Java tutorial
/* * Copyright (C) 2008 The Android Open Source Project * * 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 com.stasbar.knowyourself.timer; import android.content.Context; import android.content.res.Resources; import android.graphics.Color; import android.support.v4.content.ContextCompat; import android.text.format.DateUtils; import android.util.AttributeSet; import android.view.KeyEvent; import android.view.LayoutInflater; import android.view.View; import android.widget.Button; import android.widget.ImageButton; import android.widget.LinearLayout; import com.stasbar.knowyourself.R; import com.stasbar.knowyourself.Utils; import com.stasbar.knowyourself.uidata.UiDataModel; import java.io.Serializable; import java.util.Arrays; public class TimerSetupView extends LinearLayout implements Button.OnClickListener, Button.OnLongClickListener { private final Button[] mNumbers = new Button[10]; private final int[] mInput = { 0, 0, 0, 0, 0, 0 }; private int mInputPointer = -1; private ImageButton mDelete; private TimerView mEnteredTime; private View mDivider; private final int mColorAccent; private final int mColorHairline; public TimerSetupView(Context context) { this(context, null /* attrs */); } public TimerSetupView(Context context, AttributeSet attrs) { super(context, attrs); mColorAccent = Utils.obtainStyledColor(context, R.attr.colorAccent, Color.RED); mColorHairline = ContextCompat.getColor(context, R.color.hairline); LayoutInflater.from(context).inflate(R.layout.time_setup_container, this); } @Override protected void onFinishInflate() { super.onFinishInflate(); final View v1 = findViewById(R.id.first); final View v2 = findViewById(R.id.second); final View v3 = findViewById(R.id.third); final View v4 = findViewById(R.id.fourth); mDivider = findViewById(R.id.divider); mDelete = (ImageButton) findViewById(R.id.delete); mDelete.setOnClickListener(this); mDelete.setOnLongClickListener(this); mEnteredTime = (TimerView) findViewById(R.id.timer_time_text); mNumbers[1] = (Button) v1.findViewById(R.id.key_left); mNumbers[2] = (Button) v1.findViewById(R.id.key_middle); mNumbers[3] = (Button) v1.findViewById(R.id.key_right); mNumbers[4] = (Button) v2.findViewById(R.id.key_left); mNumbers[5] = (Button) v2.findViewById(R.id.key_middle); mNumbers[6] = (Button) v2.findViewById(R.id.key_right); mNumbers[7] = (Button) v3.findViewById(R.id.key_left); mNumbers[8] = (Button) v3.findViewById(R.id.key_middle); mNumbers[9] = (Button) v3.findViewById(R.id.key_right); mNumbers[0] = (Button) v4.findViewById(R.id.key_middle); v4.findViewById(R.id.key_left).setVisibility(INVISIBLE); v4.findViewById(R.id.key_right).setVisibility(INVISIBLE); final UiDataModel uiDataModel = UiDataModel.getUiDataModel(); for (int i = 0; i < mNumbers.length; i++) { mNumbers[i].setOnClickListener(this); mNumbers[i].setText(uiDataModel.getFormattedNumber(i, 1)); //mNumbers[i].setTextColor(mColorPrimary); mNumbers[i].setTag(R.id.numbers_key, i); } updateTime(); updateDeleteButtonAndDivider(); } private boolean clickButton(View button) { button.performClick(); return true; } @Override public boolean onKeyDown(int keyCode, KeyEvent event) { switch (keyCode) { case KeyEvent.KEYCODE_0: return clickButton(mNumbers[0]); case KeyEvent.KEYCODE_1: return clickButton(mNumbers[1]); case KeyEvent.KEYCODE_2: return clickButton(mNumbers[2]); case KeyEvent.KEYCODE_3: return clickButton(mNumbers[3]); case KeyEvent.KEYCODE_4: return clickButton(mNumbers[4]); case KeyEvent.KEYCODE_5: return clickButton(mNumbers[5]); case KeyEvent.KEYCODE_6: return clickButton(mNumbers[6]); case KeyEvent.KEYCODE_7: return clickButton(mNumbers[7]); case KeyEvent.KEYCODE_8: return clickButton(mNumbers[8]); case KeyEvent.KEYCODE_9: return clickButton(mNumbers[9]); case KeyEvent.KEYCODE_DEL: return clickButton(mDelete); default: return false; } } @Override public void onClick(View v) { final boolean validInputBeforeClick = hasValidInput(); final Integer n = (Integer) v.getTag(R.id.numbers_key); // A number was pressed if (n != null) { // pressing "0" as the first digit does nothing if (mInputPointer == -1 && n == 0) { return; } // No space for more digits, so ignore input. if (mInputPointer == mInput.length - 1) { return; } // Append the new digit. System.arraycopy(mInput, 0, mInput, 1, mInputPointer + 1); mInput[0] = n; mInputPointer++; updateTime(); // Update talkback to read the number being deleted final Resources resources = getResources(); final String cd = resources.getString(R.string.timer_descriptive_delete, n.toString()); mDelete.setContentDescription(cd); } // other keys if (v == mDelete) { if (mInputPointer < 0) { // Nothing exists to delete so return. return; } System.arraycopy(mInput, 1, mInput, 0, mInputPointer); mInput[mInputPointer] = 0; mInputPointer--; updateTime(); // Update talkback to read the number being deleted or its original description. final String number = mInputPointer < 0 ? "" : Integer.toString(mInput[0]); final String cd = getResources().getString(R.string.timer_descriptive_delete, number); mDelete.setContentDescription(cd); } if (validInputBeforeClick != hasValidInput()) { updateDeleteButtonAndDivider(); } } @Override public boolean onLongClick(View v) { if (v == mDelete) { reset(); return true; } return false; } public void reset() { if (mInputPointer != -1) { Arrays.fill(mInput, 0); mInputPointer = -1; updateTime(); updateDeleteButtonAndDivider(); } } public long getTimeInMillis() { final int hoursInSeconds = mInput[5] * 36000 + mInput[4] * 3600; final int minutesInSeconds = mInput[3] * 600 + mInput[2] * 60; final int seconds = mInput[1] * 10 + mInput[0]; final int totalSeconds = hoursInSeconds + minutesInSeconds + seconds; return totalSeconds * DateUtils.SECOND_IN_MILLIS; } /** * @return an opaque representation of the state of timer setup */ public Serializable getState() { return Arrays.copyOf(mInput, mInput.length); } /** * @param state an opaque state of this view previously produced by {@link #getState()} */ public void setState(Serializable state) { final int[] input = (int[]) state; if (input != null && mInput.length == input.length) { for (int i = 0; i < mInput.length; i++) { mInput[i] = input[i]; if (mInput[i] != 0) { mInputPointer = i; } } updateTime(); updateDeleteButtonAndDivider(); } } protected boolean hasValidInput() { return mInputPointer != -1; } private void updateTime() { final int seconds = mInput[1] * 10 + mInput[0]; final int minutes = mInput[3] * 10 + mInput[2]; final int hours = mInput[5] * 10 + mInput[4]; mEnteredTime.setTime(mInput[5], mInput[4], mInput[3], mInput[2], seconds); mEnteredTime.setContentDescription(createContentDescription(hours, minutes, seconds)); } private void updateDeleteButtonAndDivider() { final boolean enabled = hasValidInput(); mDelete.setEnabled(enabled); mDivider.setBackgroundColor(enabled ? mColorAccent : mColorHairline); } private CharSequence createContentDescription(int hours, int minutes, int seconds) { final Resources r = getResources(); final String hoursFormatted = r.getQuantityString(R.plurals.Nhours_description, hours, hours); final String minutesFormatted = r.getQuantityString(R.plurals.Nminutes_description, minutes, minutes); final String secondsFormatted = r.getQuantityString(R.plurals.Nseconds_description, seconds, seconds); return (hours == 0 ? "" : hoursFormatted + ", ") + (minutes == 0 ? "" : minutesFormatted + ", ") + secondsFormatted; } }