【发布时间】：2014-12-29 22:18:55
【问题描述】：
我在片段的列表视图中显示我的数据库。我还在对话框中添加了一个新数据。 当我在对话框中添加一些数据时，我在更新数据库时遇到了一点问题，当我返回在列表视图中显示我的数据库的片段时，我最近没有添加任何数据。当我关闭并重新打开我的应用程序时，数据会显示在列表视图中。
我想你明白我的问题了。
这是我的代码。
这是我的 MainActivity，它有一个按钮和一个片段。
public class MainActivity extends FragmentActivity implements
ActionBar.TabListener {
private ViewPager viewPager;
private TabsPagerAdapter mAdapter;
private ImageButton addBirthdate;
private DB database = new DB(this);
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Initilization
viewPager = (ViewPager) findViewById(R.id.pager);
mAdapter = new TabsPagerAdapter(getSupportFragmentManager());
viewPager.setAdapter(mAdapter);
addBirthdate = (ImageButton)findViewById(R.id.buttonAddBirthday);
addBirthdate.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
AddBirthdayDialog dialog = new AddBirthdayDialog(MainActivity.this);
dialog.show();
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
@Override
public void onTabSelected(ActionBar.Tab tab, FragmentTransaction ft) {
}
@Override
public void onTabUnselected(ActionBar.Tab tab, FragmentTransaction ft) {
}
@Override
public void onTabReselected(ActionBar.Tab tab, FragmentTransaction ft) {
}
}
这是我在列表视图中显示我的数据库的片段。
public class JanuaryFragment extends Fragment {
private DB myDB;
private List<Person> people;
private ListView listView;
private Context mContext;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.january_fragment, container, false);
mContext = getActivity();
myDB = new DB(mContext);
people = getThisMonthsPeople( myDB.getAllPeople());
listView = (ListView)rootView.findViewById(R.id.listViewOfBirthdays);
listView.setAdapter(new PersonAdapter(mContext, people));
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
EditBirthdayDialog dialog = new EditBirthdayDialog(mContext, people.get(position));
dialog.show();
}
});
return rootView;
}
public List<Person> getThisMonthsPeople(List<Person> allPeople){
List<Person> resultPeople = new LinkedList<Person>();
for(int i = 0; i< allPeople.size(); i++){
if(allPeople.get(i).getMonth()==1){
resultPeople.add(allPeople.get(i));
}
}
return resultPeople;
}
}
这是我添加新数据的对话框。
public class AddBirthdayDialog extends Dialog {
private Context context;
String name;
String sname;
private int day;
private int month;
private int year;
final EditText textName;
final EditText textSname;
final DatePicker birthDate;
private DB myDB;
private SQLiteDatabase database;
private Person person = new Person();
public AddBirthdayDialog(Context context) {
super(context);
this.context = context;
setCanceledOnTouchOutside(false);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.addbirthday_layout);
myDB = new DB(context);
textName = (EditText) findViewById(R.id.editTextname);
textSname = (EditText) findViewById(R.id.editTextsname);
birthDate = (DatePicker) findViewById(R.id.datePicker);
Button cancelButton = (Button) findViewById(R.id.cancelbutton);
cancelButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
clearForm();
dismiss();
}
});
Button save = (Button) findViewById(R.id.buttonadd);
save.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
name = textName.getText().toString();
sname = textSname.getText().toString();
day = birthDate.getDayOfMonth();
month = birthDate.getMonth()+1;
year = birthDate.getYear();
final String dayStr = String.valueOf(day);
final String monthStr = String.valueOf(month+1);
final String yearStr = String.valueOf(year);
person.setName(name);
person.setSname(sname);
person.setDay(day);
person.setMonth(month);
person.setYear(year);
person.setDateStr(dayStr + "/" + monthStr + "/" + yearStr);
myDB.addBirthday(person);
clearForm();
dismiss();
}
});
}
public void setDatePicker(int day, int month, int year){
birthDate.updateDate(day,month,year);
}
//Cleans the form
public void clearForm(){
textName.setText("");
textSname.setText("");
textSname.setText("");
}
}
这是我可以在列表视图中编辑数据的对话框。
public class EditBirthdayDialog extends Dialog {
private Context context;
String name;
String sname;
private int day;
private int month;
private int year;
final EditText textName;
final EditText textSname;
final DatePicker birthDate;
private DB myDB;
private SQLiteDatabase database;
private Person person;
public EditBirthdayDialog(Context context, final Person person) {
super(context);
this.context = context;
this.person = person;
setCanceledOnTouchOutside(false);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.editbirthday_layout);
myDB = new DB(context);
textName = (EditText) findViewById(R.id.editTextname);
textName.setText(person.getName());
textSname = (EditText) findViewById(R.id.editTextsname);
textSname.setText(person.getSname());
birthDate = (DatePicker) findViewById(R.id.datePicker);
birthDate.updateDate(person.getYear(),person.getMonth()-1,person.getDay());
Button cancelButton = (Button) findViewById(R.id.cancelbutton);
cancelButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
clearForm();
dismiss();
}
});
Button save = (Button) findViewById(R.id.buttonadd);
save.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
name = textName.getText().toString();
sname = textSname.getText().toString();
day = birthDate.getDayOfMonth();
month = birthDate.getMonth()+1;
year = birthDate.getYear();
final String dayStr = String.valueOf(day);
final String monthStr = String.valueOf(month);
final String yearStr = String.valueOf(year);
person.setName(name);
person.setSname(sname);
person.setDay(day);
person.setMonth(month);
person.setYear(year);
person.setDateStr(dayStr + "/" + monthStr + "/" + yearStr);
myDB.updateBirthday(person);
clearForm();
dismiss();
}
});
Button buttonDelete = (Button) findViewById(R.id.buttondelete);
buttonDelete.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
myDB.deleteBirthday(person);
clearForm();
dismiss();
}
});
}
public void setDatePicker(int day, int month, int year){
birthDate.updateDate(day,month,year);
}
//Cleans the form
public void clearForm(){
textName.setText("");
textSname.setText("");
}
}
已编辑。
提前谢谢你！
【问题讨论】：
-
对话框关闭时重新加载数据。您只是在数据库中添加数据，而不是刷新列表视图。
-
@Rohit5k2 但是我怎样才能重新加载:) 你能告诉我路吗？
-
请看我的回答。
标签： android sqlite android-fragments