下拉篩選控件

簡單實現效果相似如上的美團篩選功能。
實現思路以下：根據外層傳遞進來的list建立頂部下拉條目的個數，並設置按鈕互斥，選中樣式。下面彈出的篩選列表經過addView的方式添加，增長裏面佈局的靈活性。能夠添加一些篩選列表的彈出動畫以增長交互。

簡單實現代碼以下：
單個選中控件的實現：

import android.content.Context;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.LinearLayout;
import android.widget.TextView;

/**
 * 自定義的篩選器單個view，自處理選中效果，拋出點擊事件處理
 * Created by ZRP on 2015/9/19.
 */
public class FilterTabView extends LinearLayout implements View.OnClickListener {

    private View view;
    private TextView text;

    private boolean isChecked;

    public FilterTabView(Context context) {
        super(context);
        init();
    }

    public FilterTabView(Context context, AttributeSet attrs) {
        super(context, attrs);
        init();
    }

    private void init() {
        View inflate = LayoutInflater.from(getContext()).inflate(R.layout.custom_filter_tabview, this);
        inflate.setOnClickListener(this);

        view = inflate.findViewById(R.id.view);
        text = (TextView) inflate.findViewById(R.id.text);
    }

    public TextView getText() {
        return text;
    }

    public void setText(String txt) {
        text.setText(txt);
    }

    public void setChecked(boolean isChecked) {
        this.isChecked = isChecked;
        view.setSelected(isChecked);
    }

    public boolean isChecked() {
        return isChecked;
    }

    private OnClickListener clickListener;

    public void setOnClickListener(OnClickListener clickListener) {
        this.clickListener = clickListener;
    }

    @Override
    public void onClick(View view) {
        if (clickListener != null) clickListener.onClick(this);
    }

    public interface OnClickListener {
        void onClick(FilterTabView tabView);
    }
}

以上該view的佈局代碼以下：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal">

    <LinearLayout
        android:id="@+id/view"
        android:layout_width="0dp"
        android:layout_height="match_parent"
        android:layout_weight="1"
        android:background="@drawable/filter_tab_selector"
        android:gravity="center">

        <TextView
            android:id="@+id/text"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="工做地點"
            android:textColor="#333333"
            android:textSize="13sp" />

        <ImageView
            android:id="@+id/image"
            android:layout_width="12dp"
            android:layout_height="12dp"
            android:layout_marginLeft="13dp"
            android:src="@drawable/filter_image" />
    </LinearLayout>
</LinearLayout>

整條篩選控件的實現：

import android.content.Context;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.LinearLayout;
import java.util.ArrayList;

/**
 * 篩選器，自處理選中效果切換，拋出子view點擊事件處理
 * Created by ZRP on 2015/9/19.
 */
public class ExpandTabView extends LinearLayout implements FilterTabView.OnClickListener {

    private FilterTabView selectedView;
    private LinearLayout tab_container, container, view_container;

    private ArrayList<FilterTabView> tabViews = new ArrayList<FilterTabView>();//存儲動態建立的tab
    private int position = -1;//當前點擊的view爲list中的position

    public ExpandTabView(Context context) {
        super(context);
        init();
    }

    public ExpandTabView(Context context, AttributeSet attrs) {
        super(context, attrs);
        init();
    }

    private void init() {
        View inflate = LayoutInflater.from(getContext()).inflate(R.layout.custom_expand_tabview, this);
        tab_container = (LinearLayout) inflate.findViewById(R.id.tab_container);
        container = (LinearLayout) inflate.findViewById(R.id.container);
        view_container = (LinearLayout) inflate.findViewById(R.id.view_container);
        container.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View view) {
                closeExpand();// 清空全部選中效果，並重置各狀態值
            }
        });
    }

    public void setNameList(ArrayList<String> nameList) {
        if (nameList == null) return;

        LinearLayout.LayoutParams tabParams = new LayoutParams(0, ViewGroup.LayoutParams.MATCH_PARENT, 1);
        LinearLayout.LayoutParams lineParams = new LayoutParams(1, ViewGroup.LayoutParams.MATCH_PARENT);
        for (int i = 0; i < nameList.size(); i++) {
            // 建立tab
            FilterTabView tabView = new FilterTabView(getContext());
            tabView.setText(nameList.get(i));
            tabView.setOnClickListener(this);
            tabViews.add(tabView);
            tabView.setLayoutParams(tabParams);
            tab_container.addView(tabView);

            // 建立line
            if (i < nameList.size() - 1) {
                View line = new View(getContext());
                line.setBackgroundColor(getResources().getColor(R.color.fengexian_gray));
                line.setLayoutParams(lineParams);
                tab_container.addView(line);
            }
        }
    }

    /**
     * 添加expand展示佈局
     *
     * @param expandView
     */
    public void setExpandView(View expandView) {
        if (expandView == null) return;
        container.setVisibility(View.VISIBLE);
        view_container.removeAllViews();
        view_container.addView(expandView);
    }

    /**
     * 清除expand展示佈局並讓其消失
     */
    private void clearExpandView() {
        container.setVisibility(View.GONE);
        view_container.removeAllViews();
    }

    /**
     * 外部調用，清除展示的佈局，並取消全部tab的選中效果
     */
    public void closeExpand() {
        position = -1;
        selectedView = null;
        clearExpandView();
        if (tabViews == null || tabViews.size() == 0) return;
        for (int i = 0; i < tabViews.size(); i++) {
            tabViews.get(i).setChecked(false);
        }
    }

    @Override
    public void onClick(FilterTabView tabView) {
        FilterTabView[] views = tabViews.toArray(new FilterTabView[tabViews.size()]);

        // 選中的position
        for (int i = 0; i < views.length; i++) {
            if (tabView == views[i]) position = i;
        }

        if (selectedView == null) {
            tabView.setChecked(true);
            selectedView = tabView;
            if (listener != null) listener.onSelected(tabView, position, true);
        } else {
            if (selectedView == tabView) {
                selectedView.setChecked(false);
                clearExpandView();
                selectedView = null;
                if (listener != null) listener.onSelected(tabView, position, false);
            } else {
                for (int i = 0; i < views.length; i++) {
                    views[i].setChecked(views[i] == tabView);
                }
                clearExpandView();
                selectedView = tabView;
                if (listener != null) listener.onSelected(tabView, position, true);
            }
        }
    }

    private OnFilterSelected listener;

    /**
     * 設置頂部tab選中回調
     *
     * @param listener
     */
    public void setOnFilterSelected(OnFilterSelected listener) {
        this.listener = listener;
    }

    public interface OnFilterSelected {

        /**
         * tab選中回調
         *
         * @param tabView     選中的tab
         * @param position    選中tab的position
         * @param singleCheck 是否爲單次選中，爲true的時候調出選擇view，爲false的時候隱藏選擇view
         */
        void onSelected(FilterTabView tabView, int position, boolean singleCheck);
    }
}

上面該view的佈局以下：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <LinearLayout
        android:id="@+id/tab_container"
        android:layout_width="match_parent"
        android:layout_height="50dp"
        android:orientation="horizontal" />

    <View
        android:layout_width="match_parent"
        android:layout_height="1px"
        android:background="@color/divider_color" />

    <LinearLayout
        android:id="@+id/container"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="#26000000"
        android:orientation="vertical"
        android:visibility="gone">

        <LinearLayout
            android:id="@+id/view_container"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:background="#ffffff"
            android:orientation="vertical" />
    </LinearLayout>

</LinearLayout>

使用的時候代碼以下：

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    expandTabView = (ExpandTabView) findViewById(R.id.expand_tabview);
    expandTabView.setOnFilterSelected(this);

    ArrayList<String> nameList = new ArrayList<>();
    nameList.add("性別");
    nameList.add("地點");
    expandTabView.setNameList(nameList);
}

@Override
    public void onSelected(FilterTabView tabView, int position, boolean singleCheck) {
        if (singleCheck) {
            if (position == 0) {
                expandTabView.setExpandView(genderFilterView());
            } else {
                expandTabView.setExpandView(buildingFilterView());
            }
        }
    }

如上。

源代碼地址

想一想本身的代碼這麼渣，頓時好方...