自定义View

package com.example.week02test;

import android.content.Context;
import android.util.AttributeSet;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.LinearLayout;
import android.widget.Toast;

/**

• @author liuruiqi

• @fileName CustomTitle

• @package com.example.week02test

• @date 2019/2/23 11:54
  **/
  public class CustomTitle extends LinearLayout {

  private EditText et_goods;
  private Button bt_search;

  //创建接口
  public interface onSearchLisenter{
  void onSearch(String goods);
  }
  //声明
  public onSearchLisenter searchLisenter;

  //set方法
  public void onSearchLisenter(onSearchLisenter searchLisenter){
  this.searchLisenter=searchLisenter;
  }

  public CustomTitle(Context context) {
  super(context);
  }

  public CustomTitle(Context context, AttributeSet attrs) {
  super(context, attrs);
  initView();
  }

  public CustomTitle(Context context, AttributeSet attrs, int defStyleAttr) {
  super(context, attrs, defStyleAttr);
  }
  private void initView() {

   //创建布局
   View view=inflate(getContext(),R.layout.customtitle,null);
   addView(view);
  
   //找控件
   et_goods = view.findViewById(R.id.et_goods);
   bt_search = view.findViewById(R.id.bt_search);
  
   //点击事件
   bt_search.setOnClickListener(new OnClickListener() {
       @Override
       public void onClick(View v) {
           //得到输入框的值
           String goods = et_goods.getText().toString();
  
           //非空验证
           if (goods.equals("")){
               Toast.makeText(getContext(), "你没有写东西呦!", Toast.LENGTH_SHORT).show();
               return;
           }
  
           //调用接口
           searchLisenter.onSearch(goods);
  
  
       }
   });
  

  }

}