java - ListView Android 因运行时异常而崩溃

Question

无论我做什么，我的 ListView 似乎都会崩溃。这是通过的代码 bundle 到列表处理 Activity NotificationList

Bundle extras= new Bundle();
Intent  intent= new Intent(Locations.this, NotificationList.class);
extras.putString("name0", "Robowars");
extras.putString("name1", "Robowa");

extras.putString("time0", "1:40");
extras.putString("time1", "1:30");

extras.putString("place0", "ekm");
extras.putString("place1", "ekm2");

extras.putString("id0","my id");
extras.putString("id1", "new id");

extras.putString("type0", "tech");
extras.putString("type1", "cult");

extras.putString("count", "1");
intent.putExtras(extras);
startActivity(intent);

这是我的 NotificationList 的代码:

public class NotificationList extends ActionBarActivity {

String listName[],listPlace[],listTime[],listId[],listType[];
ListView listview;
String count;


Intent intent;
@Override
protected void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stub

    super.onCreate(savedInstanceState);
    setContentView(R.layout.culturallist);

    intent= getIntent();

      //  TypedArray listThumbnail;
        listview = (ListView) findViewById(R.id.list);


    count=intent.getExtras().getString("count");
    int n=Integer.parseInt(count);
    for (int  i=0;i<=n;++i)
    {
        listName[i]= intent.getExtras().getString("name"+String.valueOf(i));
        listPlace[i]=intent.getExtras().getString("place"+String.valueOf(i));
        listTime[i]=intent.getExtras().getString("time"+String.valueOf(i));    
        listId[i]=intent.getExtras().getString("id"+i);
        listType[i]=intent.getExtras().getString("type"+String.valueOf(i));

    //    Toast.makeText(NotificationList.this, listName[i], Toast.LENGTH_LONG).show();
    }

    listview.setAdapter(new NotifListAdapter(NotificationList.this,listName,listPlace,listTime,listType,listId));


    /*AsyncList list= new AsyncList();
    list.execute();*/

      listview.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> adapterView, View view, int j, long l) {


            Intent intent= new Intent(NotificationList.this,CardActivity.class);
                Bundle extras= new Bundle();

                String id = ((TextView)findViewById(R.id.id)).toString();
                String type = ((TextView) findViewById(R.id.eventtype)).toString();

                extras.putString("key", id);
        extras.putString("eventtype", type);

                intent.putExtras(extras);
                startActivity(intent);
            }
        });
    }

}

这是自定义适配器:

    class NotifFonts{
    private static Typeface typeFace;

    public static Typeface getTypeFace(Context mContext){

            if(typeFace==null)
            {
                typeFace = Typeface.createFromAsset(mContext.getAssets(), "fonts/robotolight.ttf");
            }

        return typeFace;
    }
}

class NotifListAdapter extends BaseAdapter {

    static class ViewHolder{
        TextView title,place,time,id,type;

    }

    private String[] listName,listId,listType,listPlace,listTime;

    private  Context context;

    private static LayoutInflater inflater = null;

    public NotifListAdapter(Context context,
            String[] listName, String[] listPlace, String[] listTime,
            String[] listType, String[] listId) {


        this.listId=listId;
        this.listName=listName;
        this.listPlace=listPlace;
        this.listTime=listTime;
        this.listType=listType;

        inflater = (LayoutInflater) context
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    }

    @Override
    public int getCount() {
        // TODO Auto-generated method stub
        return listName.length;
    }

    @Override
    public Object getItem(int position) {
        // TODO Auto-generated method stub
        return listName[position];
    }


    @Override
    public long getItemId(int position) {
        // TODO Auto-generated method stub
        return position;
    }

    @Override
    public View getView(int position, View vi, ViewGroup parent) {

        ViewHolder holder;
        if (vi == null) 

        {
            holder=new ViewHolder();
            vi = inflater.inflate(R.layout.list_row_notif,null);
         holder.title = (TextView) vi.findViewById(R.id.name); 
         holder.place=(TextView) vi.findViewById(R.id.place); 
         holder.time=(TextView) vi.findViewById(R.id.time); 
         holder.id=(TextView) vi.findViewById(R.id.id);
         holder.type=(TextView) vi.findViewById(R.id.eventtype);
    //     holder.thumbnail=(ImageView) vi.findViewById(R.id.list_image);  
            vi.setTag(holder);
        }
        else
        {
            holder=(ViewHolder) vi.getTag();
        }


     try {
        holder.title.setTypeface(NotifFonts.getTypeFace(context));
         holder.place.setTypeface(NotifFonts.getTypeFace(context));

     holder.title.setText(listName[position]);    
          //  holder.thumbnail.setImageResource(listThumbnail.getResourceId(position, -1));
     holder.time.setText(listTime[position]);
     holder.place.setText(listPlace[position]);
     holder.id.setText(listId[position]);
     holder.type.setText(listType[position]);
    } catch (Exception e) {

        e.printStackTrace();
    }

        return vi;
    }
}

Logcat 说:

09-23 23:19:14.505: E/videowall-TranscodeService(23550): duration time is 0 ==> not Live but Static thumbnail
09-23 23:19:14.515: E/videowall-TranscodeService(23550): duration time is 11 ==> not Live but Static thumbnail
09-23 23:19:16.450: E/WifiHW(2327): ##################### set firmware type 0 #####################
09-23 23:19:18.020: E/LockPatternKeyguardView(2327): mIsVoiceUnlockOn=false
09-23 23:19:18.465: E/OMXCodec(1941): [OMX.google.vorbis.decoder] err = -1011
09-23 23:19:18.550: E/CircleShortcutWidget(2327): density = 320
09-23 23:19:18.550: E/CircleShortcutWidget(2327): pkg name =com.android.contacts, activityName=com.android.contacts.activities.DialtactsActivity
09-23 23:19:18.580: E/CircleShortcutWidget(2327): pkg name =com.google.android.googlequicksearchbox, activityName=com.google.android.googlequicksearchbox.SearchActivity
09-23 23:19:18.615: E/CircleShortcutWidget(2327): pkg name =com.android.browser, activityName=com.android.browser.BrowserActivity
09-23 23:19:18.630: E/OMXCodec(1941): [OMX.google.vorbis.decoder] err = -1011
09-23 23:19:18.645: E/CircleShortcutWidget(2327): pkg name =com.sec.android.app.camera, activityName=com.sec.android.app.camera.Camera
09-23 23:19:18.655: E/CircleShortcutWidget(2327): pkg name =com.android.mms, activityName=com.android.mms.ui.ConversationComposer
09-23 23:19:18.965: E/KeyguardViewMediator(2327): 2. Lockscreen lock
09-23 23:19:18.965: E/KeyguardViewMediator(2327): Phone is boot completed. so can broadcast
09-23 23:19:19.290: E/LockPatternKeyguardView(2327): !!! callback setLockScreenReady
09-23 23:19:19.290: E/CircleUnlockRippleRenderer(2327): CircleUnlockRippleRenderer setLockScreenReady
09-23 23:19:27.150: E/Watchdog(2327): !@Sync 950
09-23 23:19:43.130: E/MtpService(22037): In MTPAPP onReceive:android.intent.action.BATTERY_CHANGED
09-23 23:19:43.130: E/MtpService(22037): battPlugged Type : 2
09-23 23:19:43.230: E/Sensors(2327): Light old sensor_state 0, new sensor_state : 64 en : 1
09-23 23:19:43.400: E/Sensors(2327): Light old sensor_state 64, new sensor_state : 0 en : 0
09-23 23:19:53.085: E/Sensors(2327): Light old sensor_state 0, new sensor_state : 64 en : 1
09-23 23:19:53.090: E/Sensors(2327): Acc old sensor_state 64, new sensor_state : 65 en : 1
09-23 23:19:53.270: E/lights(2327): write_int failed to open /sys/class/leds/keyboard-backlight/brightness
09-23 23:19:53.530: E/SecTVOutService(1938): virtual void android::SecTVOutService::setHdmiStatus(uint32_t)::mSecHdmi.connect() fail
09-23 23:19:53.665: E/WifiHW(2327): ##################### set firmware type 0 #####################
09-23 23:19:53.690: E/ClockAlarmWidget(17819): [AlarmWidgetIdManager] getListItem() : itemIndex=0, widgetID:1
09-23 23:19:53.690: E/ClockAlarmWidget(17819): [AlarmWidgetIdManager] getListItem() : ItemIndex exceed ListItemCount. itemIndex=1
09-23 23:19:53.690: E/ClockAlarmWidget(17819): [AlarmWidgetIdManager] getListItem() : itemIndex=1, widgetID:1
09-23 23:19:53.715: E/videowall-TranscodeReceiver(23550): broadcastMSG : android.intent.action.SCREEN_ON
09-23 23:19:53.985: E/Launcher(3098): Error finding setting, default accessibility to not found: accessibility_enabled
09-23 23:19:54.000: E/KeyguardViewMediator(2327): 3. Lockscreen unlock
09-23 23:19:54.000: E/KeyguardViewMediator(2327): Phone is boot completed. so can broadcast
09-23 23:19:54.000: E/KeyguardViewMediator(2327): Phone is boot completed. so can broadcast
09-23 23:19:54.010: E/MotionRecognitionService(2327):   mReceiver.onReceive : ACTION_USER_PRESENT  :: UNLOCK SCREEN
09-23 23:19:54.100: E/SpannableStringBuilder(3098): SPAN_EXCLUSIVE_EXCLUSIVE spans cannot have a zero length
09-23 23:19:54.100: E/SpannableStringBuilder(3098): SPAN_EXCLUSIVE_EXCLUSIVE spans cannot have a zero length
09-23 23:19:54.105: E/MTPRx(22037): In MtpReceiverandroid.intent.action.USER_PRESENT
09-23 23:19:54.105: E/MTPRx(22037): check value of boot_completed is1
09-23 23:19:54.105: E/MTPRx(22037): check booting is completed_sys.boot_completed
09-23 23:19:54.120: E/MTPRx(22037): Sd-Card path/storage/extSdCard
09-23 23:19:54.135: E/MTPRx(22037): Status for mount/Unmount :mounted
09-23 23:19:54.135: E/MTPRx(22037): SDcard is  available
09-23 23:19:54.135: E/MTPRx(22037): The value of first_boot is  1
09-23 23:19:54.135: E/MTPRx(22037): [ 662] The value of first_boot is  1NORMAL SEQUENCE 
09-23 23:19:57.155: E/Watchdog(2327): !@Sync 951
09-23 23:20:00.115: E/ClockAlarmWidget(17819): [AlarmWidgetIdManager] getListItem() : itemIndex=0, widgetID:1
09-23 23:20:00.115: E/ClockAlarmWidget(17819): [AlarmWidgetIdManager] getListItem() : ItemIndex exceed ListItemCount. itemIndex=1
09-23 23:20:00.115: E/ClockAlarmWidget(17819): [AlarmWidgetIdManager] getListItem() : itemIndex=1, widgetID:1
09-23 23:20:04.340: E/SpannableStringBuilder(23766): SPAN_EXCLUSIVE_EXCLUSIVE spans cannot have a zero length
09-23 23:20:04.340: E/SpannableStringBuilder(23766): SPAN_EXCLUSIVE_EXCLUSIVE spans cannot have a zero length
09-23 23:20:05.035: E/AndroidRuntime(23766): FATAL EXCEPTION: main
09-23 23:20:05.035: E/AndroidRuntime(23766): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.oxtro.igniz/com.oxtro.igniz.NotificationList}: java.lang.NullPointerException
09-23 23:20:05.035: E/AndroidRuntime(23766):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2100)
09-23 23:20:05.035: E/AndroidRuntime(23766):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2125)
09-23 23:20:05.035: E/AndroidRuntime(23766):    at android.app.ActivityThread.access$600(ActivityThread.java:140)
09-23 23:20:05.035: E/AndroidRuntime(23766):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1227)
09-23 23:20:05.035: E/AndroidRuntime(23766):    at android.os.Handler.dispatchMessage(Handler.java:99)
09-23 23:20:05.035: E/AndroidRuntime(23766):    at android.os.Looper.loop(Looper.java:137)
09-23 23:20:05.035: E/AndroidRuntime(23766):    at android.app.ActivityThread.main(ActivityThread.java:4898)
09-23 23:20:05.035: E/AndroidRuntime(23766):    at java.lang.reflect.Method.invokeNative(Native Method)
09-23 23:20:05.035: E/AndroidRuntime(23766):    at java.lang.reflect.Method.invoke(Method.java:511)
09-23 23:20:05.035: E/AndroidRuntime(23766):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1008)
09-23 23:20:05.035: E/AndroidRuntime(23766):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:775)
09-23 23:20:05.035: E/AndroidRuntime(23766):    at dalvik.system.NativeStart.main(Native Method)
09-23 23:20:05.035: E/AndroidRuntime(23766): Caused by: java.lang.NullPointerException
09-23 23:20:05.035: E/AndroidRuntime(23766):    at com.oxtro.igniz.NotificationList.onCreate(NotificationList.java:48)
09-23 23:20:05.035: E/AndroidRuntime(23766):    at android.app.Activity.performCreate(Activity.java:5206)
09-23 23:20:05.035: E/AndroidRuntime(23766):    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1094)
09-23 23:20:05.035: E/AndroidRuntime(23766):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2064)
09-23 23:20:05.035: E/AndroidRuntime(23766):    ... 11 more
09-23 23:20:05.040: E/android.os.Debug(2327): !@Dumpstate > dumpstate -k -t -z -d -o /data/log/dumpstate_app_error
09-23 23:20:13.965: E/WifiHW(2327): ##################### set firmware type 0 #####################
09-23 23:20:13.970: E/MtpService(22037): In MTPAPP onReceive:android.intent.action.BATTERY_CHANGED
09-23 23:20:13.975: E/MtpService(22037): battPlugged Type : 2
09-23 23:20:14.905: E/InputDispatcher(2327): channel ~ Channel is unrecoverably broken and will be disposed!
09-23 23:20:14.985: E/Launcher(3098): Error finding setting, default accessibility to not found: accessibility_enabled
09-23 23:20:15.910: E/SpannableStringBuilder(3098): SPAN_EXCLUSIVE_EXCLUSIVE spans cannot have a zero length
09-23 23:20:15.910: E/SpannableStringBuilder(3098): SPAN_EXCLUSIVE_EXCLUSIVE spans cannot have a zero length
09-23 23:20:16.335: E/WifiHW(2327): ##################### set firmware type 0 #####################
09-23 23:20:27.160: E/Watchdog(2327): !@Sync 952
09-23 23:20:30.750: A/PowerManager(21999): WakeLock finalized while still held: TapContextSDK
09-23 23:20:30.750: A/PowerManager(21999): WakeLock finalized while still held: TapContextSDK
09-23 23:20:30.755: A/PowerManager(21999): WakeLock finalized while still held: TapContextSDK
09-23 23:20:30.760: A/PowerManager(21999): WakeLock finalized while still held: TapContextSDK
09-23 23:20:30.760: A/PowerManager(21999): WakeLock finalized while still held: TapContextSDK
09-23 23:20:30.765: A/PowerManager(21999): WakeLock finalized while still held: TapContextSDK
09-23 23:20:31.075: E/com.salyangoz.rgbtohexconverter$TapContextSDK(21999): Failed to register. Status Code: 400
09-23 23:20:32.610: E/SensorManager(3242): thread start
09-23 23:20:33.050: E/SpannableStringBuilder(24621): SPAN_EXCLUSIVE_EXCLUSIVE spans cannot have a zero length
09-23 23:20:33.050: E/SpannableStringBuilder(24621): SPAN_EXCLUSIVE_EXCLUSIVE spans cannot have a zero length
09-23 23:20:33.630: E/AndroidRuntime(24621): FATAL EXCEPTION: main
09-23 23:20:33.630: E/AndroidRuntime(24621): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.oxtro.igniz/com.oxtro.igniz.NotificationList}: java.lang.NullPointerException
09-23 23:20:33.630: E/AndroidRuntime(24621):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2100)
09-23 23:20:33.630: E/AndroidRuntime(24621):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2125)
09-23 23:20:33.630: E/AndroidRuntime(24621):    at android.app.ActivityThread.access$600(ActivityThread.java:140)
09-23 23:20:33.630: E/AndroidRuntime(24621):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1227)
09-23 23:20:33.630: E/AndroidRuntime(24621):    at android.os.Handler.dispatchMessage(Handler.java:99)
09-23 23:20:33.630: E/AndroidRuntime(24621):    at android.os.Looper.loop(Looper.java:137)
09-23 23:20:33.630: E/AndroidRuntime(24621):    at android.app.ActivityThread.main(ActivityThread.java:4898)
09-23 23:20:33.630: E/AndroidRuntime(24621):    at java.lang.reflect.Method.invokeNative(Native Method)
09-23 23:20:33.630: E/AndroidRuntime(24621):    at java.lang.reflect.Method.invoke(Method.java:511)
09-23 23:20:33.630: E/AndroidRuntime(24621):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1008)
09-23 23:20:33.630: E/AndroidRuntime(24621):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:775)
09-23 23:20:33.630: E/AndroidRuntime(24621):    at dalvik.system.NativeStart.main(Native Method)
09-23 23:20:33.630: E/AndroidRuntime(24621): Caused by: java.lang.NullPointerException
09-23 23:20:33.630: E/AndroidRuntime(24621):    at com.oxtro.igniz.NotificationList.onCreate(NotificationList.java:48)
09-23 23:20:33.630: E/AndroidRuntime(24621):    at android.app.Activity.performCreate(Activity.java:5206)
09-23 23:20:33.630: E/AndroidRuntime(24621):    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1094)
09-23 23:20:33.630: E/AndroidRuntime(24621):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2064)
09-23 23:20:33.630: E/AndroidRuntime(24621):    ... 11 more
09-23 23:20:33.635: E/android.os.Debug(2327): !@Dumpstate > dumpstate -k -t -z -d -o /data/log/dumpstate_app_error
09-23 23:20:43.975: E/MtpService(22037): In MTPAPP onReceive:android.intent.action.BATTERY_CHANGED
09-23 23:20:43.975: E/MtpService(22037): battPlugged Type : 2
09-23 23:20:44.180: E/Launcher(3098): Error finding setting, default accessibility to not found: accessibility_enabled
09-23 23:20:54.900: E/SpannableStringBuilder(3098): SPAN_EXCLUSIVE_EXCLUSIVE spans cannot have a zero length
09-23 23:20:54.900: E/SpannableStringBuilder(3098): SPAN_EXCLUSIVE_EXCLUSIVE spans cannot have a zero length
09-23 23:20:57.165: E/Watchdog(2327): !@Sync 953
09-23 23:21:00.055: E/ClockAlarmWidget(17819): [AlarmWidgetIdManager] getListItem() : itemIndex=0, widgetID:1
09-23 23:21:00.055: E/ClockAlarmWidget(17819): [AlarmWidgetIdManager] getListItem() : ItemIndex exceed ListItemCount. itemIndex=1
09-23 23:21:00.055: E/ClockAlarmWidget(17819): [AlarmWidgetIdManager] getListItem() : itemIndex=1, widgetID:1
09-23 23:21:04.515: E/SpannableStringBuilder(25582): SPAN_EXCLUSIVE_EXCLUSIVE spans cannot have a zero length
09-23 23:21:04.515: E/SpannableStringBuilder(25582): SPAN_EXCLUSIVE_EXCLUSIVE spans cannot have a zero length
09-23 23:21:05.185: E/AndroidRuntime(25582): FATAL EXCEPTION: main
09-23 23:21:05.185: E/AndroidRuntime(25582): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.oxtro.igniz/com.oxtro.igniz.NotificationList}: java.lang.NullPointerException
09-23 23:21:05.185: E/AndroidRuntime(25582):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2100)
09-23 23:21:05.185: E/AndroidRuntime(25582):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2125)
09-23 23:21:05.185: E/AndroidRuntime(25582):    at android.app.ActivityThread.access$600(ActivityThread.java:140)
09-23 23:21:05.185: E/AndroidRuntime(25582):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1227)
09-23 23:21:05.185: E/AndroidRuntime(25582):    at android.os.Handler.dispatchMessage(Handler.java:99)
09-23 23:21:05.185: E/AndroidRuntime(25582):    at android.os.Looper.loop(Looper.java:137)
09-23 23:21:05.185: E/AndroidRuntime(25582):    at android.app.ActivityThread.main(ActivityThread.java:4898)
09-23 23:21:05.185: E/AndroidRuntime(25582):    at java.lang.reflect.Method.invokeNative(Native Method)
09-23 23:21:05.185: E/AndroidRuntime(25582):    at java.lang.reflect.Method.invoke(Method.java:511)
09-23 23:21:05.185: E/AndroidRuntime(25582):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1008)
09-23 23:21:05.185: E/AndroidRuntime(25582):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:775)
09-23 23:21:05.185: E/AndroidRuntime(25582):    at dalvik.system.NativeStart.main(Native Method)
09-23 23:21:05.185: E/AndroidRuntime(25582): Caused by: java.lang.NullPointerException
09-23 23:21:05.185: E/AndroidRuntime(25582):    at com.oxtro.igniz.NotificationList.onCreate(NotificationList.java:48)
09-23 23:21:05.185: E/AndroidRuntime(25582):    at android.app.Activity.performCreate(Activity.java:5206)
09-23 23:21:05.185: E/AndroidRuntime(25582):    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1094)
09-23 23:21:05.185: E/AndroidRuntime(25582):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2064)
09-23 23:21:05.185: E/AndroidRuntime(25582):    ... 11 more
09-23 23:21:05.195: E/android.os.Debug(2327): !@Dumpstate > dumpstate -k -t -z -d -o /data/log/dumpstate_app_error
09-23 23:21:13.980: E/WifiHW(2327): ##################### set firmware type 0 #####################
09-23 23:21:16.345: E/WifiHW(2327): ##################### set firmware type 0 #####################
09-23 23:21:20.060: E/MtpService(22037): In MTPAPP onReceive:android.intent.action.BATTERY_CHANGED
09-23 23:21:20.060: E/MtpService(22037): battPlugged Type : 2

Answer 1

如果我没记错的话，那么你还没有初始化你的字符串数组

请将您的字符串[]初始化为

int n=Integer.parseInt(count);
listname=new String[n];
listplace=new String[n];

所有数组依此类推

for (int  i=0;i<=n;++i)
{
....