java - 单击按钮时开始的 Intent 是什么以及如何在基本数学应用程序中计算分数？

Question

我正在尝试创建一个非常基本的应用程序，用户应该为一个简单的数学问题提供解决方案。例如，数学问题是 10+0=，用户应该输入这两个数字的和。我被困在用户输入答案并单击“确定”按钮的位置。我知道我应该在这里开始某种 Intent ，但我不确定是什么样的 Intent ？我希望应用程序能够判断所提供的解决方案是数学问题的正确还是错误答案，如果正确，则将当前分数加 1(在底部的 TextView 中)并显示一个新的随机数学问题就像已解决(或未解决)的问题一样。

MathActivity.java

public class MathActivity extends Activity {

private MediaPlayer mp;

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

    //Media player with toggle button
    final ToggleButton togglesound = (ToggleButton) findViewById(R.id.togglesound);
    mp = MediaPlayer.create(this, R.raw.sound);
    togglesound.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            if (togglesound.isChecked()) {
                mp.start();
            } else {
                mp.pause();
            }   
        }
    });

    //Two random integers adding up to the sum of 10
    int min = 1;
    int max = 10;
    Random randomint = new Random();
    int randomint1 = randomint.nextInt(max - min +1) + min;
    int randomint2 = 10 - randomint1;
    //Displays random problem in textview
    TextView displayrandomproblem = (TextView) findViewById(R.id.tvrandomproblem);
    displayrandomproblem.setText(randomint1 + " + " + randomint2 + " = ");

    //Fetches user answer and converts it to an integer
        EditText answer = (EditText)findViewById(R.id.editanswer); {
        if (answer.getText().toString().length() > 0){
            int answerInt = Integer.parseInt(answer.getText().toString());
        }
    //Displaying a toast if no answer is provided
        else
        {
            Toast.makeText(getApplicationContext(), "Please enter your solution to the math problem!",
                   Toast.LENGTH_SHORT).show();
        }
            }
    //When the OK button is clicked
        findViewById(R.id.btnok).setOnClickListener(new OnClickListener() {
            public void onClick(View v) {
                //Submit user's answer
                Intent intent = new Intent();
        }});

}
    //Releasing media player on pause
    @Override
    public void onPause() {
        super.onPause();
        if (mp !=null) {
            mp.release();
            mp = null;
        }
}

}

activity_math.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/bg" >
 <TextView
    android:id="@+id/tvheadline"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentTop="true"
    android:layout_centerHorizontal="true"
    android:text="SPELA"
    android:textColor="@color/gul"
    android:textStyle="bold"
    android:typeface="monospace"
    android:textAppearance="?android:attr/textAppearanceLarge" />
<ToggleButton
    android:id="@+id/togglesound"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentBottom="true"
    android:layout_alignParentRight="true"
    android:textColor="@color/gul"
    android:textOn="Sound is on"
    android:textOff="Sound is off"
    android:text="ToggleButton" />
<TextView
    android:id="@+id/tvrandomproblem"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignBottom="@+id/editanswer"
    android:layout_alignLeft="@+id/tvheadline"
    android:text="x + x ="
    android:textColor="@color/gul" />
<EditText
    android:id="@+id/editanswer"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_below="@+id/tvheadline"
    android:layout_marginTop="58dp"
    android:layout_toRightOf="@+id/tvrandomproblem"
    android:ems="2"
    android:inputType="number"
    android:textColor="@color/gul" >
    <requestFocus />
</EditText>
<Button
    android:id="@+id/btnok"
    style="?android:attr/buttonStyleSmall"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_below="@+id/tvrandomproblem"
    android:layout_centerHorizontal="true"
    android:layout_marginTop="33dp"
    android:text="OK"
    android:textColor="@color/gul" />
<TextView
    android:id="@+id/tvcurrentscore"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignRight="@+id/tvrandomproblem"
    android:layout_below="@+id/btnok"
    android:layout_marginTop="34dp"
    android:text="Current score:"
    android:textColor="@color/gul"
    android:textAppearance="?android:attr/textAppearanceSmall" />

Answer 1

我认为，你不需要使用Intent。它们仅用于应用程序之间的互连或 Activity 之间的数据传输。

据我了解，您的应用程序只有一个 Activity ，因此您只需要永久增加底部的 textedit 的值

EditText 分数 = (EditText)findViewById(R.id.tvcurrentscore);
Score.setText(String.valueOf(Integer.valueOf(score.getText) + 1))