如何在Android应用中创建设置屏幕? [英] How to create settings screen in android app?
问题描述
如何创建设置屏幕? 我应该使用 PreferenceActivity 还是 PreferenceFragment ?
How do I create a settings screen? Should I use PreferenceActivity or PreferenceFragment?
注意-文档没有帮助
我已经尝试过的:
- 使用 PreferenceActivity ,但无法在其中实现一个简单的工具栏.
- 使用 PreferenceFragment ,但是太复杂了,难以理解.
- Using PreferenceActivity but couldn't implement a simple toolbar in it.
- Using PreferenceFragment but was too complex to understand.
我想要的是一个使用 PreferenceFragment
推荐答案
在Android 3.0及更高版本上,您应该使用显示您的应用设置的PreferenceFragment.
On Android 3.0 and later, you should use a PreferenceFragment that displays your app settings.
创建一个SettingsFragment:
Create a SettingsFragment:
public static class SettingsFragment extends PreferenceFragment {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Load the preferences from an XML resource
addPreferencesFromResource(R.xml.preferences);
}
...
}
并在您的活动中显示它,就像其他任何片段一样:
And show it in your activity, like any other fragment:
public class SettingsActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_settings);
// Display the fragment as the main content.
getFragmentManager().beginTransaction()
.replace(android.R.id.content, new SettingsFragment())
.commit();
}
}
您可以在活动xml中包含一个工具栏,并在其下面添加一个用于SettingsFragment的容器,这样,将同时显示toolBar和您的SettingsFragment)
You can include a toolbar in your activity xml, and add a container for SettingsFragment under it, this way the toolBar and your SettingsFragment will both be shown)
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/activity_catalog_root_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="-20dp">
<com.google.android.material.appbar.AppBarLayout
android:id="@+id/fragment_catalog_first_appbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#00000000"
app:elevation="0dp"
>
<androidx.appcompat.widget.Toolbar
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/fragment_catalog_first_toolbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@color/transparent_background"
android:elevation="4dp"
>
</androidx.appcompat.widget.Toolbar>
</com.google.android.material.appbar.AppBarLayout>
<FrameLayout
android:id="@+id/activity_catalog_fragment_cont"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginTop="?android:attr/actionBarSize"
android:animateLayoutChanges="true"
app:layout_behavior="@string/appbar_scrolling_view_behavior" />
</RelativeLayout>
如果您不使用androidx(但最好使用androidx),则可以在xml中使用工具栏,例如:
If you don't use androidx (but you'd better use), you can use toolbar in your xml like:
<android.support.v7.widget.Toolbar.....>
注意:您需要使用属性android:layout_marginTop="?android:attr/actionBarSize"
(或者如果您使用的是AppCompat库:
?attr/actionBarSize
)的片段容器将显示在工具栏下
Notice: you need to use an attribute android:layout_marginTop="?android:attr/actionBarSize"
(or if you're using the AppCompat library:
?attr/actionBarSize
) for your fragment container will appear under toolbar
在您的活动中,不要忘记为工具栏覆盖onClick()方法:
Within your activity don't forget to override onClick() method for your toolbar:
toolbar.setNavigationOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
getActivity().onBackPressed();
}
});
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