基于Android实现仿QQ5.0侧滑
作者：会飞的一只狼
本课程将带领大家通过自定义控件实现QQ5.0侧滑菜单，课程将循序渐进，首先实现最普通的侧滑菜单，然后引入属性动画与拖动菜单效果相结合，最终实现QQ5.0侧滑菜单效果。通过本课程大家会对侧滑菜单有更深层次的了解，通过自定义控件和属性动画打造千变万化的侧滑菜单效果
本课程将带领大家通过自定义控件实现QQ5.0侧滑菜单，课程将循序渐进，首先实现最普通的侧滑菜单，然后引入属性动画与拖动菜单效果相结合，最终实现QQ5.0侧滑菜单效果。通过本课程大家会对侧滑菜单有更深层次的了解，通过自定义控件和属性动画打造千变万化的侧滑菜单效果
效果图如下所示：
package com.example;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.view.View;
public class MainActivity extends ActionBarActivity {
private SlidingMenu mMenu;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mMenu = (SlidingMenu) findViewById(R.id.id_menu);
}
public void toggleMenu(View view)
{
mMenu.toggle();
}
}
package com.example;
import android.app.Activity;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Rect;
import android.util.DisplayMetrics;
import android.view.View;
import android.view.WindowManager;
/**
* Created by tuhao-pc on 2015/12/28.
* 获取屏幕相关的辅助类
*/
public class ScreenUtils {
private ScreenUtils() {
}
/**
*获取屏幕的高度
* @param context
* @return
*/
public static int getScreenWidth(Context context){
WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
DisplayMetrics outMetrics = new DisplayMetrics();
wm.getDefaultDisplay().getMetrics(outMetrics);
return outMetrics.widthPixels;
}
/**
* 获取屏幕的高度
* @param context
* @return
*/
public static int getScreenHeight(Context context){
WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
DisplayMetrics outMetrics = new DisplayMetrics();
wm.getDefaultDisplay().getMetrics(outMetrics);
return outMetrics.heightPixels;
}
/**
* 获取手机状态栏的状态
* @param context
* @return
*/
public static int getStatusHeight(Context context){
int statusHeight = -1;
Class<?> clazz = null;
try {
clazz = Class.forName("com.android.internal.R$dimen");
Object object = clazz.newInstance();
int height = Integer.parseInt(clazz.getField("status_bar_height").get(object).toString());
statusHeight = context.getResources().getDimensionPixelSize(height);
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (NoSuchFieldException e) {
e.printStackTrace();
} catch (InstantiationException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
}
return statusHeight;
}
/**
* 获取当前屏幕截图，包含状态栏
*
* @param activity
* @return
*/
public static Bitmap snapShotWithStatusBar(Activity activity)
{
View view = activity.getWindow().getDecorView();
view.setDrawingCacheEnabled(true);
view.buildDrawingCache();
Bitmap bmp = view.getDrawingCache();
int width = getScreenWidth(activity);
int height = getScreenHeight(activity);
Bitmap bp = null;
bp = Bitmap.createBitmap(bmp, 0, 0, width, height);
view.destroyDrawingCache();
return bp;
}
/**
* 获取当前屏幕截图，不包含状态栏
*
* @param activity
* @return
*/
public static Bitmap snapShotWithoutStatusBar(Activity activity)
{
View view = activity.getWindow().getDecorView();
view.setDrawingCacheEnabled(true);
view.buildDrawingCache();
Bitmap bmp = view.getDrawingCache();
Rect frame = new Rect();
activity.getWindow().getDecorView().getWindowVisibleDisplayFrame(frame);
int statusBarHeight = frame.top;
int width = getScreenWidth(activity);
int height = getScreenHeight(activity);
Bitmap bp = null;
bp = Bitmap.createBitmap(bmp, 0, statusBarHeight, width, height
- statusBarHeight);
view.destroyDrawingCache();
return bp;
}
}
package com.example;
import android.content.Context;
import android.content.res.TypedArray;
import android.util.AttributeSet;
import android.util.TypedValue;
import android.view.MotionEvent;
import android.view.ViewGroup;
import android.widget.HorizontalScrollView;
import android.widget.LinearLayout;
import com.nineoldandroids.view.ViewHelper;
/**
* Created by tuhao-pc on 2015/12/28.
*/
public class SlidingMenu extends HorizontalScrollView{
private int mScreenWidth;
private int mMenuRightPadding;
private int mMenuWidth;
private int mHalfMenuWidth;
private boolean isOpen;
private boolean once;
private ViewGroup mMenu;
private ViewGroup mContent;
public SlidingMenu(Context context) {
this(context,null);
}
public SlidingMenu(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public SlidingMenu(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
mScreenWidth = ScreenUtils.getScreenWidth(context);
TypedArray a = context.getTheme().obtainStyledAttributes(attrs,R.styleable.SlidingMenu,defStyleAttr,0);
int count = a.getIndexCount();
for(int i = 0;i < count;i++){
int attr = a.getIndex(i);
switch (attr){
case R.styleable.SlidingMenu_rightPadding:{
// 默认是50
mMenuRightPadding = a.getDimensionPixelSize(attr, (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP,50f,getResources().getDisplayMetrics()));
break;
}
}
}
a.recycle();
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
/**
* 显示设置一个宽度
*/
if(!once){
LinearLayout wrapper = (LinearLayout) getChildAt(0);
mMenu = (ViewGroup) wrapper.getChildAt(0);
mContent = (ViewGroup) wrapper.getChildAt(1);
mMenuWidth = mScreenWidth - mMenuRightPadding;
mHalfMenuWidth = mMenuWidth/2;
mMenu.getLayoutParams().width = mMenuWidth;
mContent.getLayoutParams().width = mScreenWidth;
}
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
}
@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
super.onLayout(changed, l, t, r, b);
if(changed) {
// 将菜单隐藏
this.scrollTo(mMenuWidth, 0);
once = true;
}
}
@Override
public boolean onTouchEvent(MotionEvent ev) {
int action = ev.getAction();
switch (action){
// Up时，进行判断，如果显示区域大于菜单宽度一半则完全显示，否则隐藏
case MotionEvent.ACTION_UP:{
int scrollX = getScrollX();
if(scrollX > mHalfMenuWidth){
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;
}
/**
* 关闭菜单
*/
public void closeMenu()
{
if (isOpen)
{
this.smoothScrollTo(mMenuWidth, 0);
isOpen = false;
}
}
/**
* 切换菜单状态
*/
public void toggle()
{
if (isOpen)
{
closeMenu();
} else
{
openMenu();
}
}
@Override
protected void onScrollChanged(int l, int t, int oldl, int oldt)
{
super.onScrollChanged(l, t, oldl, oldt);
float scale = l * 1.0f / mMenuWidth;
float leftScale = 1 - 0.3f * scale;
float rightScale = 0.8f + scale * 0.2f;
ViewHelper.setScaleX(mMenu, leftScale);
ViewHelper.setScaleY(mMenu, leftScale);
ViewHelper.setAlpha(mMenu, 0.6f + 0.4f * (1 - scale));
ViewHelper.setTranslationX(mMenu, mMenuWidth * scale * 0.7f);
ViewHelper.setPivotX(mContent, 0);
ViewHelper.setPivotY(mContent, mContent.getHeight() / 2);
ViewHelper.setScaleX(mContent, rightScale);
ViewHelper.setScaleY(mContent, rightScale);
}
}
布局文件和资源文件（xml）
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tu = "http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent">
<com.example.SlidingMenu
android:id="@+id/id_menu"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@mipmap/img_frame_background"
tu:rightPadding="20dp">
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:orientation="horizontal" >
<include layout="@layout/layout_menu" />
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="@mipmap/qq" >
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="toggleMenu"
android:text="切换菜单" />
</LinearLayout>
</LinearLayout>
</com.example.SlidingMenu>
</LinearLayout>
<?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="#0000" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:orientation="vertical" >
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<ImageView
android:id="@+id/one"
android:layout_width="50dp"
android:layout_height="50dp"
android:layout_centerVertical="true"
android:layout_marginLeft="20dp"
android:layout_marginTop="20dp"
android:src="@mipmap/img_1" />
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_marginLeft="20dp"
android:layout_toRightOf="@id/one"
android:text="第1个Item"
android:textColor="#f0f0f0"
android:textSize="20sp" />
</RelativeLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<ImageView
android:id="@+id/two"
android:layout_width="50dp"
android:layout_height="50dp"
android:layout_centerVertical="true"
android:layout_marginLeft="20dp"
android:layout_marginTop="20dp"
android:src="@mipmap/img_2" />
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_marginLeft="20dp"
android:layout_toRightOf="@id/two"
android:text="第2个Item"
android:textColor="#f0f0f0"
android:textSize="20sp" />
</RelativeLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<ImageView
android:id="@+id/three"
android:layout_width="50dp"
android:layout_height="50dp"
android:layout_centerVertical="true"
android:layout_marginLeft="20dp"
android:layout_marginTop="20dp"
android:src="@mipmap/img_3" />
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_marginLeft="20dp"
android:layout_toRightOf="@id/three"
android:text="第3个Item"
android:textColor="#f0f0f0"
android:textSize="20sp" />
</RelativeLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<ImageView
android:id="@+id/four"
android:layout_width="50dp"
android:layout_height="50dp"
android:layout_centerVertical="true"
android:layout_marginLeft="20dp"
android:layout_marginTop="20dp"
android:src="@mipmap/img_4" />
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_marginLeft="20dp"
android:layout_toRightOf="@id/four"
android:text="第一个Item"
android:textColor="#f0f0f0"
android:textSize="20sp" />
</RelativeLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<ImageView
android:id="@+id/five"
android:layout_width="50dp"
android:layout_height="50dp"
android:layout_centerVertical="true"
android:layout_marginLeft="20dp"
android:layout_marginTop="20dp"
android:src="@mipmap/img_5" />
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_marginLeft="20dp"
android:layout_toRightOf="@id/five"
android:text="第5个Item"
android:textColor="#f0f0f0"
android:textSize="20sp" />
</RelativeLayout>
</LinearLayout>
</RelativeLayout>
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