Share Your Data Android Programming

....................................................................................................................................................................................................................................

Linear Layout

Linear Layout
. Arrange view linearly - Horizontally or vertically

. android : orientations attribute to define the direction

Button
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:text="button 2"

        />

android:background='@color/colorAccent'

Example #

<Button
android:layout_width ="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"  // remain space
android:text="Button 1"
/>
<Button
android:layout_width ="wrap_content"
android:layout_height="wrap_content"
android:text="Button 1"
/>

Example #

<Button
android:layout_width ="wrap_content"
or below one performance purpose
//android:layout_width ="0dp"

android:layout_height="wrap_content"
android:layout_weight="70"  // remain space
android:text="Button 1"
/>

<Button
android:layout_width ="wrap_content"
or below one performance purpose
//android:layout_width ="0dp"

android:layout_height="wrap_content"
android:layout_weight="30"  // remain space
android:text="Button 1"

/>

Example # Relative Layout

Example #

Example #



Step 1

Java class


package com.share;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;

public class SaharedataActivity extends Activity {
 
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
    }  
     
            public void shareData(View view) {
            Intent intent = new Intent(Intent.ACTION_SEND);
            intent.setType("text/plain");
            intent.putExtra(Intent.EXTRA_TEXT, "This is my shared text");
            startActivity(Intent.createChooser(intent, "Share this text via"));
        }
    }


........................................................................................................................

Step -2
main.xml


<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:background="#C0C0C0"
    android:orientation="vertical" >
 
    <Button
        android:id="@+id/button2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Share Data"
        android:onClick="shareData"
        />
</LinearLayout>

out put

ConstraintLayout

ConstraintLayout is a layout on Android that gives you adaptable and flexible ways to create views for your apps.

<ImageView
  android:id="@+id/spaceStationIcon"
  android:layout_width="30dp"
  android:layout_height="30dp"
  android:layout_marginTop="15dp"
  android:src="@drawable/space_station_icon"
  app:layout_constraintTop_toTopOf="parent" />

<ImageView
  android:id="@+id/spaceStationIcon"
  android:layout_width="30dp"
  android:layout_height="30dp"
  android:layout_marginTop="15dp"
  android:src="@drawable/space_station_icon"
  app:layout_constraintEnd_toStartOf="@+id/flightsIcon"
  app:layout_constraintHorizontal_chainStyle="spread"
  app:layout_constraintStart_toStartOf="parent"
  app:layout_constraintTop_toTopOf="parent" />

<ImageView
  android:id="@+id/flightsIcon"
  android:layout_width="30dp"
  android:layout_height="30dp"
  android:src="@drawable/rocket_icon"
  app:layout_constraintBottom_toBottomOf="@+id/spaceStationIcon"
  app:layout_constraintEnd_toStartOf="@+id/roverIcon"
  app:layout_constraintStart_toEndOf="@+id/spaceStationIcon"
  app:layout_constraintTop_toTopOf="@+id/spaceStationIcon" />

<ImageView
  android:id="@+id/roverIcon"
  android:layout_width="30dp"
  android:layout_height="30dp"
  android:src="@drawable/rover_icon"
  app:layout_constraintBottom_toBottomOf="@+id/flightsIcon"
  app:layout_constraintEnd_toEndOf="parent"
  app:layout_constraintStart_toEndOf="@+id/flightsIcon"
  app:layout_constraintTop_toTopOf="@+id/flightsIcon" />

<TextView
  android:id="@+id/roverLabel"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:layout_marginTop="15dp"
  android:text="@string/rovers"
  app:layout_constraintEnd_toEndOf="@+id/roverIcon"
  app:layout_constraintStart_toStartOf="@+id/roverIcon"
  app:layout_constraintTop_toBottomOf="@+id/roverIcon" />

<TextView
  android:id="@+id/flightsLabel"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:layout_marginTop="15dp"
  android:text="@string/flights"
  app:layout_constraintEnd_toEndOf="@+id/flightsIcon"
  app:layout_constraintStart_toStartOf="@+id/flightsIcon"
  app:layout_constraintTop_toBottomOf="@+id/flightsIcon" />

<TextView
  android:id="@+id/spaceStationLabel"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:layout_marginTop="15dp"
  android:text="@string/space_stations"
  app:layout_constraintEnd_toEndOf="@+id/spaceStationIcon"
  app:layout_constraintStart_toStartOf="@+id/spaceStationIcon"
  app:layout_constraintTop_toBottomOf="@+id/spaceStationIcon" />

Circle images

<ImageView
  android:id="@+id/rocketIcon"
  android:layout_width="30dp"
  android:layout_height="30dp"
  android:src="@drawable/rocket_icon"
  app:layout_constraintCircle="@id/galaxyIcon"
  app:layout_constraintCircleAngle="270"
  app:layout_constraintCircleRadius="100dp" />

by default is Horizontal

ListView[ kotlin]

...........................................................................................................................................................................................................................

 val countries = arrayOf<String>("USA", "INDIA", "DUBAI")

        val mylistview = findViewById<ListView>(R.id.mylist)

        mylistview.adapter= ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, countries)

        mylistview.setOnItemClickListener { parent, view, position, id ->

            val toast = Toast.makeText(this, "HEllo\n " + countries[position], Toast.LENGTH_SHORT)

            toast.setGravity(Gravity.CENTER, 0 , 0)

            toast.show()

        }

...........................................................................................................................................................................................................................

RelativeLayout [ Login UI ]

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:app="http://schemas.android.com/apk/res-auto"

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="wrap_content"

    android:orientation="vertical"

    tools:context=".MainActivity">

    <EditText

        android:id="@+id/edit1"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:hint="username"

        android:layout_marginTop="120dp"

        android:inputType="textPersonName"

        android:ems="10"

        android:layout_centerHorizontal="true"/>

    <EditText

        android:id="@+id/edit2"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:hint="password"

        android:inputType="textPersonName"

        android:ems="10"

        android:layout_marginTop="10dp"

        android:layout_below="@+id/edit1"

        android:layout_centerHorizontal="true"/>

        <Button

            android:id="@+id/login"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:text="Login"

            android:layout_below="@+id/edit2"

            android:layout_alignParentLeft="true"

            android:layout_marginTop="20dp"

            android:layout_marginLeft="100dp"

            />

    <Button

        android:id="@+id/cancel"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="Cancel"

        android:layout_below="@+id/edit2"

        android:layout_alignParentRight="true"

        android:layout_marginRight="100dp"

        android:layout_marginTop="20dp"

        />

</RelativeLayout>

..................................................................................................................................................................................................................................

Display userName

val myUser = findViewById<EditText>(R.id.username)
val btn = findViewById<Button>(R.id.login)
btn.setOnClickListener {    val strMessage:String
    strMessage= myUser.getText().toString()
    Toast.makeText(this, "Hello $strMessage" , Toast.LENGTH_SHORT).show()
}