Android onTabChanged无效，碎片重叠

我有一个FragmentTabHost，在片段切换上有一些问题。在尝试一个片段切换之后，我单击另一个选项卡，选项卡内容重叠。然后我尝试覆盖onTabChanged方法（不知道它是否是一个解决方案…），但是我发现onTabChanged没有运行

--更新--

onTabChanged现在可以运行，但重叠问题仍然存在

这是我的密码：

主要活动

public class MainActivity extends FragmentActivity implements OnTabChangeListener{
    private static final String TAB = "MainActivity";

    private FragmentTabHost tabMenu;
    public static final String NEWS_TAB = "news";
    public static final String SHARE_TAB = "share";
    public static final String CAMERA_TAB = "camera";
    public static final String STATUS_TAB = "status";
    public static final String OTHER_TAB = "other";


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        tabMenu = (FragmentTabHost)findViewById(R.id.main_tabhost);
        tabMenu.setup(this, getSupportFragmentManager(), android.R.id.tabcontent);

        String[] tabTitle = getResources().getStringArray(R.array.tab_title);
        for (int i=0; i<tabTitle.length; i++){

            String tagId = "";
            int tabIconDrawable = 0;
            Class tabClass = BlankTab.class;

            switch(tabTitle[i]){
            case "最新消息":
                tabIconDrawable = R.drawable.ic_action_view_as_list;            
                tagId = this.NEWS_TAB;
                tabClass = News.class;
                break;
            case "貨件分享":
                tabIconDrawable = R.drawable.ic_action_important;
                tagId = this.SHARE_TAB;
                tabClass = GoodsShare.class;
                break;
            case "":
                tabIconDrawable = R.drawable.ic_action_camera;
                tagId = this.CAMERA_TAB;
                break;
            case "物流狀態":
                tabIconDrawable = R.drawable.ic_action_airplane_mode_on;
                tagId = this.STATUS_TAB;
                tabClass = LogisticStatus.class;
                break;
            case "其他":
                tabIconDrawable = R.drawable.ic_action_overflow;
                tagId = this.OTHER_TAB;
                tabClass = Others.class;
                break;
            }

            View tabView = getLayoutInflater().inflate(R.layout.tab_layout, null, false);
            ImageView tabIcon = (ImageView)tabView.findViewById(R.id.tab_icon);
            TextView tabText = (TextView)tabView.findViewById(R.id.tab_title);

            tabIcon.setImageDrawable(getResources().getDrawable(tabIconDrawable));
            tabText.setText(tabTitle[i]);

            TabSpec spec = tabMenu.newTabSpec(tagId).setIndicator(tabView);

            tabMenu.addTab(spec, tabClass, null);
            tabMenu.getTabWidget().getChildAt(i).setBackground(getResources().getDrawable(R.drawable.main_tab_selector));
        }

        tabMenu.setOnTabChangedListener(this);

    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        //getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.

        return super.onOptionsItemSelected(item);
    }

    @Override
    public void onTabChanged(String tabId) {
        // TODO Auto-generated method stub
        Log.d(TAB, tabId);
        FragmentTransaction t = getSupportFragmentManager().beginTransaction();
        Fragment fragment = null;
        if (tabId.equals(this.NEWS_TAB)){
            fragment = new News();
        } else if (tabId.equals(this.SHARE_TAB)){
            fragment = new GoodsShare();
        } else if (tabId.equals(this.CAMERA_TAB)){
            fragment = new Camera();
        } else if (tabId.equals(this.STATUS_TAB)){
            fragment = new LogisticStatus();
        } else if (tabId.equals(this.OTHER_TAB)){
            fragment = new Others();
        }

        if (fragment != null){
            t.replace(android.R.id.tabcontent, fragment);
        } else {
            Log.e(TAB, "fragment creation error");
        }
    }


}

---

最后，我找到了它。onTabChanged中缺少提交（）

@Override
public void onTabChanged(String tabId) {
    // TODO Auto-generated method stub
    Log.d(TAB, tabId);
    FragmentTransaction t = getSupportFragmentManager().beginTransaction();
    Fragment fragment = null;
    if (tabId.equals(this.NEWS_TAB)){
        fragment = new News();
    } else if (tabId.equals(this.SHARE_TAB)){
        fragment = new GoodsShare();
    } else if (tabId.equals(this.CAMERA_TAB)){
        fragment = new Camera();
    } else if (tabId.equals(this.STATUS_TAB)){
        fragment = new LogisticStatus();
    } else if (tabId.equals(this.OTHER_TAB)){
        fragment = new Others();
    }

    if (fragment != null){
        t.replace(android.R.id.tabcontent, fragment).commit(); //missing commit() here
    } else {
        Log.e(TAB, "fragment creation error");
    }
}

public void fragmentSwitch(Fragment fragment){
    FragmentManager fragmentManager = slideMenuActivity.getSupportFragmentManager();
    fragmentManager.beginTransaction()
            //.setCustomAnimations(android.R.anim.slide_in_left, android.R.anim.slide_out_right)
            .replace(android.R.id.tabcontent, fragment)
            .commit();
    fragmentManager.executePendingTransactions();
}

@Override
public void onTabChanged(String tabId) {
    // TODO Auto-generated method stub
    Log.d(TAB, tabId);
    FragmentTransaction t = getSupportFragmentManager().beginTransaction();
    Fragment fragment = null;
    if (tabId.equals(this.NEWS_TAB)){
        fragment = new News();
    } else if (tabId.equals(this.SHARE_TAB)){
        fragment = new GoodsShare();
    } else if (tabId.equals(this.CAMERA_TAB)){
        fragment = new Camera();
    } else if (tabId.equals(this.STATUS_TAB)){
        fragment = new LogisticStatus();
    } else if (tabId.equals(this.OTHER_TAB)){
        fragment = new Others();
    }

    if (fragment != null){
        t.replace(android.R.id.tabcontent, fragment).commit(); //missing commit() here
    } else {
        Log.e(TAB, "fragment creation error");
    }
}