Import GingerCal 1.0 source
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package org.gingercal;
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import java.io.IOException;
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import java.net.ConnectException;
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import java.net.SocketTimeoutException;
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import java.net.URI;
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import java.net.UnknownHostException;
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import java.text.SimpleDateFormat;
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import java.util.Calendar;
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import java.util.Date;
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import java.util.Locale;
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import javax.net.ssl.SSLException;
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import android.app.Activity;
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import android.app.AlarmManager;
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import android.app.AlertDialog;
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import android.app.PendingIntent;
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import android.content.Context;
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import android.content.DialogInterface;
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import android.content.Intent;
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import android.content.SharedPreferences;
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import android.net.ConnectivityManager;
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import android.net.NetworkInfo;
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import android.widget.LinearLayout;
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import android.widget.TextView;
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import android.widget.Toast;
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import org.gingercal.Model.Ev;
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/** Shared helpers: settings, formatting, scheduling, dialogs. */
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public final class App {
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private App() {}
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public static final int[] INTERVALS = {0, 1, 3, 6, 12, 24};
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public static final int[] ALARMS = {-1, 0, 5, 10, 15, 30, 60, 120, 1440};
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public static SharedPreferences prefs(Context c) {
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return c.getSharedPreferences("gingercal", 0);
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}
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public static String get(Context c, String k) {
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return prefs(c).getString(k, "");
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}
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public static boolean configured(Context c) {
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return get(c, "url").length() > 0 && get(c, "user").length() > 0;
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}
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public static int interval(Context c) {
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return prefs(c).getInt("interval", 3);
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}
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public static int remind(Context c) {
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return prefs(c).getInt("remind", 15);
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}
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public static int ahead(Context c) {
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return prefs(c).getInt("ahead", 60);
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}
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public static Dav dav(Context c) throws Exception {
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return dav(get(c, "url"), get(c, "user"), get(c, "pass"), get(c, "pin"));
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}
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public static Dav dav(String url, String user, String pass, String pin) throws Exception {
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return new Dav(new ApacheHttp(pin, 30000), url, user, pass);
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}
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public static boolean online(Context c) {
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ConnectivityManager cm = (ConnectivityManager) c.getSystemService("connectivity");
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NetworkInfo ni = cm == null ? null : cm.getActiveNetworkInfo();
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return ni != null && ni.isConnected();
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}
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public static void requestSync(Context c, boolean manual, boolean force) {
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Intent i = new Intent(c, SyncService.class);
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i.putExtra("manual", manual);
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i.putExtra("force", force);
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c.startService(i);
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}
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/** (Re)arms the periodic background sync. */
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public static void scheduleSync(Context c) {
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AlarmManager am = (AlarmManager) c.getSystemService("alarm");
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Intent i = new Intent(c, AlarmReceiver.class);
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i.setAction(AlarmReceiver.SYNC);
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PendingIntent pi = PendingIntent.getBroadcast(c, 1, i, 0);
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am.cancel(pi);
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int h = interval(c);
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if (h > 0 && configured(c)) {
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long every = h * ICal.HOUR;
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am.setInexactRepeating(1 /* RTC: don't wake the phone just to sync */,
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System.currentTimeMillis() + every, every, pi);
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}
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}
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public static boolean isLan(String url) {
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try {
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String h = URI.create(Dav.normalize(url)).getHost();
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if (h == null) return false;
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h = h.toLowerCase(Locale.US);
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if (h.startsWith("10.") || h.startsWith("192.168.") || h.equals("localhost") || h.endsWith(".local")
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|| h.endsWith(".lan") || h.endsWith(".home.arpa")) return true;
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if (h.startsWith("172.")) {
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String[] p = h.split("\\.");
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int b = Integer.parseInt(p[1]);
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return b >= 16 && b <= 31;
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}
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if (h.startsWith("100.")) { // CGNAT / Tailscale-style ranges
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int b = Integer.parseInt(h.split("\\.")[1]);
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return b >= 64 && b <= 127;
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}
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} catch (RuntimeException ignored) {
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}
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return false;
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}
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// ------------------------------------------------------------ messages
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public static String describe(Throwable t) {
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if (t instanceof DavException || t instanceof DavException.UntrustedCert) return t.getMessage();
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if (t instanceof UnknownHostException) {
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return "Can't resolve " + t.getMessage() + ". No connection, or a typo in the server address.";
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}
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if (t instanceof ConnectException) return "Can't connect to the server (" + t.getMessage() + "). Wrong port, or the bridge is down?";
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if (t instanceof SocketTimeoutException) return "The server took too long to answer.";
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if (t instanceof SSLException) return "TLS error: " + t.getMessage();
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if (t instanceof IOException) return "Network error: " + t;
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if (t instanceof OutOfMemoryError) return "Out of memory. Lower 'Days ahead' in Settings.";
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return "Error: " + t;
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}
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public static void toast(Context c, String s) {
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Toast.makeText(c, s, 1).show();
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}
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public interface Trusted {
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void trusted(String fingerprint);
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}
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public static void askTrust(Activity a, final DavException.UntrustedCert u, final Trusted cb) {
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String msg = (u.pinMismatch
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? "WARNING: the server certificate changed since you trusted it. That happens when you "
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+ "regenerate the bridge certificate - or when someone is intercepting the connection.\n\n"
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: "This phone doesn't trust the server certificate (normal for the self-signed legacy bridge, "
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+ "or for Let's Encrypt on Android 2.3).\n\n")
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+ "Subject: " + u.subject + "\nIssuer: " + u.issuer + "\nExpires: " + u.expires
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+ "\n\nSHA-256:\n" + u.fingerprint
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+ "\n\nOnly trust it if this matches the fingerprint printed on your server.";
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new AlertDialog.Builder(a)
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.setTitle(u.pinMismatch ? "Certificate changed!" : "Trust this certificate?")
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.setMessage(msg)
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.setPositiveButton("Trust", new DialogInterface.OnClickListener() {
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public void onClick(DialogInterface d, int w) {
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cb.trusted(u.fingerprint);
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}
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})
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.setNegativeButton("Cancel", null)
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.show();
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}
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// ------------------------------------------------------------ formatting
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public static String time(Context c, long t) {
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String p = android.text.format.DateFormat.is24HourFormat(c) ? "HH:mm" : "h:mma";
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return new SimpleDateFormat(p, Locale.getDefault()).format(new Date(t));
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}
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public static String day(long t) {
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boolean thisYear = year(t) == year(System.currentTimeMillis());
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return new SimpleDateFormat(thisYear ? "EEE d MMM" : "EEE d MMM yyyy", Locale.getDefault()).format(new Date(t));
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}
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static int year(long t) {
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Calendar c = Calendar.getInstance();
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c.setTimeInMillis(t);
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return c.get(Calendar.YEAR);
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}
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public static String dayHeader(long dayStart) {
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long today = ICal.startOfDay(System.currentTimeMillis());
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if (dayStart == today) return "Today · " + day(dayStart);
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if (dayStart == ICal.addDays(today, 1)) return "Tomorrow · " + day(dayStart);
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return day(dayStart);
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}
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public static String when(Context c, Ev e) {
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if (e.allDay) {
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long lastDay = ICal.addDays(e.end, -1);
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if (lastDay <= e.start) return "All day";
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return "All day, until " + day(lastDay);
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}
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String s = time(c, e.start);
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if (e.end <= e.start) return s;
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if (ICal.startOfDay(e.end - 1) != ICal.startOfDay(e.start)) {
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return s + " – " + day(e.end) + " " + time(c, e.end);
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}
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return s + " – " + time(c, e.end);
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}
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public static String alarmLabel(int m) {
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if (m < 0) return "No reminder";
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if (m == 0) return "At start time";
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if (m < 60) return m + " min before";
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if (m < 1440) return (m / 60) + " h before";
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return (m / 1440) + " day before";
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}
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// --------------------------------------------------------------- views
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public static int dp(Context c, float v) {
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return (int) (v * c.getResources().getDisplayMetrics().density + 0.5f);
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}
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public static TextView text(Context c, String s, float sp, int color) {
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TextView t = new TextView(c);
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t.setText(s);
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t.setTextSize(sp);
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t.setTextColor(color);
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return t;
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}
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public static LinearLayout vbox(Context c) {
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LinearLayout l = new LinearLayout(c);
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l.setOrientation(LinearLayout.VERTICAL);
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return l;
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}
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public static int sysDrawable(Context c, String name) {
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return c.getResources().getIdentifier(name, "drawable", "android");
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}
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}
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