java - 我的 Android 应用程序上有 34 个按钮。有什么方法可以避免为每个人编写 onclicklistener 吗？

Question

我可以编写一些代码，这样我就可以将它们全部分组在单个代码中，而不是编写单独的 onClick 监听器吗？目前我有这个。现在我怎样才能避免为每个编写 onclicklistener 方法。

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    DecimalFormat currencyFormatter = (DecimalFormat) NumberFormat.getInstance();
    char decimalSeparator = currencyFormatter.getDecimalFormatSymbols().getDecimalSeparator();
    mDecimalSeparator = Character.toString(decimalSeparator);

    setContentView(R.layout.main);
    mInputStack = new Stack<String>();
    mOperationStack = new Stack<String>();

    inputText = (TextView) findViewById(R.id.InputText);
    inputText.setText("0");
    resultText = (TextView) findViewById(R.id.ResultText);
    resultText.setText("");

One = (Button) findViewById(R.id.button1);
Two = (Button) findViewById(R.id.button2);
Three = (Button) findViewById(R.id.button3);
Four = (Button) findViewById(R.id.button4);
Five = (Button) findViewById(R.id.button5);
Six = (Button) findViewById(R.id.button6);
Seven = (Button) findViewById(R.id.button7);
Eight = (Button) findViewById(R.id.button8);
Nine = (Button) findViewById(R.id.button9);
Zero = (Button) findViewById(R.id.button0);
Add = (Button) findViewById(R.id.buttonAdd);
Subtract = (Button) findViewById(R.id.buttonSubtract);
Multiply = (Button) findViewById(R.id.buttonMultiply);
Divide = (Button) findViewById(R.id.buttonDivide);
Delete = (Button) findViewById(R.id.buttonDel);
Period = (Button) findViewById(R.id.buttonPeriod);
Equal = (Button) findViewById(R.id.buttonEqual);
Sin = (Button) findViewById(R.id.buttonSin);
Cos = (Button) findViewById(R.id.buttonCos);
Tan = (Button) findViewById(R.id.buttonTan);
Cosec = (Button) findViewById(R.id.buttonCosec);
Sec = (Button) findViewById(R.id.buttonSec);
Cot = (Button) findViewById(R.id.buttonCot);
Sinh = (Button) findViewById(R.id.buttonSinh);
Cosh = (Button) findViewById(R.id.buttonCosh);
Tanh = (Button) findViewById(R.id.buttonTanh);
Factorial = (Button) findViewById(R.id.buttonFactorial);
Log = (Button) findViewById(R.id.buttonLog10);
Ln = (Button) findViewById(R.id.buttonLoge);
Reciprocal = (Button) findViewById(R.id.buttonReciprocal);
Square = (Button) findViewById(R.id.buttonSquare);
SquareRoot = (Button) findViewById(R.id.buttonSquareRoot);
Power = (Button) findViewById(R.id.buttonPower);
Percent = (Button) findViewById(R.id.buttonPercent);


One.setOnClickListener(this);
Two.setOnClickListener(this);
Three.setOnClickListener(this);
Four.setOnClickListener(this);
Five.setOnClickListener(this);
Six.setOnClickListener(this);
Seven.setOnClickListener(this);
Eight.setOnClickListener(this);
Nine.setOnClickListener(this);
Zero.setOnClickListener(this);
Add.setOnClickListener(this);
Subtract.setOnClickListener(this);
Divide.setOnClickListener(this);
Multiply.setOnClickListener(this);
Equal.setOnClickListener(this);
Delete.setOnClickListener(this);
Period.setOnClickListener(this);
Sin.setOnClickListener(this);
Cos.setOnClickListener(this);
Tan.setOnClickListener(this);
Cot.setOnClickListener(this);
Sec.setOnClickListener(this);
Cosec.setOnClickListener(this);
Sinh.setOnClickListener(this);
Cosh.setOnClickListener(this);
Tanh.setOnClickListener(this);
Percent.setOnClickListener(this);
Reciprocal.setOnClickListener(this);
Log.setOnClickListener(this);
Ln.setOnClickListener(this);
Power.setOnClickListener(this);
Square.setOnClickListener(this);
SquareRoot.setOnClickListener(this);
Factorial.setOnClickListener(this);
Sign.setOnClickListener(this);

Answer 1

您可以在 xml 中设置 android:click 属性。

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 android:orientation="vertical"
 android:layout_width="fill_parent"
 android:layout_height="fill_parent"
 >
<TextView  
 android:layout_width="fill_parent"
 android:layout_height="wrap_content"
 android:text="@string/hello"
 />
<Button android:layout_height="wrap_content"
 android:layout_width="wrap_content" android:text="Go!"
 android:onClick="goButtonClicked" android:id="@+id/goButton"></Button>
</LinearLayout>

SimplestButtonActivity.java

package com.botbook.simplestbutton;

import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.view.View;
import android.widget.Toast;

public class SimplestButtonActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
    }

    public void goButtonClicked(View v) {
        tToast("Go button clicked!");
    }

    private void tToast(String s) {
        Context context = getApplicationContext();
        int duration = Toast.LENGTH_LONG;
        Toast toast = Toast.makeText(context, s, duration);
        toast.show();
    }
}