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

摘要：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stackoverflow,哈哈，只...

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stackoverflow,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:

Android高手进阶教程(二十六)之---Android超仿Path菜单的功能实现！1

第二步:在values文件夹下新建一个attrs.xml文件，代码如下:

<"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:

<" 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:

Android高手进阶教程(二十六)之---Android超仿Path菜单的功能实现！2