在选项卡更改后恢复标签视图中的数据

Question

我有一个Android应用程序，我需要在两个选项卡之间切换。我正在使用碎片。问题是，当我在一个选项卡上的editText框中键入某些内容并切换到另一个选项卡时，原始的一个会重置为默认值。

基于我在不同的论坛上找到了答案，我保存状态：

@Override 
public void onTabSelected(ActionBar.Tab tab, 
     FragmentTransaction fragmentTransaction) { 
    // When the given tab is selected, show the tab contents in the 
    // container view. 
    Fragment fragment = new TabsSectionFragment(); 
    //fragment.setRetainInstance(true); 
    Bundle args = new Bundle(); 
    args.putInt(TabsSectionFragment.ARG_SECTION_NUMBER, 
      tab.getPosition() + 1); 
    fragment.setArguments(args); 
    getSupportFragmentManager().beginTransaction() 
      .replace(R.id.container, fragment).commit(); 
} 

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

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

在onCreateView，我加载了几个布局：

public static class TabsSectionFragment extends Fragment { 
    public static final String ARG_SECTION_NUMBER = "section_number"; 

    public TabsSectionFragment() { 
    } 

    @Override 
    public View onCreateView(LayoutInflater inflater, ViewGroup container, 
      Bundle savedInstanceState) { 
     int selectedSection = getArguments().getInt(ARG_SECTION_NUMBER); 
     switch (selectedSection) 
     { 
      case 1: 
       // load the input layout XML 
       LayoutInflater factory1 = LayoutInflater.from(getActivity()); 
       View myView1 = factory1.inflate(R.layout.tab1, null); 
       return myView1; 

      case 2: 
       // load the summary layout XML 
       LayoutInflater factory2 = LayoutInflater.from(getActivity()); 
       View myView2 = factory2.inflate(R.layout.tab2, null); 
       return myView2; 

      default: 
       // Create a new TextView and set its text to the fragment's section 
       // number argument value. 
       TextView textView = new TextView(getActivity()); 
       textView.setGravity(Gravity.CENTER); 
       textView.setText(Integer.toString(getArguments().getInt(
         ARG_SECTION_NUMBER))); 

       return textView; 
     } 
    } 
} 

我应该如何使用savedInstanceState恢复标签状态，所以我不会丢失在切换标签前输入的信息。

我也读过一些人推荐隐藏和显示片段而不是保存/重新加载状态。什么是更好的选择。

在此先感谢！

Answer 1

我会改变你的方法，并使用tabhost

private TabHost tabhost; 
private View view1; 
private View view2; 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.mainLayout); 
    tabhost = (TabHost) findViewById(R.id.tabhostView); 
    tabhost.setup(); 
    tabhost.getTabWidget().setDividerDrawable(R.drawable.tab_divider); 
    view1 = getLayoutInflater().inflate(R.layout.view1, null); 
    view2 = getLayoutInflater().inflate(R.layout.view2, null); 
    setupTab(view1, "View1"); 
    setupTab(view2, "View2"); 
//set tab 
tabhost.setCurrentTab(getIntent().getExtras().getInt(CURRENT_TAB)); 
} 

然后创建2种方法来设置像每个视图：

private void buildView1(View view) { 
    <enter code here> 
    view.invalidate 
}