如何向MainActivity添加第二个按钮代码

Question

如何在我的代码中添加第二个按钮MainActivity？我知道我可能在这里很傻,但不知道我把代码放在第二个按钮链接到不同的活动.我的第一个按钮工作正常,只是不知道该怎么做第二个.

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

    Button buttonabout = (Button)findViewById(R.id.button3);
    buttonabout.setOnClickListener(new OnClickListener() { 

public void onClick(View v) {       
    Intent intent = new Intent(getApplicationContext(),MainActivity2.class);
    startActivity(intent);
}

    });

}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    // Handle action bar item clicks here. The action bar will
    // automatically handle clicks on the Home/Up button, so long
    // as you specify a parent activity in AndroidManifest.xml.
    int id = item.getItemId();
    if (id == R.id.action_settings) {
        return true;
    }
    return super.onOptionsItemSelected(item);
}

Answer 1

这样做:

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

    Button buttonabout = (Button)findViewById(R.id.button3);
    Button button2 = (Button)findViewById(R.id.button4);
buttonabout.setOnClickListener(new OnClickListener() { 

public void onClick(View v) {
    Intent intent = new Intent(getApplicationContext(),MainActivity2.class);
    startActivity(intent);
}

    });
    button2.setOnClickListener(new OnClickListener() { 

public void onClick(View v) {
    Intent intent = new Intent(getApplicationContext(),AnotherActivity.class);
    startActivity(intent);
}

    });

}