استفاده از ActionBar در پروژه GoogleMap

با سلام

مشکل تا حدودی حل شده فقط روی ورژنهای پایین کار نمیکنه( موقع باز کردن منو برنامه فورس کلوز میشه)

سلام

دوستان کسی میدونه چرا این کد روی اندروید 2.2 کار نمیکنه ولی روی اندروید 4. کار میکنه

در واقع هدف استفاده از اکشن بار تو ورژنهای پایین اندروید بوده;

================ MainActivity
import java.util.ArrayList;
import android.os.Bundle;
import android.support.v7.app.ActionBar;
import android.support.v7.app.ActionBarActivity;
public class ActionBarApi8Activity extends ActionBarActivity implements ActionBar.OnNavigationListener
{
    // action bar
    private ActionBar                 actionBar;
    // Title navigation Spinner data
    private ArrayList<SpinnerNavItem> navSpinner;
    // Navigation adapter
    private TitleNavigationAdapter    adapter;
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        actionBar = getSupportActionBar();
        // Hide the action bar title
        actionBar.setDisplayShowTitleEnabled(false);
        // Enabling Spinner dropdown navigation
        actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_LIST);
        // Spinner title navigation data
        navSpinner = new ArrayList<SpinnerNavItem>();
        navSpinner.add(new SpinnerNavItem("Local", R.drawable.ic_launcher));
        navSpinner.add(new SpinnerNavItem("My Places", R.drawable.ic_launcher));
        navSpinner.add(new SpinnerNavItem("Checkins", R.drawable.ic_launcher));
        navSpinner.add(new SpinnerNavItem("Latitude", R.drawable.ic_launcher));
        // title drop down adapter
        adapter = new TitleNavigationAdapter(getApplicationContext(), navSpinner);
        // assigning the spinner navigation 

           actionBar.setListNavigationCallbacks(adapter, this);
     }
    @Override
    public boolean onNavigationItemSelected(int itemPosition, long itemId)
    {
        // TODO Auto-generated method stub
        return false;
    }
}

=============================== Class TitleNavigationAdapter

package com.r.h.app.acb;

import java.util.ArrayList;
import android.app.Activity;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;

public class TitleNavigationAdapter extends BaseAdapter {

    private ImageView                 imgIcon;
    private TextView                  txtTitle;
    private ArrayList<SpinnerNavItem> spinnerNavItem;
    private Context                   context;
    public TitleNavigationAdapter(Context context,
                                  ArrayList<SpinnerNavItem> spinnerNavItem) {
        this.spinnerNavItem = spinnerNavItem;
        this.context = context;
    }

    @Override
    public int getCount() {
        return spinnerNavItem.size();
    }
    @Override
    public Object getItem(int index) {
        return spinnerNavItem.get(index);
    }
    @Override
    public long getItemId(int position) {
        return position;
    }
    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        if (convertView == null) {
            LayoutInflater mInflater = (LayoutInflater)
                    context.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
            convertView = mInflater.inflate(R.layout.list_item_title_navigation, null);
        }
        imgIcon = (ImageView) convertView.findViewById(R.id.imgIcon);
        txtTitle = (TextView) convertView.findViewById(R.id.txtTitle);

        imgIcon.setImageResource(spinnerNavItem.get(position).getIcon());
        imgIcon.setVisibility(View.GONE);
        txtTitle.setText(spinnerNavItem.get(position).getTitle());
        return convertView;
    }
    @Override
    public View getDropDownView(int position, View convertView, ViewGroup parent) {
        if (convertView == null) {
            LayoutInflater mInflater = (LayoutInflater)
                    context.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
            convertView = mInflater.inflate(R.layout.list_item_title_navigation, null);
        }
        imgIcon = (ImageView) convertView.findViewById(R.id.imgIcon);
        txtTitle = (TextView) convertView.findViewById(R.id.txtTitle);
        imgIcon.setImageResource(spinnerNavItem.get(position).getIcon());
        txtTitle.setText(spinnerNavItem.get(position).getTitle());
        return convertView;
    }

}

=========================Class SpinnerNavItem

public class SpinnerNavItem {

    private String title;
    private int    icon;
    public SpinnerNavItem(String title, int icon) {
        this.title = title;
        this.icon = icon;
    }
    public String getTitle() {
        return this.title;
    }
    public int getIcon() {
        return this.icon;
    }
}

===== list_item_title_navigation.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="fill_parent"
    android:padding="5dp" >
    
    <ImageView android:id="@+id/imgIcon"
        android:layout_width="25dp"
        android:layout_height="25dp"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:src="@drawable/ic_launcher"
        android:layout_marginRight="5dp"
        />
         <TextView android:id="@+id/txtTitle"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerVertical="true"
        android:layout_toRightOf="@id/imgIcon"/>
 </RelativeLayout>

==== ===================== AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.r.h.app.acb"
    android:versionCode="1"
    android:versionName="1.0" >
    <uses-sdk android:minSdkVersion="8"
        android:maxSdkVersion="15"/>
    <application
         android:name=".RGlobal"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/MyThem">
        <activity
            android:name=".ActionBarApi8Activity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>
</manifest>

============================== project.properties

# This file is automatically generated by Android Tools.
# Do not modify this file -- YOUR CHANGES WILL BE ERASED!
#
# This file must be checked in Version Control Systems.
#
# To customize properties used by the Ant build system edit
# "ant.properties", and override values to adapt the script to your
# project structure.
#
# To enable ProGuard to shrink and obfuscate your code, uncomment this (available properties: sdk.dir, user.home):
#proguard.config=${sdk.dir}\tools\proguard\proguard-android.txt:proguard-project.txt

# Project target.
target=android-15
android.library.reference.1=../android-support-v7-appcompat
================================= ٍError

FATAL EXCEPTION: main
java.lang.NullPointerException
at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:458)
at android.view.View.measure(View.java:8171)
at android.support.v7.internal.widget.ListPopupWindow$DropDownListView.measureHeightOfChildrenCompat(ListPopupWindow.java:1323)
at android.support.v7.internal.widget.ListPopupWindow.buildDropDown(ListPopupWindow.java:1062)
at android.support.v7.internal.widget.ListPopupWindow.show(ListPopupWindow.java:514)
at android.support.v7.internal.widget.SpinnerICS$DropdownPopup.show(SpinnerICS.java:758)
at android.support.v7.internal.widget.SpinnerICS.performClick(SpinnerICS.java:443)
at android.view.View$PerformClick.run(View.java:8816)
at android.os.Handler.handleCallback(Handler.java:587)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:123)
at android.app.ActivityThread.main(ActivityThread.java:4627)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:521)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
at dalvik.system.NativeStart.main(Native Method)

دوستان نمیدونم چرا ولی من RelativeLayout رو به LinearLayout تبدیل کردم و درست شد