我最近遇到了这个问题,这就是我解决它的方式。首先,要访问首选项屏幕,我使用与您上面提到的完全相同的方法。
@Override
public boolean onPreferenceTreeClick(PreferenceScreen preferenceScreen, Preference preference) {
super.onPreferenceTreeClick(preferenceScreen, preference);
// If the user has clicked on a preference screen, set up the action bar
if (preference instanceof PreferenceScreen) {
initializeActionBar((PreferenceScreen) preference);
}
return false;
}
从这里我开始研究什么是PreferencesScreen,我很伤心地发现它只是一个对话框的包装器。接下来,我设置操作栏显示选项并尝试找到主页按钮区域。不幸的是,这并不容易获得,但是在层次结构查看器的帮助下,我设法通过找到主页图标,然后找到其父视图来访问。一旦我们可以访问包含的LinearLayout,我们就可以附加一个onClickListener,在那里我们关闭了PreferencesScreen的对话框,该对话框调用了OptiveScreen的onDismissListener并将我们返回到上一个屏幕。
/** Sets up the action bar for an {@link PreferenceScreen} */
public static void initializeActionBar(PreferenceScreen preferenceScreen) {
final Dialog dialog = preferenceScreen.getDialog();
if (dialog != null) {
// Inialize the action bar
dialog.getActionBar().setDisplayHomeAsUpEnabled(true);
// Apply custom home button area click listener to close the PreferenceScreen because PreferenceScreens are dialogs which swallow
// events instead of passing to the activity
// Related Issue: https://code.google.com/p/android/issues/detail?id=4611
View homeBtn = dialog.findViewById(android.R.id.home);
if (homeBtn != null) {
OnClickListener dismissDialogClickListener = new OnClickListener() {
@Override
public void onClick(View v) {
dialog.dismiss();
}
};
// Prepare yourselves for some hacky programming
ViewParent homeBtnContainer = homeBtn.getParent();
// The home button is an ImageView inside a FrameLayout
if (homeBtnContainer instanceof FrameLayout) {
ViewGroup containerParent = (ViewGroup) homeBtnContainer.getParent();
if (containerParent instanceof LinearLayout) {
// This view also contains the title text, set the whole view as clickable
((LinearLayout) containerParent).setOnClickListener(dismissDialogClickListener);
} else {
// Just set it on the home button
((FrameLayout) homeBtnContainer).setOnClickListener(dismissDialogClickListener);
}
} else {
// The 'If all else fails' default case
homeBtn.setOnClickListener(dismissDialogClickListener);
}
}
}
}