How to realize the function of listener in android

Editor to share with you how to achieve android listener function, I believe that most people do not know much about it, so share this article for your reference, I hope you can learn a lot after reading this article, let's go to know it!

Code sharing:

Import androidx.appcompat.app.AppCompatActivity;import android.content.Intent;import android.os.Bundle;import android.view.View;import android.widget.Button;public class MainActivity extends AppCompatActivity {@ Override protected void onCreate (Bundle savedInstanceState) {super.onCreate (savedInstanceState); setContentView (R.layout.activity_main); Button button1= (Button) findViewById (R.id.button1) Button1.setOnClickListener (new View.OnClickListener () {@ Override public void onClick (View v) {Intent intent=new Intent (MainActivity.this,Main2Activity.class); startActivity (intent);}})

The bag behind the import will be automatically given to you by lighting a small light bulb after the system reports an error.

Pay attention to the case. Be careful not to repeat your name. The name should be as practical as possible.

In the process of Android application development, common listening events are as follows:

(1) ListView event monitoring setOn ItemSelectedListener: triggered when mouse scrolls: triggered when clicked

(2) EditText event listening setOnKeyListener: triggered when the focus is obtained.

(3) RadioGroup event monitoring setOnCheckedChangeListener: triggered when clicked

(4) CheckBox event monitoring setOnCheckedChangeListener: triggered when clicked

(5) Spinner event monitoring setOnltemSelectedListener: triggered when clicked

(6) DatePicker event monitoring

OnDateChangedListener: triggered when the date is changed

(7) DatePickerDialog event listening onDateSetListener: triggered when the date is set

(8) TimePicker event listening onTimeChangedListener: triggered when the time changes

(9) TimePickerDialog event listening onTimeSetListener: triggered when the time is set

(10) Button.ImageButton event monitoring setOnClickListener: triggered when clicked

(11) triggered when Menu event listens when onOptionsltemSelected; clicks

(12) Gallery event monitoring setOnItemClickListener: triggered when clicked

(13) GridView event monitoring setOnltemClickListener: triggered when clicked

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