android如何获取datepicker和; timepicker通过图像按钮单击
主要的是为ListActivity设置listadapter我使用了不同的适配器类（TaskAdapter.java），其中我覆盖了getview（）并在那里我编写了代码foe复选框，textview＆amp; ImageView的。 TextView＆amp;复选框点击活动＆amp; checkedchange工作＆amp; ImageViews点击事件也有效。但问题是我试图在点击ImageView时打开DatePicker但它在快照中显示下面的错误。
我的代码在这里， HomeActivity
package com.v3.todo;
import java.util.ArrayList;
import java.util.Calendar;
import android.app.AlertDialog;
import android.app.DatePickerDialog;
import android.app.Dialog;
import android.app.ListActivity;
import android.app.TimePickerDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.database.Cursor;
import android.os.Bundle;
import android.view.ContextMenu;
import android.view.ContextMenu.ContextMenuInfo;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnFocusChangeListener;
import android.widget.AdapterView.AdapterContextMenuInfo;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.DatePicker;
import android.widget.EditText;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.RelativeLayout;
import android.widget.TextView;
import android.widget.TimePicker;
public class HomeActivity extends ListActivity {
DBAdapter db;
Cursor cr;
CheckBox[] chk;
static String[] valChk;
static int Task_Id, taskId;
static int[] idchk;
static String Task_Nm, taskNm;
EditText edTask;
Button btnAdd;
String newTask = "";
int order;
Calendar c = Calendar.getInstance();
private int mYear, mMonth, mDay, mHour, mMinute;
static final int TIME_DIALOG_ID = 1, DATE_DIALOG_ID = 0;
String date = "", time = "", dateTime = "";
// ArrayList al = new ArrayList();
static ArrayList<Task> m_tasks = new ArrayList<Task>(), t_tasks = null;
TaskAdapter m_adapter;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
this.setTitle("To-Do Lists");
btnAdd = (Button) findViewById(R.id.btnAdd);
edTask = (EditText) findViewById(R.id.etAddTask);
edTask.setOnFocusChangeListener(new OnFocusChangeListener() {
@Override
public void onFocusChange(View v, boolean hasFocus) {
if (hasFocus == true) {
if (edTask.getText().toString()
.compareTo("Add task here...") == 0) // default text
{
edTask.setText("");
}
}
}
});
db = new DBAdapter(HomeActivity.this);
m_tasks = getTasks();
if (m_tasks.size() != 0) {
this.m_adapter = new TaskAdapter(this, R.layout.addchecktomain,
m_tasks);
// lv1.setAdapter(this.m_adapter);
System.out.println("creating");
setListAdapter(this.m_adapter);
} else {
RelativeLayout rl = (RelativeLayout) findViewById(R.id.layout);
TextView tv = new TextView(this);
tv.setText("No To-Do Lists");
tv.setTextSize(22);
rl.addView(tv);
}
btnAdd.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
newTask = edTask.getText().toString();
String min = Integer.toString(c.get(Calendar.MINUTE));
String hr = Integer.toString(c.get(Calendar.HOUR));
String dd = Integer.toString(c.get(Calendar.DATE));
String mm = Integer.toString(c.get(Calendar.MONTH));
String yyyy = Integer.toString(c.get(Calendar.YEAR));
if (min.length() == 1)
min = "0" + min;
if (hr.length() == 1)
hr = "0" + hr;
if (dd.length() == 1)
dd = "0" + dd;
if (mm.length() == 1)
mm = "0" + mm;
String dtCreate = mm + "-" + dd + "-" + yyyy + " " + hr + ":"
+ min;
if (newTask.equals("")) {
alertboxNeutral("Warning", "Task should not be empty!",
"Okay");
}
if (newTask.length() < 2) {
alertboxNeutral("Warning",
"Task should not be less than 2 Letters", "Okay");
} else {
try {
db.open();
long id1;
order = db.getLastPriority();
if (order == 0)
id1 = db.insertINtask(taskNm, dtCreate, null, 0, 1);
else
id1 = db.insertINtask(taskNm, dtCreate, null, 0,
order + 1);
} catch (Exception ex) {
System.out.println("Within AddTask " + ex.toString());
} finally {
db.close();
}
alertboxNeutral("Success", "Saved.", "Okay");
}
}
});
}
// Method to fetch Uncompleted tasks from db with ID
public ArrayList<Task> getTasks() {
t_tasks = new ArrayList<Task>();
try {
db.open();
cr = db.getUncompletedTask();
if (cr.moveToFirst()) {
do {
Task t1 = new Task();
String[] str = new String[2];
str[0] = cr.getString(0);
str[1] = cr.getString(1);
t1.setTaskID(cr.getString(0));
t1.setTaskName(cr.getString(1));
t_tasks.add(t1);
} while (cr.moveToNext());
}
} catch (Exception ex) {
System.out.println("Within Home " + ex.toString());
} finally {
cr.close();
db.close();
}
return t_tasks;
}
@Override
public void onCreateContextMenu(ContextMenu menu, View v,
ContextMenuInfo menuInfo) {
super.onCreateContextMenu(menu, v, menuInfo);
AdapterContextMenuInfo info = (AdapterContextMenuInfo) menuInfo;
menu.setHeaderTitle("Task");
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.context_menu, menu);
System.out.println("v.getId=" + v.getId());
Task_Id = (Integer) v.getTag();
}
@Override
public boolean onContextItemSelected(MenuItem item) {
AdapterContextMenuInfo info = (AdapterContextMenuInfo) item
.getMenuInfo();
switch (item.getItemId()) {
case R.id.edit_task:
Intent i1 = new Intent(HomeActivity.this, EditTaskActivity.class);
i1.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK
| Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(i1);
return true;
case R.id.delete_task:
// database functions
boolean f = false;
try {
db.open();
f = db.deleteTask(Task_Id);
} catch (Exception ex) {
System.out.println("Within Home " + ex.toString());
} finally {
db.close();
}
if (f == true)
alertboxNeutral("Success", "Deleted.", "Okay");
return true;
default:
return super.onContextItemSelected(item);
}
}
public void alertboxNeutral(String title, String message, String positive) {
AlertDialog.Builder alertbox = new AlertDialog.Builder(
HomeActivity.this);
if (title.equals("Warning")) {
alertbox.setTitle(title);
alertbox.setMessage(message);
alertbox.setPositiveButton(positive,
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
Intent i = new Intent(HomeActivity.this,
HomeActivity.class);
i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK
| Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(i);
}
});
alertbox.show();
} else if (title.equals("Success")) {
alertbox.setTitle(title);
alertbox.setMessage(message);
alertbox.setPositiveButton(positive,
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
Intent i = new Intent(HomeActivity.this,
HomeActivity.class);
i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK
| Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(i);
}
});
alertbox.show();
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.add_task:
Intent i1 = new Intent(this, AddTaskActivity.class);
i1.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK
| Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(i1);
break;
case R.id.list_completed:
Intent i2 = new Intent(this, ListCompletedActivity.class);
i2.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK
| Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(i2);
break;
case R.id.rearrange:
Intent i3 = new Intent(this, RearrangeActivity.class);
i3.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK
| Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(i3);
break;
case R.id.exit:
Intent intent = new Intent(Intent.ACTION_MAIN);
intent.addCategory(Intent.CATEGORY_HOME);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
break;
}
return true;
}
/*
* @Override protected void onPause() { // TODO Auto-generated method stub
* super.onPause(); finish(); }
*/
@Override
protected void onResume() {
// TODO Auto-generated method stub
try {
db.open();
m_tasks = getTasks();
} catch (Exception ex) {
System.out.println("Within Home " + ex.toString());
} finally {
db.close();
}
m_adapter = new TaskAdapter(this, R.layout.addchecktomain, m_tasks);
System.out.println("notify data changed");
// m_adapter.notifyDataSetInvalidated();
// m_adapter.notifyDataSetChanged();
setListAdapter(this.m_adapter);
super.onResume();
}
/*
* @Override public void onBackPressed() { // TODO Auto-generated method
* stub db.open(); m_tasks = getTasks(); db.close();
* System.out.println("notify data changed on back pressed");
* m_adapter.notifyDataSetInvalidated(); m_adapter.notifyDataSetChanged();
* super.onBackPressed(); }
*/
private DatePickerDialog.OnDateSetListener mDateSetListener = new DatePickerDialog.OnDateSetListener() {
public void onDateSet(DatePicker view, int year, int monthOfYear,
int dayOfMonth) {
mYear = year;
mMonth = monthOfYear;
mDay = dayOfMonth;
updateDisplay();
}
};
private void updateDisplay() {
// tvDt.setText(new StringBuilder().append(mMonth +
// 1).append("-").append(mDay).append("-").append(mYear).append(" "));
}
// the callback received when the user "sets" the time in the dialog
private TimePickerDialog.OnTimeSetListener mTimeSetListener = new TimePickerDialog.OnTimeSetListener() {
public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
mHour = hourOfDay;
mMinute = minute;
updateDisplay();
}
};
// updates the time we display in the TextView
private void timeDisplay() {
// time=(String)(new
// StringBuilder().append(pad(mHour)).append(":").append(pad(mMinute)));
}
private static String pad(int c) {
if (c >= 10)
return String.valueOf(c);
else
return "0" + String.valueOf(c);
}
protected Dialog onCreateDialog(int id) {
switch (id) {
case 0:
return new DatePickerDialog(this, mDateSetListener, mYear, mMonth,
mDay);
}
return null;
}
public static void setDate() {
// showDialog(0);
}
}
TaskAdapter.java
package com.v3.todo;
import java.util.ArrayList;
import java.util.Calendar;
import android.app.Activity;
import android.app.DatePickerDialog;
import android.app.Dialog;
import android.app.TimePickerDialog;
import android.content.Context;
import android.content.Intent;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.View.OnTouchListener;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.CompoundButton.OnCheckedChangeListener;
import android.widget.DatePicker;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.TimePicker;
import android.widget.Toast;
public final class TaskAdapter extends ArrayAdapter<Task> {
ArrayList<Task> tasks;
Context context1;
CheckBox chk;
TextView tv;
ImageView imgAlram;
DBAdapter db;
static int TaskId;
static int RId;
Calendar c = Calendar.getInstance();
boolean f = false;
private int mYear, mMonth, mDay, mHour, mMinute;
static final int TIME_DIALOG_ID = 1, DATE_DIALOG_ID = 0;
String date = "", time = "", dateTime = "";
public TaskAdapter(Context context, int textViewResourceId,
ArrayList<Task> tasks) {
super(context, textViewResourceId, tasks);
this.tasks = tasks;
context1 = context;
RId = textViewResourceId;
}
public int getCount() {
return tasks.size();
}
public Task getItem(int position) {
return tasks.get(position);
}
public long getItemId(int position) {
return position;
}
public View getView(int position, View convertView, ViewGroup parent) {
final int pos = position;
final int dbid;
View v = convertView;
if (v == null) {
LayoutInflater vi = (LayoutInflater) context1
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
v = vi.inflate(R.layout.addchecktomain, null);
}
Task t = tasks.get(position);
if (t != null) {
chk = (CheckBox) v.findViewById(R.id.cboTask);
tv = (TextView) v.findViewById(R.id.tvTask);
imgAlram = (ImageView) v.findViewById(R.id.imageAlram);
if (chk != null) {
chk.setId(Integer.parseInt(t.getTaskId()));
chk.setText("");
// chk.setTag(Integer.parseInt(t.getTaskId()), t.getTaskName());
chk.setOnCheckedChangeListener(new OnCheckedChangeListener() {
public void onCheckedChanged(CompoundButton buttonView,
boolean isChecked) {
int taskId = buttonView.getId();
if (isChecked) {
// /call setTaskComplete(i)
// / reset list view or refresh list view
String min = Integer.toString(c
.get(Calendar.MINUTE));
String hr = Integer.toString(c.get(Calendar.HOUR));
String dd = Integer.toString(c.get(Calendar.DATE));
String mm = Integer.toString(c.get(Calendar.MONTH));
String yyyy = Integer.toString(c.get(Calendar.YEAR));
if (min.length() == 1)
min = "0" + min;
if (hr.length() == 1)
hr = "0" + hr;
if (dd.length() == 1)
dd = "0" + dd;
if (mm.length() == 1)
mm = "0" + mm;
String dtComplete = mm + "-" + dd + "-" + yyyy
+ " " + hr + ":" + min;
try {
db = new DBAdapter(context1);
db.open();
f = db.setTaskComplete(taskId, dtComplete);
} catch (Exception ex) {
System.out.println("Within Home "
+ ex.toString());
} finally {
db.close();
}
if (f == true) {
// HomeActivity.referesh = 1;
Intent intent = new Intent(context1,
HomeActivity.class);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK
| Intent.FLAG_ACTIVITY_CLEAR_TOP);
// HomeActivity.
context1.startActivity(intent);
Toast.makeText(context1, "Task Completed",
Toast.LENGTH_LONG).show();
}
}
}
});
}
if (tv != null) {
tv.setText(t.getTaskName());
dbid = Integer.parseInt(t.getTaskId());
tv.setTag(dbid);
tv.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
Toast.makeText(
context1,
"You have chosen the task: " + " "
+ v.getTag().toString() + " Id: "
+ dbid + "::" + pos, Toast.LENGTH_LONG)
.show();
}
});
((Activity) context1).registerForContextMenu(tv);
}
if (imgAlram != null) {
imgAlram.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
// Write ur code here
Toast.makeText(context1, "You have chosen the Alram ",
Toast.LENGTH_LONG).show();
((Activity) context1).showDialog(0);
((Activity) context1).showDialog(TIME_DIALOG_ID);
}
});
}
}
return v;
}
DatePicker对话框仅在活动中打开，但我调用（（Activity）context1）.showDialog（0）;在ImageView onClick事件中的TaskAdapter.java类中，所有其他代码都在HomeActivity中。它会像快照一样给出错误。如何在TaskAdapter.java类中实现。请给我答案。 谢谢
3 个答案:
答案 0 :(得分：1)
从1开始，而不是从0开始。你必须有某个地方mDay = 0;
答案 1 :(得分：1)
DatePicker的日期中有 IllegalArgumentException （请阅读第2和第4条红线以了解我是如何知道的）。第9条红线告诉我问题出在你的 HomeActivity.java 文件的第363行中，这是 onCreateDialog 方法的一部分。在这种情况下，它显然是DatePickerDialog构造函数。
正如dziobas所说，有可能你有一个基本的零日，这可能是问题所在。 mDay可以设置为比该月允许的数字更高的数字。您可能希望初始化私有mDay = 1而不是保持原样。
答案 2 :(得分：1)
并且默认情况下，DatePickerDialog中的月份值始终从0开始，因此您打印月份的值，如果您得到0，则添加+1
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