相关疑难解决方法(0)

我有问题使我的片段通过Activity使用FragmentPagerAdapter,作为帮助类来实现对标签的管理以及连接ViewPager关联的所有细节TabHost.我的实现FragmentPagerAdapter与Android示例项目Support4Demos提供的一样.

主要问题是FragmentManager当我没有Id或Tag时,如何从特定片段中获取特定片段？FragmentPagerAdapter正在创建片段并自动生成Id和标签.

我正在ViewPager使用3 Fragments并且我想要更改TextView第三页的文本.

在那个页面中我有一个Button按下时,转到SD图像选择一个.完成后,返回页面并希望TextView使用该图像的路径进行更新.问题是,当我尝试访问它时TextView,FragmentActivity它是null.

这是我的代码

SherlockFragmentActivity:

public class TabsFacturasActivity extends SherlockFragmentActivity {

    protected MyApplication myApplication;
    private static final int FILE_SELECT_CODE = 0;

    private MyAdapter mAdapter;
    private ViewPager mPager;
    private PageIndicator mIndicator;
    private TextView textViewImg;

    private int lecturas = 0;
    private SimpleDateFormat dateFormat = new SimpleDateFormat("dd/MM/yyyy"); 
    private boolean adjunto = false;
    private String filePath;
    private boolean esLecturaAT = false;

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

        // Get …

我想从FragmentActivity中更改片段中的ImageView(在代码中创建).(XML中没有片段和标记).

从FragmentActivity扩展的MainActivity和从GooglePlayServicesClient.ConnectionCallbacks实现的:

...
FragmentAdapter mAdapter;
ViewPager mPager;
...

public void onCreate(Bundle savedInstanceState){
    ...
    FragmentManager fm = getSupportFragmentManager();
    mAdapter = new FragmentAdapter(fm);
    mPager.setAdapter(mAdapter);
    ...}

@Override
public void onConnected(Bundle connectionHint){
//*** I want to change a ImageView on Fragment1 here
}

从FragmentPagerAdapter扩展的FragmentAdapter:

...
private FragmentManager mFragmentManager;

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

@Override
public Fragment getItem(int pos){
// String name = makeFragmentName(R.id.mainPager, pos);
// Fragment fragmentObject = mFragmentManager.findFragmentByTag(name);
Fragment fragmentObject = null;

switch(pos){
    case 0:
        fragmentObject = new Fragment1();
        break;
    ...
}

return …