Android 滚动时ListPreference崩溃

给定我的

res/xml/preferences.xml

如下所示：

<?xml version="1.0" encoding="utf-8"?>
<PreferenceScreen
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:orderingFromXml="true">
    ... 
    <PreferenceCategory android:title="@string/reminders">
        <ListPreference
                android:key="PREF_BATTERY_LOW"
                android:title="@string/battery_low"
                android:summary="@string/battery_low_desc"
                android:entries="@array/battery_strings"
                android:entryValues="@array/battery_values"
                android:dialogTitle="@string/battery_low"
                android:defaultValue="25"
                />
    </PreferenceCategory>
    ...
</PreferenceScreen>

import android.preference.PreferenceActivity;

public class SettingsActivity extends PreferenceActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        addPreferencesFromResource(R.xml.preferences);
    }
}

<string-array name="battery_values">
    <item>5</item>
    <item>10</item>
    <item>15</item>
    <item>20</item>
    <item>25</item>
    <item>30</item>
    <item>40</item>
    <item>50</item>
</string-array>

<string-array name="battery_strings">
    <item>5 %</item>
    <item>10 %</item>
    <item>15 %</item>
    <item>20 %</item>
    <item>25 %</item>
    <item>30 %</item>
    <item>40 %</item>
    <item>50 %</item>
</string-array>

E/InputEventReceiver(28227): Exception dispatching input event.
D/AndroidRuntime(28227): Shutting down VM
W/dalvikvm(28227): threadid=1: thread exiting with uncaught exception (group=0xa613b908)
I/AndroidRuntime(28227): VM exiting with result code 99, cleanup skipped.
I/ActivityManager(  432): Process com.company.app (pid 28227) has died.
D/dalvikvm(28249): Late-enabling CheckJNI
W/ActivityManager(  432): Scheduling restart of crashed service com.company.app/.services.LocationService in 5000ms
W/ActivityManager(  432): Force removing ActivityRecord{a6bfe408 u0 com.company.app/.SettingsActivity}: app died, no saved state
I/WindowState(  432): WIN DEATH: Window{a6cb7078 u0 com.company.app/com.company.app.main.MainActivity}
I/WindowState(  432): WIN DEATH: Window{a6cfea00 u0 com.company.app/com.company.app.SettingsActivity}
I/ActivityManager(  432): Start proc com.company.app for activity com.company.app/.main.MainActivity: pid=28249 uid=10064 gids={50064, 3003, 1028}
D/Zygote  (  160): Process 28227 exited cleanly (99)
E/Trace   (28249): error opening trace file: No such file or directory (2)
E/jdwp    (28249): Failed sending reply to debugger: Broken pipe
D/dalvikvm(28249): Debugger has detached; object registry had 1 entries
D/dalvikvm(28249): GC_FOR_ALLOC freed 126K, 2% free 8781K/8960K, paused 3ms, total 3ms
D/libEGL  (28249): loaded /system/lib/egl/libEGL_emulation.so
D/        (28249): HostConnection::get() New Host Connection established 0xb78b4fd8, tid 28249
D/libEGL  (28249): loaded /system/lib/egl/libGLESv1_CM_emulation.so
D/libEGL  (28249): loaded /system/lib/egl/libGLESv2_emulation.so
W/EGL_emulation(28249): eglSurfaceAttrib not implemented
D/OpenGLRenderer(28249): Enabling debug mode 0

src/main/res/values/array.xml如下所示：

<?xml version="1.0" encoding="utf-8"?>
<PreferenceScreen
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:orderingFromXml="true">
    ... 
    <PreferenceCategory android:title="@string/reminders">
        <ListPreference
                android:key="PREF_BATTERY_LOW"
                android:title="@string/battery_low"
                android:summary="@string/battery_low_desc"
                android:entries="@array/battery_strings"
                android:entryValues="@array/battery_values"
                android:dialogTitle="@string/battery_low"
                android:defaultValue="25"
                />
    </PreferenceCategory>
    ...
</PreferenceScreen>

import android.preference.PreferenceActivity;

public class SettingsActivity extends PreferenceActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        addPreferencesFromResource(R.xml.preferences);
    }
}

<string-array name="battery_values">
    <item>5</item>
    <item>10</item>
    <item>15</item>
    <item>20</item>
    <item>25</item>
    <item>30</item>
    <item>40</item>
    <item>50</item>
</string-array>

<string-array name="battery_strings">
    <item>5 %</item>
    <item>10 %</item>
    <item>15 %</item>
    <item>20 %</item>
    <item>25 %</item>
    <item>30 %</item>
    <item>40 %</item>
    <item>50 %</item>
</string-array>

E/InputEventReceiver(28227): Exception dispatching input event.
D/AndroidRuntime(28227): Shutting down VM
W/dalvikvm(28227): threadid=1: thread exiting with uncaught exception (group=0xa613b908)
I/AndroidRuntime(28227): VM exiting with result code 99, cleanup skipped.
I/ActivityManager(  432): Process com.company.app (pid 28227) has died.
D/dalvikvm(28249): Late-enabling CheckJNI
W/ActivityManager(  432): Scheduling restart of crashed service com.company.app/.services.LocationService in 5000ms
W/ActivityManager(  432): Force removing ActivityRecord{a6bfe408 u0 com.company.app/.SettingsActivity}: app died, no saved state
I/WindowState(  432): WIN DEATH: Window{a6cb7078 u0 com.company.app/com.company.app.main.MainActivity}
I/WindowState(  432): WIN DEATH: Window{a6cfea00 u0 com.company.app/com.company.app.SettingsActivity}
I/ActivityManager(  432): Start proc com.company.app for activity com.company.app/.main.MainActivity: pid=28249 uid=10064 gids={50064, 3003, 1028}
D/Zygote  (  160): Process 28227 exited cleanly (99)
E/Trace   (28249): error opening trace file: No such file or directory (2)
E/jdwp    (28249): Failed sending reply to debugger: Broken pipe
D/dalvikvm(28249): Debugger has detached; object registry had 1 entries
D/dalvikvm(28249): GC_FOR_ALLOC freed 126K, 2% free 8781K/8960K, paused 3ms, total 3ms
D/libEGL  (28249): loaded /system/lib/egl/libEGL_emulation.so
D/        (28249): HostConnection::get() New Host Connection established 0xb78b4fd8, tid 28249
D/libEGL  (28249): loaded /system/lib/egl/libGLESv1_CM_emulation.so
D/libEGL  (28249): loaded /system/lib/egl/libGLESv2_emulation.so
W/EGL_emulation(28249): eglSurfaceAttrib not implemented
D/OpenGLRenderer(28249): Enabling debug mode 0

没有进一步的stacktrace或任何其他有用的日志信息。 我一直在尝试删除启动时的首选项（工作，但没有用），更改其类型（不支持），更改键和字符串类型，删除属性，但应用程序仍然崩溃

---

上面几行我使用了另一个ListPreference，它工作得很好，只是这一行带来了麻烦。有什么我遗漏的吗？

感谢@shoerat指出上面的代码中没有明显的问题，再加上缺少堆栈跟踪，我想知道这是否是一些内部异常，被捕获但没有发送到“up”。调试这个的一个好方法是（在Android Studio中）：

• 打开运行>查看断点
• 启用异常断点>任何异常
• 查找java.util.Formatter.checkFlags抛出的FormatFlagsConversionMismatchException异常在任何地方都不可见
• 跟踪到ListPreference.getSummary：

  @Override
  public CharSequence getSummary() {
      final CharSequence entry = getEntry();
      if (mSummary == null || entry == null) {
          return super.getSummary();
      } else {
          return String.format(mSummary, entry);
      }
  }
  

• 检查摘要格式字符串并发现其包含非法内容（单个%而不是%%）

• 将格式字符串更改为包含%%或%s（包括当前值）

---

stacktrace中应该还有更多内容。。。如果在Logcat中选择错误日志类型，它是否会显示更多信息？日志通过“adb Logcat”来自命令行。XML的根可能不是

首选项类别

？应该是

PreferenceScreen

@shoerat，谢谢你的提示，但它是根节点的

PreferenceScreen

。你在这里真正的意思是

res/values/array.xml

，对吗？src/values/array.xml如下所示：您可能希望发布整个

首选项.xml

（和其他相关资源），如下所示：1）设置活动中没有明显的问题，2）发布的堆栈跟踪不完整，3）无法重现问题