Java tutorial
/* This file is part of My Expenses. * My Expenses is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * My Expenses is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with My Expenses. If not, see <http://www.gnu.org/licenses/>. */ package org.totschnig.myexpenses.dialog; import static org.totschnig.myexpenses.provider.DatabaseConstants.KEY_ROWID; import java.text.DateFormat; import java.text.SimpleDateFormat; import java.util.Locale; import org.totschnig.myexpenses.MyApplication; import org.totschnig.myexpenses.R; import org.totschnig.myexpenses.activity.Export; import org.totschnig.myexpenses.util.Utils; import org.totschnig.myexpenses.model.Account; import org.totschnig.myexpenses.model.AggregateAccount; import org.totschnig.myexpenses.model.DataObjectNotFoundException; import org.totschnig.myexpenses.model.ContribFeature.Feature; import android.annotation.TargetApi; import android.app.Activity; import android.app.AlertDialog; import android.app.Dialog; import android.content.Context; import android.content.DialogInterface; import android.content.Intent; import android.os.Build; import android.os.Bundle; import android.support.v4.app.DialogFragment; import android.text.Editable; import android.text.TextWatcher; import android.view.LayoutInflater; import android.view.View; import android.widget.CheckBox; import android.widget.EditText; import android.widget.RadioButton; import android.widget.RadioGroup; import android.widget.TextView; import android.widget.Toast; public class ExportDialogFragment extends DialogFragment implements android.content.DialogInterface.OnClickListener, android.view.View.OnClickListener { CheckBox notYetExportedCB, deleteCB; RadioButton formatRB; TextView warningTV; EditText dateFormatET; AlertDialog mDialog; static final String PREFKEY_EXPORT_DATE_FORMAT = "export_date_format"; public static final ExportDialogFragment newInstance(Long accountId) { ExportDialogFragment dialogFragment = new ExportDialogFragment(); if (accountId != null) { Bundle bundle = new Bundle(); bundle.putLong("accountId", accountId); dialogFragment.setArguments(bundle); } return dialogFragment; } @TargetApi(Build.VERSION_CODES.HONEYCOMB) @Override public Dialog onCreateDialog(Bundle savedInstanceState) { Activity ctx = (Activity) getActivity(); Context wrappedCtx = DialogUtils.wrapContext1(ctx); Bundle args = getArguments(); Long accountId = args != null ? args.getLong("accountId") : null; boolean allP = false; String warningText; if (accountId == null) { allP = true; warningText = getString(R.string.warning_reset_account_all); } else if (accountId < 0L) { allP = true; AggregateAccount aa = AggregateAccount.getCachedInstance(accountId); if (aa == null) throw new DataObjectNotFoundException(accountId); warningText = getString(R.string.warning_reset_account_all, " (" + aa.currency.getCurrencyCode() + ")"); } else { warningText = getString(R.string.warning_reset_account); } LayoutInflater li = LayoutInflater.from(wrappedCtx); View view = li.inflate(R.layout.export_dialog, null); dateFormatET = (EditText) view.findViewById(R.id.date_format); String dateFormatDefault = ((SimpleDateFormat) DateFormat.getDateInstance(DateFormat.SHORT)).toPattern(); String dateFormat = MyApplication.getInstance().getSettings().getString(PREFKEY_EXPORT_DATE_FORMAT, ""); if (dateFormat.equals("")) dateFormat = dateFormatDefault; else { try { new SimpleDateFormat(dateFormat, Locale.US); } catch (IllegalArgumentException e) { dateFormat = dateFormatDefault; } } dateFormatET.setText(dateFormat); dateFormatET.addTextChangedListener(new TextWatcher() { public void afterTextChanged(Editable s) { try { new SimpleDateFormat(s.toString(), Locale.US); mDialog.getButton(AlertDialog.BUTTON_POSITIVE).setEnabled(true); } catch (IllegalArgumentException e) { dateFormatET.setError(getString(R.string.date_format_illegal)); mDialog.getButton(AlertDialog.BUTTON_POSITIVE).setEnabled(false); } } public void beforeTextChanged(CharSequence s, int start, int count, int after) { } public void onTextChanged(CharSequence s, int start, int before, int count) { } }); notYetExportedCB = (CheckBox) view.findViewById(R.id.export_not_yet_exported); deleteCB = (CheckBox) view.findViewById(R.id.export_delete); warningTV = (TextView) view.findViewById(R.id.warning_reset); formatRB = (RadioButton) view.findViewById(R.id.csv); String format = MyApplication.getInstance().getSettings().getString(MyApplication.PREFKEY_EXPORT_FORMAT, "QIF"); boolean deleteP = true; if (format.equals("CSV")) (formatRB).setChecked(true); deleteCB.setOnClickListener(this); if (Account.getHasExported(accountId)) { deleteP = false; deleteCB.setChecked(false); notYetExportedCB.setChecked(true); notYetExportedCB.setVisibility(View.VISIBLE); } warningTV.setText(warningText); if (deleteP) warningTV.setVisibility(View.VISIBLE); else warningTV.setVisibility(View.GONE); AlertDialog.Builder builder = new AlertDialog.Builder(wrappedCtx) .setTitle(allP ? R.string.menu_reset_all : R.string.menu_reset).setView(view) .setPositiveButton(android.R.string.ok, this).setNegativeButton(android.R.string.cancel, null); if (Build.VERSION.SDK_INT < 11) builder.setIcon(android.R.drawable.ic_dialog_alert); else builder.setIconAttribute(android.R.attr.alertDialogIcon); mDialog = builder.create(); return mDialog; } @Override public void onClick(DialogInterface dialog, int which) { Bundle args = getArguments(); Long accountId = args != null ? args.getLong("accountId") : null; Intent i; Activity ctx = getActivity(); AlertDialog dlg = (AlertDialog) dialog; String format = ((RadioGroup) dlg.findViewById(R.id.format)).getCheckedRadioButtonId() == R.id.csv ? "CSV" : "QIF"; String dateFormat = ((EditText) dlg.findViewById(R.id.date_format)).getText().toString(); MyApplication.getInstance().getSettings().edit().putString(MyApplication.PREFKEY_EXPORT_FORMAT, format) .putString(PREFKEY_EXPORT_DATE_FORMAT, dateFormat).commit(); boolean deleteP = ((CheckBox) dlg.findViewById(R.id.export_delete)).isChecked(); boolean notYetExportedP = ((CheckBox) dlg.findViewById(R.id.export_not_yet_exported)).isChecked(); if (Utils.isExternalStorageAvailable()) { if (accountId == null) Feature.RESET_ALL.recordUsage(); i = new Intent(ctx, Export.class).putExtra(KEY_ROWID, accountId).putExtra("format", format) .putExtra("deleteP", deleteP).putExtra("notYetExportedP", notYetExportedP) .putExtra("dateFormat", dateFormat); ctx.startActivityForResult(i, 0); } else { Toast.makeText(ctx, ctx.getString(R.string.external_storage_unavailable), Toast.LENGTH_LONG).show(); } } /* * if we are in the situation, where there are already exported transactions * we suggest to the user the default of again exporting without deleting * but if the user now changes to deleting, we enforce a complete export/reset * since a partial deletion of only transactions not yet exported would * lead to an inconsistent state */ @Override public void onClick(View view) { if (((CheckBox) view).isChecked()) { notYetExportedCB.setEnabled(false); notYetExportedCB.setChecked(false); warningTV.setVisibility(View.VISIBLE); } else { notYetExportedCB.setEnabled(true); notYetExportedCB.setChecked(true); warningTV.setVisibility(View.GONE); } } }