使用两个Textwatcher在文本框中添加值并在文本框中显示，但它不起作用

Question

我想在文本更改上添加两个Edittext值的总和并将其显示在第三个Edittext上，如果我更改这两个文本中的任何一个EDITTEXT那么它必须反映在第三编辑文本的总和，但它给我的垃圾值谁能帮助

package com.example.bipinp.mithun; 

import android.os.Bundle; 
import android.support.design.widget.FloatingActionButton; 
import android.support.design.widget.Snackbar; 
import android.support.v7.app.AppCompatActivity; 
import android.support.v7.widget.Toolbar; 
import android.text.Editable; 
import android.text.TextWatcher; 
import android.view.View; 
import android.widget.AdapterView; 
import android.widget.ArrayAdapter; 
import android.widget.Button; 
import android.widget.EditText; 
import android.widget.Spinner; 
import android.widget.Toast; 

import java.util.ArrayList; 
import java.util.List; 

public class DailyEntry extends AbstractActivity implements TextWatcher { 
    private Button btnsbmtentry; 
    private Spinner spiner2; 
    private EditText milkcaret,amount,amountp,prevbal,currentBal,totalBal; 
    DatabaseHelper mydb; 
    int amnt,amntp,sub; 
    String sAmnt,sAmntp,sumvalue; 


    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_daily_entry); 
     mydb = new DatabaseHelper(this); 


     btnsbmtentry=(Button)findViewById(R.id.btnsubmitentry); 
     spiner2=(Spinner)findViewById(R.id.spinner2); 
     milkcaret=(EditText)findViewById(R.id.txt1_de); 
     amount=(EditText)findViewById(R.id.txt2_de); 
     amountp=(EditText)findViewById(R.id.txt3_de); 
     prevbal = (EditText)findViewById(R.id.txt4_de); 

     totalBal = (EditText)findViewById(R.id.txt4_deTotBal); 
     amount.addTextChangedListener(this); 
     amountp.addTextChangedListener(this); 

     adddata2(); 
     loadspinner(); 
     spiner2.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() { 
      @Override 
      public void onItemSelected(AdapterView<?> parent, View view, int position, long id) { 
       String pos = parent.getItemAtPosition(position).toString(); 
       String bale = mydb.balance(pos); 
       prevbal.setText(bale); 

      } 

      @Override 
      public void onNothingSelected(AdapterView<?> parent) { 

      } 
     }); 

    } 

    private void loadspinner() { 
     DatabaseHelper db = new DatabaseHelper(this); 
     List<String> labels = db.getAllLabels(); 
     ArrayAdapter<String> dataAdapter = new ArrayAdapter<String>(this,R.layout.support_simple_spinner_dropdown_item,labels); 
     dataAdapter.setDropDownViewResource(R.layout.support_simple_spinner_dropdown_item); 
     spiner2.setAdapter(dataAdapter); 
    } 

    private void adddata2() { 
     btnsbmtentry.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       boolean insertdata2 = mydb.insertdata2(spiner2.getSelectedItem().toString(),milkcaret.getText().toString(),amount.getText().toString(),amountp.getText().toString(),totalBal.getText().toString()); 
       if (insertdata2) 
        Toast.makeText(DailyEntry.this, "Record Inserted", Toast.LENGTH_SHORT).show(); 
       else 
        Toast.makeText(DailyEntry.this, "Databse Error", Toast.LENGTH_SHORT).show(); 
      } 
     }); 
    } 


    @Override 
    public void beforeTextChanged(CharSequence s, int start, int count, int after) { 

    } 

    @Override 
    public void onTextChanged(CharSequence s, int start, int before, int count) { 

    } 

    @Override 
    public void afterTextChanged(Editable s) { 
     prevbal=(EditText)findViewById(R.id.txt4_de); 
     currentBal = (EditText)findViewById(R.id.txt4_deCurrB); 

     sAmnt = amount.getText().toString(); 
     sAmntp = amount.getText().toString(); 
     try { 
      amnt = Integer.parseInt(sAmnt); 
      amntp = Integer.parseInt(sAmntp); 
      sub = amnt-amntp; 
     }catch (NumberFormatException e){ 

     } 
     sumvalue = String.valueOf(sub); 
     currentBal.setText(sumvalue); 

    } 
} 

Answer 1

您从amount两次获取文本。我想你可能希望它把它改成你的两个EditText？

@Override 
    public void afterTextChanged(Editable s) { 
    prevbal=(EditText)findViewById(R.id.txt4_de); 
    currentBal = (EditText)findViewById(R.id.txt4_deCurrB); 

    sAmnt = amount.getText().toString(); 
    sAmntp = amountp.getText().toString(); 


    //...