安卓:从preferenceActivity推出定制preference [英] Android: launch a custom Preference from a PreferenceActivity
问题描述
我希望能够推出从我的preferenceActivity第2 preference屏幕。而在第2 preference屏幕我想用predefined布局的XML。所以,我有两个问题:
I would like to be able launch a 2nd Preference screen from my PreferenceActivity. And in the 2nd Preference screen I'd like to use a predefined layout from xml. So, I have two questions:
我如何使用XML布局的preference布局有何看法? 如何添加这个定制preference到preferenceActivity,从而推出了挖掘什么时候?
How do I use an xml layout as the layout view of a Preference? How do I add this custom preference to a PreferenceActivity such that launched when tapped?
感谢您
*编辑回应的不在场证明。
*EDIT in response to alibi
我想从preference屏幕发起一项活动,宣布在XML中推出的活动。这将导致此异常:
I am trying to launch an activity from a preference screen, by declaring the activity to be launched in xml. This causes this exception:
04-01 19:04:37.962: ERROR/AndroidRuntime(8061): android.content.ActivityNotFoundException: Unable to find explicit activity class {com.me/CustomPrefScreen}; have you declared this activity in your AndroidManifest.xml?
*另一个更新。不过,如果我更换prefrenceScreen在settings.xml中的一些扩展preference,它覆盖的onClick()合作推出定制prefScreen,然后一切工作正常。
*Another update. However, if I replace PrefrenceScreen in settings.xml with some extension of Preference, which overrides onClick() to launch CustomPrefScreen, then everything works fine.
主要preferences活动:
Main preferences activity:
public class MyPreferences extends PreferenceActivity
{
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
addPreferencesFromResource(R.xml.settings);
}
}
的settings.xml
settings.xml
<?xml version="1.0" encoding="utf-8"?>
<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">
<PreferenceScreen
android:summary="my summary"
android:title="my title">
<intent android:action="android.intent.action.MAIN"
android:targetPackage="com.me"
android:targetClass="CustomPrefScreen"/>
</PreferenceScreen>
</PreferenceScreen>
mainfest文件
mainfest file
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.me"
android:versionCode="1"
android:versionName="1.0">
<application
android:icon="@drawable/icon"
android:label="@string/app_name"
android:theme="@style/Theme.NoBackground">
<activity
android:name=".MyApp"
android:label="@string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".CustomPrefScreen"
android:label="@string/app_name">
</activity>
<activity
android:name=".MyPreferences"
android:label="@string/app_name">
</activity>
</application>
<uses-sdk android:minSdkVersion="4" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
</manifest>
推荐答案
一个解决办法是,延长一个对话框preference其允许为preference对话框自定义布局设置。这样,你有preference上市,当你点击它,你会得到一个对话框,您的自定义设置界面。
One solution would be to extend a DialogPreference which allows the setting of a custom layout for the preference dialog. This way you have a preference listed and when you tap it, you get a dialog with your custom settings UI.
<com.xyz.MyPreference
android:dialogLayout="@layout/yourlayout"
android:dialogTitle="Dialog Title"
android:dialogMessage="Dialog summary"
android:key="preference_key"
android:title="Preference Title"
android:summary="Preference summary"
android:defaultValue="Default Value" />
和类
class MyPreference extends DialogPreference {
// along with constructors, you will want to override
@Override
protected void onBindDialogView(View view) {
super.onBindDialogView(view);
// view is your layout expanded and added to the dialog
// find and hang on to your views here, add click listeners etc
// basically things you would do in onCreate
mTextView = (TextView)view.findViewById(R.Id.mytextview);
}
@Override
protected void onDialogClosed(boolean positiveResult) {
super.onDialogClosed(positiveResult);
if (positiveResult) {
// deal with persisting your values here
}
}
}
显然还有其它的一些细节,但是这是基本的想法。
Obviously there are some other details, but this is the basic idea.
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