平板电脑漏洞问题的偏好活动

时间:2014-05-09 09:03:53

标签: android tablet android-preferences android-logcat

使用Eclipse PreferenceActivity Generator,它生成了必要的文件,以便为我的应用添加设置。它适用于小型设备,但在平板电脑上崩溃。 logcat的:

05-09 10:56:45.812: E/AndroidRuntime(1823): FATAL EXCEPTION: main
05-09 10:56:45.812: E/AndroidRuntime(1823): Process: com.nextgenintl.aimassistant, PID: 1823
05-09 10:56:45.812: E/AndroidRuntime(1823): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.nextgenintl.aimassistant/com.nextgenintl.aimassistant.PrefsActivity}: java.lang.RuntimeException: Subclasses of PreferenceActivity must override isValidFragment(String) to verify that the Fragment class is valid! com.nextgenintl.aimassistant.PrefsActivity has not checked if fragment com.nextgenintl.aimassistant.SettingsActivity$GeneralPreferenceFragment is valid.
05-09 10:56:45.812: E/AndroidRuntime(1823):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2195)
05-09 10:56:45.812: E/AndroidRuntime(1823):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2245)
05-09 10:56:45.812: E/AndroidRuntime(1823):     at android.app.ActivityThread.access$800(ActivityThread.java:135)
05-09 10:56:45.812: E/AndroidRuntime(1823):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)
05-09 10:56:45.812: E/AndroidRuntime(1823):     at android.os.Handler.dispatchMessage(Handler.java:102)
05-09 10:56:45.812: E/AndroidRuntime(1823):     at android.os.Looper.loop(Looper.java:136)
05-09 10:56:45.812: E/AndroidRuntime(1823):     at android.app.ActivityThread.main(ActivityThread.java:5017)
05-09 10:56:45.812: E/AndroidRuntime(1823):     at java.lang.reflect.Method.invokeNative(Native Method)
05-09 10:56:45.812: E/AndroidRuntime(1823):     at java.lang.reflect.Method.invoke(Method.java:515)
05-09 10:56:45.812: E/AndroidRuntime(1823):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
05-09 10:56:45.812: E/AndroidRuntime(1823):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
05-09 10:56:45.812: E/AndroidRuntime(1823):     at dalvik.system.NativeStart.main(Native Method)
05-09 10:56:45.812: E/AndroidRuntime(1823): Caused by: java.lang.RuntimeException: Subclasses of PreferenceActivity must override isValidFragment(String) to verify that the Fragment class is valid! com.nextgenintl.aimassistant.PrefsActivity has not checked if fragment com.nextgenintl.aimassistant.SettingsActivity$GeneralPreferenceFragment is valid.
05-09 10:56:45.812: E/AndroidRuntime(1823):     at android.preference.PreferenceActivity.isValidFragment(PreferenceActivity.java:898)
05-09 10:56:45.812: E/AndroidRuntime(1823):     at android.preference.PreferenceActivity.switchToHeaderInner(PreferenceActivity.java:1179)
05-09 10:56:45.812: E/AndroidRuntime(1823):     at android.preference.PreferenceActivity.switchToHeader(PreferenceActivity.java:1219)
05-09 10:56:45.812: E/AndroidRuntime(1823):     at android.preference.PreferenceActivity.onCreate(PreferenceActivity.java:564)
05-09 10:56:45.812: E/AndroidRuntime(1823):     at com.nextgenintl.aimassistant.PrefsActivity.onCreate(PrefsActivity.java:46)
05-09 10:56:45.812: E/AndroidRuntime(1823):     at android.app.Activity.performCreate(Activity.java:5231)
05-09 10:56:45.812: E/AndroidRuntime(1823):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
05-09 10:56:45.812: E/AndroidRuntime(1823):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2159)
05-09 10:56:45.812: E/AndroidRuntime(1823):     ... 11 more

如果您想查看来源:

import android.annotation.TargetApi;
import android.content.Context;
import android.content.res.Configuration;
import android.media.Ringtone;
import android.media.RingtoneManager;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.preference.ListPreference;
import android.preference.Preference;
import android.preference.PreferenceActivity;
import android.preference.PreferenceCategory;
import android.preference.PreferenceFragment;
import android.preference.PreferenceManager;
import android.preference.RingtonePreference;
import android.text.TextUtils;
import android.view.MenuItem;
import android.support.v4.app.NavUtils;

import java.util.List;

/**
 * A {@link PreferenceActivity} that presents a set of application settings. On
 * handset devices, settings are presented as a single list. On tablets,
 * settings are split by category, with category headers shown to the left of
 * the list of settings.
 * <p>
 * See <a href="http://developer.android.com/design/patterns/settings.html">
 * Android Design: Settings</a> for design guidelines and the <a
 * href="http://developer.android.com/guide/topics/ui/settings.html">Settings
 * API Guide</a> for more information on developing a Settings UI.
 */
public class PrefsActivity extends PreferenceActivity {
    /**
     * Determines whether to always show the simplified settings UI, where
     * settings are presented in a single list. When false, settings are shown
     * as a master/detail two-pane view on tablets. When true, a single pane is
     * shown on tablets.
     */
    private static final boolean ALWAYS_SIMPLE_PREFS = false;

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

    /**
     * Set up the {@link android.app.ActionBar}, if the API is available.
     */
    @TargetApi(Build.VERSION_CODES.HONEYCOMB)
    private void setupActionBar() {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
            // Show the Up button in the action bar.
            getActionBar().setDisplayHomeAsUpEnabled(true);
        }
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        int id = item.getItemId();
        if (id == android.R.id.home) {
            // This ID represents the Home or Up button. In the case of this
            // activity, the Up button is shown. Use NavUtils to allow users
            // to navigate up one level in the application structure. For
            // more details, see the Navigation pattern on Android Design:
            //
            // http://developer.android.com/design/patterns/navigation.html#up-vs-back
            //
            // TODO: If Settings has multiple levels, Up should navigate up
            // that hierarchy.
            NavUtils.navigateUpFromSameTask(this);
            return true;
        }
        return super.onOptionsItemSelected(item);
    }

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

        setupSimplePreferencesScreen();
    }

    /**
     * Shows the simplified settings UI if the device configuration if the
     * device configuration dictates that a simplified, single-pane UI should be
     * shown.
     */
    private void setupSimplePreferencesScreen() {
        if (!isSimplePreferences(this)) {
            return;
        }

        // In the simplified UI, fragments are not used at all and we instead
        // use the older PreferenceActivity APIs.

        // Add 'general' preferences.
        addPreferencesFromResource(R.xml.pref_general);

        // Add 'notifications' preferences, and a corresponding header.
        PreferenceCategory fakeHeader = new PreferenceCategory(this);
        fakeHeader.setTitle(R.string.pref_header_notifications);
        getPreferenceScreen().addPreference(fakeHeader);
        addPreferencesFromResource(R.xml.pref_notification);

        // Add 'data and sync' preferences, and a corresponding header.
        fakeHeader = new PreferenceCategory(this);
        fakeHeader.setTitle(R.string.pref_header_data_sync);
        getPreferenceScreen().addPreference(fakeHeader);
        addPreferencesFromResource(R.xml.pref_data_sync);

        // Bind the summaries of EditText/List/Dialog/Ringtone preferences to
        // their values. When their values change, their summaries are updated
        // to reflect the new value, per the Android Design guidelines.
        bindPreferenceSummaryToValue(findPreference("example_text"));
        bindPreferenceSummaryToValue(findPreference("example_list"));
        bindPreferenceSummaryToValue(findPreference("notifications_new_message_ringtone"));
        bindPreferenceSummaryToValue(findPreference("sync_frequency"));
    }

    /** {@inheritDoc} */
    @Override
    public boolean onIsMultiPane() {
        return isXLargeTablet(this) && !isSimplePreferences(this);
    }

    /**
     * Helper method to determine if the device has an extra-large screen. For
     * example, 10" tablets are extra-large.
     */
    private static boolean isXLargeTablet(Context context) {
        return (context.getResources().getConfiguration().screenLayout & Configuration.SCREENLAYOUT_SIZE_MASK) >= Configuration.SCREENLAYOUT_SIZE_XLARGE;
    }

    /**
     * Determines whether the simplified settings UI should be shown. This is
     * true if this is forced via {@link #ALWAYS_SIMPLE_PREFS}, or the device
     * doesn't have newer APIs like {@link PreferenceFragment}, or the device
     * doesn't have an extra-large screen. In these cases, a single-pane
     * "simplified" settings UI should be shown.
     */
    private static boolean isSimplePreferences(Context context) {
        return ALWAYS_SIMPLE_PREFS
                || Build.VERSION.SDK_INT < Build.VERSION_CODES.HONEYCOMB
                || !isXLargeTablet(context);
    }

    /** {@inheritDoc} */
    @Override
    @TargetApi(Build.VERSION_CODES.HONEYCOMB)
    public void onBuildHeaders(List<Header> target) {
        if (!isSimplePreferences(this)) {
            loadHeadersFromResource(R.xml.pref_headers, target);
        }
    }

    /**
     * A preference value change listener that updates the preference's summary
     * to reflect its new value.
     */
    private static Preference.OnPreferenceChangeListener sBindPreferenceSummaryToValueListener = new Preference.OnPreferenceChangeListener() {
        @Override
        public boolean onPreferenceChange(Preference preference, Object value) {
            String stringValue = value.toString();

            if (preference instanceof ListPreference) {
                // For list preferences, look up the correct display value in
                // the preference's 'entries' list.
                ListPreference listPreference = (ListPreference) preference;
                int index = listPreference.findIndexOfValue(stringValue);

                // Set the summary to reflect the new value.
                preference
                        .setSummary(index >= 0 ? listPreference.getEntries()[index]
                                : null);

            } else if (preference instanceof RingtonePreference) {
                // For ringtone preferences, look up the correct display value
                // using RingtoneManager.
                if (TextUtils.isEmpty(stringValue)) {
                    // Empty values correspond to 'silent' (no ringtone).
                    preference.setSummary(R.string.pref_ringtone_silent);

                } else {
                    Ringtone ringtone = RingtoneManager.getRingtone(
                            preference.getContext(), Uri.parse(stringValue));

                    if (ringtone == null) {
                        // Clear the summary if there was a lookup error.
                        preference.setSummary(null);
                    } else {
                        // Set the summary to reflect the new ringtone display
                        // name.
                        String name = ringtone
                                .getTitle(preference.getContext());
                        preference.setSummary(name);
                    }
                }

            } else {
                // For all other preferences, set the summary to the value's
                // simple string representation.
                preference.setSummary(stringValue);
            }
            return true;
        }
    };

    /**
     * Binds a preference's summary to its value. More specifically, when the
     * preference's value is changed, its summary (line of text below the
     * preference title) is updated to reflect the value. The summary is also
     * immediately updated upon calling this method. The exact display format is
     * dependent on the type of preference.
     * 
     * @see #sBindPreferenceSummaryToValueListener
     */
    private static void bindPreferenceSummaryToValue(Preference preference) {
        // Set the listener to watch for value changes.
        preference
                .setOnPreferenceChangeListener(sBindPreferenceSummaryToValueListener);

        // Trigger the listener immediately with the preference's
        // current value.
        sBindPreferenceSummaryToValueListener.onPreferenceChange(
                preference,
                PreferenceManager.getDefaultSharedPreferences(
                        preference.getContext()).getString(preference.getKey(),
                        ""));
    }

    /**
     * This fragment shows general preferences only. It is used when the
     * activity is showing a two-pane settings UI.
     */
    @TargetApi(Build.VERSION_CODES.HONEYCOMB)
    public static class GeneralPreferenceFragment extends PreferenceFragment {
        @Override
        public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            addPreferencesFromResource(R.xml.pref_general);

            // Bind the summaries of EditText/List/Dialog/Ringtone preferences
            // to their values. When their values change, their summaries are
            // updated to reflect the new value, per the Android Design
            // guidelines.
            bindPreferenceSummaryToValue(findPreference("example_text"));
            bindPreferenceSummaryToValue(findPreference("example_list"));
        }
    }

    /**
     * This fragment shows notification preferences only. It is used when the
     * activity is showing a two-pane settings UI.
     */
    @TargetApi(Build.VERSION_CODES.HONEYCOMB)
    public static class NotificationPreferenceFragment extends
            PreferenceFragment {
        @Override
        public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            addPreferencesFromResource(R.xml.pref_notification);

            // Bind the summaries of EditText/List/Dialog/Ringtone preferences
            // to their values. When their values change, their summaries are
            // updated to reflect the new value, per the Android Design
            // guidelines.
            bindPreferenceSummaryToValue(findPreference("notifications_new_message_ringtone"));
        }
    }

    /**
     * This fragment shows data and sync preferences only. It is used when the
     * activity is showing a two-pane settings UI.
     */
    @TargetApi(Build.VERSION_CODES.HONEYCOMB)
    public static class DataSyncPreferenceFragment extends PreferenceFragment {
        @Override
        public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            addPreferencesFromResource(R.xml.pref_data_sync);

            // Bind the summaries of EditText/List/Dialog/Ringtone preferences
            // to their values. When their values change, their summaries are
            // updated to reflect the new value, per the Android Design
            // guidelines.
            bindPreferenceSummaryToValue(findPreference("sync_frequency"));
        }
    }
}

XML似乎没有任何错误,因为字符串是在替代文件中生成的(例如string_activity_prefs.xml),并且可以在手机上正常工作。

2 个答案:

答案 0 :(得分:0)

Subclasses of PreferenceActivity must override isValidFragment(String) to verify that the Fragment class is valid! com.nextgenintl.aimassistant.PrefsActivity has not checked if fragment com.nextgenintl.aimassistant.SettingsActivity$GeneralPreferenceFragment is valid.

覆盖isValidFragment(String)的{​​{1}}中的onCreate()

答案 1 :(得分:0)

您可以在isValidFragment(String)

中覆盖PreferenceActivity
protected boolean isValidFragment (String fragmentName) {

    if(PrefsActivity.class.getName().equals(fragmentName)){         

         return true; 

    }     
    return false; 
}

有关详细信息,请阅读此A New Vulnerability in the Android Framework: Fragment Injection