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Saturday 17 June 2017

How to Change Button image when button is clicked

No comments : Posted by Millioninformations at 03:42 Labels: ANDROID , TUTORIALS

Download Source Code of this Example

Read

How to Use Image as a Button in Android

After practicing the above example you can do this example.

Changing Button image when the button is clicked is popular in may android applications.

For example : In Movie tickets booking application , if we select a seat it's image will be changed to different color or image.

We are going to do the same in our Example.

First create a new project drag and drop a button, copy a chair image from your computer and paste it in new drawable folder under res directory and do the xml coding part required to set the image to the button as you have practiced in the last example.

Till that you will get the result as:

Then also copy and paste another chair image which is in different color. i have choosen red color chair.

Then Open MainActivity.java and register the Button part and also include a boolean variable to check the button is clicked or not clicked.

Then use switch staement and type the code as in the image

public class MainActivity extends Activity implements OnClickListener {

    Button chair;
    Boolean b=false;
         @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
         chair=(Button)findViewById(R.id.button1);
         chair.setOnClickListener(this);

    }

    @Override
    public void onClick(View v)
    {
    switch (v.getId()) {
        case R.id.button1:
            if(b)
            {
                chair.setBackgroundResource(R.drawable.ch);
                b=false;
            }
            else
            {
                chair.setBackgroundResource(R.drawable.redchair);
                b=true;
            }
            break;

        default:
            break;
        }

    }
    }

Change-Button-image-when-button-is-clicked-source-code

In the above code i have used the if conditon to check whether the chair is clicked or not.

If the chair is not clicked the black chair will appear or if it is clicked red chair will appear, if the chair is clicked again the black chair will appear.

This condition will be useful in real time application because, the user may want to select a chair first but later he can choose a different chair, the application must be user friendly, thus we are using such a code.

the setBackgroundResource is similar to that setting background in xml file.

The output will be

Change-Button-image-when-button-is-clicked-output

When clicked again

You can try out with your own ideas also you can combine this with

Working with multiple buttons in Android

use switch statement with different button id's and with the help of if else conditon you can change multiple button's images.

Practice the previous examples well.

How to Use Image as a Button in Android

No comments : Posted by Millioninformations at 23:33 Labels: ANDROID , TUTORIALS

Download Source Code

Still now we have learned to work with buttons, now we will learn to use images as buttons , as we see now a days in our mobiles.

Its just copy pasting a image in a drawable folder which is under the res folder and adding it in the activity_main.xml file.

In the post Changing color of a button

we used color code inside the android:background="#EAAC00" instead of the color code we are typing the location of the image ex: android:background= "@drawable/imagename" .

Let us see in detail.

Create a New Android Application Project, and drag and drop a Button in the layout.

Now create a New Folder in the res folder named as drawable.

Right click on the res folder and click New---> Folder and name the folder as drawable and click Finish.

Now the created drawable folder can be seen below the res folder.

Now copy any image that you want use as button and paste in the drawable folder.

Copy image from your computer

and right click on the drwable folder and paste it.

Now you can see that the image has been pasted inside the drawable folder.

Now open activity_main.xml file and delete the android:text="Button" since we do not need any text for our image.

then add the following code android:background="@drawable/music" as in the image

Then save it and open the Graphics Layout .

Now the button is changed into an image, but it is too big, we can resize it by using the width and height property in the activity_main.xml file.

I am using 100 dp for both width and height.

save it and open Graphics layout

Now we can see the resized image button.

Now we want make some action for that button, we can simply use a Toast message for that.

Open MainActivity.java and register the button , implement the listener interface and add the unimplemented methods as we saw in the post How to use Buttons in Android .

Then write the Toast message code

Now save and run the program.

Read

How to use Android Phone as an Emulator

You can try with multiple buttons using images as we saw in the post
Working with Multiple Buttons in Android

You can try the combinations of these example and make your own example.

Also Read:

How to change Background Color in Android

9 comments : Posted by Millioninformations at 03:20 Labels: ANDROID , TUTORIALS

Changing the background color of the Layout or screen in android is very simple to do.

Open a New Project in Android Eclipse

Enter the Project Name For Ex: BackgroundColor

and click Next till the Finish comes and also click Finish.

The new Project will be created

Click the activity_main.xml below this image to open the xml file.

Add the following line inside the Relative layout tag

android:background="#EACC00"

How-to-change-Background-Color-in-Android-code

Then save the file and open the Graphics Layout you can see the background color has been changed.

How-to-change-Background-Color-in-Android-output

The #EAAC00 is HTML color code , you get more colors from the internet.

You can choose your desired background colors for your android app.

How to change Button color in Android

No comments : Posted by Millioninformations at 02:31 Labels: ANDROID , TUTORIALS

It is very easy to change the Button color in android with just one line of code.

Open New Android Application project and drag and drop the button in the UI interface .

Then double click on the button it will take you to the activity_main.xml in which you can see the button coding

In that add the following code

android:background="any html color code"

After typing the code save it and click the Graphical Layout to see the change of the button color.

You can get the HTML color code in the internet.

It ranges from 0-9 and A-F , combination of these 6 digits will make a color.

Also Read:

Working with Buttons

Simple Calculator app in Android

25 comments : Posted by Millioninformations at 07:44 Labels: ANDROID , TUTORIALS

Download Source Code

This post is similar to that of

Adding two numbers in Android

We are using different operations like subtraction, multiplication,division and also addition.

Read Working with Multiple Buttons

This example is the combination of the last two post

Adding two numbers in Android and Working with Multiple buttons,so if you have practiced that well this program is easy for you or else practice that both examples and continue this example.

We need to make the design plan.

Create a new project and Just drag and drop and edit as per in the design.

The number 1 and Number 2 can be typed using the help of hint property.

To use the hint right click on the Plain Text and EditHint

Then register the buttons,edittext's, textview's in MainActivity.java

After that add switch case statement as in the last post and include the addition of two numbers example code and also include code for other operations also as in the image.

Simple-Calculator-app-in-Android-source-code

I think it is very easy to understand right! yeah it's so simple to develop android apps than you think if you have basic programming concepts and interest to learn!!!

Let we see the Output