我正在使用BaseAdapter班级。我想在其中显示DatePickerDialog。
当我使用showDialog(DATE_DIALOG_ID);时，我收到错误。
请指导我。
package com.OrganisemeePhone.adapter;
import java.util.ArrayList;
import java.util.Vector;
import android.app.Activity;
import android.app.DatePickerDialog;
import android.app.Dialog;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.graphics.Color;
import android.graphics.Paint;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.provider.OpenableColumns;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.View.OnClickListener;
import android.widget.BaseAdapter;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.DatePicker;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.CompoundButton.OnCheckedChangeListener;
public class TaskFilterAdapter extends BaseAdapter {
String date, month, year,setdueDate;
//int dateFormat;
DatePickerDialog.OnDateSetListener dateListener;
int myYear, myMonth, myDay;
int dateFormat;
int starcount=0;
public TaskFilterAdapter datedialog;
viewholder holder;
LayoutInflater inflator;
ArrayList<Integer> taskId = new ArrayList<Integer>();
ArrayList<String> task = new ArrayList<String>();
ArrayList<String> dueDate = new ArrayList<String>();
ArrayList<Integer> priority = new ArrayList<Integer>();
static final int DATE_DIALOG_ID = 0;
Vector<Boolean> VectorCheckChange = new Vector<Boolean>();
Vector<Object> taskrow = new Vector<Object>();
static int pos;
Context context;
private boolean isdaymonth;
public TaskFilterAdapter(Context context,ArrayList<Integer> taskId, ArrayList<String> task, ArrayList<Integer> priority, ArrayList<String> duedate) {
super();
inflator = LayoutInflater.from(context);
this.taskId = taskId;
this.context=context;
this.task = task;
this.dueDate = duedate;
this.priority = priority;
//dateFormat=LoginActivity.db.getdateformat();
getDateFormate();
dateFormat=LoginActivity.db.getdateformat();
getDateFormate();
for(int i=0; i<task.size(); i++)
{
VectorCheckChange.add(false);
}
}
@Override
public int getCount() {
// TODO Auto-generated method stub
return task.size();
}
@Override
public Object getItem(int arg0) {
// TODO Auto-generated method stub
return null;
}
@Override
public long getItemId(int arg0) {
// TODO Auto-generated method stub
return 0;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
if(convertView==null)
{
holder = new viewholder();
convertView = inflator.inflate(R.layout.task_row, null);
holder.task = (TextView)convertView.findViewById(R.id.task_row_text);
holder.date = (TextView)convertView.findViewById(R.id.task_row_date_text);
holder.star = (ImageView)convertView.findViewById(R.id.task_row_star);
holder.chk = (CheckBox)convertView.findViewById(R.id.task_row_check_box);
holder.task.setOnClickListener(new Clicker());
holder.chk.setOnCheckedChangeListener(new Checker());
holder.star.setOnClickListener(new Clicker());
holder.date.setOnClickListener(new Clicker());
setviewAsSettings();
setviewAsSettings();
convertView.setTag(holder);
}
else
{
holder=(viewholder)convertView.getTag();
}
pos = position;
/****************** Set Task *************************/
holder.task.setText(task.get(position));
holder.task.setTag(position);
holder.star.setTag(position);
holder.date.setTag(position);
/***************** Set Duedate ***********************/
setdueDate = dueDate.get(position);
month = setdueDate.substring(5, 7);
date = setdueDate.substring(8, 10);
if (!date.equals("00"))
{
if (isdaymonth)
if (isdaymonth)
{
holder.date.setText(date + "." + month + ".");
Log.d("taskList Adapter"," date formate day month ");
}
else
{
holder.date.setText(month + "." + date + ".");
Log.d("taskList Adapter"," date formate month day");
}
}
else
{
holder.date.setText("");
}
/***************** Set Priority ***********************/
if (priority.get(position).equals(-1) || priority.get(position).equals(0)|| priority.get(position).equals(3))
{
holder.star.setBackgroundDrawable(context.getResources().getDrawable(R.drawable.star_low));
}
else if (priority.get(position).equals(2))
{
holder.star.setBackgroundDrawable(context.getResources().getDrawable(R.drawable.star_med));
}
else if (priority.get(position).equals(1))
{
holder.star.setBackgroundDrawable(context.getResources().getDrawable(R.drawable.star_high));
}
/******************* Set tag in checkBox ******************************/
holder.chk.setTag(position);
if(VectorCheckChange.get(position))
{
holder.chk.setChecked(true);
holder.task.setPaintFlags(holder.task.getPaintFlags() | Paint.STRIKE_THRU_TEXT_FLAG);
holder.task.setTextColor(Color.parseColor("#848484"));
holder.date.setPaintFlags(holder.task.getPaintFlags() | Paint.STRIKE_THRU_TEXT_FLAG);
holder.date.setTextColor(Color.parseColor("#848484"));
holder.task.setClickable(false);
holder.task.setEnabled(false);
}
else
{
holder.chk.setChecked(false);
holder.task.setPaintFlags(holder.task.getPaintFlags() & ~ Paint.STRIKE_THRU_TEXT_FLAG);
holder.task.setTextColor(Color.parseColor("#000000"));
holder.date.setPaintFlags(holder.task.getPaintFlags() & ~ Paint.STRIKE_THRU_TEXT_FLAG);
holder.date.setTextColor(Color.parseColor("#000000"));
holder.task.setClickable(true);
holder.task.setEnabled(true);
}
return convertView;
}
// updates by nilesh
public void setviewAsSettings(){
//check for task setting
SharedPreferences startup_pref =
PreferenceManager.getDefaultSharedPreferences(context);
Boolean viewpriority=startup_pref.getBoolean("viewpriority", true);
Boolean viewduedate=startup_pref.getBoolean("viewduedate", true);
if(!viewpriority){
holder.star.setVisibility(View.INVISIBLE);
}
if(!viewduedate){
holder.date.setVisibility(View.INVISIBLE);
}
//check for task setting completed
}
public class viewholder
{
TextView task,date;
ImageView star;
CheckBox chk;
}
public class Clicker implements OnClickListener
{
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
int position=(Integer)v.getTag();
int setPriority = 0;
if(v.getId() == holder.date.getId())
{
Log.i("Date Dialog Picker", "Click Date..................... ");
((Activity)context).showDialog(DATE_DIALOG_ID);
//.showDialog(DATE_DIALOG_ID);
//.showDialog(DATE_DIALOG_ID);
}
dateListener = new DatePickerDialog.OnDateSetListener() {
@Override
public void onDateSet(DatePicker view, int yr, int monthOfYear,
int dayOfMonth) {
// TODO Auto-generated method stub
myYear = yr;
myMonth = monthOfYear;
myDay = dayOfMonth;
}
};
if(v.getId() == holder.task.getId())
{
Intent display_int= new Intent(context, DisplyTaskActivity.class);
display_int.putExtra(constantcode.TASK_ID,taskId.get(position));
v.getContext().startActivity(display_int);
Log.i("TaskList Adapter", "Task ....position...... "+holder.star.getTag());
}
if(v.getId() == holder.star.getId())
{
if (priority.get(position).equals(-1) || priority.get(position).equals(0) || priority.get(position).equals(3))
{
priority.set(position, 2);
setPriority = 2;
holder.star.setBackgroundDrawable(context.getResources().getDrawable(R.drawable.star_low));
Log.d("TaskList Adapter", "----- Grey ----");
}
else if (priority.get(position).equals(2))
{
priority.set(position, 1);
setPriority = 1;
holder.star.setBackgroundDrawable(context.getResources().getDrawable(R.drawable.star_med));
Log.d("TaskList Adapter", "----- Yellow ----");
}
else if (priority.get(position).equals(1))
{
priority.set(position, 0);
setPriority = 0;
holder.star.setBackgroundDrawable(context.getResources().getDrawable(R.drawable.star_high));
Log.d("TaskList Adapter", "----- Orange ----");
}
String updateQuery = "update tbl_tasks set priority =" + setPriority + " where taskId="+ taskId.get(position);
LoginActivity.db.execNonQuery(updateQuery);
taskrow = LoginActivity.db.getTaskRow(taskId.get(position));
if(taskrow.get(2).toString().contains("'"))
{
taskrow.set(2, taskrow.get(2).toString().replace("'", "''"));
}
String insertQuery = "insert into tbl_update_tasks(taskId,listId,description,priority,dueDate,reminderId,senderId,receiverId,taskCategoryType,fadeDate,assignedId)values("+ taskrow.get(0) + ","+ taskrow.get(1)+ ",'"+ taskrow.get(2)+ "',"+ taskrow.get(3)+ ",'"+ taskrow.get(4)+ "',"+ taskrow.get(5)+ ","+ taskrow.get(6)+ ","+ taskrow.get(7)+ ",'"+ taskrow.get(8)+ "','"+ taskrow.get(9)+ "',"+ taskrow.get(10)+ ");";
LoginActivity.db.execNonQuery(insertQuery);
notifyDataSetChanged();
}
//Log.w("taskfilterAdapter","position....... "+v.getTag());
}
}
Dialog onCreateDialog(int id){
switch(id) {
case DATE_DIALOG_ID:
return new DatePickerDialog(this.context, dateListener, myYear, myMonth,myDay);
}
return null;
}
/* public class datedialogclicker extends Activity
{
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
holder.date.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Log.v("New Class....", "Click OnClick.....");
showDialog(DATE_DIALOG_ID);
}
});
dateListener = new DatePickerDialog.OnDateSetListener() {
@Override
public void onDateSet(DatePicker view, int yr, int monthOfYear,
int dayOfMonth) {
// TODO Auto-generated method stub
myYear = yr;
myMonth = monthOfYear;
myDay = dayOfMonth;
}
};
}
protected Dialog onCreateDialog(int id){
switch(id) {
case DATE_DIALOG_ID:
return new DatePickerDialog(context, dateListener, myYear, myMonth,myDay);
}
return null;
}
}*/
public class Checker implements OnCheckedChangeListener
{
@Override
public void onCheckedChanged(CompoundButton buttonView,
boolean isChecked) {
// TODO Auto-generated method stub
int posi=(Integer)buttonView.getTag();
if(isChecked)
{
VectorCheckChange.set(posi, true);
}
else
{
VectorCheckChange.set(posi, false);
}
notifyDataSetChanged();
}
}
// update by nilesh
public void getDateFormate() {
// Get the app's shared preferences
SharedPreferences startup_pref = PreferenceManager
.getDefaultSharedPreferences(context);
// Get the value for the run counter
isdaymonth = startup_pref.getBoolean(constantcode.ISDAYMONTH, true);
}
}
答案 0 :(得分：3)
（1）在BaseAdapter onClick
中定义此代码((Activity)AdapterName.this.context).showDialog(DATE_DIALOG_ID);
（2）以下活动代码：
DatePickerDialog.OnDateSetListener dateListener = new DatePickerDialog.OnDateSetListener() {
@Override
public void onDateSet(DatePicker view, int yr, int monthOfYear,
int dayOfMonth) {
// TODO Auto-generated method stub
myYear = yr;
myMonth = monthOfYear;
myDay = dayOfMonth;
}
};
Calendar cal = Calendar.getInstance();
myYear = cal.get(Calendar.YEAR);
myMonth = cal.get(Calendar.MONTH);
myDay = cal.get(Calendar.DAY_OF_MONTH);
protected Dialog onCreateDialog(int id){
switch(id) {
case DATE_DIALOG_ID:
return new DatePickerDialog(ActivityName.this, dateListener, myYear, myMonth, myDay);
}
return null;
}
答案 1 :(得分：1)
错误很容易证明：编译错误也不例外 - showDialog是Activity类的一种方法。 Android开发人员很容易忘记所有这些不错的辅助方法也应该由某些类提供吗？
所以问题是OnClickListener不是Activity。使类的构造函数接受单个参数活动，将其存储在局部变量中，然后调用其方法showDialog：
private Activity activity;
public Clicker(Activity activity) {
this.activity = activity;
}
...
this.activity.showDialog();
...
答案 2 :(得分：0)
我遇到了将listpicker的值存储在listview中但解决了它的问题。这是它的代码。希望它有所帮助。
import java.util.ArrayList;
import java.util.Calendar;
import android.app.Activity;
import android.app.DatePickerDialog;
import android.app.Dialog;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.DatePicker;
import android.widget.ListView;
import android.widget.TextView;
public class DAteDemo extends Activity{
private ListView listViewScore = null;
private ListViewAdapter listViewAdapter = null;
static final int DATE_DIALOG_ID = 0;
private int mYear;
private int mMonth;
private int mDay;
int globalPosition; //used for storing the position of textview clicked for setting the date
ArrayList<String> mfddateList = null;
int viewlength = 30;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
listViewScore=(ListView)findViewById(R.id.listViewScore);
mfddateList = new ArrayList<String>();
for(int i=0;i<30;i++){
mfddateList.add("");
}
final Calendar c = Calendar.getInstance();
mYear = c.get(Calendar.YEAR);
mMonth = c.get(Calendar.MONTH);
mDay = c.get(Calendar.DAY_OF_MONTH);
listViewAdapter = new ListViewAdapter();
listViewScore.setAdapter(listViewAdapter);
}
class ListViewAdapter extends BaseAdapter{
@Override
public int getCount() {
return viewlength;
}
@Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return null;
}
@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return 0;
}
@Override
public View getView(int position, View view, ViewGroup parent) {
// TODO Auto-generated method stub
final ViewHolder viewHolder ;
View rowView=view;
if(rowView==null){
LayoutInflater layoutinflate =LayoutInflater.from(DAteDemo.this);
rowView=layoutinflate.inflate(R.layout.listviewnewtext, parent, false);
viewHolder = new ViewHolder();
viewHolder.et_Sort_Order = (TextView)rowView.findViewById(R.id.et_Sort_Order);
//Setting listen to the text box
viewHolder.et_Sort_Order.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
showDialog(DATE_DIALOG_ID);
globalPosition = viewHolder.ref; // this is used to update the date
Log.i("Log","date:-- "+viewHolder.ref);
}
});
rowView.setTag(viewHolder);
}else{
viewHolder = (ViewHolder) rowView.getTag();
}
viewHolder.ref = position;
viewHolder.et_Sort_Order.setText(mfddateList.get(position));
return rowView;
}
}//class ends
class ViewHolder{
TextView et_Sort_Order;
int ref;
}
// the callback received when the user "sets" the date in the dialog
public DatePickerDialog.OnDateSetListener mDateSetListener =
new DatePickerDialog.OnDateSetListener() {
public void onDateSet(DatePicker view, int year,
int monthOfYear, int dayOfMonth) {
mYear = year;
mMonth = monthOfYear;
String date = (mMonth + 1)+"/"+mYear;
mfddateList.set(globalPosition,date);
Log.i("Log", "i m in dateset "+globalPosition);
listViewAdapter.notifyDataSetChanged(); //for updating the date change
}
};
@Override
protected Dialog onCreateDialog(int id) {
switch (id) {
case DATE_DIALOG_ID:
return new DatePickerDialog(DAteDemo.this,mDateSetListener,mYear, mMonth,mDay );
}
return null;
}
}//ActivityEnds
**main.xml**
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<ListView
android:layout_width="match_parent"
android:id="@+id/listViewScore"
android:cacheColorHint="#00000000"
android:layout_height="match_parent"
android:layout_weight="1.00"
android:divider="#C0C0C0"
android:layout_below="@+id/layout"
android:dividerHeight="2dip"
android:background="@android:color/white" />
**listviewnewtext.xml**
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingTop="2dip"
android:paddingBottom="0dip"
>
<TextView
android:textColor="@android:color/black"
android:layout_height="wrap_content"
android:layout_width="80dip"
android:focusable="false"
android:id="@+id/et_Sort_Order"
>
</TextView>
</LinearLayout>