dzungvu

#create ssh key with specified location and name
ssh-keygen -t ed25519 -f ~/.ssh/key_name -C "name@example.com"

eval "$(ssh-agent -s)"

open ~/.ssh/config

#in case config file does not exist
touch ~/.ssh/config

dzungvu

afterEvaluate {
    if (project.hasProperty("android.injected.signing.store.file")) {
        println "key store path: ${project.property("android.injected.signing.store.file")}"
    }
    if (project.hasProperty("android.injected.signing.store.password")) {
        println "key store password: ${project.property("android.injected.signing.store.password")}"
    }
    if (project.hasProperty("android.injected.signing.key.alias")) {
        println "key alias: ${project.property("android.injected.signing.key.alias")}"
    }

dzungvu

//delegate
class DistanceCalculator() {
    fun calculate(vihecle: Vihecle, time: Float): Float {
        return vihecle.speed * time
    }
}

abstract class Vihecle(open val speed: Float, val model: String) {
    //use the delegate instead of override travel function in each subclass
    val distanceCalculator = DistanceCalculator()

dzungvu

private fun onShare() {
        val sendIntent: Intent = Intent().apply {
            action = Intent.ACTION_SEND
            type = "text/plain"
            putExtra(Intent.EXTRA_TEXT, "Share default content")
        }
        val textEmail = "Share content use for email"
        val textSMS = "Share content use for sms"
        val textOther = "Share content for other app"

dzungvu

Hexadecimal color code for transparency

How to set transparency with hex value ?

For example, you want to set 40% alpha transparence to #000000 (black color), you need to add 66 like this #66000000.

Download This sample on Google Play Store

dzungvu

#!/bin/bash
jarsigner -verbose -sigalg SHA256withRSA -digestalg SHA-256 -storepass abcdxyzt1234 -keystore my-key.keystore app-release.aab alias_name

dzungvu

cmd /c "jarsigner -verbose -sigalg SHA256withRSA -digestalg SHA-256 -storepass abcdxyzt1234 -keystore my-key.keystore app-release.aab alias_name"

dzungvu

signingConfigs {
       release {
           keyAlias keystoreProperties['keyAlias']
           keyPassword keystoreProperties['keyPassword']
           storeFile keystoreProperties['storeFile'] ? file(keystoreProperties['storeFile']) : null
           storePassword keystoreProperties['storePassword']
       }
   }

    buildTypes {

dzungvu

ex: adb shell input keyevent 22

usage: input [text|keyevent]
  input text <string>
  input keyevent <event_code>
  
  0 -->  "KEYCODE_UNKNOWN" 
1 -->  "KEYCODE_MENU" 
2 -->  "KEYCODE_SOFT_RIGHT" 
3 -->  "KEYCODE_HOME" 

dzungvu

package com.dzungvu.viewtopdf

import android.graphics.Bitmap
import android.graphics.Canvas
import android.graphics.Color
import android.graphics.Paint
import android.os.Bundle
import android.os.Environment
import android.view.View
import android.widget.Button