android_105_侧滑菜单

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.sg31.sgslidingmenu.MainActivity" >

<com.sg31.sgslidingmenu.SGSlidingMenu
android:id="@+id/slideMenu"
android:layout_width="match_parent"
android:layout_height="match_parent" >

<!-- 菜单界面的布局 -->
<include layout="@layout/slidingmenu_leftmenu"/>

<!-- 主界面的布局  -->
<include layout="@layout/slidingmenu_rightmain"/>

</com.sg31.sgslidingmenu.SGSlidingMenu>

</RelativeLayout>

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

<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingBottom="300dp"
android:orientation="vertical" >

<TextView
style="@style/MenuTabText"
android:background="#33aa9900"
android:drawableLeft="@drawable/tab_news"
android:text="新闻"/>
<TextView
style="@style/MenuTabText"
android:drawableLeft="@drawable/tab_read"
android:text="订阅"/>
<TextView
style="@style/MenuTabText"
android:drawableLeft="@drawable/tab_ties"
android:text="跟帖"/>
<TextView
style="@style/MenuTabText"
android:drawableLeft="@drawable/tab_pics"
android:text="图片"/>
<TextView
style="@style/MenuTabText"
android:drawableLeft="@drawable/tab_ugc"
android:text="话题"/>
<TextView
style="@style/MenuTabText"
android:drawableLeft="@drawable/tab_vote"
android:text="投票"/>
<TextView
style="@style/MenuTabText"
android:drawableLeft="@drawable/tab_focus"
android:text="聚合阅读"/>

</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:background="#55666666"
android:orientation="vertical" >

<LinearLayout android:layout_width="match_parent"
android:background="@drawable/top_bar_bg"
android:gravity="center_vertical"
android:layout_height="60dp">

<ImageView android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/btn_back"
android:background="@drawable/main_back"/>

<View android:layout_width="1dp"
android:layout_height="match_parent"
android:layout_marginTop="5dp"
android:layout_marginBottom="5dp"
android:background="@drawable/top_bar_divider"/>

<TextView android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#ffffff"
android:textSize="22sp"
android:layout_marginLeft="15dp"
android:text="黑马新闻"/>

</LinearLayout>

<TextView android:layout_width="match_parent"
android:text="钓鱼岛是中国的..."
android:textColor="#000000"
android:textSize="30sp"
android:gravity="center"
android:layout_height="match_parent"/>

</LinearLayout>

package com.sg31.sgslidingmenu;

import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.Window;
import android.widget.ImageView;

public class MainActivity extends ActionBarActivity {

private ImageView btn_back;
private SGSlidingMenu slideMenu;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.activity_main);
btn_back = (ImageView) findViewById(R.id.btn_back);
slideMenu = (SGSlidingMenu) findViewById(R.id.slideMenu);

btn_back.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
slideMenu.switchMenu();
}
});
}

}

package com.sg31.sgslidingmenu;

import android.view.View;
import android.view.animation.Animation;
import android.view.animation.Transformation;

/**
* 让指定view在一段时间内scrollTo到指定位置
* @author Administrator
*
*/
public class SGScrollAnimation extends Animation{

private View view;
private int targetScrollX;
private int startScrollX;
private int totalValue;

public SGScrollAnimation(View view, int targetScrollX) {
super();
this.view = view;
this.targetScrollX = targetScrollX;

startScrollX = view.getScrollX();
totalValue = this.targetScrollX - startScrollX;

int time = Math.abs(totalValue);
setDuration(time);
}

/**
* 在指定的时间内一直执行该方法，直到动画结束
* interpolatedTime：0-1  标识动画执行的进度或者百分比
* time :  0   - 0.5  - 0.7  -   1
* value:  10  -  60  -  80  -  110
* 当前的值 = 起始值 + 总的差值*interpolatedTime
*/
@Override
protected void applyTransformation(float interpolatedTime,
Transformation t) {
super.applyTransformation(interpolatedTime, t);
int currentScrollX = (int) (startScrollX + totalValue*interpolatedTime);
view.scrollTo(currentScrollX, 0);
}
}

package com.sg31.sgslidingmenu;

import android.content.Context;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
import android.widget.FrameLayout;
import android.widget.Scroller;

// 继承自FrameLayout的目的是:免去了Measure的操作
public class SGSlidingMenu extends FrameLayout{
private View menuView,mainView;
private int menuWidth = 0;
private Scroller scroller;
public SGSlidingMenu(Context context, AttributeSet attrs) {
super(context, attrs);
init();
}

public SGSlidingMenu(Context context) {
super(context);
init();
}

private void init(){
scroller = new Scroller(getContext());
}

/**
* 当1级的子view全部加载完调用，可以用初始化子view的引用
* 注意，这里无法获取子view的宽高
*/
@Override
protected void onFinishInflate() {
super.onFinishInflate();
menuView = getChildAt(0);
mainView = getChildAt(1);
menuWidth = menuView.getLayoutParams().width;
}

/**
* widthMeasureSpec和heightMeasureSpec是系统测量SlideMenu时传入的参数，
* 这2个参数测量出的宽高能让SlideMenu充满窗体，其实是正好等于屏幕宽高
*/
//	@Override
//	protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
//		super.onMeasure(widthMeasureSpec, heightMeasureSpec);
//
//		int measureSpec = MeasureSpec.makeMeasureSpec(menuWidth, MeasureSpec.EXACTLY);
//
//		//测量所有子view的宽高
//		//通过getLayoutParams方法可以获取到布局文件中指定宽高
//		menuView.measure(measureSpec, heightMeasureSpec);
//		//直接使用SlideMenu的测量参数，因为它的宽高都是充满父窗体
//		mainView.measure(widthMeasureSpec, heightMeasureSpec);
//
//	}

@Override
public boolean onInterceptTouchEvent(MotionEvent ev) {
switch (ev.getAction()) {
case MotionEvent.ACTION_DOWN:
downX = (int) ev.getX();
break;
case MotionEvent.ACTION_MOVE:
int deltaX = (int) ( ev.getX()- downX);

if(Math.abs(deltaX)>8){
return true;
}
break;
}
return super.onInterceptTouchEvent(ev);
}

/**
* l: 当前子view的左边在父view的坐标系中的x坐标
* t: 当前子view的顶边在父view的坐标系中的y坐标
*/
@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
//		Log.e("MAIN", "L: "+l+"   t: "+t  +"  r: "+r  + "   b: "+b);
menuView.layout(-menuWidth, 0, 0, menuView.getMeasuredHeight());
mainView.layout(0, 0, r, b);
}

private int downX;
@Override
public boolean onTouchEvent(MotionEvent event) {
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
downX = (int) event.getX();
break;
case MotionEvent.ACTION_MOVE:
int moveX = (int) event.getX();
int deltaX = (int) ( moveX- downX);

int newScrollX = getScrollX() - deltaX;

if(newScrollX<-menuWidth)newScrollX = -menuWidth;
if(newScrollX>0)newScrollX = 0;

scrollTo(newScrollX, 0);
downX = moveX;
break;
case MotionEvent.ACTION_UP:
//1.使用自定义动画
//			ScrollAnimation scrollAnimation;
//			if(getScrollX()>-menuWidth/2){
//				//关闭菜单
////				scrollTo(0, 0);
//				scrollAnimation = new ScrollAnimation(this, 0);
//			}else {
//				//打开菜单
////				scrollTo(-menuWidth, 0);
//				scrollAnimation = new ScrollAnimation(this, -menuWidth);
//			}
//			startAnimation(scrollAnimation);
//2.使用Scroller
if(getScrollX()>-menuWidth/2){
//				//关闭菜单
closeMenu();
}else {
//打开菜单
openMenu();
}
break;
}
return true;
}

private void closeMenu(){
scroller.startScroll(getScrollX(), 0, 0-getScrollX(), 0, 400);
invalidate();
}

private void openMenu(){
scroller.startScroll(getScrollX(), 0, -menuWidth-getScrollX(), 0, 400);
invalidate();
}

/**
* Scroller不主动去调用这个方法
* 而invalidate()可以掉这个方法
* invalidate->draw->computeScroll
*/
@Override
public void computeScroll() {
super.computeScroll();
if(scroller.computeScrollOffset()){//返回true,表示动画没结束
scrollTo(scroller.getCurrX(), 0);
invalidate();
}
}

/**
* 切换菜单的开和关
*/
public void switchMenu() {
if(getScrollX()==0){
//需要打开
openMenu();
}else {
//需要关闭
closeMenu();
}
}

}