ankur49’s gists

alphamu / android - SquareLinearLayout

Created September 16, 2013 05:46

Android LinearLayout with the same height as width.

	import android.content.Context;
	import android.util.AttributeSet;
	import android.widget.LinearLayout;

	public class SquareLinearLayout extends LinearLayout {

	public SquareLinearLayout(Context context, AttributeSet attrs) {
	super(context, attrs);
	}

alphamu / Android - get views with tag

Created November 4, 2013 12:32

Android get all views with a tag

	public static ArrayList<View> getViewsByTag(ViewGroup root, String tag) {
	ArrayList<View> views = new ArrayList<View>();
	final int childCount = root.getChildCount();
	for (int i = 0; i < childCount; i++) {
	final View child = root.getChildAt(i);
	if (child instanceof ViewGroup) {
	views.addAll(getViewsByTag((ViewGroup) child, tag));
	}

	final Object tagObj = child.getTag();

alphamu / Android - DIP to PX or PX to DIP

Last active February 24, 2020 16:32

Android - DIP to PX or PX to DIP

	public static int dpToPx(Context context, int dp) {
	Resources r = context.getResources();
	float px = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, dp, r.getDisplayMetrics());
	return (int) px;
	}

	public static int pxToDp(Context context, int px) {
	final float scale = context.getResources().getDisplayMetrics().density;
	int dp = (int) (px * scale + 0.5f);
	return dp;

alphamu / Percentages expressed as HEX values

Last active May 4, 2019 12:52

Hexadecimal percentages from from 0 - 100 in increments of 5. These are particularly useful for alpha values in ARGB strings.

	100% — FF
	95% — F2
	90% — E6
	85% — D9
	80% — CC
	75% — BF
	70% — B3
	65% — A6
	60% — 99
	55% — 8C

alphamu / CalendarDayDifference.java

Last active May 4, 2019 12:50

Returns the difference between the provided date and now. The difference is in actual calendar days rather than time difference based. This means 01/Jan/2015 23:50 and 02/Jan/2015 00:01AM has a difference of 1 day.

	/**
	* Returns the difference between the provided date and now.
	* The difference is in actual calendar days rather than time difference based.
	* This means 01/Jan/2015 23:50 and 02/Jan/2015 00:01AM has a difference of 1 day.
	*
	* @param date The date from which the difference to today has to be calculated.
	* @return difference in calendar days.
	*/
	public static int getRealDayDifference(Date date) {
	String timeString = null;

alphamu / SharedPreferencesSingletonEnumKeyTemplate.java

Last active March 9, 2023 11:59

A SharedPreferences singleton that can be used to centralise and simplify reading and writing of SharedPerferences in your Android app. There are 2 versions, one that uses static String for Keys and an other that uses enums. Which one you use comes down to your preference, enums I feel provides better control when you have multiple programmers w…

	#if (${PACKAGE_NAME} != "")package ${PACKAGE_NAME};#end

	import android.content.Context;
	import android.content.SharedPreferences;

	/*
	* A Singleton for managing your SharedPreferences.
	*
	* You should make sure to change the SETTINGS_NAME to what you want
	* and choose the operating made that suits your needs, the default is

alphamu / AA Transition App theme between light and dark themes

Last active September 4, 2024 02:07

Example of how to change themes at runtime with a smooth animation. In this example, we just switch between a light and a dark theme. The activity animation is defined in the theme and as such will be default on all activities with the set theme. [Demo Video here](http://youtu.be/Ps0phswbHls).

	import android.content.Intent;
	import android.os.Bundle;
	import android.support.v7.app.AppCompatActivity;
	import android.view.View;
	import android.widget.ArrayAdapter;
	import android.widget.Button;
	import android.widget.ListView;


	public class TransitionThemeActivity extends AppCompatActivity implements View.OnClickListener {

alphamu / NetworkHelper.java

Last active October 15, 2021 06:42

Gist showing the use case of a headless Fragment to check if internet is available

	public class NetworkHelper extends Fragment {
	public static final String TAG = "NetworkHelper";
	public static final String CHECK_INTERNET = "network_connection";

	private Activity mActivity;
	AlertDialog mAlertDialog = null;

	private BroadcastReceiver onNotice = new BroadcastReceiver() {

	@Override

alphamu / TextDrawable.java

Last active May 7, 2023 16:24

An TextDrawable that can be used to draw a String. This can be used anywhere you would normally use a drawable. You can watch the demo video here: https://youtu.be/l1HgpcJhIi0

	/**
	* Copyright 2016 Ali Muzaffar
	* <p/>
	* 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
	* <p/>
	* http://www.apache.org/licenses/LICENSE-2.0
	* <p/>
	* Unless required by applicable law or agreed to in writing, software

alphamu / KeyStoreHelper.java

Last active December 28, 2023 18:22

Using Android KeyStore to generate a password. The code create a public/private key pair and uses the base64 encoded form of the certificate to as the password. The code modified the KeystoreHelper class from AOSP demo projects.

	/*
	* Copyright 2013 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