【发布时间】：2017-12-01 07:48:45
【问题描述】：
我已经创建了这段代码来在我的活动中调用 ListView 并且它可以工作，这是代码
public class PegawaiActivity extends AppCompatActivity {
private TextView mTextMessage;
String namapegawai;
List<String> IdList = new ArrayList<>();
ListView StudentListView;
ProgressBar progressBar;
String HttpUrl = "http://192.168.43.241/Android/MyKoperasi/SemuaMember.php";
private BottomNavigationView.OnNavigationItemSelectedListener mOnNavigationItemSelectedListener
= new BottomNavigationView.OnNavigationItemSelectedListener() {
@Override
public boolean onNavigationItemSelected(@NonNull MenuItem item) {
Fragment selectedFragment = null;
switch (item.getItemId()) {
case R.id.navigation_home:
//mTextMessage.setText(namapegawai);
selectedFragment = PegawaiFragment.newInstance();
break;
case R.id.navigation_dashboard:
//mTextMessage.setText(R.string.title_dashboard);
selectedFragment = MemberFragment.newInstance();
break;
//case R.id.navigation_notifications:
// mTextMessage.setText(R.string.title_notifications);
//break;
}
FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
transaction.replace(R.id.frame_layout, selectedFragment);
transaction.commit();
return true;
}
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_pegawai);
StudentListView = findViewById(R.id.listview1);
progressBar = findViewById(R.id.progressBar);
new GetHttpResponse(PegawaiActivity.this).execute();
BottomNavigationView navigation = findViewById(R.id.navigation);
navigation.setOnNavigationItemSelectedListener(mOnNavigationItemSelectedListener);
//Manually displaying the first fragment - one time only
FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
transaction.replace(R.id.frame_layout, PegawaiFragment.newInstance());
transaction.commit();
}
// JSON parse class started from here.
public class GetHttpResponse extends AsyncTask<Void, Void, Void>
{
public Context context;
String JSonResult;
List<Member> studentList;
public GetHttpResponse(Context context)
{
this.context = context;
}
@Override
protected void onPreExecute()
{
super.onPreExecute();
}
@Override
protected Void doInBackground(Void... arg0)
{
// Passing HTTP URL to HttpServicesClass Class.
HttpServicesClass httpServicesClass = new HttpServicesClass(HttpUrl);
try
{
httpServicesClass.ExecutePostRequest();
if(httpServicesClass.getResponseCode() == 200)
{
JSonResult = httpServicesClass.getResponse();
if(JSonResult != null)
{
JSONArray jsonArray = null;
try {
jsonArray = new JSONArray(JSonResult);
JSONObject jsonObject;
Member member;
studentList = new ArrayList<Member>();
for(int i=0; i<jsonArray.length(); i++)
{
member = new Member();
jsonObject = jsonArray.getJSONObject(i);
// Adding Student Id TO IdList Array.
IdList.add(jsonObject.getString("id").toString());
//Adding Student Name.
member.nama = jsonObject.getString("nama").toString();
member.nrp = jsonObject.getString("nrp").toString();
studentList.add(member);
}
}
catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
else
{
Toast.makeText(context, httpServicesClass.getErrorMessage(), Toast.LENGTH_SHORT).show();
}
}
catch (Exception e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(Void result)
{
progressBar.setVisibility(View.GONE);
StudentListView.setVisibility(View.VISIBLE);
if(studentList != null) {
ListAdapterClass adapter = new ListAdapterClass(studentList, context);
StudentListView.setAdapter(adapter);
}else
{
Toast.makeText(context, "Tidak ada data ditampilkan", Toast.LENGTH_SHORT).show();
}
}
}
}
是的，它显示了 ListView 项目，但它显示在我的活动布局中，而不是片段布局中
如何在不同的底部导航中显示
@Override
public boolean onNavigationItemSelected(@NonNull MenuItem item) {
Fragment selectedFragment = null;
switch (item.getItemId()) {
case R.id.navigation_home:
//mTextMessage.setText(namapegawai);
selectedFragment = PegawaiFragment.newInstance();
break;
case R.id.navigation_dashboard:
//mTextMessage.setText(R.string.title_dashboard);
selectedFragment = MemberFragment.newInstance();
break;
//case R.id.navigation_notifications:
// mTextMessage.setText(R.string.title_notifications);
//break;
}
FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
transaction.replace(R.id.frame_layout, selectedFragment);
transaction.commit();
return true;
}
};
我用来调用 ListView 以在底部导航的不同片段中显示的代码 谢谢
=======================更新 我的会员片段
public class MemberFragment extends Fragment {
public static MemberFragment newInstance() {
MemberFragment fragment = new MemberFragment();
return fragment;
}
TextView textViewNamaHolder;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.fragment_member, container, false);
getActivity().setTitle("Daftar Member");
setHasOptionsMenu(true);
//List<Member> studentList = ((PegawaiActivity) getActivity());
//PegawaiActivity a = new PegawaiActivity();
//PegawaiActivity.GetHttpResponse mm = a.new GetHttpResponse(getActivity());
//mm.execute();
//Adding ListView Item click Listener.
return v;
}
}
还有我的 PegawaiFragment
public class PegawaiFragment extends Fragment {
public static PegawaiFragment newInstance() {
PegawaiFragment fragment = new PegawaiFragment();
return fragment;
}
TextView textViewNamaHolder;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.fragment_pegawai, container, false);
getActivity().setTitle("Daftar Member");
setHasOptionsMenu(true);
//List<Member> studentList = ((PegawaiActivity) getActivity());
//PegawaiActivity a = new PegawaiActivity();
//PegawaiActivity.GetHttpResponse mm = a.new GetHttpResponse(getActivity());
//mm.execute();
//Adding ListView Item click Listener.
return v;
}
【问题讨论】：
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标签： android listview android-fragments fragment