Learn Android programing step by step with Android Studio.

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>