好的，我有一个非常奇怪的错误!当我旋转屏幕两次时，viewPager 中的 ListView 将消失，但这只会在我更改 viewPager 的上下文时发生，它是一个 listView(但正如我所说，当我第一次旋转时它工作正常，当我不'通过按下 radioGroup 来改变 viewpager):
我认为问题应该是当我通过 radio 组更改 viewpager 内的适配器时 (我的意思是这段代码):
myViewpager.setAdapter(new ViewPagerAdapter(fragManag, false));
myViewpager.setCurrentItem(200);
或 fragment 内的 ListView (哪个 viewAdapter)使用: (这段代码):
public View getView(int position, View convertView, ViewGroup parent) {
View row = convertView;
if (row == null) {
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
row = inflater.inflate(R.layout.list_view_in_money_manager, parent, false);
}
TextView category = (TextView) row.findViewById(R.id.textView1x);
TextView amount = (TextView) row.findViewById(R.id.textView2x);
category.setText(categoryArray[position]);
amount.setText(amountArray[position] + MoneyManager.DOLLAR);
if (expanseB[position]) {
amount.setTextColor(Color.parseColor("#FFFF4444"));
} else {
amount.setTextColor(Color.parseColor("#0000FF"));
}
return row;
}
任何建议都会很棒:)
这里是所有的代码:
public class MoneyManager extends FragmentActivity implements FragmentChangeMoneyDialog.Communicator, OnCheckedChangeListener {
// ...some def
FragmentMoneyTotal frgTotalListView;
@Override
protected void onCreate(Bundle savedInstanceState) {
// ...some def
radioGroup1.setOnCheckedChangeListener(this);
radioGroup2.setOnCheckedChangeListener(this);
// Create a ViewPager
android.support.v4.app.FragmentManager fragManag = getSupportFragmentManager();
myViewpager.setAdapter(new ViewPagerAdapter(fragManag, false));
myViewpager.setCurrentItem(200);
}
}
@Override
public void onCheckedChanged(RadioGroup group, int checkedId) {
// montly or total
if (group == radioGroup1) {
switch (checkedId) {
case R.id.radioButton1:
rG1 = false;
rgCheck();
break;
case R.id.radioButton2:
rG1 = true;
rgCheck();
break;
}
}
// show all or show by cat
if (group == radioGroup2) {
// false : showAll True: show by category
switch (checkedId) {
// show all
case R.id.rg2radioButton1:
rG2 = false;
rgCheck();
break;
// show by cat
case R.id.rg2radioButton2:
rG2 = true;
rgCheck();
break;
}
}
}
// TODO checking for radio group
public void rgCheck() {
android.support.v4.app.FragmentManager fragManag = getSupportFragmentManager();
if (!rG2) {
myViewpager.setAdapter(new ViewPagerAdapter(fragManag, false));
myViewpager.setCurrentItem(200);
} else {
myViewpager.setAdapter(new ViewPagerAdapter(fragManag, true));
myViewpager.setCurrentItem(200);
}
}
class ViewPagerAdapter extends FragmentStatePagerAdapter {
boolean radioGroup2Track;
public ViewPagerAdapter(android.support.v4.app.FragmentManager fm, boolean rG) {
super(fm);
this.radioGroup2Track = rG;
}
@Override
public android.support.v4.app.Fragment getItem(int position) {
android.support.v4.app.Fragment frag = null;
frag = FragmentMoneyMontly.newInstance(position - 200, radioGroup2Track);
return frag;
}
@Override
public int getCount() {
return 401;
}
@Override
public CharSequence getPageTitle(int position) {
Calendar cal = Calendar.getInstance();
for (int i = 0; i < 199; i++) {
if (position == i) {
cal.add(Calendar.MONTH, i - 200);
return (cal.get(Calendar.MONTH) + 1) + "-" + cal.get(Calendar.YEAR);
}
}
if (position == 199) {
return "Prev Month";
}
// show today month
if (position == 200) {
return "This Month";
}
if (position == 201) {
return "Next Month";
}
// Show next month
for (int i = 202; i <= 400; i++) {
if (position == i) {
cal.add(Calendar.MONTH, i - 200);
return (cal.get(Calendar.MONTH) + 1) + "-" + cal.get(Calendar.YEAR);
}
}
return null;
}
}
}
下面是 View 组内 fragment 的代码:
public class FragmentMoneyMontly extends Fragment {
private static final String TEXT_AT_END = "Total : ";
ListView transactionListV;
TextView totalMontlyTV;
int dateposition = 0;
public static FragmentMoneyMontly newInstance(int index, boolean radioGTrack) {
FragmentMoneyMontly f = new FragmentMoneyMontly();
// Supply index, radioTrack input as an argument.
Bundle args = new Bundle();
args.putInt("index", index);
args.putBoolean("radioGtrack", radioGTrack);
f.setArguments(args);
return f;
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.activity_fragment_money_manager, container, false);
transactionListV = (ListView) view.findViewById(R.id.transactionData1);
totalMontlyTV = (TextView) view.findViewById(R.id.totalMontly);
HulkDataBaseAdapter db = new HulkDataBaseAdapter(getActivity());
// getting from new instance method
dateposition = getArguments().getInt("index", -1000);
boolean rgTrack = getArguments().getBoolean("radioGtrack", false);
// error checking
if (dateposition == -1000) {
Toast.makeText(getActivity(), "Something Went Wrong", Toast.LENGTH_SHORT).show();
} else {
setDateListView(db, rgTrack);
}
return view;
}
public void setTextView() {
}
public void setDateListView(HulkDataBaseAdapter db, boolean rgTrack) {
Calendar cal = Calendar.getInstance();
for (int i = -200; i < 0; i++) {
if (dateposition == i) {
cal.add(Calendar.MONTH, i);
String monthString = String.format("%02d", (cal.get(Calendar.MONTH) + 1));
String yearString = String.valueOf(cal.get(Calendar.YEAR));
showListView(monthString, yearString, db, rgTrack);
}
}
// show today month
if (dateposition == 0) {
String currentMonth = String.format("%02d", cal.get(Calendar.MONTH) + 1);
String currentYear = String.valueOf(cal.get(Calendar.YEAR));
showListView(currentMonth, currentYear, db, rgTrack);
}
// Show next month
for (int i = 1; i <= 200; i++) {
if (dateposition == i) {
cal.add(Calendar.MONTH, i);
String monthString = String.format("%02d", (cal.get(Calendar.MONTH) + 1));
String yearString = String.valueOf(cal.get(Calendar.YEAR));
showListView(monthString, yearString, db, rgTrack);
}
}
}
public void showListView(String currentMonth, String currentYear, HulkDataBaseAdapter db, boolean rgTrack) {
// init
String[] catArray = null;
String[] amountArray = null;
boolean[] expenseArray = null;
int currCount = db.selectCatFromDate(currentMonth, currentYear).length;
// if DB is not empty
if (currCount != 0) {
// ADD count to amount and disply it in TextView
int countAmount = 0;
// Show each individual (based on RadioGroup)
if (rgTrack == false) {
// initialization
catArray = new String[currCount];
amountArray = new String[currCount];
expenseArray = new boolean[currCount];
// set cat amount expanse to array
for (int i = 0, c = currCount; i < currCount; i++) {
// Show it in reverse (last item first)
String catThis = db.selectCatFromDate(currentMonth, currentYear)[i];
int amountInt = db.selectAmountFromDate(currentMonth, currentYear)[i];
boolean expenseThis = db.selectExpenseFromDate(currentMonth, currentYear)[i];
String amountThis;
if (expenseThis) {
amountInt = amountInt * (-1);
countAmount -= amountInt;
amountThis = String.valueOf(amountInt);
} else {
countAmount += amountInt;
amountThis = "+"+String.valueOf(amountInt);
}
// saving in reverse format
c--;
catArray[c] = catThis;
amountArray[c] = amountThis;
expenseArray[c] = expenseThis;
}
// set the adapter and show it
CustomAdapter adapter = new CustomAdapter(getActivity(), catArray, amountArray, expenseArray);
transactionListV.setAdapter(adapter);
// show count to textview text: Total : x $
String textCountAll = TEXT_AT_END + countAmount + MoneyManager.DOLLAR;
totalMontlyTV.setText(textCountAll);
}
// Show by Category (based on RadioGroup)
else {
String[] catAllArray = db.selectAllCategoryTable();
int countCat = catAllArray.length;
String[] amountAllArray = new String[countCat];
boolean[] expenseAllArray = new boolean[countCat];
for (int i = 0; i < countCat; i++) {
int ThisAmount = db.totalAmountOfCatFromDateCategoryTable(catAllArray[i], currentMonth, currentYear);
countAmount += ThisAmount;
if (ThisAmount < 0){
expenseAllArray[i] = true;
amountAllArray[i] = String.valueOf(ThisAmount);
}
else {
expenseAllArray[i] = false;
amountAllArray[i] = "+"+String.valueOf(ThisAmount);
}
}
CustomAdapter adapter = new CustomAdapter(getActivity(), catAllArray, amountAllArray, expenseAllArray);
transactionListV.setAdapter(adapter);
}
String textCountAll = TEXT_AT_END + countAmount + MoneyManager.DOLLAR;
totalMontlyTV.setText(textCountAll);
}
// if Transaction DB is empty
else {
String[] noString = { MoneyManager.NOTHING };
ArrayAdapter<String> adapterNo = new ArrayAdapter<>(getActivity(), android.R.layout.simple_list_item_1, noString);
transactionListV.setAdapter(adapterNo);
}
}
}
// Custom adapter for List View
class CustomAdapter extends ArrayAdapter<String> {
Context context;
String[] categoryArray;
String[] amountArray;
boolean[] expanseB;
public CustomAdapter(Context c, String[] categoty, String[] amount, boolean[] expanse) {
super(c, R.layout.list_view_in_money_manager, R.id.textView1x, categoty);
this.context = c;
this.amountArray = amount;
this.categoryArray = categoty;
this.expanseB = expanse;
}
int count = 0;
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View row = convertView;
if (row == null) {
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
row = inflater.inflate(R.layout.list_view_in_money_manager, parent, false);
}
TextView category = (TextView) row.findViewById(R.id.textView1x);
TextView amount = (TextView) row.findViewById(R.id.textView2x);
category.setText(categoryArray[position]);
amount.setText(amountArray[position] + MoneyManager.DOLLAR);
if (expanseB[position]) {
amount.setTextColor(Color.parseColor("#FFFF4444"));
} else {
amount.setTextColor(Color.parseColor("#0000FF"));
}
return row;
}
}
最佳答案
如何在 androidmanifest.xml 内的 activity 标签 中添加 android:configChanges="orientation|keyboardHidden|screenSize|keyboard" 它永远不会重新创建您的 View ，甚至改变了您不想管理任何实例管理的方向。如果你想在方向改变期间做一些任务，你可以在你的 Activity 中覆盖 onConfigurationChanged()
关于android - 当我旋转屏幕时出现奇怪的错误，viewpager 内的 ListView 将消失，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/27128107/