如何在Java/Android中创建单独的按钮功能？

我有一个名为Menu的类，在该类中我想放置一个按钮菜单，如buttonA、buttonB、buttonC等等。但是，当我在手机上运行应用程序时，我不能在点击buttonA之前点击buttonB。如果我先点击buttonA，我可以选择buttonA或buttonB。问题是如何分离菜单类中的按钮，以便能够随时点击任何按钮

package com.emods.app1;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;

public class Menu extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    Button btnA = (Button) findViewById(R.id.button1);
    btnA.setOnClickListener(new View.OnClickListener() {

        public void onClick(View v) {
            // TODO Auto-generated method stub
            startActivity(new Intent ("com.emods.app1.BUTTONA"));

    Button btnB = (Button) findViewById(R.id.button2);
    btnB.setOnClickListener(new View.OnClickListener() {

        public void onClick(View v) {
            startActivity(new Intent ("com.emods.app1.BUTTONB"));
        }
        });
        }

    });
}

}

---

您需要将您的btnB放在btnA的onClick事件之外。目前，您在btnA的onClick事件中有btnB声明

Button btnA = (Button) findViewById(R.id.button1);     
btnA.setOnClickListener(new View.OnClickListener() {          
    public void onClick(View v) {             
        // TODO Auto-generated method stub             
        startActivity(new Intent ("com.emods.app1.BUTTONA"));      
    }         
});   
Button btnB = (Button) findViewById(R.id.button2);     
btnB.setOnClickListener(new View.OnClickListener() {          
    public void onClick(View v) {             
        startActivity(new Intent ("com.emods.app1.BUTTONB"));         
    }      
}); 

---

您为第一个按钮的侦听器中的第二个按钮定义了侦听器。

嵌套问题

更改：

Button btnA = (Button) findViewById(R.id.button1);
btnA.setOnClickListener(new View.OnClickListener() {

    public void onClick(View v) {
        // TODO Auto-generated method stub
        startActivity(new Intent ("com.emods.app1.BUTTONA"));

Button btnB = (Button) findViewById(R.id.button2);
btnB.setOnClickListener(new View.OnClickListener() {

    public void onClick(View v) {
        startActivity(new Intent ("com.emods.app1.BUTTONB"));
    }
    });
    }

});

致：

}))

---

这应该可以解决问题。

只有括号错误：

Button btnA = (Button) findViewById(R.id.button1);
btnA.setOnClickListener(new View.OnClickListener() 
{

    public void onClick(View v) {
        // TODO Auto-generated method stub
        startActivity(new Intent ("com.emods.app1.BUTTONA"));
    }
});

Button btnB = (Button) findViewById(R.id.button2);
btnB.setOnClickListener(new View.OnClickListener() 
{

    public void onClick(View v) {
        startActivity(new Intent ("com.emods.app1.BUTTONB"));
    }

});

package com.emods.app1;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;

public class Menu extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    Button btnA = (Button) findViewById(R.id.button1);
    btnA.setOnClickListener(new View.OnClickListener() {

        public void onClick(View v) {
            // TODO Auto-generated method stub
            startActivity(new Intent ("com.emods.app1.BUTTONA"));
        }
    });

    Button btnB = (Button) findViewById(R.id.button2);
    btnB.setOnClickListener(new View.OnClickListener() {

        public void onClick(View v) {
            startActivity(new Intent ("com.emods.app1.BUTTONB"));

        }
    });
}

}

您应该在IDE中激活自动格式化

package com.emods.app1;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;

public class Menu extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    Button btnA = (Button) findViewById(R.id.button1);
    btnA.setOnClickListener(new View.OnClickListener() {

        public void onClick(View v) {
            // TODO Auto-generated method stub
            startActivity(new Intent ("com.emods.app1.BUTTONA"));
        }
    });

    Button btnB = (Button) findViewById(R.id.button2);
    btnB.setOnClickListener(new View.OnClickListener() {

        public void onClick(View v) {
            startActivity(new Intent ("com.emods.app1.BUTTONB"));

        }
    });
}

}