Java tutorial
/* * Copyright (c) 2015 Ha Duy Trung * * 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 io.github.hidroh.materialistic; import android.accounts.Account; import android.accounts.AccountManager; import android.annotation.SuppressLint; import android.annotation.TargetApi; import android.app.Activity; import android.app.PendingIntent; import android.content.ActivityNotFoundException; import android.content.Context; import android.content.DialogInterface; import android.content.Intent; import android.content.pm.PackageManager; import android.content.pm.ResolveInfo; import android.content.res.TypedArray; import android.graphics.Color; import android.graphics.Point; import android.net.ConnectivityManager; import android.net.NetworkInfo; import android.net.Uri; import android.os.Build; import android.os.Parcelable; import android.support.annotation.AttrRes; import android.support.annotation.DimenRes; import android.support.annotation.NonNull; import android.support.annotation.StyleRes; import android.support.customtabs.CustomTabsIntent; import android.support.customtabs.CustomTabsSession; import android.support.design.widget.AppBarLayout; import android.support.design.widget.CoordinatorLayout; import android.support.design.widget.FloatingActionButton; import android.support.v4.content.ContextCompat; import android.support.v4.content.LocalBroadcastManager; import android.support.v4.util.Pair; import android.support.v4.view.GravityCompat; import android.support.v7.view.ContextThemeWrapper; import android.text.Html; import android.text.Layout; import android.text.Spannable; import android.text.TextUtils; import android.text.format.DateUtils; import android.text.style.ClickableSpan; import android.view.Display; import android.view.LayoutInflater; import android.view.MotionEvent; import android.view.View; import android.view.Window; import android.view.WindowManager; import android.webkit.WebSettings; import android.widget.TextView; import android.widget.Toast; import java.util.ArrayList; import java.util.List; import io.github.hidroh.materialistic.annotation.PublicApi; import io.github.hidroh.materialistic.data.HackerNewsClient; import io.github.hidroh.materialistic.data.Item; import io.github.hidroh.materialistic.data.WebItem; import io.github.hidroh.materialistic.widget.PopupMenu; @SuppressWarnings("WeakerAccess") @PublicApi public class AppUtils { private static final String ABBR_YEAR = "y"; private static final String ABBR_WEEK = "w"; private static final String ABBR_DAY = "d"; private static final String ABBR_HOUR = "h"; private static final String ABBR_MINUTE = "m"; private static final String PLAY_STORE_URL = "market://details?id=" + BuildConfig.APPLICATION_ID; private static final String FORMAT_HTML_COLOR = "%06X"; public static final int HOT_THRESHOLD_HIGH = 300; public static final int HOT_THRESHOLD_NORMAL = 100; static final int HOT_THRESHOLD_LOW = 10; public static final int HOT_FACTOR = 3; private static final String HOST_ITEM = "item"; private static final String HOST_USER = "user"; public static void openWebUrlExternal(Context context, WebItem item, String url, CustomTabsSession session) { if (!hasConnection(context)) { context.startActivity( new Intent(context, OfflineWebActivity.class).putExtra(OfflineWebActivity.EXTRA_URL, url)); return; } Intent intent = createViewIntent(context, item, url, session); if (!HackerNewsClient.BASE_WEB_URL.contains(Uri.parse(url).getHost())) { if (intent.resolveActivity(context.getPackageManager()) != null) { context.startActivity(intent); } return; } List<ResolveInfo> activities = context.getPackageManager().queryIntentActivities(intent, PackageManager.MATCH_DEFAULT_ONLY); ArrayList<Intent> intents = new ArrayList<>(); for (ResolveInfo info : activities) { if (info.activityInfo.packageName.equalsIgnoreCase(context.getPackageName())) { continue; } intents.add(createViewIntent(context, item, url, session).setPackage(info.activityInfo.packageName)); } if (intents.isEmpty()) { return; } if (intents.size() == 1) { context.startActivity(intents.remove(0)); } else { context.startActivity(Intent.createChooser(intents.remove(0), context.getString(R.string.chooser_title)) .putExtra(Intent.EXTRA_INITIAL_INTENTS, intents.toArray(new Parcelable[intents.size()]))); } } public static void setTextWithLinks(TextView textView, CharSequence html) { textView.setText(html); // TODO https://code.google.com/p/android/issues/detail?id=191430 //noinspection Convert2Lambda textView.setOnTouchListener(new View.OnTouchListener() { @SuppressLint("ClickableViewAccessibility") @Override public boolean onTouch(View v, MotionEvent event) { int action = event.getAction(); if (action == MotionEvent.ACTION_UP || action == MotionEvent.ACTION_DOWN) { int x = (int) event.getX(); int y = (int) event.getY(); TextView widget = (TextView) v; x -= widget.getTotalPaddingLeft(); y -= widget.getTotalPaddingTop(); x += widget.getScrollX(); y += widget.getScrollY(); Layout layout = widget.getLayout(); int line = layout.getLineForVertical(y); int off = layout.getOffsetForHorizontal(line, x); ClickableSpan[] link = Spannable.Factory.getInstance().newSpannable(widget.getText()) .getSpans(off, off, ClickableSpan.class); if (link.length != 0) { if (action == MotionEvent.ACTION_UP) { link[0].onClick(widget); } return true; } } return false; } }); } public static CharSequence fromHtml(String htmlText) { return fromHtml(htmlText, false); } public static CharSequence fromHtml(String htmlText, boolean compact) { if (TextUtils.isEmpty(htmlText)) { return null; } CharSequence spanned; if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) { //noinspection InlinedApi spanned = Html.fromHtml(htmlText, compact ? Html.FROM_HTML_MODE_COMPACT : Html.FROM_HTML_MODE_LEGACY); } else { //noinspection deprecation spanned = Html.fromHtml(htmlText); } return trim(spanned); } public static Intent makeEmailIntent(String subject, String text) { final Intent intent = new Intent(Intent.ACTION_SENDTO); intent.setData(Uri.parse("mailto:")); intent.putExtra(Intent.EXTRA_SUBJECT, subject); intent.putExtra(Intent.EXTRA_TEXT, text); return intent; } public static void openExternal(@NonNull final Context context, @NonNull PopupMenu popupMenu, @NonNull View anchor, @NonNull final WebItem item, final CustomTabsSession session) { if (TextUtils.isEmpty(item.getUrl()) || item.getUrl().startsWith(HackerNewsClient.BASE_WEB_URL)) { openWebUrlExternal(context, item, String.format(HackerNewsClient.WEB_ITEM_PATH, item.getId()), session); return; } popupMenu.create(context, anchor, GravityCompat.END).inflate(R.menu.menu_share) .setOnMenuItemClickListener(menuItem -> { openWebUrlExternal(context, item, menuItem.getItemId() == R.id.menu_article ? item.getUrl() : String.format(HackerNewsClient.WEB_ITEM_PATH, item.getId()), session); return true; }).show(); } public static void share(@NonNull final Context context, @NonNull PopupMenu popupMenu, @NonNull View anchor, @NonNull final WebItem item) { if (TextUtils.isEmpty(item.getUrl()) || item.getUrl().startsWith(HackerNewsClient.BASE_WEB_URL)) { context.startActivity(makeChooserShareIntent(context, item.getDisplayedTitle(), String.format(HackerNewsClient.WEB_ITEM_PATH, item.getId()))); return; } popupMenu.create(context, anchor, GravityCompat.END).inflate(R.menu.menu_share) .setOnMenuItemClickListener(menuItem -> { context.startActivity(makeChooserShareIntent(context, item.getDisplayedTitle(), menuItem.getItemId() == R.id.menu_article ? item.getUrl() : String.format(HackerNewsClient.WEB_ITEM_PATH, item.getId()))); return true; }).show(); } public static int getThemedResId(Context context, @AttrRes int attr) { TypedArray a = context.getTheme().obtainStyledAttributes(new int[] { attr }); final int resId = a.getResourceId(0, 0); a.recycle(); return resId; } public static float getDimension(Context context, @StyleRes int styleResId, @AttrRes int attr) { TypedArray a = context.getTheme().obtainStyledAttributes(styleResId, new int[] { attr }); float size = a.getDimension(0, 0); a.recycle(); return size; } public static boolean isHackerNewsUrl(WebItem item) { return !TextUtils.isEmpty(item.getUrl()) && item.getUrl().equals(String.format(HackerNewsClient.WEB_ITEM_PATH, item.getId())); } public static int getDimensionInDp(Context context, @DimenRes int dimenResId) { return (int) (context.getResources().getDimension(dimenResId) / context.getResources().getDisplayMetrics().density); } public static void restart(Activity activity, boolean transition) { if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) { activity.recreate(); } else { activity.finish(); if (transition) { activity.overridePendingTransition(android.R.anim.fade_in, android.R.anim.fade_out); } activity.startActivity(activity.getIntent()); } } public static String getAbbreviatedTimeSpan(long timeMillis) { long span = Math.max(System.currentTimeMillis() - timeMillis, 0); if (span >= DateUtils.YEAR_IN_MILLIS) { return (span / DateUtils.YEAR_IN_MILLIS) + ABBR_YEAR; } if (span >= DateUtils.WEEK_IN_MILLIS) { return (span / DateUtils.WEEK_IN_MILLIS) + ABBR_WEEK; } if (span >= DateUtils.DAY_IN_MILLIS) { return (span / DateUtils.DAY_IN_MILLIS) + ABBR_DAY; } if (span >= DateUtils.HOUR_IN_MILLIS) { return (span / DateUtils.HOUR_IN_MILLIS) + ABBR_HOUR; } return (span / DateUtils.MINUTE_IN_MILLIS) + ABBR_MINUTE; } public static boolean isOnWiFi(Context context) { NetworkInfo activeNetwork = ((ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE)) .getActiveNetworkInfo(); return activeNetwork != null && activeNetwork.isConnectedOrConnecting() && activeNetwork.getType() == ConnectivityManager.TYPE_WIFI; } public static boolean hasConnection(Context context) { NetworkInfo activeNetworkInfo = ((ConnectivityManager) context .getSystemService(Context.CONNECTIVITY_SERVICE)).getActiveNetworkInfo(); return activeNetworkInfo != null && activeNetworkInfo.isConnectedOrConnecting(); } @SuppressLint("MissingPermission") public static Pair<String, String> getCredentials(Context context) { String username = Preferences.getUsername(context); if (TextUtils.isEmpty(username)) { return null; } AccountManager accountManager = AccountManager.get(context); Account[] accounts = accountManager.getAccountsByType(BuildConfig.APPLICATION_ID); for (Account account : accounts) { if (TextUtils.equals(username, account.name)) { return Pair.create(username, accountManager.getPassword(account)); } } return null; } /** * Displays UI to allow user to login * If no accounts exist in user's device, regardless of login status, prompt to login again * If 1 or more accounts in user's device, and already logged in, prompt to update password * If 1 or more accounts in user's device, and logged out, show account chooser * @param context activity context * @param alertDialogBuilder dialog builder */ @SuppressLint("MissingPermission") public static void showLogin(Context context, AlertDialogBuilder alertDialogBuilder) { Account[] accounts = AccountManager.get(context).getAccountsByType(BuildConfig.APPLICATION_ID); if (accounts.length == 0) { // no accounts, ask to login or re-login context.startActivity(new Intent(context, LoginActivity.class)); } else if (!TextUtils.isEmpty(Preferences.getUsername(context))) { // stale account, ask to re-login context.startActivity(new Intent(context, LoginActivity.class)); } else { // logged out, choose from existing accounts to log in showAccountChooser(context, alertDialogBuilder, accounts); } } @SuppressLint("MissingPermission") public static void registerAccountsUpdatedListener(final Context context) { AccountManager.get(context).addOnAccountsUpdatedListener(accounts -> { String username = Preferences.getUsername(context); if (TextUtils.isEmpty(username)) { return; } for (Account account : accounts) { if (TextUtils.equals(account.name, username)) { return; } } Preferences.setUsername(context, null); }, null, true); } @SuppressWarnings("deprecation") @TargetApi(Build.VERSION_CODES.LOLLIPOP) public static void openPlayStore(Context context) { Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(PLAY_STORE_URL)); intent.addFlags(Intent.FLAG_ACTIVITY_NO_HISTORY | Intent.FLAG_ACTIVITY_MULTIPLE_TASK); if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) { intent.addFlags(Intent.FLAG_ACTIVITY_NEW_DOCUMENT); } else { intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET); } try { context.startActivity(intent); } catch (ActivityNotFoundException e) { Toast.makeText(context, R.string.no_playstore, Toast.LENGTH_SHORT).show(); } } public static void showAccountChooser(final Context context, AlertDialogBuilder alertDialogBuilder, Account[] accounts) { String username = Preferences.getUsername(context); final String[] items = new String[accounts.length + 1]; int checked = -1; for (int i = 0; i < accounts.length; i++) { String accountName = accounts[i].name; items[i] = accountName; if (TextUtils.equals(accountName, username)) { checked = i; } } items[items.length - 1] = context.getString(R.string.add_account); //noinspection Convert2Lambda alertDialogBuilder.init(context).setTitle(R.string.choose_account) .setSingleChoiceItems(items, checked, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { if (which == items.length - 1) { Intent intent = new Intent(context, LoginActivity.class); intent.putExtra(LoginActivity.EXTRA_ADD_ACCOUNT, true); context.startActivity(intent); } else { Preferences.setUsername(context, items[which]); Toast.makeText(context, context.getString(R.string.welcome, items[which]), Toast.LENGTH_SHORT).show(); } dialog.dismiss(); } }).show(); } public static void toggleFab(FloatingActionButton fab, boolean visible) { CoordinatorLayout.LayoutParams p = (CoordinatorLayout.LayoutParams) fab.getLayoutParams(); if (visible) { fab.show(); p.setBehavior(new ScrollAwareFABBehavior()); } else { fab.hide(); p.setBehavior(null); } } public static void toggleFabAction(FloatingActionButton fab, WebItem item, boolean commentMode) { Context context = fab.getContext(); fab.setImageResource(commentMode ? R.drawable.ic_reply_white_24dp : R.drawable.ic_zoom_out_map_white_24dp); fab.setOnClickListener(v -> { if (commentMode) { context.startActivity(new Intent(context, ComposeActivity.class) .putExtra(ComposeActivity.EXTRA_PARENT_ID, item.getId()) .putExtra(ComposeActivity.EXTRA_PARENT_TEXT, item instanceof Item ? ((Item) item).getText() : null)); } else { LocalBroadcastManager.getInstance(context) .sendBroadcast(new Intent(BaseWebFragment.ACTION_FULLSCREEN) .putExtra(BaseWebFragment.EXTRA_FULLSCREEN, true)); } }); } public static String toHtmlColor(Context context, @AttrRes int colorAttr) { return String.format(FORMAT_HTML_COLOR, 0xFFFFFF & ContextCompat.getColor(context, AppUtils.getThemedResId(context, colorAttr))); } public static void toggleWebViewZoom(WebSettings webSettings, boolean enabled) { webSettings.setSupportZoom(enabled); webSettings.setBuiltInZoomControls(enabled); if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) { webSettings.setDisplayZoomControls(false); } } public static void setStatusBarDim(Window window, boolean dim) { setStatusBarColor(window, dim ? Color.TRANSPARENT : ContextCompat.getColor(window.getContext(), AppUtils.getThemedResId(window.getContext(), R.attr.colorPrimaryDark))); } public static void setStatusBarColor(Window window, int color) { if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) { window.setStatusBarColor(color); } } public static void navigate(int direction, AppBarLayout appBarLayout, Navigable navigable) { switch (direction) { case Navigable.DIRECTION_DOWN: case Navigable.DIRECTION_RIGHT: if (appBarLayout.getBottom() == 0) { navigable.onNavigate(direction); } else { appBarLayout.setExpanded(false, true); } break; default: navigable.onNavigate(direction); break; } } public static int getDisplayHeight(Context context) { Display display = ((WindowManager) context.getSystemService(Context.WINDOW_SERVICE)).getDefaultDisplay(); if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB_MR2) { Point point = new Point(); display.getSize(point); return point.y; } else { //noinspection deprecation return display.getHeight(); } } public static LayoutInflater createLayoutInflater(Context context) { return LayoutInflater .from(new ContextThemeWrapper(context, Preferences.Theme.resolvePreferredTextSize(context))); } public static Intent makeChooserShareIntent(Context context, String subject, String text) { Intent shareIntent = AppUtils.makeShareIntent(subject, text); Intent chooserIntent = Intent.createChooser(shareIntent, context.getString(R.string.share)); chooserIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); return chooserIntent; } public static Uri createItemUri(@NonNull String itemId) { return new Uri.Builder().scheme(BuildConfig.APPLICATION_ID).authority(HOST_ITEM).path(itemId).build(); } public static Uri createUserUri(@NonNull String userId) { return new Uri.Builder().scheme(BuildConfig.APPLICATION_ID).authority(HOST_USER).path(userId).build(); } public static String getDataUriId(@NonNull Intent intent, String altParamId) { if (intent.getData() == null) { return null; } if (TextUtils.equals(intent.getData().getScheme(), BuildConfig.APPLICATION_ID)) { return intent.getData().getLastPathSegment(); } else { // web URI return intent.getData().getQueryParameter(altParamId); } } public static String wrapHtml(Context context, String html) { return context.getString(R.string.html, Preferences.Theme.getReadabilityTypeface(context), toHtmlPx(context, Preferences.Theme.resolvePreferredReadabilityTextSize(context)), AppUtils.toHtmlColor(context, android.R.attr.textColorPrimary), AppUtils.toHtmlColor(context, android.R.attr.textColorLink), html, toHtmlPx(context, context.getResources().getDimension(R.dimen.activity_vertical_margin)), toHtmlPx(context, context.getResources().getDimension(R.dimen.activity_horizontal_margin)), Preferences.getReadabilityLineHeight(context)); } private static float toHtmlPx(Context context, @StyleRes int textStyleAttr) { return toHtmlPx(context, AppUtils.getDimension(context, textStyleAttr, R.attr.contentTextSize)); } private static float toHtmlPx(Context context, float dimen) { return dimen / context.getResources().getDisplayMetrics().density; } private static CharSequence trim(CharSequence charSequence) { if (TextUtils.isEmpty(charSequence)) { return charSequence; } int end = charSequence.length() - 1; while (Character.isWhitespace(charSequence.charAt(end))) { end--; } return charSequence.subSequence(0, end + 1); } private static Intent makeShareIntent(String subject, String text) { final Intent intent = new Intent(Intent.ACTION_SEND); intent.setType("text/plain"); intent.putExtra(Intent.EXTRA_SUBJECT, subject); intent.putExtra(Intent.EXTRA_TEXT, !TextUtils.isEmpty(subject) ? TextUtils.join(" - ", new String[] { subject, text }) : text); return intent; } @NonNull private static Intent createViewIntent(Context context, WebItem item, String url, CustomTabsSession session) { if (Preferences.customChromeTabEnabled(context)) { return new CustomTabsIntent.Builder(session) .setToolbarColor( ContextCompat.getColor(context, AppUtils.getThemedResId(context, R.attr.colorPrimary))) .setShowTitle(true).enableUrlBarHiding().addDefaultShareMenuItem() .addMenuItem(context.getString(R.string.comments), PendingIntent.getActivity(context, 0, new Intent(context, ItemActivity.class).putExtra(ItemActivity.EXTRA_ITEM, item) .putExtra(ItemActivity.EXTRA_OPEN_COMMENTS, true), PendingIntent.FLAG_ONE_SHOT)) .build().intent.setData(Uri.parse(url)); } else { return new Intent(Intent.ACTION_VIEW, Uri.parse(url)); } } @SuppressLint("InlinedApi") public static Intent multiWindowIntent(Activity activity, Intent intent) { if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N && activity.isInMultiWindowMode()) { intent.addFlags(Intent.FLAG_ACTIVITY_LAUNCH_ADJACENT | Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_MULTIPLE_TASK); } return intent; } static class SystemUiHelper { private final Window window; private final int originalUiFlags; private boolean enabled = true; SystemUiHelper(Window window) { this.window = window; if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) { this.originalUiFlags = window.getDecorView().getSystemUiVisibility(); } else { this.originalUiFlags = 0; } } @SuppressLint("InlinedApi") void setFullscreen(boolean fullscreen) { if (!enabled) { return; } if (Build.VERSION.SDK_INT < Build.VERSION_CODES.KITKAT) { return; } if (fullscreen) { window.getDecorView().setSystemUiVisibility(originalUiFlags | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY); } else { window.getDecorView().setSystemUiVisibility(originalUiFlags); } } void setEnabled(boolean enabled) { this.enabled = enabled; } } }