Android ExpandMenu 多級菜單

前言 ，諸如壹號店、同城、去哪等一系列O2O越來越火，他們的應用多級搜索 很是……

1，結構分析

首先，我們給出這個下來菜單需要的組建。我們用線框圖來分析。

1）如上圖所示，最外圍的是一個Activity，頂部包含了一個View的容器，這個容器主要是裝載ToggleButton來實現諸如美團裏面的“美食，全城，理我最近，刷選”這一行。這一行一點就會彈出對應的下來菜單。

2）下拉菜單是如何實現的呢？，這裏我們利用了PopupWindow來實現這一彈出式窗口。然後我們在彈出式窗口裏面再定義我們的下來列表項，是單列還是二級菜單，都是由裏面來定。

3）不同的菜單，需要一級或者需要二級，在這裏根據我的需求而變動。我們在PopupWindow上面加一個自定義的LeftView，或者是MiddleView，RightView。主要是一個ToggleButton，你彈出一個窗口，你就定製一個窗口。

3）視圖裏面嵌入ListView，就形成了列表項。

好分析就到上面爲止，接下來我們一步步的說明實現。

2，項目結構

本項目的項目結構如圖所示：

1） Adapter。適配器，主要是爲ListView提供數據適配的。

2）MainActivity。主活動頁面。

3）ExpandTabView。本項目的核心類，它包含ToggleButton容器和PopupWindow，是控制彈出窗口的核心類。

4）ViewLeft,ViewMiddle,ViewRight。是彈出裏面嵌套的類，實現不同的列表菜單。

3，MainActivity

承載所有元素。看代碼比看文字實在。

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("距離");
        mTextArray.add("區域");
        mTextArray.add("距離");
        expandTabView.setValue(mTextArray, mViewArray);//將三個下拉列表設置進去
        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

最主要就是如何處理當我們點擊這些ToggleButton的時候要彈出或者收起這些PopupWindow。

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;

/**
 * 菜單控件頭部，封裝了下拉動畫，動態生成頭部按鈕個數
 *
 * @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);
    }

    /**
     * 根據選擇的位置設置tabitem顯示的值
     */
    public void setTitle(String valueText, int position) {
        if (position < mToggleButton.size()) {
            mToggleButton.get(position).setText(valueText);
        }
    }

    public void setTitle(String title){

    }
    /**
     * 根據選擇的位置獲取tabitem顯示的值
     */
    public String getTitle(int position) {
        if (position < mToggleButton.size() && mToggleButton.get(position).getText() != null) {
            return mToggleButton.get(position).getText().toString();
        }
        return "";
    }

    /**
     * 設置tabitem的個數和初始值
     * @param textArray 標題數組
     * @param viewArray 控件數組
     */
    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);
    }

    /**
     * 如果菜單成展開狀態，則讓菜單收回去
     */
    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;

    /**
     * 設置tabitem的點擊監聽事件
     */
    public void setOnButtonClickListener(OnButtonClickListener l) {
        mOnButtonClickListener = l;
    }

    /**
     * 自定義tabitem點擊回調接口
     */
    public interface OnButtonClickListener {
        public void onClick(int selectPosition);
    }

}

5，ViewLeft

其中的一個示例，其他兩個就不列舉了

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" };//顯示字段
    private final String[] itemsVaule = new String[] { "1", "2", "3", "4", "5", "6" };//隱藏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() {

    }


}