从preference报头开始活动 [英] Start activity from preference-headers

问题描述

我实施n层preferenceActivities 第一层preferenceActivity从preference报头加载。

第一头创建的设置，这是preferenceFragment片段。第二是一个浏览器的活动（第二距离developer.android.com一个例子），其打开指定地址。第三个我想那也将从preference报头装preferenceAtivity一个新的水平。

一两项工作正常，但第三崩溃，除了一个应用程序：

android.content.ActivityNotFoundException：无活动处理意向{行为= android.intent.action.VIEW DAT = com.mycompany.myapp.ui.My preferenceActivity}

我的preferenceActivity申报清单文件中。大概声明main_headers.xml活动是错的，但我没有发现任何引用提示如何做到这一点是正确的。试了一些变化，他们没有工作。

例如我用：<一href="http://developer.android.com/reference/android/$p$pference/$p$pferenceActivity.html">http://developer.android.com/reference/android/$p$pference/$p$pferenceActivity.html

有什么想法，为什么它不工作对我来说还是怎么下preferenceActivity可以被称为？ 基本上，我只需要开始从头部的活动，这应该是很简单的，但我失去了一些东西。

 公共类MySettings扩展preferenceActivity
{
    @覆盖
    公共无效onBuildHeaders（名单＆LT;头＆GT;目标）
    {
        loadHeadersFromResource（R.xml.main_headers，目标）;
    }
}
 

main_headers.xml：

 ＆LT; XML版本=1.0编码=UTF-8＆GT？;
＆LT; preference报头
    的xmlns：机器人=htt​​p://schemas.android.com/apk/res/android＆GT;

    ＆LT;头安卓标题=自定义设置
        机器人：片段=com.mycompany.myapp.ui.SettingsFragment/＆GT;

    ＆LT;头安卓标题=意图
        机器人：总结=启动的意图。＆GT;
        ＆LT;意图安卓行动=android.intent.action.VIEW
                机器人：数据=htt​​p://www.android.com/＆GT;
    ＆LT; /头＆GT;

    ＆LT;头安卓标题=另一个preference活动＆GT;
        ＆LT;意图安卓行动=android.intent.action.VIEW
            机器人：数据=com.mycompany.myapp.ui.My preferenceActivity/＆GT;
    ＆LT; /头＆GT;
＆LT; / preference报头＆GT;
 

解决方案

如果你想从你的第三个preference启动一个明确的活动，然后做到这一点：

 ＆LT;意向安卓targetPackage =com.mycompany.myapp
        机器人：targetClass =com.mycompany.myapp.ui.My preferenceActivity/＆GT;
 

I'm implementing n-layer PreferenceActivities 1st layer PreferenceActivity is loaded from preference-headers.

First header creates fragment of settings which is a PreferenceFragment. Second is a browser activity (2nd is an example from developer.android.com) which opens specified Url. The third one I want to be a next level of PreferenceAtivity that also will be loaded from preference-headers.

First two work fine but 3rd is crashing an app with the exception:

"android.content.ActivityNotFoundException: No Activity found to handle Intent { act=android.intent.action.VIEW dat=com.mycompany.myapp.ui.MyPreferenceActivity} "

MyPreferenceActivity declared in the manifest file. Probably declaration of activity in main_headers.xml is wrong, but I didn't find in references any tip how to do it correct. Tried several variations, they didn't work.

Example I used: http://developer.android.com/reference/android/preference/PreferenceActivity.html

Any thoughts why it doesn't work for me or how the next PreferenceActivity can be called? Basically I just need to start an activity from header, that should be really simple but I'm missing something.

public class MySettings extends PreferenceActivity 
{
    @Override
    public void onBuildHeaders(List<Header> target) 
    {
        loadHeadersFromResource(R.xml.main_headers, target);
    }
}

main_headers.xml:

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

    <header android:title="Custom Settings"
        android:fragment="com.mycompany.myapp.ui.SettingsFragment" />

    <header android:title="Intent"
        android:summary="Launches an Intent.">
        <intent android:action="android.intent.action.VIEW"
                android:data="http://www.android.com" />
    </header>

    <header android:title="Another Preference Activity">
        <intent android:action="android.intent.action.VIEW"
            android:data="com.mycompany.myapp.ui.MyPreferenceActivity" />
    </header>
</preference-headers>

解决方案

If you want to start an explicit Activity from your third preference then do this:

<intent android:targetPackage="com.mycompany.myapp"
        android:targetClass="com.mycompany.myapp.ui.MyPreferenceActivity" />

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