我想要销毁View中创建的OnClickListener类的对象 popupView 对象。
我希望机制每次都应该创建新的View。我对创建View对象的方式有疑问。
我的完整代码：
package com.addictioncounterapp;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.DatePickerDialog;
import android.app.Dialog;
import android.app.AlertDialog.Builder;
import android.content.DialogInterface;
import android.content.Intent;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.DatePicker;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.LinearLayout.LayoutParams;
import android.widget.PopupWindow;
import android.widget.TextView;
public class AddictionDetails extends Activity
{
TextView tv_addiction_name, tv_today, tv_yesterday, tv_this_week, tv_this_month, tv_total;
ImageView iv_back, iv_filter;
int year, month, day;
int placeData;
Boolean state = false;
DatePickerDialog.OnDateSetListener dateListener;
SQLiteDatabase database;
int cat_id = 0;
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_addiction_details);
Intent intent = getIntent();
final String cat_name = intent.getStringExtra("cat_name");
tv_addiction_name = (TextView) findViewById(R.id.textViewAddictionDetails);
tv_addiction_name.setText(cat_name);
tv_total = (TextView) findViewById(R.id.textview_total);
tv_today = (TextView) findViewById(R.id.textview_today);
tv_yesterday = (TextView) findViewById(R.id.textview_yesterday);
tv_this_week = (TextView) findViewById(R.id.textview_this_week);
tv_this_month = (TextView) findViewById(R.id.textview_this_month);
iv_back = (ImageView) findViewById(R.id.imageViewAddictionDetailsBack);
iv_back.setClickable(true);
iv_back.setOnClickListener(new OnClickListener()
{
@Override
public void onClick(View v)
{
Intent intent = new Intent(AddictionDetails.this, StartActivity.class);
startActivity(intent);
}
}
);
iv_filter = (ImageView) findViewById(R.id.imageViewAddictionDetailsFilter);
iv_filter.setClickable(true);
iv_filter.setOnClickListener(new OnClickListener()
{
@Override
public void onClick(View v)
{
if(state == false)
{
state = true;
LayoutInflater layoutInflater = (LayoutInflater)getBaseContext().getSystemService(LAYOUT_INFLATER_SERVICE);
final View popupView = layoutInflater.inflate(R.layout.activity_filter_addiction_form, null);
final PopupWindow popupWindow = new PopupWindow(popupView, LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
popupWindow.setWidth(300);
popupWindow.setHeight(300);
final Calendar cal = Calendar.getInstance();
year = cal.get(Calendar.YEAR);
month = cal.get(Calendar.MONTH);
day = cal.get(Calendar.DAY_OF_MONTH);
final EditText etStartDate = (EditText)popupView.findViewById(R.id.editTextFilterStartDate);
etStartDate.setOnClickListener(new OnClickListener()
{
@Override
public void onClick(View v)
{
showDialog(1);
placeData = 1;
}
}
);
final EditText etEndDate = (EditText)popupView.findViewById(R.id.editTextFilterEndDate);
etEndDate.setOnClickListener(new OnClickListener()
{
@Override
public void onClick(View v)
{
showDialog(1);
placeData = 2;
}
}
);
Button btn_done = (Button) popupView.findViewById(R.id.buttonDone);
btn_done.setOnClickListener(new OnClickListener()
{
@Override
public void onClick(View v)
{
if(etStartDate.getText()+""=="" || etEndDate.getText()+""=="")
{
AlertDialog.Builder adb = new Builder(AddictionDetails.this);
adb.setTitle("Error");
adb.setMessage("Fields can't be blank.");
adb.setIcon(R.drawable.ic_launcher);
adb.setPositiveButton("Ok",new DialogInterface.OnClickListener()
{
public void onClick(DialogInterface dialog, int which)
{
dialog.dismiss();
}
}
);
AlertDialog ad = adb.create();
ad.show();
}
else
{
SimpleDateFormat sdf = new SimpleDateFormat("dd/MM/yyyy");
Date date1 = null;
try
{
date1 = sdf.parse(etStartDate.getText()+"");
}
catch (ParseException e)
{
e.printStackTrace();
}
Date date2 = null;
try
{
date2 = sdf.parse(etEndDate.getText()+"");
}
catch (ParseException e)
{
e.printStackTrace();
}
System.out.println(sdf.format(date1));
System.out.println(sdf.format(date2));
if(date1.compareTo(date2)>0)
{
AlertDialog.Builder adb = new Builder(AddictionDetails.this);
adb.setTitle("Error");
adb.setMessage("Start date cannot be greater than End date.");
adb.setIcon(R.drawable.ic_launcher);
adb.setPositiveButton("Ok",new DialogInterface.OnClickListener()
{
public void onClick(DialogInterface dialog, int which)
{
dialog.dismiss();
}
}
);
AlertDialog ad = adb.create();
ad.show();
}
else
{
Intent intent = new Intent(AddictionDetails.this, FilteredData.class);
intent.putExtra("start_date", etStartDate.getText()+"");
intent.putExtra("end_date", etEndDate.getText()+"");
intent.putExtra("cat_id", cat_id);
intent.putExtra("cat_name", cat_name);
startActivity(intent);
}
}
}
}
);
Button btn_cancel = (Button) popupView.findViewById(R.id.buttonCancel);
btn_cancel.setOnClickListener(new OnClickListener()
{
@Override
public void onClick(View v)
{
popupWindow.dismiss();
state = false;
}
}
);
dateListener = new DatePickerDialog.OnDateSetListener()
{
@Override
public void onDateSet(DatePicker view, int yr, int monthOfYear, int dayOfMonth)
{
SimpleDateFormat tmpDateFormat = new SimpleDateFormat("dd/MM/yyyy");
Calendar tmpC1 = Calendar.getInstance();
tmpC1.set(yr, monthOfYear, dayOfMonth);
Date tmpD1 = tmpC1.getTime();
String tmpDateString = tmpDateFormat.format(tmpD1);
update(placeData, tmpDateString);
}
private void update(int position, String strDate)
{
switch(position)
{
case 1:
Log.e("In Addiction details In startDate", strDate);
etStartDate.setText(strDate);
break;
case 2:
Log.e("In Addiction details In endDate", strDate);
etEndDate.setText(strDate);
break;
}
}
};
popupWindow.showAsDropDown(iv_filter, 0, 0);
}
}
}
);
loadDB();
Cursor cursor = database.query("category", new String[]{"cat_id"}, "cat_name=?", new String[]{cat_name}, null, null, null);
//----------------------fetching id-------------------
if(cursor.getCount() > 0)
while(cursor.moveToNext())
cat_id = cursor.getInt(0);
cursor.close();
//----------------------fetching total-------------------
int totalCounter;
Cursor totalCursor = database.rawQuery("select sum(cat_attribute_unit) from counter where cat_id ="+cat_id+";", null);
if(totalCursor.moveToNext())
totalCounter = totalCursor.getInt(0);
else
totalCounter = 0;
totalCursor.close();
tv_total.setText(totalCounter+"");
//----------------------fetching today's count---------------
Calendar cal1 = Calendar.getInstance();
SimpleDateFormat dateFormat1 = new SimpleDateFormat("dd/MM/yyyy");
String todays_date = dateFormat1.format(cal1.getTime());
int todayCounter;
Cursor todayCursor = database.rawQuery("select sum(cat_attribute_unit) from counter where cat_id ="+cat_id+" AND counter_entry_date = '"+todays_date+"';", null);
if(todayCursor.moveToNext())
todayCounter = todayCursor.getInt(0);
else
todayCounter = 0;
todayCursor.close();
tv_today.setText(todayCounter+"");
//----------------------fetching yesterdays count------------------
Calendar cal2 = Calendar.getInstance();
SimpleDateFormat dateFormat2 = new SimpleDateFormat("dd/MM/yyyy");
cal2.add(Calendar.DATE, -1);
String yesterdays_date = dateFormat2.format(cal2.getTime());
int yesterdayCounter = 0;
Cursor yesterdayCursor = database.rawQuery("select sum(cat_attribute_unit) from counter where cat_id ="+cat_id+" AND counter_entry_date = '"+yesterdays_date+"';", null);
if(yesterdayCursor.moveToFirst())
yesterdayCounter = yesterdayCursor.getInt(0);
else
yesterdayCounter = 0;
yesterdayCursor.close();
tv_yesterday.setText(yesterdayCounter+"");
//-------------------------fetching current week count--------------------
SimpleDateFormat weekDateFormat = new SimpleDateFormat("dd/MM/yyyy");
Calendar c1 = Calendar.getInstance();
c1.set(Calendar.DAY_OF_WEEK, 1);
Date weekFirstDate = c1.getTime();
String strWeekFirstDay = weekDateFormat.format(weekFirstDate);
Cursor weekCursor = database.rawQuery("select sum(cat_attribute_unit) from counter where cat_id ="+cat_id+" AND counter_entry_date BETWEEN '"+strWeekFirstDay+"' AND '"+todays_date+"';", null);
int weekCounter = 0;
if(weekCursor.moveToFirst())
weekCounter = weekCursor.getInt(0);
else
weekCounter = 0;
weekCursor.close();
tv_this_week.setText(weekCounter+"");
//----------------------fetching current month count--------------------
SimpleDateFormat monthDateFormat = new SimpleDateFormat("dd/MM/yyyy");
Calendar c2 = Calendar.getInstance();
c2.set(Calendar.DAY_OF_MONTH, 1);
Date monthFirstDate = c2.getTime();
String strMonthFirstDay = monthDateFormat.format(monthFirstDate);
Cursor monthCursor = database.rawQuery("select sum(cat_attribute_unit) from counter where cat_id ="+cat_id+" AND counter_entry_date BETWEEN '"+strMonthFirstDay+"' AND '"+todays_date+"';", null);
int monthCounter = 0;
if(monthCursor.moveToFirst())
monthCounter = monthCursor.getInt(0);
else
monthCounter = 0;
monthCursor.close();
tv_this_month.setText(monthCounter+"");
database.close();
}
private void loadDB()
{
database = openOrCreateDatabase("AddictionCounter.db", SQLiteDatabase.OPEN_READWRITE, null);
}
protected Dialog onCreateDialog(int id)
{
return new DatePickerDialog(this, dateListener, year, month, day);
}
}
此外，我无法在OnClickListener的IF循环中引用任何类。在给出 Ctrl + space 时会出错。
答案 0 :(得分：1)
在
处销毁popupViewpopupWindow.setOnDismissListener
答案 1 :(得分：1)
首先尝试回答，如果我必须重新阅读，请纠正我。
我认为通常的做法是创建一个成员popupWindow，然后使用setContentView和dismiss来显示或不显示它。但是，如果你真的需要销毁它并在每次onClick时创建它：
你是什么意思你不能在听众中引用任何课程？你的意思是你不能调用像onPause（）方法这样的东西吗？为了以防万一，考虑到当你在侦听器中执行此操作时，您不再从Activity中执行此操作。如果你需要引用onCreateDialog或其他东西你可以通过getParent
来完成