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Android App Development Guide

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106 views13 pages

Android App Development Guide

Uploaded by

hackeromsutar
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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Practical 17

Q1)
XML file
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
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="match_parent"
tools:context=".MainActivity">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Hello World!"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>

JAVA FILE
package com.example.programforactivity;
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {


@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
protected void onStart()
{
super.onStart();
Log.d("OnStart","Activity is started");
Toast.makeText(getApplicationContext(),"Activity is
started",Toast.LENGTH_SHORT).show();
}
protected void onResume()
{
super.onResume();
Log.d("OnResume","Activity is in interaction");
Toast.makeText(getApplicationContext(),"Activity is in interaction
",Toast.LENGTH_SHORT).show();
}
protected void onPause()
{
super.onPause();
Log.d("OnPause","Activity is Minimized");
Toast.makeText(getApplicationContext(),"Activity is in Minimized
",Toast.LENGTH_SHORT).show();
}
protected void onStop()
{
super.onStop();
Log.d("OnStop","Activity get Stop");
Toast.makeText(getApplicationContext(),"Activity get Stop
",Toast.LENGTH_SHORT).show();
}
protected void onDestroy()
{
super.onDestroy();
Log.d("OnDestroy","Activity get Destroyed");
Toast.makeText(getApplicationContext(),"Activity get Destroyed
",Toast.LENGTH_SHORT).show();
}
protected void onRestart()
{
super.onRestart();
Log.d("OnRestart","Activity is Restarted");
Toast.makeText(getApplicationContext(),"Activity is Restarted
",Toast.LENGTH_SHORT).show();
}
}
OUTPUT:-
Practical 18
Q1)
XML file
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:textAlignment="center"
tools:context=".MainActivity">
<EditText
android:id="@+id/edt1"
android:minHeight="48dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:hint="Enter your URL"
android:layout_gravity="center"
android:layout_marginTop="200dp"
android:ems="12"
/>
<Button
android:id="@+id/btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Enter "
android:ems="8"
android:layout_gravity="center"
android:layout_marginTop="100dp"
android:minHeight="48dp"
/>
</LinearLayout>
package com.example.practical181;
import androidx.appcompat.app.AppCompatActivity;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Intent intent = new Intent(Intent.ACTION_WEB_SEARCH);
EditText edt = (EditText)findViewById(R.id.edt1);
Button btn = findViewById(R.id.btn);
btn.setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(View view){
Uri uri = Uri.parse("http://"+edt.getText().toString());
intent.setData(uri);
try{
startActivity(intent);
}catch(Exception e){
Log.d("Display Error","start activity errror ");
}}
}); }}
OUTPUT:-
Q2)
XML file
<?xml version="1.0" encoding="UTF-8" ?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
tools:context=".MainActivity"
android:layout_height="match_parent"
android:layout_width="match_parent"
android:orientation = "vertical"
>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text = "Smart Dialer"
android:textSize="40sp"
android:layout_gravity="center"
android:layout_marginTop="100dp"/>
<EditText
android:id="@+id/edt1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:ems="12"
android:inputType="numberDecimal"
android:hint="Enter mobile number"
android:layout_gravity="center"
android:layout_marginTop="40dp"
android:minHeight="48dp"
/>
<Button
android:id="@+id/btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_margin="80dp"
android:text="Submit"
/>

</LinearLayout>

JAVA FILE
package com.example.practical182;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;

public class MainActivity extends AppCompatActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
EditText edt = findViewById(R.id.edt1);
Button btn = findViewById(R.id.btn);
Intent intent = new Intent(Intent.ACTION_DIAL);

btn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
intent.setData(Uri.parse("tel:"+edt.getText().toString()));
startActivity(intent);
}
});
}
}

AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools">

<uses-feature
android:name="android.hardware.telephony"
android:required="false" />
<uses-permission android:name="android.permission.CALL_PHONE"/>

<application
android:allowBackup="true"
android:dataExtractionRules="@xml/data_extraction_rules"
android:fullBackupContent="@xml/backup_rules"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/Theme.Practical182"
tools:targetApi="31">
<activity
android:name=".MainActivity"
android:exported="true">
<intent-filter>
<action android:name="android.intent.action.MAIN" />

<category android:name="android.intent.category.LAUNCHER" />


</intent-filter>
</activity>
</application>
</manifest>
OUTPUT:-
Q3)
XML file
Activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".MainActivity">

<EditText
android:id="@+id/edt1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:hint="Enter number"
android:layout_gravity="center"
android:layout_marginTop="200dp"
android:inputType="numberDecimal"
android:ems="12"
android:minHeight="48dp"

/>
<Button
android:id="@+id/btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginTop="100dp"
android:text="Submit"

/>

</LinearLayout>

JAVA FILE
MainActivity.java
package com.example.pracitcal183;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;

public class MainActivity extends AppCompatActivity {

Intent intent;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
EditText edt = findViewById(R.id.edt1);
Button btn = findViewById(R.id.btn);
intent = new Intent(getApplicationContext(),secondActivity.class);
btn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
intent.putExtra("number",Integer.parseInt(edt.getText().toString()));
startActivity(intent);

}
});
}
}
XML file
Activity_second.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
tools:context=".secondActivity"
android:layout_height="match_parent"
android:layout_width="match_parent"
>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Value"
android:layout_centerInParent="true"
android:textSize="40sp"
android:id="@+id/txtres"
/>

</RelativeLayout>
JAVA FILE
secondActivity.java
package com.example.pracitcal183;
import androidx.appcompat.app.AppCompatActivity;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

public class secondActivity extends AppCompatActivity {

public int factorial(int val){


if (val == 0)
return 1;
else
return(val * factorial(val-1));
}

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_second);
TextView txt = findViewById(R.id.txtres);
Intent intent = getIntent();
int value = intent.getIntExtra("number",1);
Log.d("factioral",Integer.toString(factorial(value)));
txt.setText("factorial is :"+Integer.toString(factorial(value)));

}
}
OUTPUT:-

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