Java tutorial
/* * Copyright 2012 Dan Padgett * * 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 org.dpadgett.timer; import org.dpadgett.widget.CountdownTextView; import org.dpadgett.widget.FasterNumberPicker; import org.dpadgett.widget.FasterNumberPicker.OnValueChangeListener; import android.app.AlarmManager; import android.app.PendingIntent; import android.content.Context; import android.content.Intent; import android.content.SharedPreferences; import android.graphics.Bitmap; import android.graphics.Canvas; import android.os.Bundle; import android.os.Handler; import android.os.SystemClock; import android.support.v4.app.Fragment; import android.view.LayoutInflater; import android.view.View; import android.view.View.MeasureSpec; import android.view.View.OnClickListener; import android.view.ViewGroup; import android.widget.Button; import android.widget.EditText; import android.widget.LinearLayout; import android.widget.Spinner; /** * Fragment which handles the UI and logic for the countdown timer. * * @author dpadgett */ public class CountdownFragment extends Fragment { private boolean inputMode; private LinearLayout inputLayout; private LinearLayout timerLayout; private View rootView; private final Handler handler; private FasterNumberPicker countdownHours; private FasterNumberPicker countdownMinutes; private FasterNumberPicker countdownSeconds; private CountdownState timingState; public PendingIntent alarmPendingIntent; private AlarmSelector alarmSelector; public CountdownFragment() { this.inputMode = true; this.handler = new Handler(); } public Context getContext() { return rootView.getContext(); } @Override public View onCreateView(final LayoutInflater inflater, final ViewGroup container, final Bundle savedInstanceState) { // Inflate the layout for this fragment rootView = inflater.inflate(R.layout.countdown_simplified, container, false); this.inputLayout = (LinearLayout) rootView.findViewById(R.id.inputsInnerLayout); final Button startButton = (Button) rootView.findViewById(R.id.startButton); final FasterNumberPicker.Formatter twoDigitFormatter = new FasterNumberPicker.Formatter() { @Override public String format(final int value) { return String.format("%02d", value); } }; final FasterNumberPicker.OnValueChangeListener saveTimestampListener = new OnValueChangeListener() { @Override public void onValueChange(final FasterNumberPicker picker, final int oldVal, final int newVal) { final SharedPreferences.Editor prefs = getContext() .getSharedPreferences("Countdown", Context.MODE_PRIVATE).edit(); prefs.putLong("countdownInputs", getInputTimestamp()); prefs.commit(); } }; countdownHours = (FasterNumberPicker) rootView.findViewById(R.id.countdownHours); countdownHours.setMinValue(0); countdownHours.setMaxValue(99); countdownHours.setFormatter(twoDigitFormatter); // I will burn in hell for this View view = countdownHours.findViewById(org.dpadgett.compat.R.id.numberpicker_input); if (view != null) { final EditText inputText = (EditText) view; inputText.setFocusable(false); } countdownHours.setDisableInputText(true); countdownHours.setOnValueChangedListener(saveTimestampListener); countdownMinutes = (FasterNumberPicker) rootView.findViewById(R.id.countdownMinutes); countdownMinutes.setMinValue(0); countdownMinutes.setMaxValue(59); countdownMinutes.setFormatter(twoDigitFormatter); view = countdownMinutes.findViewById(org.dpadgett.compat.R.id.numberpicker_input); if (view != null) { final EditText inputText = (EditText) view; inputText.setFocusable(false); } countdownMinutes.setDisableInputText(true); countdownMinutes.setOnValueChangedListener(saveTimestampListener); countdownSeconds = (FasterNumberPicker) rootView.findViewById(R.id.countdownSeconds); countdownSeconds.setMinValue(0); countdownSeconds.setMaxValue(59); countdownSeconds.setFormatter(twoDigitFormatter); view = countdownSeconds.findViewById(org.dpadgett.compat.R.id.numberpicker_input); if (view != null) { final EditText inputText = (EditText) view; inputText.setFocusable(false); } countdownSeconds.setDisableInputText(true); countdownSeconds.setOnValueChangedListener(saveTimestampListener); this.alarmSelector = new AlarmSelector((Spinner) rootView.findViewById(R.id.alarm_tones)); this.timerLayout = (LinearLayout) inflater.inflate(R.layout.countdown_timer, container, false); startButton.setOnClickListener(new OnClickListener() { @Override public void onClick(final View v) { if (inputMode) { inputModeOff(); } else { inputModeOn(); } } }); restoreState(); // forcefully pre-render content so it is cached rootView.measure(MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED), MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED)); handler.postDelayed(new Runnable() { @Override public void run() { rootView.layout(0, 0, rootView.getMeasuredWidth(), rootView.getMeasuredHeight()); rootView.draw(new Canvas(Bitmap.createBitmap(rootView.getMeasuredWidth(), rootView.getMeasuredHeight(), Bitmap.Config.ARGB_8888))); } }, 1000); return rootView; } private void restoreState() { final SharedPreferences prefs = getContext().getSharedPreferences("Countdown", Context.MODE_PRIVATE); timingState = new CountdownState((CountdownTextView) timerLayout.findViewById(R.id.countdownTimer), prefs); if (prefs.contains("countdownInputs")) { long countdownInputs = prefs.getLong("countdownInputs", 0L); countdownInputs /= 1000; countdownSeconds.setValue((int) (countdownInputs % 60)); countdownInputs /= 60; countdownMinutes.setValue((int) (countdownInputs % 60)); countdownInputs /= 60; countdownHours.setValue((int) (countdownInputs % 100)); inputMode = !timingState.isRunning(); if (!inputMode) { // countdown view final LinearLayout inputs = (LinearLayout) rootView.findViewById(R.id.inputsLayout); final Button startButton = (Button) rootView.findViewById(R.id.startButton); inputs.removeAllViews(); inputs.addView(timerLayout); startButton.setText(getContext().getString(R.string.countdown_button_cancel)); // timing thread will auto start itself } } alarmSelector.restoreState(); } @Override public void onPause() { super.onPause(); saveState(); handler.removeCallbacks(inputModeOff); } @Override public void onResume() { super.onResume(); if (rootView != null) { restoreState(); } } @Override public void onSaveInstanceState(final Bundle saveState) { super.onSaveInstanceState(saveState); if (rootView != null) { saveState(); } } private void saveState() { final SharedPreferences.Editor prefs = getContext().getSharedPreferences("Countdown", Context.MODE_PRIVATE) .edit(); timingState.onSaveState(prefs); prefs.putLong("countdownInputs", getInputTimestamp()); prefs.commit(); } @Override public void onDestroy() { super.onDestroy(); timingState.stopTimer(); handler.removeCallbacks(inputModeOff); alarmSelector.destroy(); } public void inputModeOff() { handler.post(inputModeOff); } public void inputModeOn() { handler.post(inputModeOn); } private final Runnable inputModeOff = new Runnable() { @Override public void run() { if (rootView == null) { return; } final SharedPreferences prefs = getContext().getSharedPreferences("TimerActivity", Context.MODE_PRIVATE); if (prefs.getBoolean("countdownDialogShowing", false)) { return; } inputMode = false; final LinearLayout inputs = (LinearLayout) rootView.findViewById(R.id.inputsLayout); final Button startButton = (Button) rootView.findViewById(R.id.startButton); timingState.startTimer(getInputTimestamp()); inputs.removeAllViews(); inputs.addView(timerLayout); startButton.setText(getContext().getString(R.string.countdown_button_cancel)); final AlarmManager alarmMgr = (AlarmManager) getContext().getSystemService(Context.ALARM_SERVICE); // should be unique final Intent intent = new Intent(getContext(), AlarmService.class).putExtra("startAlarm", true) .setAction("startAlarmAt" + (timingState.endTime)); alarmPendingIntent = PendingIntent.getService(getContext(), 0, intent, PendingIntent.FLAG_ONE_SHOT); alarmMgr.set(AlarmManager.ELAPSED_REALTIME_WAKEUP, SystemClock.elapsedRealtime() + getInputTimestamp(), alarmPendingIntent); saveState(); } }; private final Runnable inputModeOn = new Runnable() { @Override public void run() { if (rootView == null) { return; } inputMode = true; final LinearLayout inputs = (LinearLayout) rootView.findViewById(R.id.inputsLayout); final Button startButton = (Button) rootView.findViewById(R.id.startButton); //TODO: fixme handler.removeCallbacks(inputModeOff); handler.removeCallbacks(inputModeOn); inputs.removeAllViews(); inputs.addView(inputLayout); startButton.setText(getContext().getString(R.string.countdown_button_start)); timingState.stopTimer(); if (alarmPendingIntent == null) { // should be unique final Intent intent = new Intent(getContext(), AlarmService.class).putExtra("startAlarm", true) .setAction("startAlarmAt" + (timingState.endTime)); alarmPendingIntent = PendingIntent.getService(getContext(), 0, intent, PendingIntent.FLAG_ONE_SHOT); } final AlarmManager alarmMgr = (AlarmManager) getContext().getSystemService(Context.ALARM_SERVICE); alarmMgr.cancel(alarmPendingIntent); alarmPendingIntent = null; saveState(); } }; private long getInputTimestamp() { return 1000L * (countdownHours.getValue() * 60 * 60 + countdownMinutes.getValue() * 60 + countdownSeconds.getValue()); } }