Android-如何在片段类中访问操作栏的菜单项 [英] Android - How to access actionbar's menu items in fragment class

问题描述

如何分段访问操作栏的菜单项? 我已经尝试过了，但是什么也没发生

How should I access the actionbar's menu items in fragment ? I have tried this but nothing happened

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    // TODO Auto-generated method stub

    switch (item.getItemId()) {
    case R.id.menu_refresh:
        Toast.makeText(getActivity().getApplicationContext(), "clicked", Toast.LENGTH_SHORT).show();
        return true;
    default:
        return super.onOptionsItemSelected(item);
    }
}

@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
    // TODO Auto-generated method stub
    super.onCreateOptionsMenu(menu, inflater);
}

推荐答案

请按照以下步骤操作:

• 在您的片段中添加setHasOptionsMenu(true)方法.

• Add setHasOptionsMenu(true) method in your Fragment.

覆盖onCreateOptionsMenu(菜单菜单，MenuInflater充气器)和 片段中的onOptionsItemSelected(MenuItem item)方法.

Override onCreateOptionsMenu(Menu menu, MenuInflater inflater) and onOptionsItemSelected(MenuItem item) methods in your Fragment.

在您的onOptionsItemSelected(MenuItem item)活动的方法中， 确保在菜单项操作为时返回false 在onOptionsItemSelected(MenuItem item)Fragment中实现 方法.

Inside your onOptionsItemSelected(MenuItem item) Activity's method, make sure you return false when the menu item action would be implemented in onOptionsItemSelected(MenuItem item) Fragment's method.

示例:

活动

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    MenuInflater inflater = getSupportMenuInflater();
    inflater.inflate(R.menu.main, menu);
    return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    switch (item.getItemId()) {
    case R.id.activity_menu_item:
        // Do Activity menu item stuff here
        return true;
    case R.id.fragment_menu_item:
        // Not implemented here
        return false;
    default:
        break;
    }

    return false;
}

片段

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setHasOptionsMenu(true);
    ....
}

@Override
public void onCreateOptionsMenu(Menu menu,MenuInflater inflater) {
    // Do something that differs the Activity's menu here
    super.onCreateOptionsMenu(menu, inflater);
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    switch (item.getItemId()) {
    case R.id.activity_menu_item:
        // Not implemented here
        return false;
    case R.id.fragment_menu_item:
        // Do Fragment menu item stuff here
        return true;
    default:
        break;
    }

    return false;
}

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