollView { private LinearLayout mWapper; private ViewGroup mMenu; private ViewGroup mContent; private int mScreenWidth; private int mMenuWidth; // dp private int mMenuRightPadding = 80; private boolean once; private boolean isOpen; /** * 未使用自定义属性时,调用 * * @param context * @param attrs */ public SlidingMenu(Context context, AttributeSet attrs) { this(context, attrs, 0); } /** * 当使用了自定义属性时,会调用此构造方法 * * @param context * @param attrs * @param defStyle */ public SlidingMenu(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); WindowManager wm = (WindowManager) context .getSystemService(Context.WINDOW_SERVICE); DisplayMetrics outMetrics = new DisplayMetrics(); wm.getDefaultDisplay().getMetrics(outMetrics); mScreenWidth = outMetrics.widthPixels; mMenuRightPadding = (int) TypedValue.applyDimension( TypedValue.COMPLEX_UNIT_DIP, 50, context .getResources().getDisplayMetrics()); } public SlidingMenu(Context context) { this(context, null); } /** * 设置子View的宽和高 设置自己的宽和高 */ @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { if (!once) { mWapper = (LinearLayout) getChildAt(0); mMenu = (ViewGroup) mWapper.getChildAt(0); mContent = (ViewGroup) mWapper.getChildAt(1); mMenuWidth = mMenu.getLayoutParams().width = mScreenWidth - mMenuRightPadding; mContent.getLayoutParams().width = mScreenWidth; once = true; } super.onMeasure(widthMeasureSpec, heightMeasureSpec); } /** * 通过设置偏移量,将menu隐藏 */ @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(mMenuWidth, 0); } } @Override public boolean onTouchEvent(MotionEvent ev) { int action = ev.getAction(); switch (action) { case MotionEvent.ACTION_UP: // 隐藏在左边的宽度 int scrollX = getScrollX(); if (scrollX >= mMenuWidth / 2) { this.smoothScrollTo(mMenuWidth, 0); isOpen = false; } else { this.smoothScrollTo(0, 0); isOpen = true; } return true; } return super.onTouchEvent(ev); } /** * 打开菜单 */ public void openMenu() { if (isOpen) return; this.smoothScrollTo(0, 0); isOpen = true; } public void closeMenu() { if (!isOpen) return; this.smoothScrollTo(mMenuWidth, 0); isOpen = false; } /** * 切换菜单 */ public void toggle() { if (isOpen) { closeMenu(); } else { openMenu(); } } }
slide_main.xml:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" > <com.demo.slide.SlidingMenu android:id="@+id/id_menu" android:layout_width="match_parent" android:layout_height="match_parent" > <LinearLayout android:layout_width="wrap_content" android:layout_height="match_parent" android:orientation="horizontal" > <include layout="@layout/left_menu" /> <LinearLayout android:layout_width="match_parent" android:layout_height="match_parent" android:background="#ffffff" > <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:onClick="toggleMenu" android:text="切换" /> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center" android:layout_marginLeft="20dp" android:text="我是主content" android:textColor="#ff00ff" android:textSize="20sp" /> </LinearLayout> </LinearLayout> </com.demo.slide.SlidingMenu> </RelativeLayout>
left_menu.xml:
<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:background="#000000" > <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_centerInParent="true" android:orientation="vertical" > <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="20dp" android:text="我是左侧Menu" android:textColor="#ffffff" android:textSize="20sp" /> </LinearLayout> </RelativeLayout>
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