android - 无法混合使用 TextView 和 EditText 进行计算

Question

我目前正在制作一个非常简单的数学游戏。在这个数学游戏中，我希望玩家能够解决简单的方程式。看起来像这样:9 * __ = 45，然后玩家填写正确的数字来解方程，然后按下正确按钮。如果正确的分数被添加到播放器。

空白处是一个EditText，其他是TextView。因为我混合使用了 TextView 和 EditText，所以我需要以某种方式进行转换以使程序能够读取和计算。我一直在疯狂地阅读，尝试了各种不同的方法，但都没有成功。我应该如何解决这个问题？

这是我的数据的样子:

activity_play.xml

 <?xml version="1.0" encoding="utf-8"?>
    <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:tools="http://schemas.android.com/tools"
        android:id="@+id/activity_play"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:paddingBottom="@dimen/activity_vertical_margin"
        android:paddingLeft="@dimen/activity_horizontal_margin"
        android:paddingRight="@dimen/activity_horizontal_margin"
        android:paddingTop="@dimen/activity_vertical_margin"
        tools:context="com.example.android.laboration2.PlayActivity">


        <TextView
            android:id="@+id/textPlayMultiply"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignTop="@+id/textPlayNumber1"
            android:layout_centerHorizontal="true"
            android:text="@string/multiply"
            android:textAlignment="textStart"
            android:layout_gravity = "start"
            android:textColor="@android:color/black"
            android:textSize="40sp" />

        <TextView
            android:id="@+id/textPlayNumber1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignEnd="@+id/textPlayScore"
            android:layout_alignParentTop="true"
            android:layout_alignRight="@+id/textPlayScore"
            android:layout_marginTop="48dp"
            android:text="@string/number_1"
            android:textAlignment="center"
            android:textColor="@android:color/black"
            android:textSize="50sp" />

        <TextView
            android:id="@+id/textPlayEqual"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="16dp"
            android:text="@string/equal"
            android:textAlignment="center"
            android:textColor="@android:color/black"
            android:textSize="50sp"
            android:layout_below="@+id/editTextPlayNumber2"
            android:layout_alignLeft="@+id/textPlayMultiply"
            android:layout_alignStart="@+id/textPlayMultiply" />

        <TextView
            android:id="@+id/textPlayResult"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="29dp"
            android:text="@string/result_number3"
            android:textAlignment="center"
            android:textColor="@android:color/black"
            android:textSize="50sp"
            android:layout_below="@+id/textPlayEqual"
            android:layout_alignLeft="@+id/textPlayEqual"
            android:layout_alignStart="@+id/textPlayEqual" />

        <TextView
            android:id="@+id/textPlayScore"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentBottom="true"
            android:layout_marginBottom="31dp"
            android:layout_toStartOf="@+id/answerButton"
            android:text="@string/score_0"
            android:textAlignment="textStart"
            android:layout_gravity="start"
            android:textColor="@android:color/black"
            android:textSize="24sp"
            android:layout_toLeftOf="@+id/answerButton" />

        <Button
            android:id="@+id/answerButton"
            android:layout_width="120dp"
            android:layout_height="wrap_content"
            android:layout_marginTop="36dp"
            android:background="@android:color/holo_orange_dark"
            android:text="@string/button_result"
            android:textAllCaps="false"
            android:textColor="@android:color/white"
            android:textSize="18sp"
            android:textStyle="bold"
            android:layout_below="@+id/textPlayResult"
            android:layout_centerHorizontal="true" />

        <EditText
            android:id="@+id/editTextPlayNumber2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignBaseline="@+id/textPlayMultiply"
            android:layout_alignBottom="@+id/textPlayMultiply"
            android:layout_marginLeft="16dp"
            android:layout_marginStart="16dp"
            android:layout_toEndOf="@+id/answerButton"
            android:layout_toRightOf="@+id/answerButton"
            android:hint="    "
            android:inputType="number"
            android:textAlignment="center"
            android:textColor="@android:color/black"
            android:textSize="50sp" />

        <TextView
            android:id="@+id/textPlayLevel"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignBaseline="@+id/textPlayScore"
            android:layout_alignBottom="@+id/textPlayScore"
            android:layout_toEndOf="@+id/answerButton"
            android:layout_toRightOf="@+id/answerButton"
            android:text="@string/level_0"
            android:textAlignment="center"
            android:textColor="@android:color/black"
            android:textSize="24sp" />


    </RelativeLayout>

.

PlayActivity.java

package com.example.android.laboration2;
    import android.support.v7.app.AppCompatActivity;
    import android.os.Bundle;
    import android.view.View;
    import android.widget.Button;
    import android.widget.EditText;
    import android.widget.TextView;


    public class PlayActivity extends AppCompatActivity implements View.OnClickListener {


        TextView textPlayNumber1;
        EditText editTextPlayNumber2;
        TextView textPlayResult;
        TextView textPlayScore;
        TextView textPlayLevel;
        Button answerButton;


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

            textPlayNumber1 = (TextView) findViewById(R.id.textPlayNumber1);
            editTextPlayNumber2 = (EditText) findViewById(R.id.editTextPlayNumber2);
            textPlayResult = (TextView) findViewById(R.id.textPlayResult);
            textPlayScore = (TextView) findViewById(R.id.textPlayScore);
            textPlayLevel = (TextView) findViewById(R.id.textPlayLevel);

            answerButton = (Button) findViewById(R.id.answerButton);
            answerButton.setOnClickListener(this);

        }//onCreate ends here


        @Override
        public void onClick(View v) {

        }//onClick ends here


    }//PlayActivity ends here

Answer 1

你可以做到

int playNumberValue = Integer.getInteger(textPlayNumber1.getText().toString());
int userInputValue = Integer.getInteger(editTextPlayNumber2.getText().toString());
int result = Integer.getInteger(textPlayResult.getText().toString());

if(result == userInputValue+playNumberValue)
    //win game