我正在尝试设计一个简单的计算器，用作一两场比赛的记分牌。最终，我希望能够选择玩家的数量，在屏幕上显示那么多的得分跟踪器，能够使用触摸计算器进行加减（或除法或乘法）我让它工作得最多部分。
目前，它采用在计算器显示中输入的文本，对我选择的球员分数进行加/减/任何运算。
问题是试图让数字键显示在计算器显示部分。例如，我希望能够点击“1”然后点击“0”并让“10”出现在计算器中。这应该很容易，因为我可以手动输入文本（使用android默认键盘），但我能得到的最接近的是一次只显示1个数字......
长话短说，我正在尝试让触摸板式计算器的数字按钮工作和显示。下面是我的主要项目代码。如果您需要我的布局代码，我也可以发布（用于引用 ID）。
我知道这可能是一个简单的解决方案，但我发现的每个教程要么过于复杂，要么不起作用......非常感谢任何帮助！
package com.MCalculator8.test;
import com.MCalculator8.test.R;
import android.app.Activity;
import android.app.AlertDialog;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
public class MCalculator8Activity extends Activity {
private EditText player1name;
private EditText player2name;
private EditText player3name;
private EditText player4name;
private EditText player5name;
private EditText player6name;
private EditText player7name;
private EditText player1score;
private EditText player2score;
private EditText player3score;
private EditText player4score;
private EditText player5score;
private EditText player6score;
private EditText player7score;
private EditText input;
private TextView operator;
private MCalculator8Activity mContext;
// Called when the activity is first created.
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mContext = this;
setContentView(R.layout.main);
player1name = (EditText) findViewById(R.id.player1name);
player2name = (EditText) findViewById(R.id.player2name);
player3name = (EditText) findViewById(R.id.player3name);
player4name = (EditText) findViewById(R.id.player4name);
player5name = (EditText) findViewById(R.id.player5name);
player6name = (EditText) findViewById(R.id.player6name);
player7name = (EditText) findViewById(R.id.player7name);
input = (EditText) findViewById(R.id.input);
player1score = (EditText) findViewById(R.id.player1score);
player2score = (EditText) findViewById(R.id.player2score);
player3score = (EditText) findViewById(R.id.player3score);
player4score = (EditText) findViewById(R.id.player4score);
player5score = (EditText) findViewById(R.id.player5score);
player6score = (EditText) findViewById(R.id.player6score);
player7score = (EditText) findViewById(R.id.player7score);
operator = (TextView) findViewById(R.id.operator);
// We create an OnClick Event in each button.
Button plusButton = (Button) findViewById(R.id.add);
Button minusButton = (Button) findViewById(R.id.subtract);
Button multiplyButton = (Button) findViewById(R.id.multiply);
Button player1equals = (Button) findViewById(R.id.player1equals);
Button player2equals = (Button) findViewById(R.id.player2equals);
Button player3equals = (Button) findViewById(R.id.player3equals);
Button player4equals = (Button) findViewById(R.id.player4equals);
Button player5equals = (Button) findViewById(R.id.player5equals);
Button player6equals = (Button) findViewById(R.id.player6equals);
Button player7equals = (Button) findViewById(R.id.player7equals);
plusButton.setOnClickListener(new OnClickListener() {
public void onClick(View arg0) {
operator.setText("+");
}
});
minusButton.setOnClickListener(new OnClickListener() {
public void onClick(View arg0) {
operator.setText("-");
}
});
multiplyButton.setOnClickListener(new OnClickListener() {
public void onClick(View arg0) {
operator.setText("x");
}
});
player1equals.setOnClickListener(new OnClickListener() {
private AlertDialog show;
public void onClick(View arg0) {
if ((input.getText().length() == 0)
|| (input.getText().toString() == " ")) {
// || (input2.getText().length() == 0)
// || (input2.getText().toString() == " ")) {
show = new AlertDialog.Builder(mContext).setTitle("Error")
.setMessage("Some inputs are empty")
.setPositiveButton("OK", null).show();
} else if (operator.getText().equals("")) {
show = new AlertDialog.Builder(mContext).setTitle("Error")
.setMessage("Operator is null").setPositiveButton(
"OK", null).show();
} else if (operator.getText().equals("+")) {
double result = new Double(input.getText().toString())
+ new Double(player1score.getText().toString());
player1score.setText(Double.toString(result));
} else if (operator.getText().equals("-")) {
double result = new Double(player1score.getText().toString())
- new Double(input.getText().toString());
player1score.setText(Double.toString(result));
} else if (operator.getText().equals("x")) {
double result = new Double(input.getText().toString())
* new Double(player1score.getText().toString());
player1score.setText(Double.toString(result));
}
}
});