我希望我的应用程序在 listView 中显示 editText 的用户输入。我尝试过使用 setText 方法,但问题是所需的参数是字符串,而我传递的是 editText。那么我该怎么做才能传递 editText。
我的 mainActivity 类 包 com.example.manuj.autocalc;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.ArrayAdapter;
import android.widget.EditText;
import android.widget.ListView;
import java.util.ArrayList;
public class MainActivity extends AppCompatActivity {
EditText editTotal;
EditText editItem;
EditText editAmt;
ListView listView;
CustomAdapter customAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
editItem=findViewById(R.id.itemEdit);
editTotal=findViewById(R.id.editTotal);
editAmt=findViewById(R.id.amtEdit);
final ArrayList<Calc> calcs=new ArrayList<>();
listView=findViewById(R.id.listView);
customAdapter=new CustomAdapter(this,-1,calcs);
listView.setAdapter(customAdapter);
Calc calc=new Calc(editItem.getText().toString(),editAmt.getText().toString(),editTotal.getText().toString());
calcs.add(calc);
customAdapter.notifyDataSetChanged();
}
}
这是我的适配器类
package com.example.manuj.autocalc;
import android.content.Context;
import android.support.annotation.NonNull;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.EditText;
import java.util.ArrayList;
public class CustomAdapter extends ArrayAdapter<Calc> {
public CustomAdapter(Context context, int resource, ArrayList<Calc> calcs) {
super(context, resource, calcs);
}
@Override
public View getView(int position, View view, ViewGroup parent) {
Calc calc = getItem(position);
if (view == null){
view = LayoutInflater.from(getContext()).inflate(
R.layout.list_item, parent, false);
}
//get and set the items
EditText item=(EditText)view.findViewById(R.id.itemEdit);
item.setText(calc.getmItemEdit());
//get and set the amt
EditText amt=view.findViewById(R.id.amtEdit);
amt.setText(calc.getmAmtEdit());
//get and set the totalAmt
EditText total=view.findViewById(R.id.editTotal);
total.setText(calc.getmTotalEdt());
return view;
}
}
**This is my model class**
package com.example.manuj.autocalc;
import android.widget.EditText;
public class Calc {
private String mItemEdit;
private String mTotalEdt;
private String mAmtEdit;
Calc(String itemEdit,String totalEdit,String amtEdit){
this.mItemEdit=itemEdit;
this.mTotalEdt=totalEdit;
this.mAmtEdit=amtEdit;
}
public String getmItemEdit(){return mItemEdit;}
public String getmTotalEdt(){return mTotalEdt;}
public String getmAmtEdit(){return mAmtEdit;}
}
最佳答案
您的 Calc 类构造函数需要 3 个字符串:
Calc calc=new Calc(editItem.getText().toString(),editTotal.getText().toString(),editAmt.getText().toString());
关于java - 使用 arrayAdapter 在 listView 中显示来自 editText 的用户输入,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/51801926/