android - 带有添加按钮的动态 View ，如何找到唯一的 edtxt ID 或其他任何东西

Question

我正在构建一个 android 应用程序，我正在创建动态 EditText View 。我需要在顶部 TextView 上显示所有 EditText 的总和。我找不到办法做到这一点，任何人都可以帮我解决这个问题。

而且我也不明白，当我点击添加按钮时，只有一个动态 View 似乎是实时的，其余的似乎在 sleep ....(这只是我程序的一部分...)

提前致谢。

这是我的 XML

<LinearLayout
    android:id="@+id/linearBelowBoard"
    android:orientation="vertical"
    android:layout_below="@+id/button2"
    android:layout_width="match_parent"
    android:layout_height="wrap_content">

</LinearLayout>

<Button
    android:text="Add"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:id="@+id/button2"
    android:layout_below="@+id/totalText"
    android:layout_alignParentLeft="true"
    android:layout_alignParentStart="true"
    android:layout_marginLeft="111dp"
    android:layout_marginStart="111dp" />

<TextView
    android:text="Sum"
    android:textStyle="bold"
    android:textSize="40dp"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:id="@+id/totalText"
    android:layout_alignParentTop="true"
    android:layout_alignRight="@+id/button2"
    android:layout_alignEnd="@+id/button2" />

行.xml

    <?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent">

    <RelativeLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content">

        <EditText
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:inputType="number"
            android:ems="10"
            android:id="@+id/editText"
            android:textColor="#000000"
            android:layout_toLeftOf="@+id/button"
            android:layout_toStartOf="@+id/button" />

        <Button
            android:text="Delete"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_centerVertical="true"
            android:layout_alignParentRight="true"
            android:layout_alignParentEnd="true"
            android:id="@+id/button" />


    </RelativeLayout>


</LinearLayout>

这是我的 Java 文件

    package com.example.rajiv.aaaplusbutton;

import android.content.Context;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.text.Editable;
import android.text.TextWatcher;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageButton;
import android.widget.LinearLayout;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity {

    EditText edt1;
    Button but_add, but_remove;
    TextView txtSum;
    LinearLayout linearBelowBoard;
    int e1;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        linearBelowBoard = (LinearLayout) findViewById(R.id.linearBelowBoard);

        txtSum=(TextView)findViewById(R.id.totalText);


        but_add = (Button) findViewById(R.id.button2);
        but_add.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {

                LayoutInflater layoutInflater =
                        (LayoutInflater) getApplicationContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
                final View addView = layoutInflater.inflate(R.layout.row, null);


                edt1 = (EditText) addView.findViewById(R.id.editText);

                edt1.addTextChangedListener(new TextWatcher() {

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

                    @Override
                    public void beforeTextChanged(CharSequence s, int start, int count,
                                                  int after) {
                        if (s.length() > 0) {

                        }
                    }

                    @Override
                    public void afterTextChanged(Editable s) {
                        calCheck();
                    }
                });


                Button but_remove = (Button) addView.findViewById(R.id.button);
                final View.OnClickListener thisListener = new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        ((LinearLayout) addView.getParent()).removeView(addView);
                    }
                };

                but_remove.setOnClickListener(thisListener);
                linearBelowBoard.addView(addView);


            }

        });

    }



    public void calCheck() {

        try {
            e1 = Integer.parseInt(edt1.getText().toString());
            txtSum.setText(Integer.toString(" What to Do? "));

        } catch (Exception e) {
}
}

Answer 1

使用下面的代码来解决您的问题:我对您的代码做了一些更改试试这个:

package com.cj.myapplication;

import android.content.Context;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.LinearLayout;
import android.widget.TextView;

/**
 * Created by CHETAN JOSHI on 3/6/2017.
 */

public class MainActivity extends AppCompatActivity {

    EditText edt1;
    Button but_add, but_remove;
    TextView txtSum;
    LinearLayout linearBelowBoard;
    int e1;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_my);

        linearBelowBoard = (LinearLayout) findViewById(R.id.linearBelowBoard);
        txtSum = (TextView) findViewById(R.id.totalText);
        but_add = (Button) findViewById(R.id.button2);

        but_add.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {

                LayoutInflater layoutInflater =
                        (LayoutInflater) getApplicationContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
                final View addView = layoutInflater.inflate(R.layout.row, null);


                edt1 = (EditText) addView.findViewById(R.id.editText);
                edt1.addTextChangedListener(new MyTextWatcher(edt1));
                Button but_remove = (Button) addView.findViewById(R.id.button);
                final View.OnClickListener thisListener = new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        ((LinearLayout) addView.getParent()).removeView(addView);
                    }
                };

                but_remove.setOnClickListener(thisListener);
                linearBelowBoard.addView(addView);

            }

        });

    }

    private class MyTextWatcher implements TextWatcher {

        EditText mEditText = null;

        public MyTextWatcher(EditText mEditText) {
            this.mEditText = mEditText;
        }

        @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) {
            calCheck(mEditText);
        }
    }

    public void calCheck(EditText editText) {
  try {
        if (linearBelowBoard != null) {
            e1 =0;
            for (int i = 0; i < linearBelowBoard.getChildCount(); i++) {
                LinearLayout linearLayout = (LinearLayout)linearBelowBoard.getChildAt(i);
                RelativeLayout relativeLayout = (RelativeLayout)linearLayout.getChildAt(0);
                View view = relativeLayout.getChildAt(0);
                EditText editText1 = null;
                if (view instanceof EditText) {
                    editText1 = (EditText) view;
                } else {
                    view = relativeLayout.getChildAt(1);
                    editText1 = (EditText) view;
                }
                String str = editText1.getText().toString();
                if(str!=null && !str.equals("") && str.length()>0)
                e1 = e1 + Integer.parseInt(editText1.getText().toString());
            }
            }
        txtSum.setText("" + String.valueOf(e1));

    } catch (Exception e) {
        e.printStackTrace();
    }
    }
}

请检查我创建了另一种通过传递位置返回 EditText 的方法。因此，您需要将任何位置传递到 EditText 的添加计数，然后您将获得 EditText 并且您可以获取 Text().toString()。

更新 calCheck() 方法:

  public void calCheck(EditText editText) {
        try {
            if (linearBelowBoard != null) {
                e1 = 0;
                for (int i = 0; i < linearBelowBoard.getChildCount(); i++) {
                    EditText editText1 = getEditTextFromPosition(i);
                    String str = editText1.getText().toString();
                    if (str != null && !str.equals("") && str.length() > 0)
                        e1 = e1 + Integer.parseInt(editText1.getText().toString());
                }
            }
            txtSum.setText("" + String.valueOf(e1));

        } catch (Exception e) {
            e.printStackTrace();
        }
    }

使用下面的方法获取Edittext:

    private EditText getEditTextFromPosition(int position){
        EditText editText=null;
        LinearLayout linearLayout = (LinearLayout)linearBelowBoard.getChildAt(position);
        RelativeLayout relativeLayout = (RelativeLayout)linearLayout.getChildAt(0);
        View view = relativeLayout.getChildAt(0);

        if (view instanceof EditText) {
            editText = (EditText) view;
        } else {
            view = relativeLayout.getChildAt(1);
            editText = (EditText) view;
        }
        return editText;
    }