如何在 android 中的片段中刷新表格布局
How can I refresh tablelayout within fragment in android
我是 Android 开发新手。我在这里删除了不必要的代码，但是对 Rest API 的调用没有问题。我这里有一个片段，其中有一个 table 布局。在异步任务中调用 Rest API，然后应该将检索到的数据插入 table 并刷新它。问题是 table 收到数据后不显示。有人可以指出正确的方向来解决这个问题吗？谢谢！
public class TransactionsFragment extends Fragment {
final String urlString = "https:/exampleurl.net/restapi/Handler.ashx";
String cnoKey = "com.example.app.saveCredentials.cno";
String aliasnameKey = "com.example.app.saveCredentials.aliasname";
SharedPreferences prefs;
LayoutInflater inflaterGlobal;
ViewGroup containerGlobal;
List<String> recids;
List<String> folders;
List<String> whotos;
List<String> directions;
List<String> documents;
List<String> thedates;
View rootView;
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_transactions, container, false);
inflaterGlobal = inflater;
containerGlobal = container;
TableLayout ll = (TableLayout) rootView.findViewById(R.id.tableLayout1);
prefs = getActivity().getPreferences(Context.MODE_PRIVATE);
String aliasname = prefs.getString(aliasnameKey, null);
new TestAsync(aliasname, "", getActivity()).execute();
return rootView;
}
class TestAsync extends AsyncTask<Void, Integer, String>
{
private String aliasname;
private String password;
private String value; //success value
private String recid; //success recid
private String folder;
private String whoto;
private String direction;
private String document;
private String thedate;
private ProgressDialog progressDialog;
private Activity activity;
public TestAsync(String aliasname, String password, Activity activity) {
super();
this.password = password;
this.aliasname = aliasname;
this.activity = activity;
}
protected void onPreExecute() {
System.out.println("PreExecute");
progressDialog = ProgressDialog.show(activity, "Loading", "Loading", true);
}
protected String doInBackground(Void... arg0) {
try {
JSONObject result = GetTranReport(aliasname, "False", "1", "03", "2015");
recids = new ArrayList<>();
folders = new ArrayList<>();
whotos = new ArrayList<>();
directions = new ArrayList<>();
documents = new ArrayList<>();
thedates = new ArrayList<>();
JSONObject jsonObject;
JSONArray jsonArray = result.getJSONArray("Value");
for (int i = 0; i < jsonArray.length()-1; i++) {
System.out.println("i = " + i);
jsonObject = jsonArray.getJSONObject(i);
System.out.println("recid = " + jsonObject.getString("recid"));
recids.add(jsonObject.getString("recid"));
folders.add(jsonObject.getString("folder"));
whotos.add(jsonObject.getString("whoto"));
directions.add(jsonObject.getString("direction"));
documents.add(jsonObject.getString("document"));
thedates.add(jsonObject.getString("thedate"));
}
} catch (Exception e) {
e.printStackTrace();
}
return "You are at PostExecute";
}
protected void onProgressUpdate(Integer... a) {
System.out.println("Progress Update" + a[0]);
}
protected void onPostExecute(String result) {
//handleLogin(value);
System.out.println("" + result);
View rootView = inflaterGlobal.inflate(R.layout.fragment_transactions, containerGlobal, false);
//getActivity().recreate();
TableLayout ll = (TableLayout) rootView.findViewById(R.id.tableLayout1);
prefs = getActivity().getPreferences(Context.MODE_PRIVATE);
String aliasname = prefs.getString(aliasnameKey, null);
System.out.println("carrying out table creation");
if (whotos.size() > 0) {
for (int i = 0; i < whotos.size(); i++) {
System.out.println("" +i);
TableRow row = new TableRow(getActivity());
TableRow.LayoutParams lp = new TableRow.LayoutParams(TableRow.LayoutParams.WRAP_CONTENT);
row.setLayoutParams(lp);
TextView tv = new TextView(getActivity());
tv.setText(whotos.get(i));
TextView tv2 = new TextView(getActivity());
tv2.setText(documents.get(i));
TextView tv3 = new TextView(getActivity());
tv3.setText(directions.get(i));
TextView tv4 = new TextView(getActivity());
tv4.setText(thedates.get(i));
row.addView(tv); //TP name
row.addView(tv2); //document type
row.addView(tv3); //direction
row.addView(tv4); //date
ll.addView(row, i+3);
}
ll.invalidate();
ll.refreshDrawableState();
}
progressDialog.dismiss();
}
}
这是fragment_transactions.xml代码
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent" android:layout_height="match_parent">
<TableLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/tableLayout1"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<TableRow
android:gravity="center"
android:id="@+id/tableRow1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<TextView
android:layout_gravity="center_horizontal"
android:id="@+id/textView1"
android:text="Transaction Report"
android:layout_span="4"
android:textAppearance="?android:attr/textAppearanceLarge"
tools:ignore="ObsoleteLayoutParam" />
</TableRow>
<TableRow
android:id="@+id/tableRow2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="5dip"
android:weightSum="4">
<TextView
android:id="@+id/tp"
android:layout_weight="1"
android:text="TP"
android:textAppearance="?android:attr/textAppearanceLarge" />
<TextView
android:id="@+id/doc"
android:layout_weight="1"
android:text="Doc"
android:textAppearance="?android:attr/textAppearanceLarge" />
<TextView
android:id="@+id/dir"
android:layout_weight="1"
android:text="Direction"
android:textAppearance="?android:attr/textAppearanceLarge" />
<TextView
android:id="@+id/date"
android:layout_weight="1"
android:text="Date"
android:textAppearance="?android:attr/textAppearanceLarge" />
</TableRow>
<!-- draw a red line -->
<View
android:layout_height="2dip"
android:background="#FF0000" />
</TableLayout>
</FrameLayout>
这样试试
public class TransactionsFragment extends Fragment {
final String urlString = "https:/exampleurl.net/restapi/Handler.ashx";
String cnoKey = "com.example.app.saveCredentials.cno";
String aliasnameKey = "com.example.app.saveCredentials.aliasname";
SharedPreferences prefs;
LayoutInflater inflaterGlobal;
ViewGroup containerGlobal;
List<String> recids;
List<String> folders;
List<String> whotos;
List<String> directions;
List<String> documents;
List<String> thedates;
View rootView;
TableLayout ll;
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
rootView = inflater.inflate(R.layout.fragment_transactions, container, false);
inflaterGlobal = inflater;
containerGlobal = container;
ll = (TableLayout) rootView.findViewById(R.id.tableLayout1);
prefs = getActivity().getPreferences(Context.MODE_PRIVATE);
String aliasname = prefs.getString(aliasnameKey, null);
new TestAsync(aliasname, "", getActivity()).execute();
return rootView;
}
class TestAsync extends AsyncTask<Void, Integer, String> {
private String aliasname;
private String password;
private String value; //success value
private String recid; //success recid
private String folder;
private String whoto;
private String direction;
private String document;
private String thedate;
private ProgressDialog progressDialog;
private Activity activity;
public TestAsync(String aliasname, String password, Activity activity) {
super();
this.password = password;
this.aliasname = aliasname;
this.activity = activity;
}
protected void onPreExecute() {
System.out.println("PreExecute");
progressDialog = ProgressDialog.show(activity, "Loading", "Loading", true);
}
protected String doInBackground(Void... arg0) {
try {
JSONObject result = GetTranReport(aliasname, "False", "1", "03", "2015");
recids = new ArrayList<>();
folders = new ArrayList<>();
whotos = new ArrayList<>();
directions = new ArrayList<>();
documents = new ArrayList<>();
thedates = new ArrayList<>();
JSONObject jsonObject;
JSONArray jsonArray = result.getJSONArray("Value");
for (int i = 0; i < jsonArray.length() - 1; i++) {
System.out.println("i = " + i);
jsonObject = jsonArray.getJSONObject(i);
System.out.println("recid = " + jsonObject.getString("recid"));
recids.add(jsonObject.getString("recid"));
folders.add(jsonObject.getString("folder"));
whotos.add(jsonObject.getString("whoto"));
directions.add(jsonObject.getString("direction"));
documents.add(jsonObject.getString("document"));
thedates.add(jsonObject.getString("thedate"));
}
} catch (Exception e) {
e.printStackTrace();
}
return "You are at PostExecute";
}
protected void onProgressUpdate(Integer... a) {
System.out.println("Progress Update" + a[0]);
}
protected void onPostExecute(String result) {
//handleLogin(value);
System.out.println("" + result);
prefs = getActivity().getPreferences(Context.MODE_PRIVATE);
String aliasname = prefs.getString(aliasnameKey, null);
System.out.println("carrying out table creation");
if (whotos.size() > 0) {
for (int i = 0; i < whotos.size(); i++) {
System.out.println("" + i);
TableRow row = new TableRow(activity);
TableRow.LayoutParams lp = new TableRow.LayoutParams(TableRow.LayoutParams.WRAP_CONTENT);
row.setLayoutParams(lp);
TextView tv = new TextView(getActivity());
tv.setText(whotos.get(i));
TextView tv2 = new TextView(getActivity());
tv2.setText(documents.get(i));
TextView tv3 = new TextView(getActivity());
tv3.setText(directions.get(i));
TextView tv4 = new TextView(getActivity());
tv4.setText(thedates.get(i));
row.addView(tv); //TP name
row.addView(tv2); //document type
row.addView(tv3); //direction
row.addView(tv4); //date
ll.addView(row, i + 3);
}
ll.invalidate();
ll.refreshDrawableState();
}
progressDialog.dismiss();
}
}
}
我是 Android 开发新手。我在这里删除了不必要的代码，但是对 Rest API 的调用没有问题。我这里有一个片段，其中有一个 table 布局。在异步任务中调用 Rest API，然后应该将检索到的数据插入 table 并刷新它。问题是 table 收到数据后不显示。有人可以指出正确的方向来解决这个问题吗？谢谢！
public class TransactionsFragment extends Fragment {
final String urlString = "https:/exampleurl.net/restapi/Handler.ashx";
String cnoKey = "com.example.app.saveCredentials.cno";
String aliasnameKey = "com.example.app.saveCredentials.aliasname";
SharedPreferences prefs;
LayoutInflater inflaterGlobal;
ViewGroup containerGlobal;
List<String> recids;
List<String> folders;
List<String> whotos;
List<String> directions;
List<String> documents;
List<String> thedates;
View rootView;
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_transactions, container, false);
inflaterGlobal = inflater;
containerGlobal = container;
TableLayout ll = (TableLayout) rootView.findViewById(R.id.tableLayout1);
prefs = getActivity().getPreferences(Context.MODE_PRIVATE);
String aliasname = prefs.getString(aliasnameKey, null);
new TestAsync(aliasname, "", getActivity()).execute();
return rootView;
}
class TestAsync extends AsyncTask<Void, Integer, String>
{
private String aliasname;
private String password;
private String value; //success value
private String recid; //success recid
private String folder;
private String whoto;
private String direction;
private String document;
private String thedate;
private ProgressDialog progressDialog;
private Activity activity;
public TestAsync(String aliasname, String password, Activity activity) {
super();
this.password = password;
this.aliasname = aliasname;
this.activity = activity;
}
protected void onPreExecute() {
System.out.println("PreExecute");
progressDialog = ProgressDialog.show(activity, "Loading", "Loading", true);
}
protected String doInBackground(Void... arg0) {
try {
JSONObject result = GetTranReport(aliasname, "False", "1", "03", "2015");
recids = new ArrayList<>();
folders = new ArrayList<>();
whotos = new ArrayList<>();
directions = new ArrayList<>();
documents = new ArrayList<>();
thedates = new ArrayList<>();
JSONObject jsonObject;
JSONArray jsonArray = result.getJSONArray("Value");
for (int i = 0; i < jsonArray.length()-1; i++) {
System.out.println("i = " + i);
jsonObject = jsonArray.getJSONObject(i);
System.out.println("recid = " + jsonObject.getString("recid"));
recids.add(jsonObject.getString("recid"));
folders.add(jsonObject.getString("folder"));
whotos.add(jsonObject.getString("whoto"));
directions.add(jsonObject.getString("direction"));
documents.add(jsonObject.getString("document"));
thedates.add(jsonObject.getString("thedate"));
}
} catch (Exception e) {
e.printStackTrace();
}
return "You are at PostExecute";
}
protected void onProgressUpdate(Integer... a) {
System.out.println("Progress Update" + a[0]);
}
protected void onPostExecute(String result) {
//handleLogin(value);
System.out.println("" + result);
View rootView = inflaterGlobal.inflate(R.layout.fragment_transactions, containerGlobal, false);
//getActivity().recreate();
TableLayout ll = (TableLayout) rootView.findViewById(R.id.tableLayout1);
prefs = getActivity().getPreferences(Context.MODE_PRIVATE);
String aliasname = prefs.getString(aliasnameKey, null);
System.out.println("carrying out table creation");
if (whotos.size() > 0) {
for (int i = 0; i < whotos.size(); i++) {
System.out.println("" +i);
TableRow row = new TableRow(getActivity());
TableRow.LayoutParams lp = new TableRow.LayoutParams(TableRow.LayoutParams.WRAP_CONTENT);
row.setLayoutParams(lp);
TextView tv = new TextView(getActivity());
tv.setText(whotos.get(i));
TextView tv2 = new TextView(getActivity());
tv2.setText(documents.get(i));
TextView tv3 = new TextView(getActivity());
tv3.setText(directions.get(i));
TextView tv4 = new TextView(getActivity());
tv4.setText(thedates.get(i));
row.addView(tv); //TP name
row.addView(tv2); //document type
row.addView(tv3); //direction
row.addView(tv4); //date
ll.addView(row, i+3);
}
ll.invalidate();
ll.refreshDrawableState();
}
progressDialog.dismiss();
}
}
这是fragment_transactions.xml代码
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent" android:layout_height="match_parent">
<TableLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/tableLayout1"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<TableRow
android:gravity="center"
android:id="@+id/tableRow1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<TextView
android:layout_gravity="center_horizontal"
android:id="@+id/textView1"
android:text="Transaction Report"
android:layout_span="4"
android:textAppearance="?android:attr/textAppearanceLarge"
tools:ignore="ObsoleteLayoutParam" />
</TableRow>
<TableRow
android:id="@+id/tableRow2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="5dip"
android:weightSum="4">
<TextView
android:id="@+id/tp"
android:layout_weight="1"
android:text="TP"
android:textAppearance="?android:attr/textAppearanceLarge" />
<TextView
android:id="@+id/doc"
android:layout_weight="1"
android:text="Doc"
android:textAppearance="?android:attr/textAppearanceLarge" />
<TextView
android:id="@+id/dir"
android:layout_weight="1"
android:text="Direction"
android:textAppearance="?android:attr/textAppearanceLarge" />
<TextView
android:id="@+id/date"
android:layout_weight="1"
android:text="Date"
android:textAppearance="?android:attr/textAppearanceLarge" />
</TableRow>
<!-- draw a red line -->
<View
android:layout_height="2dip"
android:background="#FF0000" />
</TableLayout>
</FrameLayout>
这样试试
public class TransactionsFragment extends Fragment {
final String urlString = "https:/exampleurl.net/restapi/Handler.ashx";
String cnoKey = "com.example.app.saveCredentials.cno";
String aliasnameKey = "com.example.app.saveCredentials.aliasname";
SharedPreferences prefs;
LayoutInflater inflaterGlobal;
ViewGroup containerGlobal;
List<String> recids;
List<String> folders;
List<String> whotos;
List<String> directions;
List<String> documents;
List<String> thedates;
View rootView;
TableLayout ll;
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
rootView = inflater.inflate(R.layout.fragment_transactions, container, false);
inflaterGlobal = inflater;
containerGlobal = container;
ll = (TableLayout) rootView.findViewById(R.id.tableLayout1);
prefs = getActivity().getPreferences(Context.MODE_PRIVATE);
String aliasname = prefs.getString(aliasnameKey, null);
new TestAsync(aliasname, "", getActivity()).execute();
return rootView;
}
class TestAsync extends AsyncTask<Void, Integer, String> {
private String aliasname;
private String password;
private String value; //success value
private String recid; //success recid
private String folder;
private String whoto;
private String direction;
private String document;
private String thedate;
private ProgressDialog progressDialog;
private Activity activity;
public TestAsync(String aliasname, String password, Activity activity) {
super();
this.password = password;
this.aliasname = aliasname;
this.activity = activity;
}
protected void onPreExecute() {
System.out.println("PreExecute");
progressDialog = ProgressDialog.show(activity, "Loading", "Loading", true);
}
protected String doInBackground(Void... arg0) {
try {
JSONObject result = GetTranReport(aliasname, "False", "1", "03", "2015");
recids = new ArrayList<>();
folders = new ArrayList<>();
whotos = new ArrayList<>();
directions = new ArrayList<>();
documents = new ArrayList<>();
thedates = new ArrayList<>();
JSONObject jsonObject;
JSONArray jsonArray = result.getJSONArray("Value");
for (int i = 0; i < jsonArray.length() - 1; i++) {
System.out.println("i = " + i);
jsonObject = jsonArray.getJSONObject(i);
System.out.println("recid = " + jsonObject.getString("recid"));
recids.add(jsonObject.getString("recid"));
folders.add(jsonObject.getString("folder"));
whotos.add(jsonObject.getString("whoto"));
directions.add(jsonObject.getString("direction"));
documents.add(jsonObject.getString("document"));
thedates.add(jsonObject.getString("thedate"));
}
} catch (Exception e) {
e.printStackTrace();
}
return "You are at PostExecute";
}
protected void onProgressUpdate(Integer... a) {
System.out.println("Progress Update" + a[0]);
}
protected void onPostExecute(String result) {
//handleLogin(value);
System.out.println("" + result);
prefs = getActivity().getPreferences(Context.MODE_PRIVATE);
String aliasname = prefs.getString(aliasnameKey, null);
System.out.println("carrying out table creation");
if (whotos.size() > 0) {
for (int i = 0; i < whotos.size(); i++) {
System.out.println("" + i);
TableRow row = new TableRow(activity);
TableRow.LayoutParams lp = new TableRow.LayoutParams(TableRow.LayoutParams.WRAP_CONTENT);
row.setLayoutParams(lp);
TextView tv = new TextView(getActivity());
tv.setText(whotos.get(i));
TextView tv2 = new TextView(getActivity());
tv2.setText(documents.get(i));
TextView tv3 = new TextView(getActivity());
tv3.setText(directions.get(i));
TextView tv4 = new TextView(getActivity());
tv4.setText(thedates.get(i));
row.addView(tv); //TP name
row.addView(tv2); //document type
row.addView(tv3); //direction
row.addView(tv4); //date
ll.addView(row, i + 3);
}
ll.invalidate();
ll.refreshDrawableState();
}
progressDialog.dismiss();
}
}
}