【发布时间】：2014-10-07 20:14:38
【问题描述】：
我已经完成了一个简单的应用程序，通过 json 列出 mysql 数据库中的所有产品。当我单击特定产品时，它会将我带到显示其详细信息的活动。 现在我更改了我的应用程序，以便当我从列表中单击特定产品时，它会转到 3 个选项卡式片段。我已经创建了所有相关的片段，一切正常。仅当我尝试将列表中的所有产品活动中的数据传递给详细信息片段活动时，它才不起作用。如何将列出所有产品的主屏幕中的数据传递到显示详细信息的 3 个片段？
进一步解释：
没有框架的工作示例： 主要活动显示所有产品并在选择单个产品时将其传递给详细信息活动-> 详细信息活动从主要活动中获取数据并显示详细信息
现在我有了显示所有产品的主要活动。我是否将数据传递给 ->“public class EmpresaDetailsActivity extends FragmentActivity implements ActionBar.TabListener { etc”，还是必须将其传递给我创建的所有其他 3 个单个片段？
（旧方式）列出所有产品：
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.all_empresas);
empresaList = new ArrayList<HashMap<String, String>>();
// Get listview
ListView lv = getListView();
// on selecting single empresa
// launching Empresa Details Screen
lv.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// getting values from selected ListItem
String eid = ((TextView) view.findViewById(R.id.eid)).getText().toString();
String marca = ((TextView) view.findViewById(R.id.marca)).getText().toString();
String investimento = ((TextView) view.findViewById(R.id.investimento)).getText().toString();
String marcatotal = ((TextView) view.findViewById(R.id.marcatotal)).getText().toString();
// Starting new intent
Intent in = new Intent(getApplicationContext(),EmpresaDetailsActivity.class);
// sending data to next activity
in.putExtra(TAG_EID, eid);
in.putExtra(TAG_MARCA, marca);
in.putExtra(TAG_INVESTIMENTO, investimento);
in.putExtra(TAG_MARCATOTAL, marcatotal);
// starting new activity and expecting some response back
startActivity(in);
}
});
// Loading empresa in Background Thread
new LoadAllEmpresa().execute();
}
（老办法）单品详情：
public class EmpresaDetailsActivity extends Activity {
// JSON node keys
private static final String TAG_EID = "eid";
private static final String TAG_MARCA = "marca";
private static final String TAG_INVESTIMENTO = "investimento";
private static final String TAG_MARCATOTAL = "marcatotal";
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.details_empresa);
// getting intent data
Intent in = getIntent();
// Get JSON values from previous intent
String eid = in.getStringExtra(TAG_EID);
String marca = in.getStringExtra(TAG_MARCA);
String investimento = in.getStringExtra(TAG_INVESTIMENTO);
String marcatotal = in.getStringExtra(TAG_MARCATOTAL);
// Displaying all values on the screen
TextView lblEid = (TextView) findViewById(R.id.showEid);
TextView lblName = (TextView) findViewById(R.id.showMarca);
TextView lblInvestimento = (TextView) findViewById(R.id.showInvestimento);
TextView lblMarcatotal = (TextView) findViewById(R.id.showMarcaTotal);
lblEid.setText(eid);
lblName.setText(marca);
lblInvestimento.setText(investimento);
lblMarcatotal.setText(marcatotal);
}
}
具有 3 个片段的新详细信息类：
public class EmpresaDetailsActivity extends FragmentActivity implements ActionBar.TabListener {
private ViewPager viewPager;
private TabsPagerAdapter mAdapter;
private ActionBar actionBar;
// Tab titles
private String[] tabs = { "Apresentação", "Ficha Técnica", "Pedir Informação" };
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.details_global_frag);
// Initilization
viewPager = (ViewPager) findViewById(R.id.pager);
actionBar = getActionBar();
mAdapter = new TabsPagerAdapter(getSupportFragmentManager());
viewPager.setAdapter(mAdapter);
actionBar.setHomeButtonEnabled(false);
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
// Adding Tabs
for (String tab_name : tabs) {
actionBar.addTab(actionBar.newTab().setText(tab_name)
.setTabListener(this));
}
/**
* on swiping the viewpager make respective tab selected
* */
viewPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
@Override
public void onPageSelected(int position) {
// on changing the page
// make respected tab selected
actionBar.setSelectedNavigationItem(position);
}
@Override
public void onPageScrolled(int arg0, float arg1, int arg2) {
}
@Override
public void onPageScrollStateChanged(int arg0) {
}
});
}
@Override
public void onTabReselected(Tab tab, FragmentTransaction ft) {
}
@Override
public void onTabSelected(Tab tab, FragmentTransaction ft) {
// on tab selected
// show respected fragment view
viewPager.setCurrentItem(tab.getPosition());
}
@Override
public void onTabUnselected(Tab tab, FragmentTransaction ft) {
}
}
TabsPagerAdapter 类：
public class TabsPagerAdapter extends FragmentPagerAdapter {
public TabsPagerAdapter(FragmentManager fm) {
super(fm);
}
@Override
public Fragment getItem(int index) {
switch (index) {
case 0:
// Top Rated fragment activity
return new ApresentacaoFragment();
case 1:
// Games fragment activity
return new FichaTecnicaFragment();
case 2:
// Movies fragment activity
return new PedirInformacaoFragment();
}
return null;
}
@Override
public int getCount() {
// get item count - equal to number of tabs
return 3;
}
}
3 个片段中的 1 个片段的示例：
public class ApresentacaoFragment extends Fragment {
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_apresentacao, container, false);
return rootView;
}
}
【问题讨论】：