创建列表视图点击列表将显示带有问题和按钮的单选按钮。单击按钮警告对话框应该显示。现在问题我实现了那个并且它工作正常。当我回到列表视图和agin单击一个列表，然后单击一个按钮alertdialog没有显示在android ..Dont知道该做什么..我在这里发布了代码`
notesbtn.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
dialog = new Dialog(getParent());
//dialog.show();
//dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
//dialog.setCanceledOnTouchOutside(true);
//dialog.setContentView(R.layout.activity_popupwindow1);
//dialog.setContentView(view);
dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
LayoutInflater inflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View view = inflater
.inflate(R.layout.activity_popupwindow1,
null,false);
dialog.setCanceledOnTouchOutside(false);
dialog.setContentView(view);
dialog.getWindow().setBackgroundDrawable(
new ColorDrawable(0));
//dialog.getCurrentFocus();
// qPosition =McqActivity.listPosition;
//System.out.println("qqhhhhh"+qPosition);
DisplayMetrics metrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(
metrics);
int height = metrics.heightPixels;
int width = metrics.widthPixels;
dialog.getWindow().setLayout((int) (width / 1.1),
(int) (height / 1.3));
System.out.println("vvvvv"+height);
System.out.println("vvvvv"+width);
Button btnclose = (Button) dialog.findViewById(R.id.popupclosebtn);
Button btnupdate = (Button) dialog.findViewById(R.id.popupupdatebtn);
btnclose.setTypeface(lighttypeface);
btnupdate.setTypeface(lighttypeface);
ImageView imageshow = (ImageView) dialog.findViewById(R.id.popupblueview);
imageshow.setImageBitmap(bitmap);
System.out.println("imagebitmap"+bitmap);
popupfirsttext = (TextView) dialog.findViewById(R.id.popupfirsttext);
popupfirsttext.setText(McqActivity.question);
popupnotes = (TextView) dialog.findViewById(R.id.popupnotes);
popupnotes.setText(McqActivity.notes);
System.out.println("vivek"+note);
System.out.println("popupnotes : "+popupfirsttext.getText().toString());
// Display the dialog
btnupdate.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
dialog.dismiss();
Intent i = new Intent(
McqlistonitemclickactionActivity.this,
PendingtestActivity.class);
startActivity(i);
finish();
}
});
btnclose.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
dialog.dismiss();
}
});
try {
System.out.println("faulllllll");
dialog.getContext();
dialog.show();
} catch (Exception e2) {
// TODO: handle exception
e2.printStackTrace();
}
这是我获取警报对话框的代码。但这只能运行一次。
@SuppressWarnings("deprecation")
public void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_mcqlist);
db = new MySQLiteHelper(McqActivity.this);
db.openDataBase();
ParseObject.registerSubclass(MCQ.class);
// mProgressDialog= (ProgressBar)findViewById(R.id.progBarforlogin);
// final MCQ m=new MCQ();
myActivity = McqActivity.this;
mcqlistview = (MyListView) findViewById(R.id.mcqlistview);
mcq_cur_page = "secondpage";
// populateList();
// System.out.println("listmcq"+list.size());
/*
* for (MCQ mcq:list){
*
* String log = "question: "+mcq.getQuestion();
*
* System.out.println("Question: "+ mcq.getQuestion());
* //Log.d("Question: ", log); }
*/
// doSomeWork();
getdata();
System.out.println("listview");
mcqlistview
.setonRefreshListener(new com.example.pgmed.MyListView.OnRefreshListener() {
@Override
public void onRefresh() {
// TODO Auto-generated method stub
System.out.println("first stage");
new GetDataTask().execute();
}
});
mcqlistview
.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> adapterView,
View view, int position, long id) {
// TODO Auto-generated method stub
Toast.makeText(McqActivity.this, "Selected" + position,
Toast.LENGTH_SHORT).show();
if (position <= list.size()) {
System.out.println("mcq position" + position);
MCQ item = (MCQ) adapter.getItem(position - 1);
System.out.println("item" + (position - 1));
Intent i = new Intent(McqActivity.this,
McqlistonitemclickactionActivity.class);
i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
listPosition = position - 1;
id_value = item.getObjectId();
System.out.println("idval" + id_value);
question = item.getQuestion();
System.out.println("question" + question);
option1 = item.getOption1();
System.out.println("option1" + option1);
option2 = item.getOption2();
System.out.println("option2" + option2);
option3 = item.getOption3();
System.out.println("option3" + option3);
option4 = item.getOption4();
System.out.println("option4" + option4);
notes = item.getNotes();
System.out.println("notes" + notes);
image = item.getImage();
System.out.println("image" + image);
answer = item.getAnswer();
System.out.println("answer" + answer);
answered = item.getAnswered();
// i.putExtra("id",item.getId());
replaceContentView("activity_mcq", i);
// setContentView(R.layout.activity_mcq);
}
}
});
}
protected void doSomeWork() {
// TODO Auto-generated method stub
new Thread(new Runnable() {
public void run() {
while (mProgressStatus < 100) {
mProgressStatus += 1;
// Update the progress bar
mHandler.post(new Runnable() {
public void run() {
mProgressDialog.setProgress(mProgressStatus);
}
});
try {
// Display progress slowly
Thread.sleep(200);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}).start();
}
public void replaceContentView(String id, Intent newintent) {
// TODO Auto-generated method stub
View view = getLocalActivityManager().startActivity(id,
newintent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP))
.getDecorView();
McqActivity.this.setContentView(view);
}
@Override
public void onBackPressed() {
if (mcq_cur_page.equalsIgnoreCase("firstpage")) {
Intent i = new Intent(McqActivity.this, McqActivity.class);
// calls the method to replace View.
// startActivity(i1);
replaceContentView("Called", i);
} else {
/*
* AlertDialog.Builder alertDialog = new
* AlertDialog.Builder(((Activity)
* getApplicationContext()).getParent()); // Setting Dialog Title
* alertDialog.setTitle("PGMED"); // Setting Dialog Message
* alertDialog.setMessage("Do u want exit from App"); // Setting
* Icon to Dialog // alertDialog.setIcon(R.drawable.save); //
* Setting Positive "Yes" Button
* alertDialog.setPositiveButton("Yes", new
* DialogInterface.OnClickListener() { public void
* onClick(DialogInterface dialog, int which) { System.exit(0); //
* User pressed YES button. Write Logic Here } });
*
* alertDialog.setNegativeButton("No", new
* DialogInterface.OnClickListener() { public void
* onClick(DialogInterface dialog, int which) {
*
* // User pressed YES button. Write Logic Here } }); // Showing
* Alert Message alertDialog.show();
*/
// if( !exiting )
new ExitDialog(this).show();
// else
// super.onBackPressed();
// finish();
}
}
class ExitDialog extends AlertDialog {
@SuppressWarnings("deprecation")
protected ExitDialog(Context context) {
super(context);
setTitle("Exit?");
setMessage("Are you sure you want to exit?");
setButton("Yes", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
exiting = true;
System.out.println("clicked");
// System.exit(0);
Intent homeIntent = new Intent(Intent.ACTION_MAIN);
homeIntent.addCategory(Intent.CATEGORY_HOME);
homeIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(homeIntent);
}
});
setButton2("No", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
exiting = false;
}
});
// setButton(BUTTON_POSITIVE, "Yes", (OnClickListener) this);
// setButton( BUTTON_NEGATIVE, "No", this );
}
}
private class GetDataTask extends AsyncTask<Void, Void, Void> {
@Override
protected Void doInBackground(Void... params) {
System.out.println("mcqactivity");
// Simulates a background job.
ParseQuery<MCQ> query3 = new ParseQuery<MCQ>("mcq");
SimpleDateFormat format = new SimpleDateFormat(
"yyyy-MM-dd HH:mm:ss");
try {
updatedat = db.getMaxDatemcq();
createdat = db.getMaxDatemcq1();
Date up_date = format.parse(updatedat);
Date create_date = format.parse(createdat);
System.out.println("update" + up_date);
query3.whereGreaterThan("updatedAt", up_date);
query3.whereGreaterThan("createdAt", create_date);
System.out.println("data s from server" + up_date);
System.out.println("data s from" + create_date);
} catch (ParseException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
list1 = new ArrayList<MCQ>();
list1 = query3.find();
System.out.println("data s from server list" + list1.size());
} catch (com.parse.ParseException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
@Override
protected void onPreExecute() {
// SplashScreen.this.progressDialog =
// ProgressDialog.show(SplashScreen.this, "",
// "Loading...", true);
// pd.show();
super.onPreExecute();
}
@Override
protected void onProgressUpdate(Void... values) {
super.onProgressUpdate(values);
}
@Override
protected void onPostExecute(Void result) {
// Call onRefreshComplete when the list has been refreshed.
System.out.println("facts list" + list1.size());
if (list1.size() > 0) {
for (MCQ mcq : list1) {
// titles.add((String) todo.get("question"));
question = (String) mcq.get("question");
System.out.println("headline" + question);
option1 = (String) mcq.get("option1");
option2 = (String) mcq.get("option2");
option3 = (String) mcq.get("option3");
option4 = (String) mcq.get("option4");
answer = (String) mcq.get("answer");
notes = (String) mcq.get("notes");
imgnotes = (String) mcq.get("imagenotes");
answered = (String) mcq.get("answered");
// createdat=(String)mcq.get("createdAt");
// updatedat=(String)facts.get("updatedAt");
// facts.getUpdatedAt();
// System.out.println("updatedat"+updatedat);
// facts.getCreatedAt();
// SimpleDateFormat sdf = new
// SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSS'Z'");
// String strDate = sdf.format(updatedate);
id_value = (String) mcq.getObjectId();
db.add_update_mcq(mcq);
}
/*
* list1 = new ArrayList<MCQ>();
* //db.updateMCQanswered(id_value); list1 = db.getAllMCQ();
*/
System.out.println("list" + list1.size());
// setdata();
getdata();
}
mcqlistview.onRefreshComplete();
}
}
/*
* public void setdata() { // TODO Auto-generated method stub adapter = new
* McqListviewadapterActivity( McqActivity.this, list1);
*
* mcqlistview.setAdapter(adapter); adapter.notifyDataSetChanged(); }
*/
public void getdata() {
// TODO Auto-generated method stub
list = new ArrayList<MCQ>();
list = db.getAllMCQ();
adapter = new McqListviewadapterActivity(McqActivity.this, list);
mcqlistview.setAdapter(adapter);
adapter.notifyDataSetChanged();
}