Android实现QQ侧滑菜单效果

<?xml version="1.0" encoding="utf-8"? 
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="240dp"
android:background="@mipmap/menu_bg"
android:layout_height="match_parent"
android:orientation="vertical" 

<LinearLayout
  android:orientation="vertical"
  android:layout_width="match_parent"
  android:layout_height="match_parent" 

  <TextView
    style="@style/menu_style"
    android:text="新闻"
    android:drawableLeft="@mipmap/tab_news" / 
  <TextView
    style="@style/menu_style"
    android:text="订阅"
    android:drawableLeft="@mipmap/tab_read" / 
  <TextView
    style="@style/menu_style"
    android:text="跟帖"
    android:drawableLeft="@mipmap/tab_ties" / 
  <TextView
    style="@style/menu_style"
    android:text="图片"
    android:drawableLeft="@mipmap/tab_pics" / 
  <TextView
    style="@style/menu_style"
    android:text="话题"
    android:drawableLeft="@mipmap/tab_ugc" / 
  <TextView
    style="@style/menu_style"
    android:text="投票"
    android:drawableLeft="@mipmap/tab_vote" / 
  <TextView
    style="@style/menu_style"
    android:text="本地"
    android:drawableLeft="@mipmap/tab_local" / 
  <TextView
    style="@style/menu_style"
    android:text="聚合阅读"
    android:drawableLeft="@mipmap/tab_focus" / 

  <TextView
    style="@style/menu_style"
    android:text="聚合阅读"
    android:drawableLeft="@mipmap/tab_focus" / 

  <TextView
    style="@style/menu_style"
    android:text="聚合阅读"
    android:drawableLeft="@mipmap/tab_focus" / 

  <TextView
    style="@style/menu_style"
    android:text="聚合阅读"
    android:drawableLeft="@mipmap/tab_focus" / 

  <TextView
    style="@style/menu_style"
    android:text="聚合阅读"
    android:drawableLeft="@mipmap/tab_focus" / 

</LinearLayout 
</ScrollView 

<?xml version="1.0" encoding="utf-8"? 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" 

<LinearLayout
  android:gravity="center_vertical"
  android:background="@mipmap/top_bar_bg"
  android:orientation="horizontal"
  android:layout_width="match_parent"
  android:layout_height="wrap_content" 
  <ImageButton
    android:background="@null"
    android:id="@+id/ib_back"
    android:src="@mipmap/main_back"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content" / 
  <ImageView
    android:src="@mipmap/top_bar_divider"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content" / 

  <TextView
    android:layout_weight="1"
    android:gravity="center"
    android:text="黑马新闻"
    android:textSize="20sp"
    android:textColor="#fff"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content" / 

</LinearLayout 

<TextView
  android:gravity="center"
  android:textColor="#cfcfcf"
  android:textSize="20sp"
  android:text="钓鱼岛是中国的..."
  android:layout_width="match_parent"
  android:layout_height="match_parent" / 

</LinearLayout 

<?xml version="1.0" encoding="utf-8"? 
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools" android:id="@+id/activity_main"
android:layout_width="match_parent" android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.example.a1_.MainActivity" 

<com.example.a1_.SlidingMenu
  android:id="@+id/slidingmenu"
  android:layout_width="match_parent"
  android:layout_height="match_parent" 
  <include layout="@layout/menu"/ 
  <include layout="@layout/main"/ 
</com.example.a1_.SlidingMenu 
</RelativeLayout 

package com.example.a1_;
import android.content.Context;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
import android.widget.RelativeLayout;
import android.widget.Scroller;
/**
* Created by Administrator on 2017.05.29.0029.
*/
public class SlidingMenu extends RelativeLayout {
private float downX;
private int destance;
private int menuWidth;
private int endx;
private int dx;
private final Scroller scroller;
private float downY;
private int dy;
public SlidingMenu(Context context, AttributeSet attrs) {
super(context, attrs);
//创建Scroller对象
scroller = new Scroller(context);
}
@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
//获取子控件
View menu = getChildAt(0);
View main = getChildAt(1);
//获取菜单布局的宽度
menuWidth = menu.getMeasuredWidth();
//把菜单布局布置在屏幕左侧
menu.layout(-menuWidth,t,0,b);
//主页面使用默认的位置就可以
main.layout(l,t,r,b);
}
//给布局添加一个touch事件
@Override
public boolean onTouchEvent(MotionEvent event) {
switch (event.getAction()){
case MotionEvent.ACTION_DOWN:
//当手指按下时,记录一下手指的位置
downX = event.getX();
break;
case MotionEvent.ACTION_MOVE:
//当手指移动的时候,记录移动的距离
destance = (int) (event.getX()- downX+endx);
//对手指滑动的时候,页面移动做出限制
if (destance menuWidth){
destance = menuWidth;
}else if (destance<0){
destance = 0;
}
scrollTo(-destance,0);
break;
case MotionEvent.ACTION_UP:
//当手指离开屏幕的时候,记录菜单的位置,根据情况进行判定
if (destance<menuWidth/2){
endx = 0;
}else {
endx = menuWidth;
}
int startX = destance;
//计算偏移量
dx = endx-destance;
scroller.startScroll(startX,0,dx,0,Math.abs(dx)*10);
invalidate();
break;
}
return true;
}
//重写computeScroll
@Override
public void computeScroll() {
if (scroller.computeScrollOffset()){
int currx = scroller.getCurrX();
scrollTo(-currx,0);
invalidate();
}
}
//处理滑动冲突
@Override
public boolean onInterceptTouchEvent(MotionEvent ev) {
switch (ev.getAction()){
case MotionEvent.ACTION_DOWN:
//获取当前点击的位置
downX = ev.getX();
downY = ev.getY();
break;
case MotionEvent.ACTION_MOVE:
//获取x和y方向的偏移量
dx = (int) (ev.getX()-downX);
dy = (int) (ev.getY() - downY);
//判断是x方向偏移的多还是y方向偏移得多
if (Math.abs(dx) Math.abs(dy)){
//拦截move事件
return true;
}
break;
}
return super.onInterceptTouchEvent(ev);
}
//判断当前的菜单状态是打开还是关闭的
public void switchMenu(){
int startX = 0;
if (endx == 0){
endx = menuWidth;
}else {
endx = 0;
startX = menuWidth;
}
//设置偏移量
int dx = endx-startX;
scroller.startScroll(startX,0,dx,0,Math.abs(dx)*10);
invalidate();
}
}

package com.example.a1_;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.ImageButton;
public class MainActivity extends AppCompatActivity {
private SlidingMenu slidingMenu;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//初始化控件
ImageButton imageButton = (ImageButton) findViewById(R.id.ib_back);
slidingMenu = (SlidingMenu) findViewById(R.id.slidingmenu);
//设置点击事件
imageButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
slidingMenu.switchMenu();
}
});
}
}