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添加一个按钮以preferences屏幕底部

本文介绍了添加一个按钮以preferences屏幕底部的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

限时删除！！

尽管@stealthcopter（检查答案由@Andrew制造）在这个问题上的，我不能想象一个按钮，在我活动的底部。

Despite the content of the comment of @stealthcopter (check answer made by @Andrew) in this question How to add a button to PreferenceScreen, I am not able to visualise a button in the bottom part of my activity.

.apk文件将出现以下错误崩溃的应用程序：不幸的是your_app已停止工作

The application .apk will crash with the following error: Unfortunately your_app has stopped working!

下面是崩溃的堆栈跟踪：

Here is the stack trace from the crash:

05-25 21:26:39.431: I/dalvikvm(1405): threadid=3: reacting to signal 3
05-25 21:26:39.462: I/dalvikvm(1405): Wrote stack traces to '/data/anr/traces.txt'
05-25 21:26:44.851: I/Process(1405): Sending signal. PID: 1405 SIG: 9
05-25 21:40:51.442: I/dalvikvm(1936): threadid=3: reacting to signal 3
05-25 21:40:51.601: I/dalvikvm(1936): Wrote stack traces to '/data/anr/traces.txt'
05-25 21:40:51.951: I/dalvikvm(1936): threadid=3: reacting to signal 3
05-25 21:40:52.001: I/dalvikvm(1936): Wrote stack traces to '/data/anr/traces.txt'
05-25 21:40:52.472: I/dalvikvm(1936): threadid=3: reacting to signal 3
05-25 21:40:52.561: I/dalvikvm(1936): Wrote stack traces to '/data/anr/traces.txt'
05-25 21:40:52.631: D/dalvikvm(1936): GC_CONCURRENT freed 172K, 4% free 9313K/9607K, paused 7ms+7ms
05-25 21:40:52.691: D/gralloc_goldfish(1936): Emulator without GPU emulation detected.
05-25 21:40:54.372: D/AndroidRuntime(1936): Shutting down VM
05-25 21:40:54.372: W/dalvikvm(1936): threadid=1: thread exiting with uncaught exception (group=0x409c01f8)
05-25 21:40:54.422: E/AndroidRuntime(1936): FATAL EXCEPTION: main
05-25 21:40:54.422: E/AndroidRuntime(1936): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.DVA_HLUI/com.DVA_HLUI.DVA_HLUIPrefsActivity}: java.lang.RuntimeException: Your content must have a ListView whose id attribute is 'android.R.id.list'
05-25 21:40:54.422: E/AndroidRuntime(1936):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1956)
05-25 21:40:54.422: E/AndroidRuntime(1936):     at android.app.ActivityThread.startActivityNow(ActivityThread.java:1797)
05-25 21:40:54.422: E/AndroidRuntime(1936):     at android.app.LocalActivityManager.moveToState(LocalActivityManager.java:135)
05-25 21:40:54.422: E/AndroidRuntime(1936):     at android.app.LocalActivityManager.startActivity(LocalActivityManager.java:347)
05-25 21:40:54.422: E/AndroidRuntime(1936):     at android.widget.TabHost$IntentContentStrategy.getContentView(TabHost.java:682)
05-25 21:40:54.422: E/AndroidRuntime(1936):     at android.widget.TabHost.setCurrentTab(TabHost.java:346)
05-25 21:40:54.422: E/AndroidRuntime(1936):     at android.widget.TabHost$2.onTabSelectionChanged(TabHost.java:150)
05-25 21:40:54.422: E/AndroidRuntime(1936):     at android.widget.TabWidget$TabClickListener.onClick(TabWidget.java:540)
05-25 21:40:54.422: E/AndroidRuntime(1936):     at android.view.View.performClick(View.java:3511)
05-25 21:40:54.422: E/AndroidRuntime(1936):     at android.view.View$PerformClick.run(View.java:14105)
05-25 21:40:54.422: E/AndroidRuntime(1936):     at android.os.Handler.handleCallback(Handler.java:605)
05-25 21:40:54.422: E/AndroidRuntime(1936):     at android.os.Handler.dispatchMessage(Handler.java:92)
05-25 21:40:54.422: E/AndroidRuntime(1936):     at android.os.Looper.loop(Looper.java:137)
05-25 21:40:54.422: E/AndroidRuntime(1936):     at android.app.ActivityThread.main(ActivityThread.java:4424)
05-25 21:40:54.422: E/AndroidRuntime(1936):     at java.lang.reflect.Method.invokeNative(Native Method)
05-25 21:40:54.422: E/AndroidRuntime(1936):     at java.lang.reflect.Method.invoke(Method.java:511)
05-25 21:40:54.422: E/AndroidRuntime(1936):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
05-25 21:40:54.422: E/AndroidRuntime(1936):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
05-25 21:40:54.422: E/AndroidRuntime(1936):     at dalvik.system.NativeStart.main(Native Method)
05-25 21:40:54.422: E/AndroidRuntime(1936): Caused by: java.lang.RuntimeException: Your content must have a ListView whose id attribute is 'android.R.id.list'
05-25 21:40:54.422: E/AndroidRuntime(1936):     at android.app.ListActivity.onContentChanged(ListActivity.java:243)
05-25 21:40:54.422: E/AndroidRuntime(1936):     at android.preference.PreferenceActivity.onContentChanged(PreferenceActivity.java:944)
05-25 21:40:54.422: E/AndroidRuntime(1936):     at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:254)
05-25 21:40:54.422: E/AndroidRuntime(1936):     at android.app.Activity.setContentView(Activity.java:1835)
05-25 21:40:54.422: E/AndroidRuntime(1936):     at com.DVA_HLUI.DVA_HLUIPrefsActivity.onCreate(DVA_HLUIPrefsActivity.java:15)
05-25 21:40:54.422: E/AndroidRuntime(1936):     at android.app.Activity.performCreate(Activity.java:4465)
05-25 21:40:54.422: E/AndroidRuntime(1936):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049)
05-25 21:40:54.422: E/AndroidRuntime(1936):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1920)
05-25 21:40:54.422: E/AndroidRuntime(1936):     ... 18 more

下面是活动的java类崩溃：

Here is the activity java class that crashes:

public class DVA_HLUIPrefsActivity extends PreferenceActivity
{
   @Override
   public void onCreate(Bundle savedInstanceState)
   {
        super.onCreate(savedInstanceState);
        addPreferencesFromResource(R.xml.prefs);
        setContentView(R.layout.preferences);
   }
}

下面是它的布局文件：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical">

    <ListView
        android:id="@+id/list"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" android:layout_weight="1">
    </ListView>

    <LinearLayout
        android:layout_width="fill_parent"
        android:layout_height="wrap_content">

        <Button
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:text="Quit!" android:layout_weight="0.5"android:layout_gravity="center_vertical"
         />

        <Button
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:text="Help" android:layout_weight="0.5" android:layout_gravity="center_vertical"
         />

    </LinearLayout>

</LinearLayout>

最后，这是preferences XML资源：

and finally this is the preferences xml resource:

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

    <Preference android:key="about" android:title="@string/titleAbout" android:summary="@string/summaryAbout" />


</PreferenceScreen>

能否请您解释我是什么导致应用程序崩溃的冲突？

Can you please explain me what is the conflict that causes the application to crash?

推荐答案

您必须包括与ID @android一个ListView：ID /列表像它说​​，在问题您链接到（见答案）。

You have to include a ListView with the id @android:id/list like it says in the question you linked to (See Answer).

从Android的布局文件（R.Layout preferences）删除您＆LT; ListView控件＆GT; 键，把它放进它的位置

From your android layout file (R.Layout.Preferences) remove your <ListView> and put this in it's place.

<ListView android:id="@android:id/list"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent" />

这应该解决您遇到的问题。

That should solve the problem you were having.

从您发布的LogCat中：产生的原因：java.lang.RuntimeException的：你的内容必须有一个ListView，其id属性是'android.R.id.list

From the LogCat you posted:Caused by: java.lang.RuntimeException: Your content must have a ListView whose id attribute is 'android.R.id.list'

编辑：只是一些澄清的ListView id属性。从 Android的XML布局。

Just some clarification of the id attribute on the ListView. From Android XML Layouts.

的语法为ID，内部的XML标签是：

The syntax for an ID, inside an XML tag is:

机器人：ID =@ + ID / my_button

android:id="@+id/my_button"

该符号（@）在字符串的开头表示XM​​L解析器应该解析和扩展ID字符串的其余部分，将其识别为一个ID资源。的加号（+）指这是必须创建并添加到我们的资源（在R.java文件）的新的资源名。有一些是由Android框架提供的其他标识资源。当引用一个Android资源ID，你不需要加符号，但必须加上Android包名称空间，像这样：

The at-symbol (@) at the beginning of the string indicates that the XML parser should parse and expand the rest of the ID string and identify it as an ID resource. The plus-symbol (+) means that this is a new resource name that must be created and added to our resources (in the R.java file). There are a number of other ID resources that are offered by the Android framework. When referencing an Android resource ID, you do not need the plus-symbol, but must add the android package namespace, like so:

机器人：ID =@机器人：ID /空

android:id="@android:id/empty"

有了Android包名称空间，我们现在从android.R资源类引用一个ID，而不是本地资源类。

这篇关于添加一个按钮以preferences屏幕底部的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！

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