Java tutorial
/*** Copyright (c) 2014 Selvin Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0. Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. */ package pl.selvin.android.listsyncsample.ui; import android.content.ContentValues; import android.content.Intent; import android.database.Cursor; import android.net.Uri; import android.os.Bundle; import android.provider.BaseColumns; import android.support.annotation.NonNull; import android.support.v4.app.LoaderManager; import android.support.v4.content.CursorLoader; import android.support.v4.content.Loader; import android.support.v4.widget.SimpleCursorAdapter; import android.support.v7.app.ActionBarActivity; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.view.View.OnClickListener; import android.widget.EditText; import android.widget.Spinner; import android.widget.TextView; import android.widget.Toast; import java.text.ParseException; import java.text.SimpleDateFormat; import java.util.Calendar; import java.util.UUID; import pl.selvin.android.listsyncsample.R; import pl.selvin.android.listsyncsample.app.DatePickerFragment; import pl.selvin.android.listsyncsample.app.TimePickerFragment; import pl.selvin.android.listsyncsample.provider.Database; import pl.selvin.android.listsyncsample.provider.Database.Item; import pl.selvin.android.listsyncsample.provider.ListProvider; import pl.selvin.android.listsyncsample.support.SyncHelper; public class EditItemActivity extends ActionBarActivity implements OnClickListener, LoaderManager.LoaderCallbacks<Cursor> { final static SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); final static SimpleDateFormat sdfdate = new SimpleDateFormat("yyyy-MM-dd"); final static SimpleDateFormat sdftime = new SimpleDateFormat("HH:mm"); final static String UserDataView = "view"; DatePickerFragment.OnDateSetListener dpdfListener = new DatePickerFragment.OnDateSetListener() { @Override public void setDate(Calendar calendar, Bundle userData) { final TextView tv = (TextView) findViewById(userData.getInt(UserDataView)); tv.setTag(calendar); tv.setText(sdfdate.format(calendar.getTime())); } }; TimePickerFragment.OnTimeSetListener tpdfListener = new TimePickerFragment.OnTimeSetListener() { @Override public void setTime(Calendar calendar, Bundle userData) { final TextView tv = (TextView) findViewById(userData.getInt(UserDataView)); tv.setTag(calendar); tv.setText(sdftime.format(calendar.getTime())); } }; final static String TimePickerFragmentTag = "TimePickerFragment"; final static String DatePickerFragmentTag = "DatePickerFragment"; private final static int PriorityLoaderId = 1; private final static int StatusLoaderId = 2; private final static int ItemLoaderId = 3; EditText edName, edDesc; TextView tStartDate, tStartTime, tEndDate, tEndTime; Spinner sPriority, sStatus; SimpleCursorAdapter adPriority, adStatus; Uri id = null; String listID = null; String UserID; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); try { UserID = SyncHelper.createInstance(this).getUserId(); } catch (Exception ex) { Toast.makeText(this, ex.getMessage(), Toast.LENGTH_LONG).show(); finish(); } setContentView(R.layout.edit_item_activity); getSupportActionBar().setDisplayHomeAsUpEnabled(true); edName = (EditText) findViewById(R.id.edName); edDesc = (EditText) findViewById(R.id.edDesc); sPriority = (Spinner) findViewById(R.id.sPriority); sStatus = (Spinner) findViewById(R.id.sStatus); tStartDate = (TextView) findViewById(R.id.tStartDate); tStartTime = (TextView) findViewById(R.id.tStartTime); tEndDate = (TextView) findViewById(R.id.tEndDate); tEndTime = (TextView) findViewById(R.id.tEndTime); tStartDate.setOnClickListener(this); tStartTime.setOnClickListener(this); tEndDate.setOnClickListener(this); tEndTime.setOnClickListener(this); adPriority = new SimpleCursorAdapter(this, R.layout.support_simple_spinner_dropdown_item, null, new String[] { Database.Priority.C_NAME }, new int[] { android.R.id.text1 }, 0); adPriority.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); sPriority.setAdapter(adPriority); adStatus = new SimpleCursorAdapter(this, R.layout.support_simple_spinner_dropdown_item, null, new String[] { Database.Status.NAME }, new int[] { android.R.id.text1 }, 0); adStatus.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); sStatus.setAdapter(adStatus); Intent intent = getIntent(); if (!Intent.ACTION_INSERT.endsWith(intent.getAction())) { id = intent.getData(); } else { listID = intent.getStringExtra(Item.LISTID); Calendar cal = Calendar.getInstance(); cal.set(Calendar.SECOND, 0); cal.set(Calendar.MILLISECOND, 0); tStartDate.setTag(cal); tStartDate.setText(sdfdate.format(cal.getTime())); tStartTime.setTag(cal); tStartTime.setText(sdftime.format(cal.getTime())); cal = Calendar.getInstance(); cal.set(Calendar.SECOND, 0); cal.set(Calendar.MILLISECOND, 0); cal.add(Calendar.DAY_OF_MONTH, 1); tEndDate.setTag(cal); tEndDate.setText(sdfdate.format(cal.getTime())); tEndTime.setTag(cal); tEndTime.setText(sdftime.format(cal.getTime())); } final DatePickerFragment dateFragment = (DatePickerFragment) getSupportFragmentManager() .findFragmentByTag(DatePickerFragmentTag); if (dateFragment != null) { dateFragment.setOnDateSetListener(dpdfListener); } final TimePickerFragment timeFragment = (TimePickerFragment) getSupportFragmentManager() .findFragmentByTag(TimePickerFragmentTag); if (timeFragment != null) { timeFragment.setOnTimeSetListener(tpdfListener); } getSupportLoaderManager().initLoader(PriorityLoaderId, null, this); } @Override public boolean onCreateOptionsMenu(Menu menu) { getMenuInflater().inflate(R.menu.save_cancel, menu); return super.onCreateOptionsMenu(menu); } @Override public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) { case android.R.id.home: case R.id.ui_edit_cancel: finish(); return true; case R.id.ui_edit_save: String name = edName.getText().toString(), desc = edDesc.getText().toString(); if (name.length() != 0 && desc.length() != 0) { ContentValues values = new ContentValues(); values.put(Database.Item.NAME, name); values.put(Database.Item.DESCRIPTION, desc); Cursor c = (Cursor) sPriority.getSelectedItem(); values.put(Database.Item.PRIORITY, c.getInt(c.getColumnIndex(BaseColumns._ID))); c = (Cursor) sStatus.getSelectedItem(); values.put(Database.Item.STATUS, c.getInt(c.getColumnIndex(BaseColumns._ID))); Calendar cal = (Calendar) tStartDate.getTag(); values.put(Database.Item.STARTDATE, sdf.format(cal.getTime())); cal = (Calendar) tEndDate.getTag(); values.put(Database.Item.ENDDATE, sdf.format(cal.getTime())); if (id == null) { values.put(Database.Item.ID, UUID.randomUUID().toString()); values.put(Database.Item.LISTID, listID); values.put(Database.Item.USERID, UserID); getContentResolver().insert(ListProvider.getHelper().getDirUri(Database.Item.TABLE_NAME), values); } else { getContentResolver().update(id, values, null, null); } finish(); } else { Toast.makeText(this, getResources().getString(R.string.ui_name_description_empty), Toast.LENGTH_SHORT).show(); } return true; default: return super.onOptionsItemSelected(item); } } @Override protected void onSaveInstanceState(Bundle outState) { super.onSaveInstanceState(outState); Calendar cal = (Calendar) tStartDate.getTag(); outState.putSerializable("StartDate", cal); cal = (Calendar) tEndDate.getTag(); outState.putSerializable("EndDate", cal); } @Override protected void onRestoreInstanceState(@NonNull Bundle savedInstanceState) { super.onRestoreInstanceState(savedInstanceState); Calendar cal = (Calendar) savedInstanceState.getSerializable("StartDate"); tStartDate.setTag(cal); tStartDate.setText(sdfdate.format(cal.getTime())); tStartTime.setTag(cal); tStartTime.setText(sdftime.format(cal.getTime())); cal = (Calendar) savedInstanceState.getSerializable("EndDate"); tEndDate.setTag(cal); tEndDate.setText(sdfdate.format(cal.getTime())); tEndTime.setTag(cal); tEndTime.setText(sdftime.format(cal.getTime())); } @Override public void onClick(final View v) { final int vId = v.getId(); final Bundle userData = new Bundle(); userData.putInt(UserDataView, vId); switch (vId) { case R.id.tStartDate: case R.id.tEndDate: final DatePickerFragment dateFragment = DatePickerFragment.newInstance((Calendar) v.getTag(), userData); dateFragment.setOnDateSetListener(dpdfListener); dateFragment.show(getSupportFragmentManager(), DatePickerFragmentTag); break; case R.id.tStartTime: case R.id.tEndTime: final TimePickerFragment timeFragment = TimePickerFragment.newInstance((Calendar) v.getTag(), userData); timeFragment.setOnTimeSetListener(tpdfListener); timeFragment.show(getSupportFragmentManager(), TimePickerFragmentTag); break; } } @Override public Loader<Cursor> onCreateLoader(int lid, Bundle args) { switch (lid) { case PriorityLoaderId: return new CursorLoader(this, ListProvider.getHelper().getDirUri(Database.Priority.TABLE_NAME), new String[] { BaseColumns._ID, Database.Priority.C_NAME }, null, null, null); case StatusLoaderId: return new CursorLoader(this, ListProvider.getHelper().getDirUri(Database.Status.TABLE_NAME), new String[] { BaseColumns._ID, Database.Status.NAME }, null, null, null); case ItemLoaderId: return new CursorLoader(this, id, new String[] { Database.Item.NAME, Database.Item.DESCRIPTION, Database.Item.PRIORITY, Database.Item.STATUS, Database.Item.STARTDATE, Database.Item.ENDDATE }, null, null, null); default: return null; } } @Override public void onLoadFinished(Loader<Cursor> cursorLoader, Cursor cursor) { final int lid = cursorLoader.getId(); switch (lid) { case PriorityLoaderId: adPriority.swapCursor(cursor); getSupportLoaderManager().initLoader(StatusLoaderId, null, this); return; case StatusLoaderId: adStatus.swapCursor(cursor); if (id != null) { getSupportLoaderManager().initLoader(ItemLoaderId, null, this); } return; case ItemLoaderId: if (cursor.moveToFirst()) { setTitle(R.string.ui_edit_item); edName.setText(cursor.getString(0)); edDesc.setText(cursor.getString(1)); SetupSpinner(cursor.getInt(2), sPriority); SetupSpinner(cursor.getInt(3), sStatus); String time = cursor.getString(4); Calendar cal = Calendar.getInstance(); try { cal.setTime(sdf.parse(time)); } catch (ParseException e) { e.printStackTrace(); } tStartDate.setTag(cal); tStartDate.setText(sdfdate.format(cal.getTime())); tStartTime.setTag(cal); tStartTime.setText(sdftime.format(cal.getTime())); time = cursor.getString(5); cal = Calendar.getInstance(); try { cal.setTime(sdf.parse(time)); } catch (ParseException e) { e.printStackTrace(); } tEndDate.setTag(cal); tEndDate.setText(sdfdate.format(cal.getTime())); tEndTime.setTag(cal); tEndTime.setText(sdftime.format(cal.getTime())); } else { finish(); } return; default: } } void SetupSpinner(final int sid, final Spinner spinner) { for (int i = 0; i < spinner.getCount(); i++) { Cursor value = (Cursor) spinner.getItemAtPosition(i); int id = value.getInt(value.getColumnIndex(BaseColumns._ID)); if (id == sid) { spinner.setSelection(i); break; } } } @Override public void onLoaderReset(Loader<Cursor> cursorLoader) { final int id = cursorLoader.getId(); switch (id) { case PriorityLoaderId: adPriority.swapCursor(null); return; case StatusLoaderId: adStatus.swapCursor(null); return; default: } } }