加载地图失败。无法连接Google服务器。这可能是一个身份验证问题。

我每天都在搜索，但是我找不到答案...

所有的东西都准备好了，但是谷歌地图仍然无法在带有选项卡的片段上显示。

我检查过了，已经打开了Google Map Android V2和正确的API_KEY。

我不知道发生了什么事情！

MainActivity.java:

public class MainActivity extends FragmentActivity implements
        ActionBar.TabListener {

    SectionsPagerAdapter mSectionsPagerAdapter;

    ViewPager mViewPager;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        String titles[] = { this.getString(R.string.title_around),
                this.getString(R.string.title_map),
                this.getString(R.string.title_favorite),
                this.getString(R.string.title_achievement), };

        final ActionBar actionBar = getActionBar();
        actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);

        mSectionsPagerAdapter = new SectionsPagerAdapter(
                getSupportFragmentManager());

        mViewPager = (ViewPager) findViewById(R.id.pager);
        mViewPager.setAdapter(mSectionsPagerAdapter);
        mViewPager
                .setOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() {
                    @Override
                    public void onPageSelected(int position) {
                        actionBar.setSelectedNavigationItem(position);
                    }
                });

        for (int i = 0; i < titles.length; i++) {
            actionBar.addTab(actionBar.newTab().setText(titles[i])
                    .setTabListener(this));
        }
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    @Override
    public void onTabSelected(Tab tab, FragmentTransaction fragmentTransaction) {
        mViewPager.setCurrentItem(tab.getPosition());
    }

    @Override
    public void onTabUnselected(ActionBar.Tab tab,
            FragmentTransaction fragmentTransaction) {
    }

    @Override
    public void onTabReselected(ActionBar.Tab tab,
            FragmentTransaction fragmentTransaction) {
    }

    public class SectionsPagerAdapter extends FragmentPagerAdapter {

        public SectionsPagerAdapter(FragmentManager fm) {
            super(fm);
        }

        @Override
        public Fragment getItem(int position) {
            // TODO 在這邊決定哪個位置要給什麼 View（Fragment）
            Fragment fragment = null;
            // TODO 建議先在之前就初始化好 4 個 Fragment
            switch (position) {
            case 0:
                fragment = new AroundFragment();
                break;
            case 1:
                fragment = new MapsFragment();
                break;
            case 2:
                fragment = new FavoriteFragment();
                break;
            case 3:
                fragment = new AchievementFragment();
                break;
            default:
                break;
            }

            return fragment;
        }

        @Override
        public int getCount() {
            return 4;
        }

        @Override
        public CharSequence getPageTitle(int position) {
            // TODO 在這邊決定每一個 View 的 title
            switch (position) {
            case 0:
                return getString(R.string.title_around);
            case 1:
                return getString(R.string.title_map);
            case 2:
                return getString(R.string.title_favorite);
            case 3:
                return getString(R.string.title_achievement);
            }
            return null;
        }
    }

}

MapsFragment.java：

public class MapsFragment extends Fragment{
    static final LatLng NKUT = new LatLng(23.979548, 120.696745);
    private GoogleMap map;
    SupportMapFragment mMapFragment;
    public MapsFragment() {

    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        View rootView = inflater.inflate(R.layout.map_fragment,container, false);

        map = ((SupportMapFragment)getFragmentManager().findFragmentById(R.id.map)).getMap();

         mMapFragment = SupportMapFragment.newInstance();
         FragmentTransaction fragmentTransaction =
                 getFragmentManager().beginTransaction();
         fragmentTransaction.add(R.id.map,mMapFragment);
         fragmentTransaction.commit();

        return rootView;

    }
}

地图片段.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity" >

    <fragment
        android:id="@+id/map"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        class="com.google.android.gms.maps.SupportMapFragment" />

</RelativeLayout> 

清单文件 Manifest.xml：

<!-- Google Map -->
<permission
        android:name="com.jertt.yummymap.permission.MAPS_RECEIVE"
        android:protectionLevel="signature"/>
<uses-permission android:name="com.jertt.yummymap.permission.MAPS_RECEIVE"/>
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES"/>
<!-- The following two permissions are not required to use
     Google Maps Android API v2, but are recommended. -->
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>

<!-- end -->
    <!-- Google Map API Key -->

    <meta-data
        android:name="com.google.android.maps.v2.API_KEY"
        android:value="key" />

    <!-- end -->

解决方案：

我找到了解决方法！！！

如果你使用的是私有密钥库来申请API_KEY，那么你无法通过eclipse上传和安装应用程序。

你需要自己将.apk文件上传到设备上并进行安装！

感谢Tarsem和srikanth gr的帮助！！