****工作代码已发布****
我正在尝试更新文本将从ArrayList动态编程的按钮。正在从mySQL中检索数据。我可以获取数据并用我需要的数据填充数组（familyMemberArray）。但是由于某些原因，在收集信息时，程序不会在生成数组信息之后继续实现“趋势”数组或其余的布局编程。
我需要首先制定数据，以便知道数组有多大来创建必要的按钮数量。如果我调用一个基本的String数组，它就可以很好地填充按钮。我记得在一个uni项目上被困在这个问题上并最终放弃了，因为我无法让它工作，时间在流逝。请把我从痛苦中解脱出来
public class TrendingMealsFragment extends Fragment {
private TableRow tr;
//SQLite Database
private static final String SELECT_SQL = "SELECT * FROM family_account";
private SQLiteDatabase db;
private Cursor c;
private static final String DATABASE_NAME = "FamVsFam.db";
// Logging
private final String TAG = this.getClass().getName();
private static final String EXTRA_CHALLENGE_ID = "boo.famvsfam.challenge_id";
//Results
private JSONArray resultFamilyMember;
private String dbID;
public static final String JSON_ARRAY = "result";
private List<String> familyMemberArray;
ArrayAdapter<String> adapter;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
openDatabase();
setHasOptionsMenu(true);
c = db.rawQuery(SELECT_SQL, null);
c.moveToFirst();
getRecords();
}
protected void openDatabase() {
db = getActivity().openOrCreateDatabase(DATABASE_NAME, android.content.Context.MODE_PRIVATE, null); // db = SQLiteDatabase.openOrCreateDatabase("FamVsFam", Context.MODE_PRIVATE, null);
}
protected void getRecords() {
dbID = c.getString(0);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
getData();
/** Declaring an ArrayAdapter to set items to ListView */
familyMemberArray = new ArrayList<>();
//Menu
setHasOptionsMenu(true);
ActionBar actionBar = ((AppCompatActivity) getActivity()).getSupportActionBar();
actionBar.setDisplayHomeAsUpEnabled(true);
View view = inflater.inflate(R.layout.activity_resturants, container, false);
AppCompatActivity activity = (AppCompatActivity) getActivity();
activity.getSupportActionBar();
/**
ArrayList<String> trending1 = new ArrayList<String>() {
{
add("one");
add("two");
add("three");
add("four");
add("five");
add("six");
add("seven");
add("eight");
add("nine");
add("ten");
add("eleven");
}
};*/
ArrayList<String> trending = new ArrayList<String>() {
{
for(int i = 0; i < familyMemberArray.size() ; i++){
add(familyMemberArray.get(i));
}}
};
// LAYOUT SETTING 1
RelativeLayout root = new RelativeLayout(getActivity());
// root.setId(Integer.parseInt(MEAL_SELECTION_ID));
LayoutParams param1 = new LayoutParams(
LayoutParams.MATCH_PARENT,
LayoutParams.MATCH_PARENT);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH) {
root.setFitsSystemWindows(true);
}
root.setLayoutParams(param1);
//LAYOUT SETTINGS 2 - TOP BANNER - WITH PAGE HEADING
RelativeLayout rLayout1 = new RelativeLayout(getActivity());
LayoutParams param2 = new LayoutParams(
LayoutParams.MATCH_PARENT,
LayoutParams.MATCH_PARENT);
float topBannerDim = getResources().getDimension(R.dimen.top_banner);
param2.height = (int) topBannerDim;
param2.addRule(RelativeLayout.BELOW, root.getId());
int ele = (int) getResources().getDimension(R.dimen.elevation);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
rLayout1.setElevation(ele);
}
rLayout1.setBackgroundColor(Color.parseColor("#EEEBAA"));
rLayout1.setLayoutParams(param2);
//TEXT VIEW
TextView text1 = new TextView(getActivity());
text1.setText(R.string.diet_req);
LayoutParams param3 = new LayoutParams(
LayoutParams.WRAP_CONTENT,
LayoutParams.WRAP_CONTENT);
param3.addRule(RelativeLayout.CENTER_VERTICAL, RelativeLayout.TRUE);
text1.setTextColor(Color.parseColor("#8A1F1D"));
text1.setTypeface(Typeface.DEFAULT_BOLD);
text1.setLayoutParams(param3);
//LAYOUT SETTINGS 4
RelativeLayout rLayout4 = new RelativeLayout(getActivity());
LayoutParams param5 = new LayoutParams(
LayoutParams.MATCH_PARENT,
LayoutParams.MATCH_PARENT);
topBannerDim = getResources().getDimension(R.dimen.top_banner);
param5.height = (int) topBannerDim;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
param5.addRule(RelativeLayout.ALIGN_PARENT_LEFT, RelativeLayout.ALIGN_START);
}
param5.addRule(RelativeLayout.BELOW, rLayout1.getId());
rLayout4.setId(R.id.id_relative_4);
rLayout4.setBackgroundColor(Color.parseColor("#EEEBAA"));
rLayout4.setLayoutParams(param5);
//LAYOUT SETTINGS 5
TableLayout rLayout5 = new TableLayout(getActivity());
rLayout5.setOrientation(TableLayout.VERTICAL);
LayoutParams param7 = new LayoutParams(
LayoutParams.MATCH_PARENT,
LayoutParams.MATCH_PARENT);
param7.addRule(RelativeLayout.BELOW, rLayout4.getId());
rLayout5.setBackgroundColor(Color.parseColor("#EEEBAA"));
rLayout5.setLayoutParams(param7);
// List<ToggleButton> togButtStore = new ArrayList<ToggleButton>();
int i = 0;
while (i < trending.size()) {
if (i % 3 == 0) {
tr = new TableRow(getActivity());
rLayout5.addView(tr);
}
ToggleButton toggleBtn = new ToggleButton(getActivity());
toggleBtn.setText(trending.get(i));
toggleBtn.setId(i);
toggleBtn.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
if (isChecked) {
Context context = getActivity().getApplicationContext();
CharSequence text = "Hello toast!";
int duration = Toast.LENGTH_SHORT;
Toast toast = Toast.makeText(context, text, duration);
toast.show();
} else {
// The toggle is disabled
}
}
});
tr.addView(toggleBtn);
i++;
}
//LAYOUT SETTINGS 6
FrameLayout youBeenFramed = new FrameLayout(getActivity());
LayoutParams param8 = new LayoutParams(
LayoutParams.MATCH_PARENT,
LayoutParams.WRAP_CONTENT);
param8.addRule(RelativeLayout.BELOW, rLayout5.getId());
youBeenFramed.setBackgroundColor(Color.parseColor("#EEEBAA"));
root.addView(youBeenFramed);
root.addView(rLayout1);
rLayout1.addView(text1);
root.addView(rLayout4);
root.addView(rLayout5);
getActivity().setContentView(root);
return view;
}
public void getData() {
//// TODO: 03/08/2016 Progress Dialogs : on getting data
// final ProgressDialog loading = ProgressDialog.show(getActivity(), "Loading Data", "Please wait...", false, false);
StringRequest strReq = new StringRequest(Request.Method.POST,
PHPConfigURLS.URL_ALL_FAMILY_MEMBERS, new Response.Listener<String>() {
@Override
public void onResponse(String response) {
Log.d(TAG, "Login Response: " + response.toString());
JSONObject j = null;
try {
// loading.dismiss();
//Parsing the fetched Json String to JSON Object
j = new JSONObject(response);
//Storing the Array of JSON String to our JSON Array
resultFamilyMember = j.getJSONArray(JSON_ARRAY);
//Calling method getStudents to get the students from the JSON Array
getDBFamilyName(resultFamilyMember);
} catch (JSONException e) {
// JSON error
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
}
}) {
@Override
protected Map<String, String> getParams() {
String id = dbID;
// Posting params to register url
Map<String, String> params = new HashMap<String, String>();
params.put("id", id);
// params.put("email", email);
// params.put("password", password);
return params;
}
};
RequestQueue requestQueue = Volley.newRequestQueue(getActivity());
//Adding request to the queue
requestQueue.add(strReq);
}
private void getDBFamilyName(JSONArray j) {
//Traversing through all the items in the json array
for (int i = 0; i < j.length(); i++) {
FamilyAccount familyMember = new FamilyAccount();
try {
//Getting json object
JSONObject json = j.getJSONObject(i);
familyMember = new FamilyAccount();
familyMember.setName(json.getString("name"));
familyMember.setID(json.getInt("id"));
} catch (JSONException e) {
e.printStackTrace();
}
//Adding the title of the challenge to array list
familyMemberArray.add(familyMember.getName());
}
}
}
提前致谢
答案 0 :(得分：1)
由于某种原因，在收集信息时，程序不会在生成数组信息后继续实现“趋势”数组或其余的布局编程。
这是因为当您在请求完成时调用此布局时，布局不会“动态”更新。
familyMemberArray.add(familyMember.getName());
您必须清除视图，并重新添加所有视图，或者将所有视图生成代码“提取”到它自己的方法中，您可以使用ArrayList的参数调用它。
基本上，// LAYOUT SETTING 1和return view（不包含）之间的所有内容都需要移动到public void generateView(ArrayList<String> familyMemberArray)方法中，如果需要，该方法可以选择性地返回生成的根视图。
然后，在getFamilyName()的末尾，在循环外部，使用您的ArrayList调用该方法。
我需要首先制定数据，以便知道数组有多大来创建必要的按钮数量。
我不确定我知道你在做什么。除非你的意思是
while (i < trending.size()) {
相反，trending是与familyMemberArray完全不同的列表引用，因此它也不会更新。虽然，它包含完全相同的数据？
ArrayList<String> trending = new ArrayList<String>() {
{
for(int i = 0; i < familyMemberArray.size() ; i++){
add(familyMemberArray.get(i));
}}
};
考虑到ArrayList构造函数已经提供了该功能
，那段代码看起来有点奇怪ArrayList<String> trending = new ArrayList<String>(familyMemberArray);
答案 1 :(得分：0)
*****工作代码******贷记给cricket_007
<强>字段
public class TrendingMealsFragment extends Fragment {
// Logging
private final String TAG = this.getClass().getName();
//Results
private JSONArray resultFamilyMember;
public static final String JSON_ARRAY = "result";
private ArrayList<String> familyMemberArray;
//Layout
private TableRow tr;
<强> OnCreateView（）
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.activity_resturants, container, false);
generateView(familyMemberArray);
getData();
return view;
}
<强>的GetData（）
public void getData() {
StringRequest strReq = new StringRequest(Request.Method.POST,
PHPConfigURLS.URL_ALL_FAMILY_MEMBERS, new Response.Listener<String>() {
@Override
public void onResponse(String response) {
Log.d(TAG, "Login Response: " + response.toString());
JSONObject j = null;
try {
//Parsing the fetched Json String to JSON Object
j = new JSONObject(response);
//Storing the Array of JSON String to our JSON Array
resultFamilyMember = j.getJSONArray(JSON_ARRAY);
//Calling method getStudents to get the students from the JSON Array
getDBFamilyName(resultFamilyMember);
} catch (JSONException e) {
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
}
}) {
@Override
protected Map<String, String> getParams() {
String id = dbID;
Map<String, String> params = new HashMap<String, String>();
params.put("id", id);
return params;
}
};
RequestQueue requestQueue = Volley.newRequestQueue(getActivity());
//Adding request to the queue
requestQueue.add(strReq);
}
<强> getDBFamilyName（）
private void getDBFamilyName(JSONArray j) {
//Traversing through all the items in the json array
for (int i = 0; i < j.length(); i++) {
FamilyAccount familyMember = new FamilyAccount();
try {
//Getting json object
JSONObject json = j.getJSONObject(i);
familyMember = new FamilyAccount();
familyMember.setName(json.getString("name"));
familyMember.setID(json.getInt("id"));
} catch (JSONException e) {
e.printStackTrace();
}
//Adding the title of the challenge to array list
familyMemberArray.add(familyMember.getName());
generateView(familyMemberArray);
}
}
<强> generateView（）
public View generateView(ArrayList<String> familyMemberArray) {
...
rLayout5.setLayoutParams(param7);
//Create Buttons
int i = 0;
while (i < familyMemberArray.size()) {
if (i % 3 == 0) {
tr = new TableRow(getActivity());
rLayout5.addView(tr);
}
ToggleButton toggleBtn = new ToggleButton(getActivity());
toggleBtn.setText(familyMemberArray.get(i));
toggleBtn.setId(i);
toggleBtn.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
if (isChecked) {
Context context = getActivity().getApplicationContext();
CharSequence text = "Hello toast!";
int duration = Toast.LENGTH_SHORT;
Toast toast = Toast.makeText(context, text, duration);
toast.show();
} else {
// The toggle is disabled
}
}
});
tr.addView(toggleBtn);
i++;
}
...
root.addView(rLayout5);
getActivity().setContentView(root);
return root;
}
}