android实现下拉框和输入框结合

1、如何实现：将一个EditText和ListView+PopupWindow 结合起来。自定义一个EditText，在自定义控件中用PopupWindow实现弹出ListView，已达到想要的效果。

2、需要的布局： 1、EditText+ImageButton 的布局

2、ListView的布局

3、代码

EditText+ImageButton 的布局：

<?xml version="1.0" encoding="utf-8"?>

ListView的布局：

<?xml version="1.0" encoding="utf-8"?>

自定义控件java代码：

package com.wxcoming.wxcomingerp.custom.sptoedit;import android.content.Context;import android.content.res.TypedArray;import android.graphics.drawable.ColorDrawable;import android.support.annotation.AttrRes;import android.support.annotation.NonNull;import android.support.annotation.Nullable;import android.text.TextUtils;import android.text.TextWatcher;import android.util.AttributeSet;import android.util.Log;import android.view.LayoutInflater;import android.view.MotionEvent;import android.view.View;import android.view.ViewGroup;import android.widget.AdapterView;import android.widget.BaseAdapter;import android.widget.EditText;import android.widget.FrameLayout;import android.widget.ImageButton;import android.widget.ImageView;import android.widget.LinearLayout;import android.widget.ListView;import android.widget.PopupWindow;import com.wxcoming.wxcomingerp.R;/** * Created by adolph_jun on 2017/10/13. */public class CDropEditText extends FrameLayout implements View.OnClickListener, AdapterView.OnItemClickListener {    private EditText mEt;    private ImageButton mIb;    private ListView mLv;    private Context context;    private PopupWindow popWindow;    public CDropEditText(Context context) {        super(context);        this.context = context;    }    public CDropEditText(Context context,AttributeSet attrs) {        super(context, attrs);        //放在三个属性的构造方法处会报错        LayoutInflater.from(context).inflate(R.layout.custome_dropedittext, this);        mEt = (EditText) findViewById(R.id.CD_Et_account);        mIb = (ImageButton) findViewById(R.id.CD_Iv_drop_image);        initPopWindow(mIb);    }    public CDropEditText( Context context, AttributeSet attrs,int defStyleAttr) {        super(context, attrs, defStyleAttr);    }    @Override    protected void onLayout(boolean changed, int left, int top, int right, int bottom) {        super.onLayout(changed, left, top, right, bottom);    }    @Override    protected void onFinishInflate() {        super.onFinishInflate();        mIb.setOnClickListener(this);        mLv.setOnItemClickListener(this);    }    /**     * 编辑内容改变监听     * @param textWatcher     */    public void setEditChange(TextWatcher textWatcher){        if(textWatcher!=null){            mEt.addTextChangedListener(textWatcher);        }    }    /**     * 给list添加数据     * @param adapter     */    public void setAdapter(BaseAdapter adapter){        //popWindow.showAsDropDown(this, 0, 5);        mLv.setAdapter(adapter);    }    private void initPopWindow(View v) {        View view = LayoutInflater.from(getContext()).inflate(R.layout.pop_view, null, false);        mLv = (ListView) view.findViewById(R.id.CD_pop);        popWindow= new PopupWindow(view, ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT, true);        popWindow.setTouchable(true);        popWindow.setTouchInterceptor(new View.OnTouchListener() {            @Override            public boolean onTouch(View v, MotionEvent event) {                return false;            }        });        popWindow.setBackgroundDrawable(new ColorDrawable(0x00000000));    //要为popWindow设置一个背景才有效    }    public void showPop(){//弹出listview        popWindow.showAsDropDown(this, 0, 5);    }    @Override//下拉图标按钮监听    public void onClick(View v) {        if(v.getId() == R.id.CD_Iv_drop_image) {            if(popWindow.isShowing()) {                popWindow.dismiss();                return;            }            popWindow.showAsDropDown(this, 0, 5);        }    }    @Override//listview中item的点击事件监听    public void onItemClick(AdapterView<?> parent, View view, int position, long id) {        mEt.setText(mLv.getAdapter().getItem(position).toString());        popWindow.dismiss();    }}

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