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README_AboutMe.md

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357 lines (243 loc) · 8.87 KB

About Me

-- 00 delete Layout file

MainActivity.kt

9- setContentView(R.layout.activity_main)

-- 01 create Layout file

activity_main.xml

-- 02 Add a TextView, ImageView, and Styling

activity_main.xml

8+ <TextView 9+ android:id="@+id/textView" 10+ android:layout_width="match_parent" 11+ android:layout_height="wrap_content" 12+ android:text="Zdravko Šplajt" />

string.xml

3+ Zdravko Šplajt

activity_main.xml

12- android:text="Zdravko Šplajt" /> 12+ android:text="@string/name" />

12- android:text="@string/name" /> 12+ android:text="@string/name" 13+ android:textAlignment="center" />

dimens.xml

20sp 8dp 16dp

font/roboto.ttf

styles.xml

10+ <style name="NameStyle"> 11+ @dimen/layout_margin 12+ @font/roboto 13+ @dimen/small_padding 14+ @android:color/black 15+ @dimen/text_size 16+ </style>

activity_main.xml

13- android:textAlignment="center" /> 13+ android:textAlignment="center" 14+ style="@style/NameStyle" />

4+ xmlns:app="http://schemas.android.com/apk/res-auto" 16+ <ImageView 17+ android:id="@+id/star_image" 18+ android:layout_width="match_parent" 19+ android:layout_height="wrap_content" 20+ app:srcCompat="@android:drawable/btn_star_big_on" />

string.xml

4+ Yellow star

activity_main.xml

21+ android:contentDescription="@string/yellow_star"

21+ android:layout_marginTop="@dimen/layout_margin"

--03 Add a ScrollView

activity_main.xml

24+ 25+ <ScrollView 26+ android:layout_width="match_parent" 27+ android:layout_height="match_parent"> 28+ 29+

string.xml

5+ Hi, my name is Zdravko. 6+\n\nI love fish. 7+\n\nThe kind that is alive and swims around in an aquarium or river, or a lake, and definitely the ocean. 8+\nFun fact is that I have several aquariums and also a river. 9+\n\nI like eating fish, too. Raw fish. Grilled fish. Smoked fish. Poached fish - not so much. 10+\nAnd sometimes I even go fishing. 11+\nAnd even less sometimes, I actually catch something. 12+\n\nOnce, when I was camping in Canada, and very hungry, I even caught a large salmon with my hands. 13+\n\nI'll be happy to teach you how to make your own aquarium. 14+\nYou should ask someone else about fishing, though.\n\n 15+

activity_main.xml

29+ <TextView 30+ android:id="@+id/bio_text" 31+ android:layout_width="match_parent" 32+ android:layout_height="wrap_content" 33+ android:text="@string/bio" />

33- android:text="@string/bio" /> 33+ android:text="@string/bio" 34+ style="@style/NameStyle" />

dimens.xml

6+ 16dp

activity_main.xml

7- android:layout_height="match_parent"> 7+ android:layout_height="match_parent" 8+ android:paddingStart="@dimen/padding" 9+ android:paddingEnd="@dimen/padding">

-- 04 Add EditText, Done Button, ClickHandler

activity_main.xml

19+ <EditText 20+ android:id="@+id/nickname_edit" 21+ android:layout_width="match_parent" 22+ android:layout_height="wrap_content" 23+ android:ems="10" 24+ android:inputType="textPersonName" 25+ style="@style/NameStyle" />

string.xml

16+ What is your nickname

activity_main.xml

24+ android:hint="@string/what_is_your_nickname"

26+ android:textAlignment="center"

string.xml

17+ Done

activity_main.xml

29+ <Button 30+ android:id="@+id/done_button" 31+ android:layout_width="wrap_content" 32+ android:layout_height="wrap_content" 33+ android:text="@string/done" />

33- android:text="@string/done" /> 33+ android:layout_gravity="center_horizontal" 34+ android:layout_marginTop="@dimen/layout_margin" 35+ android:fontFamily="@font/roboto" 36+ android:text="@string/done" 37+ style="@style/Widget.AppCompat.Button.Colored" />

39+ <TextView 40+ android:id="@+id/nickname_text" 41+ android:layout_width="match_parent" 42+ android:layout_height="wrap_content" />

42- android:layout_height="wrap_content" /> 42+ android:layout_height="wrap_content" 43+ android:textAlignment="center" 44+ android:visibility="gone" 45+ style="@style/NameStyle" />

MainActivity.kt

9+ setContentView(R.layout.activity_main)

10+ 11+ findViewById(R.id.done_button).setOnClickListener { 12+ addNickname(it) 13+ }

5+import android.widget.Button

16+ 17+ private fun addNickname(view: View?) { 18+ 19+ }

5+import android.view.View

19 val editText = findViewById(R.id.nickname_edit) 20 val nicknameTextView = findViewById(R.id.nickname_text)

7+import android.widget.EditText 8+import android.widget.TextView

24+ nicknameTextView.text = editText.text 25+ editText.visibility = View.GONE 26+ view.visibility = View.GONE 27+ nicknameTextView.visibility = View.VISIBLE

28+ 29+ // Hide the keyboard. 30+ val imm = getSystemService(Context.INPUT_METHOD_SERVICE) as InputMethodManager 31+ imm.hideSoftInputFromWindow(view.windowToken, 0)

3+import android.content.Context 7+import android.view.inputmethod.InputMethodManager

28- view.visibility = View.GONE 28+ if (view != null) { 29+ view.visibility = View.GONE 30+ } 35- imm.hideSoftInputFromWindow(view.windowToken, 0) 35+ if (view != null) { 36+ imm.hideSoftInputFromWindow(view.windowToken, 0) 37+ }

-- 05 Implement Data Binding

app/build.gradle

24+ 25+ dataBinding { 26+ enabled = true 27+ }

  • update
    buildFeatures{ 
        dataBinding = true 
    }

activity_main.xml

2-<LinearLayout 2+<layout 5+ 6+<LinearLayout 69+

MainActivity.kt

13+ 14+ private lateinit var binding: ActivityMainBinding 15+

11+import com.example.android.aboutme.databinding.ActivityMainBinding

19- setContentView(R.layout.activity_main) 19+ binding = DataBindingUtil.setContentView(this, R.layout.activity_main)

11+import androidx.databinding.DataBindingUtil

22- findViewById

(R.id.done_button).setOnClickListener { 22+ binding.doneButton.setOnClickListener {

8-import android.widget.Button

MyName.kt

package com.example.android.aboutme

data class MyName(var name: String = "", var nickname: String = "")

activity_main.xml

6+ 7+ <variable 8+ name="myName" 9+ type="com.example.android.aboutme.MyName" /> 10+ 11+

23- android:text="@string/name" 23+ android:text="@={myName.name}" 51+ android:text="@={myName.nickname}" 31+ android:text="@={myName.nickname}"

46+ android:textAlignment="center" 32- android:ems="10" 66+ android:id="@+id/bio_scroll" 68- android:layout_height="match_parent"> 68+ android:layout_height="match_parent" 69+ android:layout_marginTop="@dimen/layout_margin"> 77- style="@style/NameStyle" /> 77+ android:textAppearance="@style/NameStyle" />

dimens.xml

7+ 1.2

activity_main.xml

77+ android:lineSpacingMultiplier="@dimen/line_spacing_multiplier"

MainActivity.kt

16+ private val myName: MyName = MyName("Zdravko Šplajt")

21+ binding.myName = myName

29- val editText = findViewById(R.id.nickname_edit) 30- val nicknameTextView = findViewById(R.id.nickname_text) 31- 32- nicknameTextView.text = editText.text 33- editText.visibility = View.GONE 34- if (view != null) { 35- view.visibility = View.GONE 36- } 37- nicknameTextView.visibility = View.VISIBLE 29+ binding.apply { 30+ myName?.nickname = nicknameEdit.text.toString() 31+ invalidateAll() 32+ nicknameEdit.visibility = View.GONE 33+ doneButton.visibility = View.GONE 34+ 35+ nicknameText.visibility = View.VISIBLE 36+ }

8-import android.widget.EditText 9-import android.widget.TextView