我正在尝试在 android 中创建一个菜单。但它只会导致只有文本的空白页。菜单没有出现在屏幕上。代码如下
public class SimpleOptionMenu extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.menu, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.icon: Toast.makeText(this, "You pressed the icon!", Toast.LENGTH_LONG).show();
break;
case R.id.text: Toast.makeText(this, "You pressed the text!", Toast.LENGTH_LONG).show();
break;
case R.id.icontext: Toast.makeText(this, "You pressed the icon and text!", Toast.LENGTH_LONG).show();
break;
}
return true;
} }
请帮助解决这个问题。