Android Button setOnClickListener Design

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I am building an Android Application. I've noticed that I am creating many repetitions of code similar to this in each of my classes:

Button buttonX = (Button)findViewById(R.id.buttonXName);
// Register the onClick listener with the implementation above
buttonX.setOnClickListener(new OnClickListener() {
    public void onClick(View v)
    {
        //DO SOMETHING! {RUN SOME FUNCTION ... DO CHECKS... ETC}
    } 
});

I now have fifteen buttons and this is making my code ugly. Does anyone have a class or some examples on how I can turn all these codes into something more efficient, so I can:

  1. Create the button object {Button buttonX (Button)findViewById(R.id.buttonXName);}
  2. Set the listener {buttonX.setOnClickListener(new OnClickListener()}
  3. Determine if it was clicked {public void onClick(View v)}
  4. Then run specific code for each button?

If anyone knows anything, I'd appreciate it.

If you're targeting 1.6 or later, you can use the android:onClick xml attribute to remove some of the repetitive code. See this blog post by Romain Guy.

<Button 
   android:height="wrap_content"
   android:width="wrap_content"
   android:onClick="myClickHandler" />

And in the Java class, use these below lines of code:

class MyActivity extends Activity {
    public void myClickHandler(View target) {
        // Do stuff
    }
}

Button, To make click event work add android:onClick attribute to the Button element in your It won't work if you use this event handler in fragment because onClick attribute Layouts in Android UI Design · Introduction to Retofit 2 in android | Set 1  The following are Jave code examples for showing how to use setOnClickListener() of the android.widget.Button class. You can vote up the examples you like. Your votes will be used in our system to get more good examples.

Implement OnClickListener() on your Activity...

public class MyActivity extends Activity implements View.OnClickListener {
}

For each button use...

buttonX.setOnClickListener(this);

In your Activity onClick() method test for which button it is...

@Override
public void onClick(View view) {
    if (View.equals(buttonX))
        // Do something
}

Also in onClick you could use view.getId() to get the resource ID and then use that in a switch/case block to identify each button and perform the relevant action.

Android Button setOnClickListener Example, You add the listener with the setOnClickListener method, and; You need to implement the onClick method. If you needed to see how to add a  You add the listener with the setOnClickListener method, and. You need to implement the onClick method. If you needed to see how to add a listener to an Android Button, I hope this example code is helpful. onclicklistener. An Android Button click (tap) listener example. Source code for an Android ViewPager example (Activity and Fragment)

Android lambada solution
public void registerButtons(){
    register(R.id.buttonName1, ()-> {/*Your code goes here*/});
    register(R.id.buttonName2, ()-> {/*Your code goes here*/});
    register(R.id.buttonName3, ()-> {/*Your code goes here*/});
}

private void register(int buttonResourceId, Runnable r){
    findViewById(buttonResourceId).setOnClickListener(v -> r.run());
}
Switch case solution solution
public void registerButtons(){
    register(R.id.buttonName1);
    register(R.id.buttonName2);
    register(R.id.buttonName3);
}

private void register(int buttonResourceId){
    findViewById(buttonResourceId).setOnClickListener(buttonClickListener);
}

private OnClickListener buttonClickListener = new OnClickListener() {

    @Override
    public void onClick(View v){
        switch (v.getId()) {
            case R.id.buttonName1:
                // TODO Auto-generated method stub
                break;
            case R.id.buttonName2:
                // TODO Auto-generated method stub
                break;
            case View.NO_ID:
            default:
                // TODO Auto-generated method stub
                break;
        }
    }
};

Handling Click events in Button, This page provides Java code examples for android.widget.Button.​setOnClickListener. The examples are extracted from open source Java projects. Android Button widget is the most important UI element in the Android app. You can perform Operations by button click like send Email, Message, WhatsApp, etc all this want action where Button is doing same. Button widget comes with default design and color schema but you can change its color, design, size, etc according to your requirements.

Since setOnClickListener is defined on View not Button, if you don't need the variable for something else, you could make it a little terser like this:

findViewById(R.id.buttonXName).setOnClickListener(new OnClickListener() {
    public void onClick(View v) {
    //DO SOMETHING! {RUN SOME FUNCTION ... DO CHECKS... ETC}
    } 
});

Android: How to add a click listener to a Button (action listener , I am building an Android Application. I've noticed I am creating many repetitions of code similar to this in each of my classes: Button buttonX  Teams. Q&A for Work. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information.

You can use array to handle several button click listener in android like this: here i am setting button click listener for n buttons by using array as:

Button btn[] = new Button[n]; 

NOTE: n is a constant positive integer

Code example:

//class androidMultipleButtonActions 
package a.b.c.app;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class androidMultipleButtonActions extends Activity implements OnClickListener{
    Button btn[] = new Button[3];

    public void onCreate(Bundle savedInstanceState) {   
    super.onCreate(savedInstanceState);
        setContentView(R.layout.main);        
        btn[0] = (Button) findViewById(R.id.Button1);
        btn[1] = (Button) findViewById(R.id.Button2);
        btn[2] = (Button) findViewById(R.id.Button3);
        for(int i=0; i<3; i++){
            btn[i].setOnClickListener(this);
        }           
    }

    public void onClick(View v) {
        if(v == findViewById(R.id.Button1)){
            //do here what u wanna do.
        }
        else if(v == findViewById(R.id.Button2)){
            //do here what u wanna do.
        }
        else if(v == findViewById(R.id.Button3)){
            //do here what u wanna do.
        }
    }
}

Note: First write an main.xml file if u dont know how to write please mail to: wesagnd@yahoo.com

Java Code Examples android.widget.Button.setOnClickListener, In this video we will learn, how to set OnClickListeners for multiple buttons and handle them all Duration: 3:32 Posted: Dec 24, 2017 mAddTaskButton = (Button) findViewById(R.id.addTaskButton); before you call mAddTaskButton.setOnClickListener (). improve this answer. answered May 28 '15 at 20:29. 29 silver badges. 54 bronze badges. I have the same problem but I have initialized it correctly. – Mustafa Mohammadi Jul 31 '16 at 10:57. Casting to Button is redundant

Android Button setOnClickListener Design Help, Following code snippets has the setOnClickListener set over a button. button.​setOnClickListener(object : View.OnClickListener { override fun onClick(v: View?)​  Android Button represents a push-button. The android.widget.Button is subclass of TextView class and CompoundButton is the subclass of Button class. There are different types of buttons in android such as RadioButton, ToggleButton, CompoundButton etc. Android Button Example with Listener. Here, we are going to create two textfields and one

OnClickListener for Multiple Buttons, onClickListener() mean?? explain me briefly what does "View" datatype really mean in View; import android.widget.Button; public class LaunchActivity extends Activity { public Button mLaunchButton; @Override Tracks: Web Design · Web Development · Rails Development · PHP Development · iOS  Android Button Maker Android Button Maker is online tool to generate buttons code for Android Apps. Android API provide Drawable Resources where XML file defines geometric shape, including colors, border and gradients. These button is generating based on shape drawable XML code which load faster compare to normal PNG buttons.

Android Button Using Kotlin, OnClickListener for Multiple Buttons - Android Studio Tutorial Instead of passing an anonymous inner class to the setOnClickListener method, we will pass the activity itself and implement the

Comments
  • Try Kotlin
  • Thank you. This is the perfect solution.
  • weird, this didn't work with my Dialog. I got an exception saying the handler didn't exist, but I did definitely define the handler!
  • @SomeoneSomewhere I think it search the view in the activity context. Handlers are out of game.
  • @dgmltn is it good practice to 'let view know about Activity internals' ?
  • Is this really an improvement?
  • @Corey Sunwold: It's all pretty subjective but using setOnClickListener(this); is a lot less ugly and reduces the button creation part of the code by not having inline onClick() declarations. Having only one onCLick() code block and, in particular, using a switch/case code block to identify which button is pressed puts an easy test in a separate area of main code. More than that, each 'case' could simply call a method in a 'helper' class located elsewhere. I can think of another way or two of doing things but code still has to go somewhere.
  • Squonk: That makes more sense, I hadn't considered it from a testability standpoint (probably should have). Thanks.