我是Android新手。我知道以前曾问过这个问题,但我仍然很困惑。
onOptionsItemSelected(MenuItem item)
的作用是什么?@Override
public boolean onOptionsItemSelected(MenuItem item) {
if (mToggle.onOptionsItemSelect(item)) {
return true;
}
return super.onOptionsItemSelected(item);
}
答案 0 :(得分:0)
调用时,使用我发布的示例代码,它会触发单击的按钮,例如项目1、2或3
<menu xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools" >
<item android:id="@+id/item1"
android:title="Item 1"/>
<item android:id="@+id/item2"
android:title="Item 2"/>
<item android:id="@+id/item3"
android:title="Item 3"
app:showAsAction="withText"/>
@Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
switch (id){
case R.id.item1:
Toast.makeText(getApplicationContext(),"Item 1 Selected",Toast.LENGTH_LONG).show();
return true;
case R.id.item2:
Toast.makeText(getApplicationContext(),"Item 2 Selected",Toast.LENGTH_LONG).show();
return true;
case R.id.item3:
Toast.makeText(getApplicationContext(),"Item 3 Selected",Toast.LENGTH_LONG).show();
return true;
default:
return super.onOptionsItemSelected(item);
}
}
}