一.前言
在开发中，或许一个业务需求中会出现很多系统控件组合成的布局，并且经常需要复用。比如在一个表单中,里面有个编辑框EditText右侧还需要有个选项卡按钮,需要有编辑框的输入功能也需要有右侧选项卡的点击事件,同时这两个控件也存在一定关联,且在一个界面出现很多次,这个时候可以设计一个属于自己的组合View控件.
二.开发流程
1.新建一个attrs.xml属性集文件，即你要自定义控件的属性
2.新建一个xml布局文件，要显示的组合控件的布局
3.新建一个类，继承FrameLayout,LinearLayout或者RelativeLayout等
4.得到属性集对象TypeArray
5.通过属性集得到各个属性及设置属性
6.向外暴露set设置属性的方法
7.向外暴露事件接口供调用
三.示例
1.功能:一个编辑框,右侧有个选项按钮,点击选项按钮弹出Popwindow,里面是个Recylerview列表,点击列表后把对应的值赋值到编辑框里面.
2.代码
package cn.qzzg.mobilenurse.views;
import android.content.Context;
import android.content.res.TypedArray;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.EditText;
import android.widget.RelativeLayout;
import java.util.ArrayList;
import java.util.List;
import cn.qzzg.mobilenurse.R;
import cn.qzzg.mobilenurse.adapter.recyclerview.BaseRVAdapter;
import cn.qzzg.mobilenurse.fragment.access.enterHos.adapter.PopListAdapter;
import cn.qzzg.mobilenurse.popwindow.CustomPopWindow;
import cn.qzzg.mobilenurse.utils.ToastUtils;
/**
* Created by lss0555 on 2018/10/12/012.
* description:编辑框结合下拉布局
*/
public class SelectEditText extends RelativeLayout{
private float editText_width;
private EditText mEtName;
private RelativeLayout mRtlSelect;
private Context context;
private CustomPopWindow popWindow;
public SelectEditText(@NonNull Context context) {
super(context);
}
public SelectEditText(Context context, @Nullable AttributeSet attrs) {
super(context, attrs);
initview(context,attrs);
}
@Override
protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
super.onLayout(changed, left, top, right, bottom);
}
public void initview(Context context,@Nullable AttributeSet attrs){
this.context = context;
LayoutInflater.from(context).inflate(R.layout.item_edittext_select,this,true);
//自定义属性
TypedArray attributes=context.obtainStyledAttributes(attrs,R.styleable.SelectEditText);
}
@Override
protected void onFinishInflate() {
super.onFinishInflate();
mEtName = (EditText) findViewById(R.id.et_name);
mRtlSelect = (RelativeLayout)findViewById(R.id.rtl_select);
List<String> stringList=new ArrayList<>();
stringList.clear();
stringList.add("选项一");
stringList.add("选项二");
stringList.add("选项三");
stringList.add("选项四");
stringList.add("选项五");
stringList.add("选项六");
setOnSelectPopListLitner(stringList, new OnSelectPopListLitner() {
@Override
public void seleted(String text) {
ToastUtils.showToast(""+text);
}
});
}
/**
* 处理Listview
* @param contentView
*/
private void handleListView(View contentView, final EditText mEtName){
RecyclerView recyclerView = (RecyclerView) contentView.findViewById(R.id.rv_list);
LinearLayoutManager manager = new LinearLayoutManager(context);
manager.setOrientation(LinearLayoutManager.VERTICAL);
recyclerView.setLayoutManager(manager);
//加载适配器
PopListAdapter adapter = new PopListAdapter(context, stringList, R.layout.item_pop_window_text);
recyclerView.setAdapter(adapter);
adapter.setOnItemClickListener(new BaseRVAdapter.OnItemClickListener<String>() {
@Override
public void onItemClick(View view, int position, String item) {
mEtName.setText("" + item);
popWindow.dissmiss();
if(onSelectPopListLitner!=null){
onSelectPopListLitner.seleted(item);
}
}
});
}
public interface OnSelectPopListLitner{
void seleted(String text);
}
private List<String> stringList;
public OnSelectPopListLitner onSelectPopListLitner;
public void setOnSelectPopListLitner(List<String> stringList,OnSelectPopListLitner listLitner){
this.stringList = stringList;
this.onSelectPopListLitner=listLitner;
mRtlSelect.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View view) {
View contentView = LayoutInflater.from(context).inflate(R.layout.pop_layout1,null);
//处理popWindow 显示内容
handleListView( contentView,mEtName);
popWindow = new CustomPopWindow.PopupWindowBuilder(context)
.setView(contentView)
.setFocusable(true)
.setOutsideTouchable(true)
.create();
popWindow.showAsDropDown(mEtName,10,-30);
}
});
}
}
3.item_edittext_select的布局代码
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:background="@drawable/gray_border_box"
android:layout_height="45dp">
<LinearLayout
android:layout_width="match_parent"
android:orientation="horizontal"
android:layout_height="match_parent">
<EditText
android:layout_height="match_parent"
android:id="@+id/et_name"
android:singleLine="true"
android:background="@drawable/seletor_edittext_color_gray2blue"
android:layout_weight="1"
android:layout_width="match_parent"
android:layout_gravity="center"
android:gravity="center"
android:textSize="15sp"/>
<RelativeLayout
android:id="@+id/rtl_select"
android:layout_width="50dp"
android:background="@drawable/gray_border_box"
android:layout_height="match_parent">
<ImageView
android:layout_width="wrap_content"
android:background="@mipmap/up_down"
android:layout_centerInParent="true"
android:layout_centerVertical="true"
android:layout_height="wrap_content" />
</RelativeLayout>
</LinearLayout>
</RelativeLayout>
4.item_pop_window_text布局代码
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="150dp"
android:layout_height="45dp">
<TextView
android:id="@+id/tv_name"
android:layout_centerVertical="true"
android:layout_marginLeft="10dp"
android:layout_marginBottom="10dp"
android:textSize="15sp"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</RelativeLayout>