【ExpandTabView】Android 仿大众，美团下拉菜单ExpandTabView

原文地址：https://github.com/yueyueniao2012/ExpandTabView

参考地址：http://blog.csdn.net/minimicall/article/details/39484493

我们在常用的电商或者旅游APP中，例如美团，手机淘宝等等，都能够看的到有那种下拉式的二级列表菜单。具体如图所示：





上面两张图就是美团的一个二级列表菜单的一个展示。我相信很多人都想开发一个跟它一样的功能放到自己的APP中。好，接下来我们就开始动手，解决它。

1，结构分析

首先，我们给出这个下来菜单需要的组建。我们用线框图来分析。



1）如上图所示，最外围的是一个Activity，顶部包含了一个View的容器，这个容器主要是装载ToggleButton来实现诸如美团里面的“美食，全城，离我最近，筛选”这一行。这一行一点就会弹出对应的下来菜单。

2）下拉菜单是如何实现的呢？，这里我们利用了PopupWindow来实现这一弹出式窗口。然后我们在弹出式窗口里面再定义我们的下来列表项，是单列还是二级菜单，都是由里面来定。

3）不同的菜单，需要一级或者需要二级，在这里根据我的需求而变动。我们在PopupWindow上面加一个自定义的LeftView，或者是MiddleView，RightView。主要是一个ToggleButton，你弹出一个窗口，你就定制一个窗口。

3）视图里面嵌入ListView，就形成了列表项。

好分析就到上面为止，接下来我们一步步的说明实现。

2，项目结构

本项目的项目结构如图所示：

1） Adapter。适配器，主要是为ListView提供数据适配的。

2）MainActivity。主活动页面。

3）ExpandTabView。本项目的核心类，它包含ToggleButton容器和PopupWindow，是控制弹出窗口的核心类。

4）ViewLeft,ViewMiddle,ViewRight。是弹出里面嵌套的类，实现不同的列表菜单。

3，MainActivity

承载所有元素。看代码比看文字实在。

[java] view
plain copy







package com.example.expandtabview;

import java.util.ArrayList;

import android.app.Activity;

import android.os.Bundle;

import android.util.Log;

import android.view.View;

import android.widget.Toast;

import com.example.view.ExpandTabView;

import com.example.view.ViewLeft;

import com.example.view.ViewMiddle;

import com.example.view.ViewRight;

public class MainActivity extends Activity {

private static final String TAG = "MainActivity";

private ExpandTabView expandTabView;

private ArrayList<View> mViewArray = new ArrayList<View>();

private ViewLeft viewLeft;

private ViewMiddle viewMiddle;

private ViewRight viewRight;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

initView();

initVaule();

initListener();

}

private void initView() {

Log.d(TAG,"initView");

expandTabView = (ExpandTabView) findViewById(R.id.expandtab_view);

viewLeft = new ViewLeft(this);

viewMiddle = new ViewMiddle(this);

viewRight = new ViewRight(this);

}

private void initVaule() {

Log.d(TAG,"initValue");

mViewArray.add(viewLeft);

mViewArray.add(viewMiddle);

mViewArray.add(viewRight);

ArrayList<String> mTextArray = new ArrayList<String>();

mTextArray.add("距离");

mTextArray.add("区域");

mTextArray.add("距离");

expandTabView.setValue(mTextArray, mViewArray);//将三个下拉列表设置进去

expandTabView.setTitle(viewLeft.getShowText(), 0);

expandTabView.setTitle(viewMiddle.getShowText(), 1);

expandTabView.setTitle(viewRight.getShowText(), 2);

}

private void initListener() {

Log.d(TAG,"initListener");

viewLeft.setOnSelectListener(new ViewLeft.OnSelectListener() {

@Override

public void getValue(String distance, String showText) {

Log.d("ViewLeft", "OnSelectListener, getValue");

onRefresh(viewLeft, showText);

}

});

viewMiddle.setOnSelectListener(new ViewMiddle.OnSelectListener() {

@Override

public void getValue(String showText) {

Log.d("ViewMiddle","OnSelectListener, getValue");

onRefresh(viewMiddle,showText);

}

});

viewRight.setOnSelectListener(new ViewRight.OnSelectListener() {

@Override

public void getValue(String distance, String showText) {

Log.d("ViewRight","OnSelectListener, getValue");

onRefresh(viewRight, showText);

}

});

}

private void onRefresh(View view, String showText) {

Log.d(TAG,"onRefresh,view:"+view+",showText:"+showText);

expandTabView.onPressBack();

int position = getPositon(view);

if (position >= 0 && !expandTabView.getTitle(position).equals(showText)) {

expandTabView.setTitle(showText, position);

}

Toast.makeText(MainActivity.this, showText, Toast.LENGTH_SHORT).show();

}

private int getPositon(View tView) {

Log.d(TAG,"getPosition");

for (int i = 0; i < mViewArray.size(); i++) {

if (mViewArray.get(i) == tView) {

return i;

}

}

return -1;

}

@Override

public void onBackPressed() {

if (!expandTabView.onPressBack()) {

finish();

}

}

}

4 ，ExpandTabView

最主要就是如何处理当我们点击这些ToggleButton的时候要弹出或者收起这些PopupWindow。

[java] view
plain copy







package com.example.view;

import java.util.ArrayList;

import com.example.expandtabview.R;

import android.app.Activity;

import android.content.Context;

import android.util.AttributeSet;

import android.util.Log;

import android.view.LayoutInflater;

import android.view.View;

import android.widget.LinearLayout;

import android.widget.PopupWindow;

import android.widget.PopupWindow.OnDismissListener;

import android.widget.RelativeLayout;

import android.widget.TextView;

import android.widget.ToggleButton;

/**

* 菜单控件头部，封装了下拉动画，动态生成头部按钮个数

*

* @author zengjinlong

*/

public class ExpandTabView extends LinearLayout implements OnDismissListener {

private static final String TAG = "ExpandTabView";

private ToggleButton selectedButton;

private ArrayList<String> mTextArray = new ArrayList<String>();

private ArrayList<RelativeLayout> mViewArray = new ArrayList<RelativeLayout>();

private ArrayList<ToggleButton> mToggleButton = new ArrayList<ToggleButton>();

private Context mContext;

private final int SMALL = 0;

private int displayWidth;

private int displayHeight;

private PopupWindow popupWindow;

private int selectPosition;

public ExpandTabView(Context context) {

super(context);

init(context);

}

public ExpandTabView(Context context, AttributeSet attrs) {

super(context, attrs);

init(context);

}

/**

* 根据选择的位置设置tabitem显示的值

*/

public void setTitle(String valueText, int position) {

if (position < mToggleButton.size()) {

mToggleButton.get(position).setText(valueText);

}

}

public void setTitle(String title){

}

/**

* 根据选择的位置获取tabitem显示的值

*/

public String getTitle(int position) {

if (position < mToggleButton.size() && mToggleButton.get(position).getText() != null) {

return mToggleButton.get(position).getText().toString();

}

return "";

}

/**

* 设置tabitem的个数和初始值

* @param textArray 标题数组

* @param viewArray 控件数组

*/

public void setValue(ArrayList<String> textArray, ArrayList<View> viewArray) {

if (mContext == null) {

return;

}

LayoutInflater inflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

Log.d(TAG,"setValue");

mTextArray = textArray;

for (int i = 0; i < viewArray.size(); i++) {

final RelativeLayout r = new RelativeLayout(mContext);

int maxHeight = (int) (displayHeight * 0.7);

RelativeLayout.LayoutParams rl = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT, maxHeight);

rl.leftMargin = 10;

rl.rightMargin = 10;

r.addView(viewArray.get(i), rl);

mViewArray.add(r);

r.setTag(SMALL);

ToggleButton tButton = (ToggleButton) inflater.inflate(R.layout.toggle_button, this, false);

addView(tButton);

View line = new TextView(mContext);

line.setBackgroundResource(R.drawable.choosebar_line);

if (i < viewArray.size() - 1) {

LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(2, LinearLayout.LayoutParams.MATCH_PARENT);

addView(line, lp);

}

mToggleButton.add(tButton);

tButton.setTag(i);

tButton.setText(mTextArray.get(i));

r.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View v) {

Log.d("RelativeLayout","view:"+v);

onPressBack();

}

});

r.setBackgroundColor(mContext.getResources().getColor(R.color.popup_main_background));

tButton.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View view) {

Log.d("tButton","setOnClickListener(l)");

// initPopupWindow();

ToggleButton tButton = (ToggleButton) view;

if (selectedButton != null && selectedButton != tButton) {

selectedButton.setChecked(false);

}

selectedButton = tButton;

selectPosition = (Integer) selectedButton.getTag();

startAnimation();

if (mOnButtonClickListener != null && tButton.isChecked()) {

mOnButtonClickListener.onClick(selectPosition);

}

}

});

}// for..

}

private void startAnimation() {

Log.d(TAG,"startAnimation");

if (popupWindow == null) {

Log.d(TAG,"startAnimation(),new popupWindow now");

popupWindow = new PopupWindow(mViewArray.get(selectPosition), displayWidth, displayHeight);

popupWindow.setAnimationStyle(R.style.PopupWindowAnimation);

popupWindow.setFocusable(false);

popupWindow.setOutsideTouchable(true);

}

Log.d(TAG,"startAnimation(),selectedButton:"+selectedButton+",isChecked:"+selectedButton.isChecked()+

",popupWindow.isShowing:"+popupWindow.isShowing());

if (selectedButton.isChecked()) {

if (!popupWindow.isShowing()) {

showPopup(selectPosition);

} else {

popupWindow.setOnDismissListener(this);

popupWindow.dismiss();

hideView();

}

} else {

if (popupWindow.isShowing()) {

popupWindow.dismiss();

hideView();

}

}

}

private void showPopup(int position) {

View tView = mViewArray.get(selectPosition).getChildAt(0);

if (tView instanceof ViewBaseAction) {

ViewBaseAction f = (ViewBaseAction) tView;

f.show();

}

if (popupWindow.getContentView() != mViewArray.get(position)) {

popupWindow.setContentView(mViewArray.get(position));

}

popupWindow.showAsDropDown(this, 0, 0);

}

/**

* 如果菜单成展开状态，则让菜单收回去

*/

public boolean onPressBack() {

Log.d(TAG,"onPressBack");

if (popupWindow != null && popupWindow.isShowing()) {

popupWindow.dismiss();

hideView();

if (selectedButton != null) {

selectedButton.setChecked(false);

}

return true;

} else {

return false;

}

}

private void hideView() {

Log.d(TAG, "hide()");

View tView = mViewArray.get(selectPosition).getChildAt(0);

if (tView instanceof ViewBaseAction) {

ViewBaseAction f = (ViewBaseAction) tView;

f.hide();

}

}

private void init(Context context) {

mContext = context;

displayWidth = ((Activity) mContext).getWindowManager().getDefaultDisplay().getWidth();

displayHeight = ((Activity) mContext).getWindowManager().getDefaultDisplay().getHeight();

setOrientation(LinearLayout.HORIZONTAL);

}

@Override

public void onDismiss() {

Log.d(TAG,"onDismiss,selectPosition:"+selectPosition);

showPopup(selectPosition);

popupWindow.setOnDismissListener(null);

}

private OnButtonClickListener mOnButtonClickListener;

/**

* 设置tabitem的点击监听事件

*/

public void setOnButtonClickListener(OnButtonClickListener l) {

mOnButtonClickListener = l;

}

/**

* 自定义tabitem点击回调接口

*/

public interface OnButtonClickListener {

public void onClick(int selectPosition);

}

}

5，ViewLeft

其中的一个示例，其他两个就不列举了

[java] view
plain copy







package com.example.view;

import com.example.adapter.TextAdapter;

import com.example.expandtabview.R;

import android.content.Context;

import android.util.AttributeSet;

import android.view.LayoutInflater;

import android.view.View;

import android.widget.ListView;

import android.widget.RelativeLayout;

import android.widget.Toast;

public class ViewLeft extends RelativeLayout implements ViewBaseAction{

private static final String TAG = "ViewLeft";

private ListView mListView;

private final String[] items = new String[] { "item1", "item2", "item3", "item4", "item5", "item6" };//显示字段

private final String[] itemsVaule = new String[] { "1", "2", "3", "4", "5", "6" };//隐藏id

private OnSelectListener mOnSelectListener;

private TextAdapter adapter;

private String mDistance;

private String showText = "item1";

private Context mContext;

public String getShowText() {

return showText;

}

public ViewLeft(Context context) {

super(context);

init(context);

}

public ViewLeft(Context context, AttributeSet attrs, int defStyle) {

super(context, attrs, defStyle);

init(context);

}

public ViewLeft(Context context, AttributeSet attrs) {

super(context, attrs);

init(context);

}

private void init(Context context) {

mContext = context;

LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

inflater.inflate(R.layout.view_distance, this, true);

setBackgroundDrawable(getResources().getDrawable(R.drawable.choosearea_bg_mid));

mListView = (ListView) findViewById(R.id.listView);

adapter = new TextAdapter(context, items, R.drawable.choose_item_right, R.drawable.choose_eara_item_selector);

adapter.setTextSize(17);

if (mDistance != null) {

for (int i = 0; i < itemsVaule.length; i++) {

if (itemsVaule[i].equals(mDistance)) {

adapter.setSelectedPositionNoNotify(i);

showText = items[i];

break;

}

}

}

mListView.setAdapter(adapter);

adapter.setOnItemClickListener(new TextAdapter.OnItemClickListener() {

@Override

public void onItemClick(View view, int position) {

if (mOnSelectListener != null) {

showText = items[position];

mOnSelectListener.getValue(itemsVaule[position], items[position]);

}

}

});

}

public void setOnSelectListener(OnSelectListener onSelectListener) {

mOnSelectListener = onSelectListener;

}

public interface OnSelectListener {

public void getValue(String distance, String showText);

}

@Override

public void hide() {

}

@Override

public void show() {

}

}

6，效果图

好，今天就到这里。。希望有用。

下载地址：http://download.csdn.net/detail/dodod2012/9594687