Java tutorial
/* * Copyright 2016, 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.dmitrymalkovich.android.githubanalytics; import android.app.Activity; import android.app.ApplicationErrorReport; import android.content.Context; import android.content.Intent; import android.content.res.Resources; import android.graphics.drawable.Drawable; import android.net.ConnectivityManager; import android.net.NetworkInfo; import android.support.annotation.NonNull; import android.support.v4.app.Fragment; import android.support.v4.app.FragmentManager; import android.support.v4.app.FragmentTransaction; import com.dmitrymalkovich.android.githubanalytics.GitoApplication; import com.dmitrymalkovich.android.githubanalytics.R; import com.dmitrymalkovich.android.githubanalytics.data.source.local.GithubLocalDataSource; import com.dmitrymalkovich.android.githubanalytics.settings.SettingsActivity; import com.dmitrymalkovich.android.githubapi.core.time.TimeConverter; import java.io.IOException; import java.io.PrintWriter; import java.io.StringWriter; import java.text.DateFormat; import java.text.SimpleDateFormat; import java.util.Calendar; import java.util.Date; import java.util.GregorianCalendar; import java.util.Locale; /** * This provides methods to help Activities load their UI. */ public class Utils { /** * The {@code fragment} is added to the container view with id {@code frameId}. The operation is * performed by the {@code fragmentManager}. */ public static void addFragmentToActivity(@NonNull FragmentManager fragmentManager, @NonNull Fragment fragment, int frameId) { FragmentTransaction transaction = fragmentManager.beginTransaction(); transaction.add(frameId, fragment); transaction.commitAllowingStateLoss(); } public static void replaceFragment(@NonNull FragmentManager fragmentManager, @NonNull Fragment fragment, int frameId) { FragmentTransaction transaction = fragmentManager.beginTransaction(); transaction.replace(frameId, fragment); transaction.commitAllowingStateLoss(); } public static void openFeedback(Activity activity) { try { throw new IOException(); } catch (IOException e) { ApplicationErrorReport report = new ApplicationErrorReport(); report.packageName = report.processName = activity.getApplication().getPackageName(); report.time = System.currentTimeMillis(); report.type = ApplicationErrorReport.TYPE_CRASH; report.systemApp = false; ApplicationErrorReport.CrashInfo crash = new ApplicationErrorReport.CrashInfo(); crash.exceptionClassName = e.getClass().getSimpleName(); crash.exceptionMessage = e.getMessage(); StringWriter writer = new StringWriter(); PrintWriter printer = new PrintWriter(writer); e.printStackTrace(printer); crash.stackTrace = writer.toString(); StackTraceElement stack = e.getStackTrace()[0]; crash.throwClassName = stack.getClassName(); crash.throwFileName = stack.getFileName(); crash.throwLineNumber = stack.getLineNumber(); crash.throwMethodName = stack.getMethodName(); report.crashInfo = crash; Intent intent = new Intent(Intent.ACTION_APP_ERROR); intent.putExtra(Intent.EXTRA_BUG_REPORT, report); activity.startActivity(intent); } } public static boolean isNetworkAvailable() { Context context = GitoApplication.context(); ConnectivityManager connectivityManager = (ConnectivityManager) context .getSystemService(Context.CONNECTIVITY_SERVICE); NetworkInfo activeNetworkInfo = connectivityManager.getActiveNetworkInfo(); return activeNetworkInfo != null && activeNetworkInfo.isConnected(); } public static void openSettings(Activity activity) { Intent intent = new Intent(activity, SettingsActivity.class); activity.startActivity(intent); } @SuppressWarnings("deprecation") public static Drawable getColor(Context context, String language) { Resources resources = context.getResources(); if (language == null) { return resources.getDrawable(R.drawable.shape_oval_java); } switch (language) { case GithubLocalDataSource.TrendingLanguage.C: return resources.getDrawable(R.drawable.shape_oval_c); case GithubLocalDataSource.TrendingLanguage.RUBY: return resources.getDrawable(R.drawable.shape_oval_ruby); case GithubLocalDataSource.TrendingLanguage.JAVASCRIPT: return resources.getDrawable(R.drawable.shape_oval_javascript); case GithubLocalDataSource.TrendingLanguage.SWIFT: return resources.getDrawable(R.drawable.shape_oval_swift); case GithubLocalDataSource.TrendingLanguage.OBJECTIVE_C: return resources.getDrawable(R.drawable.shape_oval_objective_c); case GithubLocalDataSource.TrendingLanguage.C_PLUS_PLUS: return resources.getDrawable(R.drawable.shape_oval_c_plus); case GithubLocalDataSource.TrendingLanguage.PYTHON: return resources.getDrawable(R.drawable.shape_oval_python); case GithubLocalDataSource.TrendingLanguage.C_SHARP: return resources.getDrawable(R.drawable.shape_oval_c_sharp); case GithubLocalDataSource.TrendingLanguage.HTML: return resources.getDrawable(R.drawable.shape_oval_html); default: case GithubLocalDataSource.TrendingLanguage.JAVA: return resources.getDrawable(R.drawable.shape_oval_java); } } public static long today() { Calendar c = new GregorianCalendar(TimeConverter.getGitHubDefaultTimeZone()); int year = c.get(Calendar.YEAR); int month = c.get(Calendar.MONTH); int day = c.get(Calendar.DAY_OF_MONTH); Calendar calendar = Calendar.getInstance(); calendar.set(year, month, day, 0, 0, 0); return calendar.getTimeInMillis() / 1000 * 1000; } public static long yesterday() { Calendar c = new GregorianCalendar(TimeConverter.getGitHubDefaultTimeZone()); int year = c.get(Calendar.YEAR); int month = c.get(Calendar.MONTH); int day = c.get(Calendar.DAY_OF_MONTH); Calendar calendar = Calendar.getInstance(); calendar.set(year, month, day - 1, 0, 0, 0); return calendar.getTimeInMillis() / 1000 * 1000; } public static long twoWeeksAgo() { Calendar c = new GregorianCalendar(TimeConverter.getGitHubDefaultTimeZone()); int year = c.get(Calendar.YEAR); int month = c.get(Calendar.MONTH); int day = c.get(Calendar.DAY_OF_MONTH); Calendar calendar = Calendar.getInstance(); calendar.set(year, month, day - 14, 0, 0, 0); return calendar.getTimeInMillis() / 1000 * 1000; } public static long weekAgo() { Calendar c = new GregorianCalendar(TimeConverter.getGitHubDefaultTimeZone()); int year = c.get(Calendar.YEAR); int month = c.get(Calendar.MONTH); int day = c.get(Calendar.DAY_OF_MONTH); Calendar calendar = Calendar.getInstance(); calendar.set(year, month, day - 7, 0, 0, 0); return calendar.getTimeInMillis() / 1000 * 1000; } public static String humanReadable(long timestamp) { DateFormat dateFormat = new SimpleDateFormat("dd.MM", Locale.US); Date date = new Date(timestamp); return dateFormat.format(date); } }