Android高手进阶教程(二十六)之---Android超仿Path菜单的功能实现！

hi~大家好，出来创业快3个月了，一切还不错，前一段时间用了业余时间搞了个问答类网站yqma.想做中国的*,哈哈，只是yy下，希望大家多多支持！

好了，今天给大家分享的是path菜单的简单实现，可以支持自定义方向(左上，右上，右下，左下)，并且可以自定义菜单的个数，难点就是菜单的摆放位置(动态设置margin)，还有动画的实现，其实动画只是简单用了个translateanimation，n个菜单一起移动的时候感觉很cool~

这里也用到了自定义标签，这里不懂的童鞋可以看我 android高手进阶教程(四)之----android 中自定义属性(attr.xml,typedarray)的使用! 这篇文章.好了废话不多说了，

首先创建一个android工程命名为pathtest.目录结构如下图:

第二步:在values文件夹下新建一个attrs.xml文件，代码如下:

<?xml version="1.0" encoding="utf-8"?> 
<resources> 
  <declare-styleable name="pathmenuview">  
    <attr name="position">  
      <enum name="left_top" value="0"></enum> 
      <enum name="right_top" value="1"></enum> 
      <enum name="right_bottom" value="2"></enum> 
      <enum name="left_bottom" value="3"></enum> 
    </attr> 
  </declare-styleable>  
</resources> 

第三步：新建一个pathmenuview.java这个就是我们自定义的path菜单控件，代码如下：

package com.tutor.path; 
 
import androidcontentcontext; 
import androidcontentrestypedarray; 
import androidutilattributeset; 
import androidviewgravity; 
import androidviewview; 
import androidviewviewgroup; 
import androidviewanimationanimation; 
import androidviewanimationanticipateinterpolator; 
import androidviewanimationovershootinterpolator; 
import androidviewanimationtranslateanimation; 
import androidwidgetframelayout; 
import androidwidgetimageview; 
 
 
/** 
 * @author frankiewei 
 * 超级仿path菜单 
 * position定义菜单的位置，目前支持：左上;右上;右下;左下四个方向。 
 * menuresids定义出现的菜单的资源id 
 */ 
public class pathmenuview extends framelayout { 
   
  private static final int left_top = 0; 
   
  private static final int right_top = 1; 
   
  private static final int right_bottom = 2; 
   
  private static final int left_bottom = 3; 
   
   
  /** 
   * 默认的位置是在右下角 
   */ 
  private int position = 3; 
   
  /** 
   * 那个圆形菜单 
   */ 
  private imageview mhome; 
   
  /** 
   * 上下文 
   */ 
  private context mcontext; 
   
   
  /** 
   * 设备的宽度 
   */ 
  private int mwidth = 0; 
   
  /** 
   * 设备的高度 
   */ 
  private int mheight = 0; 
   
  /** 
   * 设备的density 
   */ 
  private float mdensity; 
   
  /** 
   * 菜单是否显示 
   */ 
  private boolean bmenushow; 
   
  private static int xoffset   = 15; 
  private static int yoffset   = -13; 
   
  /** 
   * 菜单的资源个数 
   */ 
  private int[] menuresids = {rdrawablecomposer_camera,rdrawablecomposer_music, 
      rdrawablecomposer_sleep,rdrawablecomposer_music,rdrawablecomposer_place}; 
   
 
  public pathmenuview(context context){ 
    super(context); 
    setupviews(); 
  } 
   
  public pathmenuview(context context, attributeset attrs) { 
    super(context, attrs); 
    typedarray a = contextobtainstyledattributes(attrs,  
        rstyleablepathmenuview); 
     
    position = agetint(rstyleablepathmenuview_position,3); 
     
    arecycle(); 
    setupviews(); 
  } 
   
  private void setupviews(){ 
    mcontext = getcontext(); 
 
    mheight = mcontextgetresources()getdisplaymetrics()heightpixels; 
    mwidth = mcontextgetresources()getdisplaymetrics()widthpixels; 
    mdensity = mcontextgetresources()getdisplaymetrics()density; 
     
    xoffset = (int) (667 * mdensity); 
    yoffset = (int) (667 * mdensity); 
     
    mhome = new imageview(mcontext); 
     
    mhomesetimageresource(rdrawablecomposer_button); 
    mhomesetonclicklistener(listener); 
     
    addview(mhome); 
     
    layoutparams mhomeparams = (framelayoutlayoutparams)mhomegetlayoutparams(); 
    mhomeparamswidth = layoutparamswrap_content; 
    mhomeparamsheight = layoutparamswrap_content; 
     
    switch (position) { 
    case left_top: 
      mhomeparamsgravity = gravityleft | gravitytop; 
      for (int i = 0; i < menuresidslength; i++) { 
 
        int width_padding = mwidth / ((menuresidslength - 1) * 2); 
        int height_padding = mheight / ((menuresidslength - 1) * 2); 
 
        imageview imageview = new imageview(mcontext); 
        imageviewsetimageresource(menuresids[i]); 
        addview(imageview); 
        layoutparams params = (framelayoutlayoutparams) imageview 
            getlayoutparams(); 
        paramswidth = layoutparamswrap_content; 
        paramsheight = layoutparamswrap_content; 
        paramsleftmargin = mwidth / 2 
            - ((menuresidslength - i - 1) * width_padding); 
        paramstopmargin = mheight / 2 - i * height_padding; 
        paramsgravity = gravityleft | gravitytop; 
        imageviewsetlayoutparams(params); 
 
      } 
       
      break; 
    case right_top: 
      mhomeparamsgravity = gravityright | gravitytop; 
      for (int i = 0; i < menuresidslength; i++) { 
 
        int width_padding = mwidth / ((menuresidslength - 1) * 2); 
        int height_padding = mheight / ((menuresidslength - 1) * 2); 
 
        imageview imageview = new imageview(mcontext); 
        imageviewsetimageresource(menuresids[i]); 
        addview(imageview); 
        layoutparams params = (framelayoutlayoutparams) imageview 
            getlayoutparams(); 
        paramswidth = layoutparamswrap_content; 
        paramsheight = layoutparamswrap_content; 
        paramsrightmargin = mwidth / 2 
            - ((menuresidslength - i - 1) * width_padding); 
        paramstopmargin = mheight / 2 - i * height_padding; 
        paramsgravity = gravityright | gravitytop; 
        imageviewsetlayoutparams(params); 
 
      } 
      break; 
    case right_bottom: 
      mhomeparamsgravity = gravityright | gravitybottom; 
      for (int i = 0; i < menuresidslength; i++) { 
 
        int width_padding = mwidth / ((menuresidslength - 1) * 2); 
        int height_padding = mheight / ((menuresidslength - 1) * 2); 
 
        imageview imageview = new imageview(mcontext); 
        imageviewsetimageresource(menuresids[i]); 
        addview(imageview); 
        layoutparams params = (framelayoutlayoutparams) imageview 
            getlayoutparams(); 
        paramswidth = layoutparamswrap_content; 
        paramsheight = layoutparamswrap_content; 
        paramsrightmargin = mwidth / 2 
            - ((menuresidslength - i - 1) * width_padding); 
        paramsbottommargin = mheight / 2 - i * height_padding; 
        paramsgravity = gravityright | gravitybottom; 
        imageviewsetlayoutparams(params); 
 
      } 
      break; 
    case left_bottom: 
      mhomeparamsgravity = gravityleft | gravitybottom; 
      for(int i = 0; i < menuresidslength; i++){ 
         
        int width_padding = mwidth / ((menuresidslength - 1) * 2); 
        int height_padding = mheight / ((menuresidslength -1) * 2); 
         
        imageview imageview = new imageview(mcontext); 
        imageviewsetimageresource(menuresids[i]); 
        addview(imageview); 
        layoutparams params = (framelayoutlayoutparams)imageviewgetlayoutparams(); 
        paramswidth = layoutparamswrap_content; 
        paramsheight = layoutparamswrap_content;      
        paramsleftmargin = mwidth / 2 - ((menuresidslength - i - 1) * width_padding); 
        paramsbottommargin = mheight / 2 - i * height_padding; 
        paramsgravity = gravityleft | gravitybottom; 
        imageviewsetlayoutparams(params);            
      } 
      break; 
    default: 
        break; 
    }   
     
    mhomesetlayoutparams(mhomeparams);    
  } 
   
  private onclicklistener listener = new onclicklistener() { 
     
    public void onclick(view v) { 
      if (!bmenushow) { 
        startanimationin(pathmenuviewthis, 300); 
      } else { 
        startanimationout(pathmenuviewthis, 300); 
      } 
      bmenushow = !bmenushow; 
    } 
  }; 
   
   
  /** 
   * 菜单隐藏动画 
   * 
   * @param group 
   * @param duration 
   */ 
  private void startanimationin(viewgroup group, int duration) { 
    for (int i = 1; i < groupgetchildcount(); i++) { 
      imageview imageview = (imageview) groupgetchildat(i); 
      imageviewsetvisibility(0); 
      marginlayoutparams mlp = (marginlayoutparams) imageview 
          getlayoutparams(); 
       
       
      animation animation = null; 
       
       
      switch (position) { 
      case left_top: 
        animation = new translateanimation(0f,-mlpleftmargin+xoffset,0f,-mlptopmargin + yoffset); 
        break; 
      case right_top: 
        animation = new translateanimation(mlprightmargin - xoffset,0f,-mlptopmargin + yoffset,0f); 
        break;      
      case left_bottom: 
        animation = new translateanimation(0f, -mlpleftmargin+ xoffset, 0f, -yoffset + mlpbottommargin); 
        break; 
         
      case right_bottom: 
        animation = new translateanimation(mlprightmargin-xoffset,0f,-yoffset + mlpbottommargin, 0f); 
        break; 
      default: 
        break; 
      } 
 
      animationsetfillafter(true); 
      animationsetduration(duration); 
      animationsetstartoffset((i * 100) / (-1 + groupgetchildcount())); 
      animationsetinterpolator(new overshootinterpolator(2f)); 
      imageviewstartanimation(animation); 
 
    } 
  } 
   
  /** 
   * 菜单显示动画 
   * 
   * @param group 
   * @param duration 
   */ 
  private void startanimationout(viewgroup group,int duration){ 
    for (int i = 1; i < groupgetchildcount(); i++) { 
      final imageview imageview = (imageview) group 
          getchildat(i); 
      marginlayoutparams mlp = (marginlayoutparams) imageviewgetlayoutparams(); 
       
      animation animation = null; 
       
      switch (position) { 
      case left_top: 
        animation = new translateanimation(-mlpleftmargin+xoffset,0f,-mlptopmargin + yoffset,0f); 
        break; 
      case right_top: 
        animation = new translateanimation(0f,mlprightmargin - xoffset,0f,-mlptopmargin + yoffset); 
        break; 
 
      case left_bottom: 
        animation = new translateanimation(-mlpleftmargin+xoffset,0f, -yoffset + mlpbottommargin,0f); 
        break; 
 
      case right_bottom: 
        animation = new translateanimation(0f,mlprightmargin-xoffset, 0f,-yoffset + mlpbottommargin); 
        break; 
      default: 
        break; 
      } 
       
      animationsetfillafter(true);animationsetduration(duration); 
      animationsetstartoffset(((groupgetchildcount()-i) * 100) 
          / (-1 + groupgetchildcount())); 
      animationsetinterpolator(new anticipateinterpolator(2f)); 
      imageviewstartanimation(animation); 
    } 
  } 
 
} 

第四步:pathtestactivity.java以及用到的布局文件main.xml代码如下：

pathtestactivity.java(基本没修改代码)代码如下:

package comtutorpath; 
 
import androidappactivity; 
import androidosbundle; 
 
public class pathtestactivity extends activity { 
 
  @override 
  public void oncreate(bundle savedinstancestate) { 
    superoncreate(savedinstancestate); 
    setcontentview(rlayoutmain);   
  } 
} 

main.xml代码如下:

<?xml version="0" encoding="utf-8"?> 
<linearlayout xmlns:android="http://schemasandroidcom/apk/res/android" 
  xmlns:tutor="http://schemasandroidcom/apk/res/comtutorpath" 
  android:layout_width="fill_parent" 
  android:layout_height="fill_parent" 
  android:orientation="vertical" > 
 
  <comtutorpathpathmenuview 
    android:id="@+id/text" 
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent" 
    tutor:position="right_bottom" 
     /> 
 
</linearlayout> 

运行点击效果如下:

图1：默认是在右下方这里menuresids定义了五个菜单              

图2：点击红色菜单，菜单收回.

下面我们修改main.xml的tutor属性为left_bottom,并且修改pathmenuview.java中的menuresids.

tutor:position="left_bottom" 

效果如下:

图3：自定义在左下角，六个菜单。

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。