我正在尝试在按钮和文本视图下放置一个列表。
代码已经对我有用，但后来我尝试将所有列表复选框标记为选中，从现在开始，当应用程序启动时，我看到空白的黑屏。
线性布局下的我的ListFragment。
这是代码：
main.xml中
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<Button
android:id="@+id/button_date"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/ch_label" />
<Button
android:id="@+id/button_start_time"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/ch_start_time_label" />
<Button
android:id="@+id/button_end_time"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/ch_end_time_label" />
<TextView
android:id="@+id/date_label"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/cur_date"
android:textAppearance="?android:attr/textAppearanceLarge" />
<TextView
android:id="@+id/text_date"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge" />
<DatePicker
android:id="@+id/date_picker"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<TimePicker
android:id="@+id/start_time_picker"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<TimePicker
android:id="@+id/end_time_picker"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="1"
android:orientation="vertical"
android:id="@+id/c_sms_list">
</LinearLayout>
</LinearLayout >
row_view.xml
<?xml version="1.0" encoding="utf-8"?>
<CheckedTextView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/checkedTextView1"
android:layout_width="match_parent"
android:layout_height="?android:attr/listPreferredItemHeight"
android:checkMark="?android:attr/listChoiceIndicatorMultiple"
android:background="?android:attr/activatedBackgroundIndicator"
android:text="CheckedTextView" />
MainActivity.java
package com.javacodegeeks.android.datepickerexample;
import java.text.Format;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import android.app.Activity;
import android.app.DatePickerDialog;
import android.app.Dialog;
import android.app.FragmentManager;
import android.app.TimePickerDialog;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.DatePicker;
import android.widget.TextView;
import android.widget.TimePicker;
import android.app.ListActivity;
import android.database.Cursor;
import android.os.Bundle;
import android.provider.CalendarContract;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.Toast;
import android.support.v4.app.Fragment;
import android.support.v4.app.DialogFragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentTransaction;
import android.text.format.DateFormat;
import android.text.format.Time;
import static java.lang.System.out;
public class MainActivity extends FragmentActivity {
private TextView text_date;
private DatePicker date_picker;
private TimePicker start_time_picker;
private TimePicker end_time_picker;
private c_sms_list m_fragment_sms_list;
private Button date_button;
private Button start_time_button;
private Button end_time_button;
private int year;
private int month;
private int day;
private int start_hour;
private int start_minute;
private int end_hour;
private int end_minute;
static final int DATE_DIALOG_ID = 100;
static final int START_TIME_DIALOG_ID = 101;
static final int END_TIME_DIALOG_ID = 102;
private Cursor mCursor = null;
private static final String[] COLS = new String[] { CalendarContract.Events.TITLE, CalendarContract.Events.DTSTART};
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
m_fragment_sms_list = new c_sms_list();
setCurrentDate();
addButtonListener();
android.support.v4.app.FragmentManager fragmentManager = getSupportFragmentManager();
FragmentTransaction trans = fragmentManager.beginTransaction();
m_fragment_sms_list.mEventsList = retreive_events();
trans.add(R.id.c_sms_list, m_fragment_sms_list);
trans.commit();
//]4ListView lView = m_fragment_sms_list.getListView();
//if (lView != null && lView.getCount()>0) lView.getChildAt(0).setSelected(true);
}
// display current date both on the text view and the Date Picker
public void setCurrentDate() {
text_date = (TextView) findViewById(R.id.text_date);
date_picker = (DatePicker) findViewById(R.id.date_picker);
start_time_picker = (TimePicker) findViewById(R.id.start_time_picker);
end_time_picker = (TimePicker) findViewById(R.id.end_time_picker);
final Calendar calendar = Calendar.getInstance();
year = calendar.get(Calendar.YEAR);
month = calendar.get(Calendar.MONTH);
day = calendar.get(Calendar.DAY_OF_MONTH);
start_hour = 7;
start_minute = 0;
end_hour = 18;
end_minute = 0;
String date_string = new StringBuilder()
.append(day).append("-")
.append(month + 1).append("-")
.append(year).append(" ").toString();
String start_time_string = new StringBuilder()
.append(" START time ")
.append(pad(start_hour)).append(":")
.append(pad(start_minute)).append(" ").toString();
String end_time_string = new StringBuilder()
.append(" END time ")
.append(pad(end_hour)).append(":")
.append(pad(end_minute)).append(" ").toString();
// set current date into textview
text_date.setText(new StringBuilder()
// Month is 0 based, so you have to add 1
.append(date_string)
.append(start_time_string)
.append(end_time_string)
);
// set current date into Date Picker
date_picker.init(year, month, day, null);
date_picker.setVisibility(DatePicker.GONE);
date_button = (Button) findViewById(R.id.button_date);
date_button.setText(date_string);
start_time_button = (Button) findViewById(R.id.button_start_time);
end_time_button = (Button) findViewById(R.id.button_end_time);
initTimePickerAndButton(start_time_picker, start_hour, start_minute, start_time_button, start_time_string);
initTimePickerAndButton(end_time_picker, end_hour, end_minute, end_time_button, end_time_string);
}
public void addButtonListener() {
// Date Picker
date_button = (Button) findViewById(R.id.button_date);
date_button.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
showDialog(DATE_DIALOG_ID);
}
});
// Start Time Picker
start_time_button = (Button) findViewById(R.id.button_start_time);
start_time_button.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
showDialog(START_TIME_DIALOG_ID);
}
});
// End Time Picker
end_time_button = (Button) findViewById(R.id.button_end_time);
end_time_button.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
showDialog(END_TIME_DIALOG_ID);
}
});
}
@Override
protected Dialog onCreateDialog(int id) {
switch (id) {
case DATE_DIALOG_ID:
// set date picker as current date
return new DatePickerDialog(this, datePickerListener, year, month,day);
case START_TIME_DIALOG_ID:
// set date picker as current date
return new TimePickerDialog(this, startTimePickerListener, start_hour, start_minute, false);
case END_TIME_DIALOG_ID:
// set date picker as current date
return new TimePickerDialog(this, endTimePickerListener, end_hour, end_minute, false);
}
return null;
}
private DatePickerDialog.OnDateSetListener datePickerListener = new DatePickerDialog.OnDateSetListener() {
// when dialog box is closed, below method will be called.
public void onDateSet(DatePicker view, int selectedYear,int selectedMonth, int selectedDay) {
year = selectedYear;
month = selectedMonth;
day = selectedDay;
// set selected date into Text View
text_date.setText(new StringBuilder()
// Month is 0 based, so you have to add 1
.append(day).append("-")
.append(month + 1).append("-")
.append(year).append(" ")
.append(year).append(" at time ")
.append(pad(start_hour)).append(":")
.append(pad(start_minute)).append(" ")
);
// set selected date into Date Picker
date_picker.init(year, month, day, null);
// update list
ArrayList<String> updated_events = retreive_events();
m_fragment_sms_list.mEventsList.clear();
m_fragment_sms_list.mEventsList.addAll(updated_events);
//m_fragment_sms_list.update_list();
m_fragment_sms_list.mArrayAdapter.notifyDataSetChanged();
}
};
private TimePickerDialog.OnTimeSetListener startTimePickerListener = new TimePickerDialog.OnTimeSetListener() {
public void onTimeSet(TimePicker view, int selectedHour, int selectedMinute) {
start_hour = selectedHour;
start_minute = selectedMinute;
String date_string = new StringBuilder()
.append(day).append("-")
.append(month + 1).append("-")
.append(year).append(" ").toString();
String start_time_string = new StringBuilder()
.append(" start time ")
.append(pad(start_hour)).append(":")
.append(pad(start_minute)).append(" ").toString();
String end_time_string = new StringBuilder()
.append(" start time ")
.append(pad(end_hour)).append(":")
.append(pad(end_minute)).append(" ").toString();
// set current date into textview
text_date.setText(new StringBuilder()
// Month is 0 based, so you have to add 1
.append(date_string)
.append(start_time_string)
.append(end_time_string)
);
initTimePickerAndButton(start_time_picker, start_hour, start_minute, start_time_button, start_time_string);
}
};
private TimePickerDialog.OnTimeSetListener endTimePickerListener = new TimePickerDialog.OnTimeSetListener() {
public void onTimeSet(TimePicker view, int selectedHour, int selectedMinute) {
end_hour = selectedHour;
end_minute = selectedMinute;
String date_string = new StringBuilder()
.append(day).append("-")
.append(month + 1).append("-")
.append(year).append(" ").toString();
String start_time_string = new StringBuilder()
.append(" start time ")
.append(pad(start_hour)).append(":")
.append(pad(start_minute)).append(" ").toString();
String end_time_string = new StringBuilder()
.append(" start time ")
.append(pad(end_hour)).append(":")
.append(pad(end_minute)).append(" ").toString();
// set current date into textview
text_date.setText(new StringBuilder()
// Month is 0 based, so you have to add 1
.append(date_string)
.append(start_time_string)
.append(end_time_string)
);
initTimePickerAndButton(end_time_picker, end_hour, end_minute, end_time_button, end_time_string);
}
};
private static String pad(int c) {
if (c >= 10)
return String.valueOf(c);
else
return "0" + String.valueOf(c);
}
private void initTimePickerAndButton(TimePicker time_picker, int hour, int minute, Button time_button, String time_string) {
time_picker.setVisibility(TimePicker.GONE);
time_picker.setIs24HourView(Boolean.TRUE);
time_picker.setCurrentHour(hour);
time_picker.setCurrentMinute(minute);
time_button.setText(time_string);
int a;
a=5;
}
// ==================================
// CALENDAR HANDLING
// ==================================
ArrayList<String> retreive_events() {
Log.d("SHIMI", "SHALOM SHALOM");
Calendar c_start= Calendar.getInstance();
c_start.set(2014,3,7,0,0); //Note that months start from 0 (January)
Calendar c_end= Calendar.getInstance();
c_end.set(2014,3,7,0,0); //Note that months start from 0 (January)
Time t = new Time();
//t.setToNow();
t.set(0, start_minute, start_hour, day, month, year);
String dtStart = Long.toString(t.toMillis(false));
t.set(59, end_minute, end_hour, day, month, year);
String dtEnd = Long.toString(t.toMillis(false));
String selection = "((" + CalendarContract.Events.DTSTART + " <= ?) AND (" + CalendarContract.Events.DTEND + " >= ?))";
String[] selectionArgs = new String[] { dtEnd, dtStart};
Log.d("SHIMI", "got here before query");
mCursor = getContentResolver().query(CalendarContract.Events.CONTENT_URI, COLS, selection, selectionArgs, null);
Log.d("SHIMI", "got here after query");
mCursor.moveToFirst();
Log.d("SHIMI", "got here after query 2");
return from_cursor_to_string_arr();
}
ArrayList<String> from_cursor_to_string_arr() {
Log.d("SHIMI", "start of to string array");
ArrayList<String> string_arr = new ArrayList<String>();
String title = "N/A";
Long start = 0L;
while(!mCursor.isLast()) {
Format df = DateFormat.getDateFormat(this);
SimpleDateFormat sdf = new SimpleDateFormat("dd/MM");
Format tf = DateFormat.getTimeFormat(this);
try {
title = mCursor.getString(0);
start = mCursor.getLong(1);
} catch (Exception e) {
//ignore
}
String event_details_str = new StringBuilder()
.append(title)
.append(" בתאריך ")
.append(sdf.format(start))
.append(" בשעה ")
.append(tf.format(start))
.toString();
string_arr.add(event_details_str);
mCursor.moveToNext();
}
return string_arr;
}
}
c_sms_list.java（这是我希望它列出的片段）
package com.javacodegeeks.android.datepickerexample;
import java.util.ArrayList;
import android.app.ListActivity;
import android.support.v4.app.Fragment;
import android.support.v4.app.ListFragment ;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.Toast;
import android.view.View;
import android.widget.ListView;
public class c_sms_list extends ListFragment {
ArrayList<String> mEventsList;
String[] mEventListValueArray;
ArrayAdapter<String> mArrayAdapter;
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//String[] values = new String[] { "a", "b", "c", "d", "e", "f", "g",
// "h", "i", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s",
// "t", "u", "w", "x", "y", "z" };
//CalEventRetreiver cal_event_retreiver = new CalEventRetreiver();
update_list();
getListView().setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
setListAdapter(mArrayAdapter);
}
void update_list() {
mEventListValueArray = (String[]) mEventsList.toArray(new String[0]);
mArrayAdapter = new ArrayAdapter<String>(getActivity(),
android.R.layout.simple_list_item_multiple_choice, mEventsList);
}
@Override
public void onListItemClick(ListView l, View v, int position, long id) {
// do something with the data
}
}
答案 0 :(得分：0)
尝试做类似的事情：
public static class SimpleListFragment extends ListFragment {
String[] numbers_text = new String[] { "one", "two", "three", "four",
"five", "six", "seven", "eight",
"nine", "ten", "eleven",
"twelve", "thirteen", "fourteen",
"fifteen" };
String[] numbers_digits = new String[] { "1", "2", "3", "4", "5", "6", "7",
"8", "9", "10", "11", "12", "13",
"14", "15" };
@Override
public void onListItemClick(ListView l, View v, int position, long id) {
new CustomToast(getActivity(), numbers_digits[(int) id]);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
ArrayAdapter<String> adapter = new ArrayAdapter<String>
(inflater.getContext(),
android.R.layout.simple_list_item_1,
numbers_text);
setListAdapter(adapter);
return super.onCreateView(inflater, container, savedInstanceState);
}
}