[英]How to always show overflow menu (ActionBar) even if phone has hardware menu button?
下面提到的是已實現的代碼。 請為我提供建議,即使電話具有硬件菜單按鈕,如何在操作欄中創建“溢出菜單”選項?
這是我當前的代碼:
MainActivity.java
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.activity_main_actions, menu);
return super.onCreateOptionsMenu(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/ic_action_search"
android:title="@string/action_search"
android:showAsAction="ifRoom"/>
<!-- Email -->
<item android:id="@+id/action_email"
android:icon="@drawable/ic_action_email"
android:title="@string/action_email"
android:showAsAction="never"/>
<!-- Help -->
<item android:id="@+id/action_help"
android:icon="@drawable/ic_action_help"
android:title="@string/action_help"
android:showAsAction="never"/>
<!-- attach -->
<item android:id="@+id/action_attach"
android:icon="@drawable/ic_action_attachment"
android:title="@string/action_attach"
android:showAsAction="never" />
最終我用以下代碼得到了答案,它是在onCreateOptionMenu()方法之后編碼的。
import android.view.ViewConfiguration;
private void getOverflowMenu(){
try {
ViewConfiguration config = ViewConfiguration.get(this);
Field menuKeyField = ViewConfiguration.class.getDeclaredField("sHasPermanentMenuKey");
if(menuKeyField != null) {
menuKeyField.setAccessible(true);
menuKeyField.setBoolean(config, false);
}
} catch (Exception e) {
e.printStackTrace();
}
}
嘗試這個:
由於將showAsAction屬性設置為never,因此這些菜單項將永遠不會顯示為動作視圖。 嘗試這個:
<item android:id="@+id/action_search"
android:icon="@drawable/ic_action_search"
android:title="@string/action_search"
android:showAsAction="ifRoom|withText"/>
<!-- Email -->
<item android:id="@+id/action_email"
android:icon="@drawable/ic_action_email"
android:title="@string/action_email"
android:showAsAction="ifRoom|withText"/>
<!-- Help -->
<item android:id="@+id/action_help"
android:icon="@drawable/ic_action_help"
android:title="@string/action_help"
android:showAsAction="ifRoom|withText"/>
<!-- attach -->
<item android:id="@+id/action_attach"
android:icon="@drawable/ic_action_attachment"
android:title="@string/action_attach"
android:showAsAction="ifRoom|withText"/>
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