Learn Android programing step by step with Android Studio.: 2020

Monday, July 27, 2020

How to exit Application when click on Back Button Android?

Hello,
This article is for Beginner and people who want to learn Android .This article is about How to exit Application when click on Back Button Android?
    import android.support.v7.app.AppCompatActivity;
    import android.os.Bundle;
    import android.view.View;
    import android.widget.Button;
    import android.widget.ImageView;
    import android.widget.Toast;


public class MainActivity extends AppCompatActivity {




        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);



        }
    @Override
    public void onBackPressed()
    {
        finish();
    }

    }

Thursday, July 23, 2020

Image setOnclickListener Android Example

Hello,
This article is for Beginner and people who want to learn Android .This article is about image setOnClickListener Example. 

1. XML File .
activity_main -

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    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:gravity="center"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <ImageView
        android:id="@+id/img"
        android:background="@drawable/android_logo"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"/>

</LinearLayout>

2.Java File
MainActivity

import android.support.v7.app.AppCompatActivity;
    import android.os.Bundle;
    import android.view.View;
    import android.widget.Button;
    import android.widget.ImageView;
    import android.widget.Toast;


public class MainActivity extends AppCompatActivity {
    ImageView img;



        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
            img=findViewById(R.id.img);
            img.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    Toast.makeText(MainActivity.this, "Image", Toast.LENGTH_SHORT).show();
                }
            });


        }
    }

Saturday, July 18, 2020

How to display image in Imageview?

Hello,

This article is for Beginner and people who want to learn Android .This article is about How to display image in Imageview Example.

1. XML File .

activity_main -

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    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:gravity="center"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <ImageView
        android:id="@+id/img"
        android:background="@drawable/android_logo"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"/>

</LinearLayout>

Tuesday, July 14, 2020

How to Show Toast on Button Click Android ?

Hello,

This article is for Beginner and people who want to learn Android .This article is about How to show Toast On Button Click .

1. XML File .

activity_main -

<LinearLayout
    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:gravity="center"
    android:layout_height="match_parent"
    tools:context=".MainActivity">


<Button
    android:id="@+id/btnshow"
    android:text="Show"
    android:textColor="#fff"
    android:background="@color/colorAccent"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"/>

</LinearLayout>

2.Java File
MainActivity


    import android.support.v7.app.AppCompatActivity;
    import android.os.Bundle;
    import android.view.View;
    import android.widget.Button;
    import android.widget.Toast;


public class MainActivity extends AppCompatActivity {
    Button btnshow;


        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
            btnshow=findViewById(R.id.btnshow);
            btnshow.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    Toast.makeText(MainActivity.this, "Heyyy", Toast.LENGTH_SHORT).show();
                }
            });

        }
    }

Tuesday, June 23, 2020

How to show Error Message in EditText ?

Hello,

This article is for Beginner and people who want to learn Android .This article is about How to show Error Message in EditText Example.

1. XML File .

activity_main -

<LinearLayout
    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:gravity="center"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

<EditText
    android:id="@+id/edt"
    android:text="Android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:hint="Enter Name"/>


</LinearLayout>

2.Java File
MainActivity

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.EditText;


public class MainActivity extends AppCompatActivity {
EditText edt;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        edt=findViewById(R.id.edt);
        if(edt.getText().toString().equals(""))
        {
            edt.setError("Enter Name");
        }
        else
        {

        }

    }
}

Friday, June 12, 2020

How to clear Edittext Data on button click?

Hello,
This article is for Beginner and people who want to learn Android .This article is about How to clear Edittext Data on Button click? Example. 

1. XML File .
activity_main -

<LinearLayout
    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:gravity="center"
    android:orientation="vertical"
    android:layout_height="match_parent"
    tools:context=".MainActivity">
    <EditText
        android:id="@+id/edt"
        android:layout_marginLeft="10dp"
        android:layout_marginRight="10dp"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="Name"/>
    <Button
        android:id="@+id/btn_clear"
        android:text="Clear"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"/>


</LinearLayout>

2.Java File

MainActivity

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;


public class MainActivity extends AppCompatActivity {
    EditText edt;
    Button btn_clear;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        edt=findViewById(R.id.edt);
        btn_clear=findViewById(R.id.btn_clear);
        btn_clear.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                edt.getText().clear();
            }
        });





}
}

Monday, June 8, 2020

Android Beginner- EditText Example

Hello,

This article is for Beginner and people who want to learn Android .This article is about EditText Example.

1. XML File .

activity_main -

<LinearLayout
    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:gravity="center"
    android:layout_height="match_parent"
    tools:context=".MainActivity">
    <EditText
        android:id="@+id/edt"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="Name"/>

</LinearLayout>

Sunday, June 7, 2020

How to get Edittext data on button click?

Hello,
This article is for Beginner and people who want to learn Android .This article is about How to get Edittext Data on Button click? Example. 

1. XML File .
activity_main

<LinearLayout
    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:gravity="center"
    android:orientation="vertical"
    android:layout_height="match_parent"
    tools:context=".MainActivity">
    <EditText
        android:id="@+id/edt"
        android:layout_marginLeft="10dp"
        android:layout_marginRight="10dp"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="Name"/>
    <Button
        android:id="@+id/btn_show"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Show"/>

</LinearLayout>

2.Java File
MainActivity -

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;


public class MainActivity extends AppCompatActivity {
    EditText edt;
    Button btn_show;





    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        edt=findViewById(R.id.edt);
        btn_show=findViewById(R.id.btn_show);
        btn_show.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String getdata=edt.getText().toString();
                Toast.makeText(MainActivity.this, ""+getdata, Toast.LENGTH_SHORT).show();
            }
        });




}
}

Saturday, June 6, 2020

Android Beginner- Button and Button setOnClickListener Example

Hello,

This article is for Beginner and people who want to learn Android .This article is about to Button and Button setOnClickListener Example.

1. XML File .

activity_main -

<LinearLayout
    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:gravity="center"
    android:layout_height="match_parent"
    tools:context=".MainActivity">
<Button
    android:id="@+id/btn"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:background="#000"
    android:textColor="#fff"
    android:text="Button"/>
</LinearLayout>

2.Java File
MainActivity

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;


public class MainActivity extends AppCompatActivity {
    Button btn;




    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        btn=findViewById(R.id.btn);
        btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Toast.makeText(MainActivity.this, "Heyyyyyyyyyyyyyyy", Toast.LENGTH_SHORT).show();

            }
        });





}
}

Tuesday, June 2, 2020

Android Beginner- TextView Example

Hello,

This article is for Beginner and people who want to learn Android .This article is about to TextView Example.

1. XML File .

activity_main -

<LinearLayout
    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:gravity="center"
    android:layout_height="match_parent"
    tools:context=".MainActivity">
<TextView
    android:id="@+id/txt"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Heyyyy"/>

</LinearLayout>

2.Java File

MainActivity
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.TextView;


public class MainActivity extends AppCompatActivity {
    TextView txt;



    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        txt=findViewById(R.id.txt);
        txt.setText("Hey People");




}
}

Saturday, May 30, 2020

How to disable future dates in Datepicker in Android Studio?

Hello,
This article is for Beginner and people who want to learn Android .This article is about to disabling future dates in datepicker.

1. XML File .

activity_main -

<LinearLayout
    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:gravity="center"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

<EditText
    android:id="@+id/edt"
    android:hint="Select Date"
    android:focusable="false"
    android:inputType="none"
    android:layout_width="match_parent"
    android:layout_height="wrap_content" />


</LinearLayout>

2.Java File.
MainActivity-

 import android.app.DatePickerDialog;
    import android.support.v7.app.AppCompatActivity;
    import android.os.Bundle;
    import android.view.View;
    import android.widget.DatePicker;
    import android.widget.EditText;

    import java.util.Calendar;


public class MainActivity extends AppCompatActivity {
        EditText edt;
        DatePickerDialog datePickerDialog;


        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
            edt=findViewById(R.id.edt);
            final Calendar calendar=Calendar.getInstance();
            final int day=calendar.get(Calendar.DAY_OF_MONTH);
            final int year=calendar.get(Calendar.YEAR);
            final int month=calendar.get(Calendar.MONTH);
            edt.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    datePickerDialog=new DatePickerDialog(MainActivity.this, new DatePickerDialog.OnDateSetListener() {
                        @Override
                        public void onDateSet(DatePicker view, int year, int month, int dayOfMonth) {
                            edt.setText(dayOfMonth+"/"+(month+1)+"/"+year);
                        }
                    },year,month,day);
                    datePickerDialog.getDatePicker().setMaxDate(calendar.getTimeInMillis());




                  datePickerDialog.show();
                }

            });



        }
    }

Wednesday, May 27, 2020

How to disable previous dates in datepicker in Android Studio?

Hello,
This article is for Beginner and people who want to learn Android .This article is about to disabling previous dates in datepicker.

1. XML File .

activity_main -

<LinearLayout
    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:gravity="center"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

<EditText
    android:id="@+id/edt"
    android:hint="Select Date"
    android:focusable="false"
    android:inputType="none"
    android:layout_width="match_parent"
    android:layout_height="wrap_content" />


</LinearLayout>

2.Java File.

MainActivity-

    import android.app.DatePickerDialog;
    import android.support.v7.app.AppCompatActivity;
    import android.os.Bundle;
    import android.view.View;
    import android.widget.DatePicker;
    import android.widget.EditText;

    import java.util.Calendar;


public class MainActivity extends AppCompatActivity {
        EditText edt;
        DatePickerDialog datePickerDialog;


        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
            edt=findViewById(R.id.edt);
            final Calendar calendar=Calendar.getInstance();
            final int day=calendar.get(Calendar.DAY_OF_MONTH);
            final int year=calendar.get(Calendar.YEAR);
            final int month=calendar.get(Calendar.MONTH);
            edt.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    datePickerDialog=new DatePickerDialog(MainActivity.this, new DatePickerDialog.OnDateSetListener() {
                        @Override
                        public void onDateSet(DatePicker view, int year, int month, int dayOfMonth) {
                            edt.setText(dayOfMonth+"/"+(month+1)+"/"+year);
                        }
                    },year,month,day);
                     datePickerDialog.getDatePicker().setMinDate(calendar.getTimeInMillis());



                  datePickerDialog.show();
                }

            });



        }
    }

Monday, May 25, 2020

How to popup datepicker when click on edittext in Android Studio?

Hello,

This article is for Beginner and people who want to learn Android .This article is about How to popup Datepicker when click on Editext ?

1. XML File .

activity_main -

<LinearLayout
    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:gravity="center"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

<EditText
    android:id="@+id/edt"
    android:hint="Select Date"
    android:focusable="false"
    android:inputType="none"
    android:layout_width="match_parent"
    android:layout_height="wrap_content" />


</LinearLayout>

2. Java File .


MainActivity -

import android.app.DatePickerDialog;
    import android.support.v7.app.AppCompatActivity;
    import android.os.Bundle;
    import android.view.View;
    import android.widget.DatePicker;
    import android.widget.EditText;

    import java.util.Calendar;


public class MainActivity extends AppCompatActivity {
        EditText edt;
        DatePickerDialog datePickerDialog;


        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
            edt=findViewById(R.id.edt);
            Calendar calendar=Calendar.getInstance();
            final int day=calendar.get(Calendar.DAY_OF_MONTH);
            final int year=calendar.get(Calendar.YEAR);
            final int month=calendar.get(Calendar.MONTH);
            edt.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    datePickerDialog=new DatePickerDialog(MainActivity.this, new DatePickerDialog.OnDateSetListener() {
                        @Override
                        public void onDateSet(DatePicker view, int year, int month, int dayOfMonth) {
                            edt.setText(dayOfMonth+"/"+(month+1)+"/"+year);
                        }
                    },year,month,day);
                  datePickerDialog.show();
                }

            });



        }
    }

Saturday, May 23, 2020

How to display accurate date in datepicker using Android Studio?

Hello,

This article is for Beginner and people who want to learn Android .This article is about How to display accurate date in Android Studio?

In previous Blog we learnt to implement calendar view using datepicker. If you haven't watched this blog then follow the below link -

https://learnandroid150.blogspot.com/2020/05/datepicker-example-using-android-studio.html

1. XML File .

activity_main -

<LinearLayout    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:orientation="vertical"

  android:layout_height="match_parent"

  tools:context=".MainActivity">
<DatePicker

android:id="@+id/dtepicker"

 android:layout_width="wrap_content"

android:layout_height="wrap_content">

</DatePicker>

</LinearLayout>


2.Java File.
MainActivity-



import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.DatePicker;
import android.widget.ListView;
import android.widget.Spinner;
import android.widget.Toast;

import java.util.Calendar;

public class MainActivity extends AppCompatActivity {
    //declare variable 
   DatePicker dtepicker;


    @Override    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
            
       dtepicker=findViewById(R.id.dtepicker);
        Calendar calendar=Calendar.getInstance();
        dtepicker.init(calendar.get(Calendar.YEAR), calendar.get(Calendar.MONTH), calendar.get(Calendar.DAY_OF_MONTH), new DatePicker.OnDateChangedListener() {
            @Override        
            public void onDateChanged(DatePicker view, int year, int monthOfYear, int dayOfMonth) {
                String monthvalue= String.valueOf(dtepicker.getMonth()+1);
                Toast.makeText(MainActivity.this, ""+dtepicker.getDayOfMonth()+"-"+monthvalue+"-"+dtepicker.getYear(), Toast.LENGTH_SHORT).show();
            }
        });



}
}

Monday, July 27, 2020

Thursday, July 23, 2020

Saturday, July 18, 2020

Tuesday, July 14, 2020

Tuesday, June 23, 2020

Friday, June 12, 2020

Monday, June 8, 2020

Sunday, June 7, 2020

Saturday, June 6, 2020

Tuesday, June 2, 2020

Saturday, May 30, 2020

Hello,This article is for Beginner and people who want to learn Android .This article is about to disabling future dates in datepicker.1. XML File .activity_main -

Wednesday, May 27, 2020

Hello,This article is for Beginner and people who want to learn Android .This article is about to disabling previous dates in datepicker.1. XML File .activity_main -

Monday, May 25, 2020

Saturday, May 23, 2020

Hello,
This article is for Beginner and people who want to learn Android .This article is about to disabling future dates in datepicker.

1. XML File .

activity_main -

Hello,
This article is for Beginner and people who want to learn Android .This article is about to disabling previous dates in datepicker.

1. XML File .

activity_main -