Question

在我的活动中，我在操作栏中有三个图标（搜索 - 添加 - 计数），我想在变量hideIcon为true时隐藏这些图标。

以下是我的代码。

MainActivity.java

 @Override
public boolean onCreateOptionsMenu(Menu menu) {
    MenuInflater inflater = getMenuInflater();
    inflater.inflate(R.menu.activity_main_actions, menu);

SearchManager searchManager = (SearchManager) getSystemService(Context.SEARCH_SERVICE);
    SearchView searchView = (SearchView) menu.findItem(R.id.action_search)
            .getActionView();
    searchView.setSearchableInfo(searchManager
            .getSearchableInfo(getComponentName()));

    return super.onCreateOptionsMenu(menu);
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    // Take appropriate action for each action item click
    switch (item.getItemId()) {
    case R.id.action_search:
        // search action
        return true;

    case R.id.action_add_tip:

        return true;

    case R.id.action_count_tip:

        return true;

    case android.R.id.home:

        return true;

    default:

        return super.onOptionsItemSelected(item);
    }
}

menu.activity_main_actions.xml

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android" >

<!-- Search  -->
<item android:id="@+id/action_search"
      android:icon="@drawable/header_search"
      android:title="@string/action_search"
      android:showAsAction="ifRoom"
      android:actionViewClass="android.widget.SearchView"/>


<!-- Add Tip -->
<item android:id="@+id/action_add_tip"
      android:icon="@drawable/header_add"
      android:title="@string/action_add_tip"
      android:showAsAction="ifRoom" />

<!-- Count Tips -->
<item android:id="@+id/action_count_tip"
      android:icon="@drawable/header_count"
      android:title="@string/action_count_tip"
      android:showAsAction="ifRoom" />

</menu>

如何隐藏if(hideIcon) true？提前谢谢。

Answer 1

//anywhere in your code

hideIcon = HIDE_MENU; // setting state

invalidateOptionsMenu(); // now onCreateOptionsMenu(...) is called again




 @Override
public boolean onCreateOptionsMenu(Menu menu)
{
    // inflate menu from xml
    MenuInflater inflater = getSupportMenuInflater();
    inflater.inflate(R.menu.settings, menu);

    if (hideIcon)
    {
        for (int i = 0; i < menu.size(); i++)
            menu.getItem(i).setVisible(false);
    }
}

隐藏/取消隐藏条件中的操作栏项目

1 个答案: