how to add button click event in android studio

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So I have done some research, and after defining you button as an object by the code

private Button buttonname;
buttonname = (Button) findViewById(R.id.buttonnameinandroid) ;

here is my problem

buttonname.setOnClickListener(this); //as I understand it, the "**this**" denotes the current `view(focus)` in the android program

then your OnClick() event...

Problem:

When I type in the "this", it says:

setOnClickListener (Android.View.view.OnClickListener) in View cannot be applied to (com.helloandroidstudio.MainActivity)

I have no idea why?

here is the code from the .java file

import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

public class MainActivity extends ActionBarActivity {

    private Button btnClick;
    private EditText Name, Date;
    private TextView msg, NameOut, DateOut;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        btnClick = (Button) findViewById(R.id.button) ;
        btnClick.setOnClickListener(this);
        Name = (EditText) findViewById(R.id.textenter) ;
        Date = (EditText) findViewById(R.id.editText) ;
        msg = (TextView) findViewById(R.id.txtviewOut) ;
        NameOut = (TextView) findViewById(R.id.txtoutName) ;
        DateOut = (TextView) findViewById(R.id.txtOutDate) ;
        if (savedInstanceState == null) {
            getSupportFragmentManager().beginTransaction()
                    .add(R.id.container, new PlaceholderFragment())
                    .commit();
        }
    }

    public void onClick(View v)
    {
        if (v == btnClick)
        {
            if (Name.equals("") == false && Date.equals("") == false)
            {
                NameOut = Name;
                DateOut = Date;
                msg.setVisibility(View.VISIBLE);
            }
            else
            {
                msg.setText("Please complete both fields");
                msg.setVisibility(View.VISIBLE);
            }
        }
        return;

    }

SetOnClickListener (Android.View.view.OnClickListener) in View cannot be applied to (com.helloandroidstudio.MainActivity)

This means in other words (due to your current scenario) that your MainActivity need to implement OnClickListener:

public class Main extends ActionBarActivity implements View.OnClickListener {
   // do your stuff
}

This:

buttonname.setOnClickListener(this);

means that you want to assign listener for your Button "on this instance" -> this instance represents OnClickListener and for this reason your class have to implement that interface.

It's similar with anonymous listener class (that you can also use):

buttonname.setOnClickListener(new View.OnClickListener() {

   @Override
   public void onClick(View view) {

   }
});

how to add button click event in android studio, As another quick Android example, this Java source code shows how to add a “​click listener” (on click/tap event) to an Android Button : When the user clicks a button, the Button object receives an on-click event. To make click event work add android:onClickattribute to the Button element in your XML layout. The value for this attribute must be the name of the method you want to call in response to a click event. The Activity hosting the layout must then implement the corresponding method.

package com.mani.smsdetect;

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

public class MainActivity extends Activity implements View.OnClickListener {

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

        //Intialization Button

        btnClickMe = (Button) findViewById(R.id.btnClickMe);

        btnClickMe.setOnClickListener(MainActivity.this);
        //Here MainActivity.this is a Current Class Reference (context)
    }

    @Override
    public void onClick(View v) {

        //Your Logic
    }
}

Buttons, We can define click event handler for button by adding android:onClick attribute to In case if you are not aware of creating an app in android studio check this  Button; ImageButton; Responding to Click Events. When the user clicks a button, the Button object receives an on-click event. To define the click event handler for a button, add the android:onClick attribute to the <Button> element in your XML layout. The value for this attribute must be the name of the method you want to call in response to a click event.

Button button= (Button)findViewById(R.id.buttonId);
button.setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(View view) {
    // click handling code
   }
});

Button, Button is no more without its onclick event function. Because after putting onClick event on button click you can use button. You can get values from EditText, autocompletetextview..etc. Button click function works with setOnClickListener (). So here is the complete step by step tutorial for How to create onClick event in android on Button click.

When you define an OnClickListener (or any listener) this way

btnClick.setOnClickListener(this);

you need to implement the OnClickListener in your Activity.

public class MainActivity extends ActionBarActivity implements OnClickListener{

button click event in android studio, Button Example In Android Studio: Step 1: Create a new project in Android Studio and name it ButtonExample. Select File -> New -> New Project and Fill the forms and click "Finish Step 2: Now open res -> layout -> xml (or) activity_main.xml and add following code. Here we are designing the UI of

public class MainActivity extends AppCompatActivity implements View.OnClickListener

Whenever you use (this) on click events, your main activity has to implement ocClickListener. Android Studio does it for you, press alt+enter on the 'this' word.

OnClickListener for Multiple Buttons, android.widget.Button is a frequently used widget in android application. You can add as many buttons as you need in a layout view object. But how to listen and response the click event when user click the buttons? This example will tell you how. 1. Listen And Response Button Click Event. You have two methods to response button click event as

Android Button with onClick Example, I have created one image button in android, but when I am clicking on that button nothing is happening. I have set all the properties but still nothing is happening. So can you help me that where I

Android 2019 : Adding code to a Button Click in Android Studio , As another quick Android example, this Java source code shows how to add a “click listener” (on click/tap event) to an Android Button: public class MyActivity extends Activity { protected void onCreate (Bundle icicle) { super.onCreate (icicle); setContentView (R.layout.my_layout_id); final Button button = (Button) findViewById (R.id.my_cool_button); button. setOnClickListener (new View.OnClickListener () { public void onClick (View v) { // your handler code here } }); } }

Android: How to add a click listener to a Button (action listener , Android's callOnClick() (added in API 15) can sometimes be a better choice in my experience than performClick().If a user has selection sounds enabled, then performClick() could cause the user to hear two continuous selection sounds that are somewhat layered on top of each other which can be jarring.

Comments
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