所以我有这个偏好 Activity ，但似乎无法弄清楚如何使这项工作或是否可以完成。我的应用程序使用 Sherlock Actionbar、View-pager 和 Fragment Tabs。除了最后一个选项卡(即我的 PreferenceActivity)之外，我的所有选项卡都可以工作。
public class Prefs extends SherlockPreferenceActivity implements
OnSharedPreferenceChangeListener {
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
addPreferencesFromResource(R.xml.settings);
Preference customPref = (Preference) findPreference("clearcache");
customPref
.setOnPreferenceClickListener(new OnPreferenceClickListener() {
public boolean onPreferenceClick(Preference preference) {
Toast.makeText(getBaseContext(), "Cache Cleared",
Toast.LENGTH_LONG).show();
Webview.web.clearCache(true);
return false;
}
});
Preference customerPref1 = (Preference) findPreference("intent1");
customerPref1
.setOnPreferenceClickListener(new OnPreferenceClickListener() {
public boolean onPreferenceClick(Preference preference) {
Intent myIntent = new Intent(Prefs.this, Intent1.class);
Prefs.this.startActivity(myIntent);
return true;
}
});
这就是我的偏好 Activity 设置方式。现在，选择此选项卡时的主要问题如下。
日志记录
03-07 10:55:09.553: E/AndroidRuntime(3968): FATAL EXCEPTION: main
03-07 10:55:09.553: E/AndroidRuntime(3968): java.lang.ClassCastException: com.application.example.EditPreferences cannot be cast to android.support.v4.app.Fragment
03-07 10:55:09.553: E/AndroidRuntime(3968): at android.support.v4.app.Fragment.instantiate(Fragment.java:394)
03-07 10:55:09.553: E/AndroidRuntime(3968): at com.application.example.ABSTabsViewPagerActivity$TabsAdapter.getItem(ABSTabsViewPagerActivity.java:106)
03-07 10:55:09.553: E/AndroidRuntime(3968): at android.support.v4.app.FragmentPagerAdapter.instantiateItem(FragmentPagerAdapter.java:97)
03-07 10:55:09.553: E/AndroidRuntime(3968): at android.support.v4.view.ViewPager.addNewItem(ViewPager.java:800)
03-07 10:55:09.553: E/AndroidRuntime(3968): at android.support.v4.view.ViewPager.populate(ViewPager.java:991)
03-07 10:55:09.553: E/AndroidRuntime(3968): at android.support.v4.view.ViewPager.populate(ViewPager.java:880)
03-07 10:55:09.553: E/AndroidRuntime(3968): at android.support.v4.view.ViewPager.onMeasure(ViewPager.java:1374)
03-07 10:55:09.553: E/AndroidRuntime(3968): at android.view.View.measure(View.java:15518)
03-07 10:55:09.553: E/AndroidRuntime(3968): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4825)
03-07 10:55:09.553: E/AndroidRuntime(3968): at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
03-07 10:55:09.553: E/AndroidRuntime(3968): at android.view.View.measure(View.java:15518)
03-07 10:55:09.553: E/AndroidRuntime(3968): at android.widget.LinearLayout.measureVertical(LinearLayout.java:847)
03-07 10:55:09.553: E/AndroidRuntime(3968): at android.widget.LinearLayout.onMeasure(LinearLayout.java:588)
03-07 10:55:09.553: E/AndroidRuntime(3968): at android.view.View.measure(View.java:15518)
03-07 10:55:09.553: E/AndroidRuntime(3968): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4825)
03-07 10:55:09.553: E/AndroidRuntime(3968): at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
03-07 10:55:09.553: E/AndroidRuntime(3968): at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2176)
03-07 10:55:09.553: E/AndroidRuntime(3968): at android.view.View.measure(View.java:15518)
03-07 10:55:09.553: E/AndroidRuntime(3968): at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:1874)
03-07 10:55:09.553: E/AndroidRuntime(3968): at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1089)
03-07 10:55:09.553: E/AndroidRuntime(3968): at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1265)
03-07 10:55:09.553: E/AndroidRuntime(3968): at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:989)
03-07 10:55:09.553: E/AndroidRuntime(3968): at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:4351)
03-07 10:55:09.553: E/AndroidRuntime(3968): at android.view.Choreographer$CallbackRecord.run(Choreographer.java:749)
03-07 10:55:09.553: E/AndroidRuntime(3968): at android.view.Choreographer.doCallbacks(Choreographer.java:562)
03-07 10:55:09.553: E/AndroidRuntime(3968): at android.view.Choreographer.doFrame(Choreographer.java:532)
03-07 10:55:09.553: E/AndroidRuntime(3968): at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:735)
03-07 10:55:09.553: E/AndroidRuntime(3968): at android.os.Handler.handleCallback(Handler.java:725)
03-07 10:55:09.553: E/AndroidRuntime(3968): at android.os.Handler.dispatchMessage(Handler.java:92)
03-07 10:55:09.553: E/AndroidRuntime(3968): at android.os.Looper.loop(Looper.java:137)
03-07 10:55:09.553: E/AndroidRuntime(3968): at android.app.ActivityThread.main(ActivityThread.java:5204)
03-07 10:55:09.553: E/AndroidRuntime(3968): at java.lang.reflect.Method.invokeNative(Native Method)
03-07 10:55:09.553: E/AndroidRuntime(3968): at java.lang.reflect.Method.invoke(Method.java:511)
03-07 10:55:09.553: E/AndroidRuntime(3968): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:799)
03-07 10:55:09.553: E/AndroidRuntime(3968): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:566)
03-07 10:55:09.553: E/AndroidRuntime(3968): at dalvik.system.NativeStart.main(Native Method)
任何想法、示例、其他建议，甚至能够进行“设置”页面的其他示例，我的大多数设置只是为了其他 Activity 。
最佳答案
您正在尝试加载 Activity 来代替 fragment 。这就是为什么它给出异常(exception)。如果您的设置是简单的 Intent ，则无需将它们放入首选项 Activity 中。只需扩展 SherlockFragment 并将代码放在那里即可。
关于java - 使用 Sherlock ActionBar、Fragment Tab、ViewPager、PreferenceActivity，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/15279102/