如何在具有一个布局的活动中实现两个或多个按钮

Question

我有一个布局和多个按钮，但我无法实现更多按钮。我只能在一个活动中实现一个按钮来打开另一个布局。如何解决此问题？

这是我的代码：

public class AppActivity extends Activity {
    Button button;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        addListenerOnButton();
    }
    public void addListenerOnButton() {
        final Context context = this;
        button = (Button) findViewById(R.id.button1);
        button.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View arg0) {
                Intent intent = new Intent(context, App2Activity.class);
                startActivity(intent);
            }
        });
    }
}

Answer 1

这样做：

button1 = (Button) findViewById(R.id.button1);
button1.setOnClickListener(new OnClickListener() {
    @Override
    public void onClick(View arg0) {
        Intent intent = new Intent(context, App2Activity.class);
        startActivity(intent);   
    }
});
button2 = (Button) findViewById(R.id.button2);
button2.setOnClickListener(new OnClickListener() {
    @Override
    public void onClick(View arg0) {
        second Button code;   
    }
});

其中 button2 是在 XML 中定义的第二个按钮的 ID

Answer 2

你可以这样做-

public class AppActivity extends Activity {
    Button button1, button2;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        addListenerOnButton();
    }
    public void addListenerOnButton() {
        final Context context = this;
        button1 = (Button) findViewById(R.id.button1);
        button1.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View arg0) {
                Intent intent = new Intent(context, App2Activity.class);
                startActivity(intent);
            }
        });
        button2 = (Button) findViewById(R.id.button2);
        button2.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View arg0) {
                Intent intent = new Intent(context, App3Activity.class);
                startActivity(intent);
            }
        });
    }
}