Java tutorial
/* * Geopaparazzi - Digital field mapping on Android based devices * Copyright (C) 2016 HydroloGIS (www.hydrologis.com) * * This program 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. * * This program 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 this program. If not, see <http://www.gnu.org/licenses/>. */ package eu.geopaparazzi.library.core.dialogs; import android.app.Activity; import android.app.AlertDialog; import android.app.Dialog; import android.content.DialogInterface; import android.os.Bundle; import android.support.v4.app.DialogFragment; import android.view.View; import android.widget.AdapterView; import android.widget.ArrayAdapter; import android.widget.CheckBox; import android.widget.CompoundButton; import android.widget.SeekBar; import android.widget.SeekBar.OnSeekBarChangeListener; import android.widget.Spinner; import android.widget.TextView; import java.util.List; import eu.geopaparazzi.library.R; import eu.geopaparazzi.library.style.LabelObject; /** * Class to label properties for a feature. * * @author Andrea Antonello */ public class LabelDialogFragment extends DialogFragment { /** * A simple interface to use to notify label properties changes. */ public interface ILabelPropertiesChangeListener { /** * Called when there is the need to notify that a change occurred. */ void onPropertiesChanged(LabelObject newLabelObject); } private final static String PREFS_KEY_LABELPROPERTIES = "PREFS_KEY_LABELPROPERTIES"; private LabelObject mCurrentLabelObject; private ILabelPropertiesChangeListener labelPropertiesChangeListener; private TextView mSizeTextView; /** * Create a dialog instance. * * @param labelObject object holding label info. * @return the instance. */ public static LabelDialogFragment newInstance(LabelObject labelObject) { LabelDialogFragment f = new LabelDialogFragment(); Bundle args = new Bundle(); args.putSerializable(PREFS_KEY_LABELPROPERTIES, labelObject); f.setArguments(args); return f; } @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); LabelObject mInitialLabelObject = (LabelObject) getArguments().getSerializable(PREFS_KEY_LABELPROPERTIES); if (mInitialLabelObject != null) { mCurrentLabelObject = mInitialLabelObject.duplicate(); } } @Override public Dialog onCreateDialog(Bundle bundle) { AlertDialog.Builder builder = new AlertDialog.Builder(getActivity()); View labelDialogView = getActivity().getLayoutInflater().inflate(R.layout.fragment_dialog_label, null); builder.setView(labelDialogView); CheckBox visibilityCheckBox = (CheckBox) labelDialogView.findViewById(R.id.checkVisibility); visibilityCheckBox.setChecked(mCurrentLabelObject.hasLabel); visibilityCheckBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() { @Override public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) { mCurrentLabelObject.hasLabel = isChecked; } }); mSizeTextView = (TextView) labelDialogView.findViewById(R.id.sizeTextView); mSizeTextView.setText(String.valueOf(mCurrentLabelObject.labelSize)); SeekBar mSizeSeekBar = (SeekBar) labelDialogView.findViewById(R.id.sizeSeekBar); mSizeSeekBar.setOnSeekBarChangeListener(sizeChanged); mSizeSeekBar.setProgress(mCurrentLabelObject.labelSize); List<String> labelFieldsList = mCurrentLabelObject.labelFieldsList; int index = 0; for (int i = 0; i < labelFieldsList.size(); i++) { if (labelFieldsList.get(i).equals(mCurrentLabelObject.label)) { index = i; break; } } final Spinner fieldsSpinner = (Spinner) labelDialogView.findViewById(R.id.labelFieldSpinner); ArrayAdapter<String> fieldsSpinnerAdapter = new ArrayAdapter<String>(getActivity(), android.R.layout.simple_spinner_item, labelFieldsList); fieldsSpinnerAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); fieldsSpinner.setAdapter(fieldsSpinnerAdapter); fieldsSpinner.setSelection(index); fieldsSpinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() { public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2, long arg3) { Object selectedItem = fieldsSpinner.getSelectedItem(); String fieldStr = selectedItem.toString(); mCurrentLabelObject.label = fieldStr; } public void onNothingSelected(AdapterView<?> arg0) { // ignore } }); builder.setPositiveButton(R.string.set_properties, new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int id) { if (labelPropertiesChangeListener != null) { labelPropertiesChangeListener.onPropertiesChanged(mCurrentLabelObject); } } }); builder.setNegativeButton(getString(android.R.string.cancel), new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int id) { } }); return builder.create(); // return dialog } @Override public void onAttach(Activity activity) { super.onAttach(activity); if (activity instanceof ILabelPropertiesChangeListener) { labelPropertiesChangeListener = (ILabelPropertiesChangeListener) activity; } } @Override public void onDetach() { super.onDetach(); labelPropertiesChangeListener = null; } private final OnSeekBarChangeListener sizeChanged = new OnSeekBarChangeListener() { @Override public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) { mCurrentLabelObject.labelSize = progress; mSizeTextView.setText(String.valueOf(progress)); } @Override public void onStartTrackingTouch(SeekBar seekBar) { } // required @Override public void onStopTrackingTouch(SeekBar seekBar) { } // required }; }