Android实现底部弹出列表选择器

在大多数app中都会有选择器，而现在比较流行的选择器除了仿ios的三级联动城市滚动选择以外，还有就是单个选择器，类似于android中的PopWindow弹出选择。
下面就是我在项目中使用到的一个关于运输方式选择的一个选择器，供大家，包括我家猫猫，嘿嘿，参考使用。

视图如下：

首先，在android中是没有这个控件的，所以我们要自定义视图，代码如下：

package com.fastlogistical.view;import android.app.Dialog;import android.content.Context;import android.graphics.Color;import android.view.Display;import android.view.Gravity;import android.view.LayoutInflater;import android.view.View;import android.view.View.OnClickListener;import android.view.Window;import android.view.WindowManager;import android.widget.LinearLayout;import android.widget.LinearLayout.LayoutParams;import android.widget.ScrollView;import android.widget.TextView;import com.fastlogistical.R;import java.util.ArrayList;import java.util.List;/** * 自定义弹出菜单视图类 */public class ActionSheetDialog {    private Context context;    private Dialog dialog;    private TextView txt_title;    private TextView txt_cancel;    private LinearLayout lLayout_content;    private ScrollView sLayout_content;    private boolean showTitle = false;    private List sheetItemList;    private Display display;    public ActionSheetDialog(Context context) {        this.context = context;        WindowManager windowManager = (WindowManager) context                .getSystemService(Context.WINDOW_SERVICE);        display = windowManager.getDefaultDisplay();    }    public ActionSheetDialog builder() {        View view = LayoutInflater.from(context).inflate(                R.layout.view_actionsheet, null);        view.setMinimumWidth(display.getWidth());        sLayout_content = (ScrollView) view.findViewById(R.id.sLayout_content);        lLayout_content = (LinearLayout) view                .findViewById(R.id.lLayout_content);        txt_title = (TextView) view.findViewById(R.id.txt_title);        txt_cancel = (TextView) view.findViewById(R.id.txt_cancel);        txt_cancel.setOnClickListener(new OnClickListener() {            @Override            public void onClick(View v) {                dialog.dismiss();            }        });        dialog = new Dialog(context, R.style.ActionSheetDialogStyle);        dialog.setContentView(view);        Window dialogWindow = dialog.getWindow();        dialogWindow.setGravity(Gravity.LEFT | Gravity.BOTTOM);        WindowManager.LayoutParams lp = dialogWindow.getAttributes();        lp.x = 0;        lp.y = 0;        dialogWindow.setAttributes(lp);        return this;    }    public ActionSheetDialog setTitle(String title) {        showTitle = true;        txt_title.setVisibility(View.VISIBLE);        txt_title.setText(title);        return this;    }    public ActionSheetDialog setCancelable(boolean cancel) {        dialog.setCancelable(cancel);        return this;    }    public ActionSheetDialog setCanceledOnTouchOutside(boolean cancel) {        dialog.setCanceledOnTouchOutside(cancel);        return this;    }    public ActionSheetDialog addSheetItem(String strItem, SheetItemColor color,            OnSheetItemClickListener listener) {        if (sheetItemList == null) {            sheetItemList = new ArrayList();        }        sheetItemList.add(new SheetItem(strItem, color, listener));        return this;    }    private void setSheetItems() {        if (sheetItemList == null || sheetItemList.size() <= 0) {            return;        }        int size = sheetItemList.size();        if (size >= 7) {            LayoutParams params = (LayoutParams) sLayout_content                    .getLayoutParams();            params.height = display.getHeight() / 2;            sLayout_content.setLayoutParams(params);        }        for (int i = 1; i <= size; i++) {            final int index = i;            SheetItem sheetItem = sheetItemList.get(i - 1);            String strItem = sheetItem.name;            SheetItemColor color = sheetItem.color;            final OnSheetItemClickListener listener = (OnSheetItemClickListener) sheetItem.itemClickListener;            TextView textView = new TextView(context);            textView.setText(strItem);            textView.setTextSize(18);            textView.setGravity(Gravity.CENTER);            if (size == 1) {                if (showTitle) {                    textView.setBackgroundResource(R.drawable.actionsheet_bottom_selector);                } else {                    textView.setBackgroundResource(R.drawable.actionsheet_single_selector);                }            } else {                if (showTitle) {                    if (i >= 1 && i < size) {                        textView.setBackgroundResource(R.drawable.actionsheet_middle_selector);                    } else {                        textView.setBackgroundResource(R.drawable.actionsheet_bottom_selector);                    }                } else {                    if (i == 1) {                        textView.setBackgroundResource(R.drawable.actionsheet_top_selector);                    } else if (i < size) {                        textView.setBackgroundResource(R.drawable.actionsheet_middle_selector);                    } else {                        textView.setBackgroundResource(R.drawable.actionsheet_bottom_selector);                    }                }            }            if (color == null) {                textView.setTextColor(Color.parseColor(SheetItemColor.Blue                        .getName()));            } else {                textView.setTextColor(Color.parseColor(color.getName()));            }            float scale = context.getResources().getDisplayMetrics().density;            int height = (int) (45 * scale + 0.5f);            textView.setLayoutParams(new LayoutParams(                    LayoutParams.MATCH_PARENT, height));            textView.setOnClickListener(new OnClickListener() {                @Override                public void onClick(View v) {                    listener.onClick(index);                    dialog.dismiss();                }            });            lLayout_content.addView(textView);        }    }    public void show() {        setSheetItems();        dialog.show();    }    public interface OnSheetItemClickListener {        void onClick(int which);    }    public class SheetItem {        String name;        OnSheetItemClickListener itemClickListener;        SheetItemColor color;        public SheetItem(String name, SheetItemColor color,                OnSheetItemClickListener itemClickListener) {            this.name = name;            this.color = color;            this.itemClickListener = itemClickListener;        }    }    public enum SheetItemColor {        Blue("#037BFF"), Red("#FD4A2E");        private String name;        private SheetItemColor(String name) {            this.name = name;        }        public String getName() {            return name;        }        public void setName(String name) {            this.name = name;        }    }}

自定义视图布局如下：

<?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="wrap_content"    android:orientation="vertical"    android:padding="8dp" >    <TextView        android:id="@+id/txt_title"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:background="@drawable/actionsheet_top_normal"        android:gravity="center"        android:minHeight="45dp"        android:paddingTop="10dp"        android:paddingBottom="10dp"        android:paddingLeft="15dp"        android:paddingRight="15dp"        android:textColor="@color/actionsheet_gray"        android:textSize="13sp"        android:visibility="gone" />    <ScrollView        android:id="@+id/sLayout_content"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:fadingEdge="none"         >        <LinearLayout            android:id="@+id/lLayout_content"            android:layout_width="match_parent"            android:layout_height="wrap_content"            android:orientation="vertical" >        LinearLayout>    ScrollView>    <TextView        android:id="@+id/txt_cancel"        android:layout_width="match_parent"        android:layout_height="45dp"        android:layout_marginTop="8dp"        android:background="@drawable/actionsheet_single_selector"        android:gravity="center"        android:text="取消"        android:textColor="@color/actionsheet_blue"        android:textSize="18sp"        android:textStyle="bold" />LinearLayout>

每一个item的选择器：

<?xml version="1.0" encoding="utf-8"?><selector xmlns:android="http://schemas.android.com/apk/res/android">    <item android:drawable="@drawable/actionsheet_bottom_pressed" android:state_pressed="true"/>    <item android:drawable="@drawable/actionsheet_bottom_normal"/>selector>

那么，当弹出的视图完成后，就来看下在Activity中怎样调用这个视图，并添加相关内容：

package com.fastlogistical.activity;import android.view.View;import android.widget.Button;import android.widget.Toast;import com.fastlogistical.R;import com.fastlogistical.view.ActionSheetDialog;/** *  *    Company:  xxx *    Author :  wujie *    Time   :  2016/12/19 8:56 *    Usage  : *    desc   : *    other  : * 
 */public class PopActivity extends BaseActivity{    private Button pop_btn;    @Override    protected void initView() {        setContentView(R.layout.pop_activity);        pop_btn= (Button) findViewById(R.id.pop_btn);    }    @Override    protected void initListener() {        pop_btn.setOnClickListener(this);    }    @Override    protected void initData() {    }    @Override    public void onClick(View v) {switch (v.getId()){    case R.id.pop_btn:        new ActionSheetDialog(PopActivity.this)                .builder()                .setTitle("选择运输方式")                .setCancelable(true)                .setCanceledOnTouchOutside(true)                .addSheetItem("汽运", ActionSheetDialog.SheetItemColor.Blue                        , new ActionSheetDialog.OnSheetItemClickListener() {                            @Override                            public void onClick(int which) {                                //填写事件                                Toast.makeText(PopActivity.this, "选择了汽运", Toast.LENGTH_SHORT).show();                            }                        })                .addSheetItem("铁路", ActionSheetDialog.SheetItemColor.Blue                        , new ActionSheetDialog.OnSheetItemClickListener() {                            @Override                            public void onClick(int which) {                                //填写事件                                Toast.makeText(PopActivity.this, "选择了铁路", Toast.LENGTH_SHORT).show();                            }                        })                .addSheetItem("水路", ActionSheetDialog.SheetItemColor.Blue                        , new ActionSheetDialog.OnSheetItemClickListener() {                            @Override                            public void onClick(int which) {                                //填写事件                                Toast.makeText(PopActivity.this, "选择了水路", Toast.LENGTH_SHORT).show();                            }                        })                .addSheetItem("航运", ActionSheetDialog.SheetItemColor.Blue                        , new ActionSheetDialog.OnSheetItemClickListener() {                            @Override                            public void onClick(int which) {                                //填写事件                                Toast.makeText(PopActivity.this, "选择了航运", Toast.LENGTH_SHORT).show();                            }                        }).show();}    }}

注意：我在Activity中是继承的我自己封装的BaseActivity，大家在使用时可以用自己写的Activity，只要将关键的代码放入即可。

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