我做了这个菜单,当我点击一个菜单项时没有任何反应,它甚至没有显示默认的吐司! Maan我不知道发生了什么事!
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">
<item android:id="@+id/menuLapiz" android:alphabeticShortcut="l"
android:icon="@drawable/pencil" />
<item android:id="@+id/menuCirculo" android:alphabeticShortcut="c"
android:icon="@drawable/circulo" />
<item android:id="@+id/menuTriangulo" android:alphabeticShortcut="t"
android:icon="@drawable/triangulo" />
<item android:id="@+id/menuCuadrado" android:alphabeticShortcut="s"
android:icon="@drawable/cuadrado" /> </menu>
DrawActivity.java ...在这里,我获得了菜单onOptionsSelected,其显然无法正常工作
import android.app.Activity
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.Window;
import android.view.WindowManager;
import android.widget.Toast; `
public class DrawActivity extends Activity {
DrawView drawView;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Set full screen view
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
// No Title
requestWindowFeature(Window.FEATURE_NO_TITLE);
drawView = new DrawView(this);
setContentView(drawView);
drawView.requestFocus();
}
@Override
public boolean onCreateOptionsMenu(Menu menu){
super.onCreateOptionsMenu(menu);
MenuInflater awesome = getMenuInflater();
awesome.inflate(R.menu.main_menu, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item){
switch(item.getItemId()){
case R.id.menuLapiz:
Toast.makeText(this, "This is a toast", Toast.LENGTH_LONG);
return true;
default:
Toast.makeText(this, "This is a toast", Toast.LENGTH_LONG);
return true;
}
}}
我不知道为什么onOptionsItemSelected(MenuItem item)方法不起作用我已经尝试过没有选项S,因为我在其他帖子中读到了这个建议,但它没有用。
我是Android编程的新手,所以我真的不知道发生了什么......任何帮助都会受到赞赏,非常感谢!! pd:如果你想看DrawView.java类,请告诉我。
答案 0 :(得分:0)
在每个案例的末尾添加return true;
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.mAdd:
startActivity(new Intent("com.example.ADD"));
return true;
case R.id.mAbout:
startActivity(new Intent("com.example.ABOUT"));
return true;
}
return false;
}
编辑:吐司代码
Toast t = Toast.makeText(getApplicationContext(),
"This is a toast",
Toast.LENGTH_SHORT);
t.show();