在Actionbar sherlock中，已调用add-tab-show:commit

Question

我正在尝试在android中使用ActionBarSherlock进行选项卡视图。这只是一个有3个选项卡的演示项目，每个选项卡只显示一个包含文本视图的片段。这是我的MainActivity代码：

public class MainActivity extends SherlockFragmentActivity {
private ActionBar mActionBar;
private Tab tab1;
private Tab tab2;
private Tab tab3;
@Override
protected void onCreate(Bundle arg0) {
    super.onCreate(arg0);
    setContentView(R.layout.activity_main);
    mActionBar = getSupportActionBar();
    mActionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
    tab1 = mActionBar.newTab().setText("TAB1");
    tab2 = mActionBar.newTab().setText("TAB2");
    tab3 = mActionBar.newTab().setText("TAB3");
    tab1.setTabListener(new TabSelectListener(FragmentTest
            .newInstance("Fragment1"), R.id.container));
    tab2.setTabListener(new TabSelectListener(FragmentTest
            .newInstance("Fragment2"), R.id.container));
    tab3.setTabListener(new TabSelectListener(FragmentTest
            .newInstance("Fragment3"), R.id.container));
    mActionBar.addTab(tab1);
    mActionBar.addTab(tab2);
    mActionBar.addTab(tab3);
}
private class TabSelectListener implements TabListener {
    private SherlockFragment mFragment;
    private int resId;
    public TabSelectListener(SherlockFragment fragment, int resId) {
        mFragment = fragment;
        this.resId = resId;
    }
    @Override
    public void onTabSelected(Tab tab, FragmentTransaction ft) {
    Log.e("Listener", "onTabSelected");
    ft.replace(resId, mFragment).commit();
    }
    @Override
    public void onTabUnselected(Tab tab, FragmentTransaction ft) {
        Log.e("Listener", "onTabUnselected");
        // ft.remove(mFragment).commit();
    }
    @Override
    public void onTabReselected(Tab tab, FragmentTransaction ft) {
        Log.e("Listener", "onTabReselected");
    }
}
}
//This is my FragmentTest
public class FragmentTest extends SherlockFragment {
private String name;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {
    View view = inflater.inflate(R.layout.fragment, container, false);
    TextView textView = (TextView) view.findViewById(R.id.tvText);
    textView.setText("" + name);
    return view;
}
public static SherlockFragment newInstance(String s) {
    return new FragmentTest().setName(s);
}
public String getName() {
    return name;
}
public FragmentTest setName(String name) {
    this.name = name;
    return this;
}
}

上面的代码将导致我的应用程序force close出现：commit already called错误。我搜索了很多教程，但没有任何线索。有人能为我解释并解决吗？非常感谢！

Answer 1

我知道这是一个老问题，但由于没有给出答案，所以它在这里。更改：

@Override
public void onTabSelected(Tab tab, FragmentTransaction ft) {
    Log.e("Listener", "onTabSelected");
    ft.replace(resId, mFragment).commit();
}

至

@Override
public void onTabSelected(Tab tab, FragmentTransaction ft) {
    Log.e("Listener", "onTabSelected");
    ft.replace(resId, mFragment);
}

FragmentTransaction将自动被committe，因此显式调用commit（）将抛出您遇到的错误。