如何解决FATAL EXCEPTION: main

Question

E/AndroidRuntime( 1823): FATAL EXCEPTION: main
E/AndroidRuntime( 1823): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.android.settings/com.android.settings.MultiSimSettings}: java.lang.NullPointerException
E/AndroidRuntime( 1823):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2185)
E/AndroidRuntime( 1823):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2210)
E/AndroidRuntime( 1823):  at android.app.ActivityThread.access$600(ActivityThread.java:142)
E/AndroidRuntime( 1823):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1208)
E/AndroidRuntime( 1823):  at android.os.Handler.dispatchMessage(Handler.java:99)
E/AndroidRuntime( 1823):  at android.os.Looper.loop(Looper.java:137)
E/AndroidRuntime( 1823):  at android.app.ActivityThread.main(ActivityThread.java:4931)
E/AndroidRuntime( 1823):  at java.lang.reflect.Method.invokeNative(Native Method)
E/AndroidRuntime( 1823):  at java.lang.reflect.Method.invoke(Method.java:511)
E/AndroidRuntime( 1823):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:791)
E/AndroidRuntime( 1823):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:558)
E/AndroidRuntime( 1823):  at dalvik.system.NativeStart.main(Native Method)
E/AndroidRuntime( 1823): Caused by: java.lang.NullPointerException
E/AndroidRuntime( 1823):  at com.android.settings.MultiSimSettings.onCreate(MultiSimSettings.java:107)
E/AndroidRuntime( 1823):  at android.app.Activity.performCreate(Activity.java:5008)
E/AndroidRuntime( 1823):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079)
E/AndroidRuntime( 1823):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2139)
E/AndroidRuntime( 1823):  ... 11 more

Answer 1

manifest 中是否添加了 你要打开MultiSimSettings 这个？

Answer 2

    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);        addPreferencesFromResource(R.xml.multi_sim_settings);        mVoice = (ListPreference) findPreference(KEY_VOICE);
        mVoice.setOnPreferenceChangeListener(this);
        mData = (ListPreference) findPreference(KEY_DATA);
        mData.setOnPreferenceChangeListener(this);
        mSms = (ListPreference) findPreference(KEY_SMS);
        mSms.setOnPreferenceChangeListener(this);
        mConfigSub = (PreferenceScreen) findPreference(KEY_CONFIG_SUB);
        mConfigSub.getIntent().putExtra(CONFIG_SUB, true);
        if (isAirplaneModeOn()) {
            Log.d(TAG, "Airplane mode is ON, grayout the config subscription menu!!!");
            mConfigSub.setEnabled(false);
        }
        for (int subId = 0; subId < SubscriptionManager.NUM_SUBSCRIPTIONS; subId++) {
            subManager.registerForSubscriptionActivated(subId,
                    mHandler, EVENT_SUBSCRIPTION_ACTIVATED, null);
            subManager.registerForSubscriptionDeactivated(subId,
                    mHandler, EVENT_SUBSCRIPTION_DEACTIVATED, null);
        }
    }    @Override
    protected void onResume() {
        super.onResume();        int count = subManager.getActiveSubscriptionsCount();
        if (count == SUBSCRIPTION_DUAL_STANDBY) {
            mVoice.setEntries(R.array.multi_sim_entries_voice);
            mVoice.setEntryValues(R.array.multi_sim_values_voice);
        } else  {
            mVoice.setEntries(R.array.multi_sim_entries_voice_without_prompt);
            mVoice.setEntryValues(R.array.multi_sim_values_voice_without_prompt);
        }
        mIsForeground = true;
        updateState();
    }    @Override

Answer 3

这是manifest        <!-- Multi Sim (Subscription) Settings -->
        <activity android:name="MultiSimSettings"
                android:label="@string/multi_sim_settings_title"
                android:process="com.android.phone"
                android:configChanges="mcc|mnc"
                android:clearTaskOnLaunch="true">
           <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <action android:name="com.android.settings.MULTI_SIM_SETTINGS" />
                <category android:name="android.intent.category.DEFAULT" />
                <category android:name="android.intent.category.VOICE_LAUNCH" />
                <category android:name="com.android.settings.SHORTCUT" />
            </intent-filter>
        </activity>

Answer 4

要怎么解决
具体是哪一行来着  
subManager.registerForSubscriptionActivated(subId,      //这是107行

Answer 5

要怎么解决
具体是哪一行来着  
subManager.registerForSubscriptionActivated(subId,      //这是107行
subManager有初始化么