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mbt1.setOnTouchListener(new View.OnTouchListener() {
            @Override
            public boolean onTouch(View v, MotionEvent event) {
                switch (event.getAction()){
                    case MotionEvent.ACTION_DOWN:
                        Log.d("listener","touch");
                        break;
                }
                return false;
            }
        });

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public class eventActivity extends AppCompatActivity implements View.OnClickListener

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ebt1 = findViewById(R.id.ebt1);
        ebt1.setOnClickListener(eventActivity.this);

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@Override
    public void onClick(View v) {
        switch (v.getId()){
            case R.id.ebt1:
                Toast.makeText(eventActivity.this , "click...",Toast.LENGTH_LONG).show();
                break;
        }
    }

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<Button
        android:id="@+id/ebt1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="click"
        android:textSize="20sp"
        app:layout_constraintTop_toTopOf="parent"
        android:layout_marginTop="50dp"
        android:onClick="show"
        />

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public void show(View view){             //一定是public void
        switch (view.getId()){
            case R.id.ebt1:
                Toast.makeText(eventActivity.this , "click...",Toast.LENGTH_LONG).show();
                break;
        }
    }

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package com.example.test;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.util.Log;

public class lifeCircleActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_life_circle);
        Log.d("lifecircle","-----onCreate----");
    }

    @Override
    protected void onStart() {
        super.onStart();
        Log.d("lifecircle","-----onStart----");
    }

    @Override
    protected void onResume() {
        super.onResume();
        Log.d("lifecircle","-----onResume----");
    }

    @Override
    protected void onPause() {
        super.onPause();
        Log.d("lifecircle","-----onPause----");
    }

    @Override
    protected void onStop() {
        super.onStop();
        Log.d("lifecircle","-----onStop----");
    }

    @Override
    protected void onRestart() {
        super.onRestart();
        Log.d("lifecircle","-----onRestart----");
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        Log.d("lifecircle","-----onDestroy----");
    }

}

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<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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:layout_height="match_parent"
    tools:context=".contentProviderActivity">

    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/cpbtn1"
        android:textSize="25sp"
        android:text="get_contacts"/>

    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/cpbtn2"
        android:text="getdata"
        android:textSize="25dp"
        app:layout_constraintTop_toBottomOf="@+id/cpbtn1"
        android:layout_marginTop="20dp"/>

</androidx.constraintlayout.widget.ConstraintLayout>

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#include<iostream>
using namespace std;
int main(){
    int t;
    cin>>t;
    while(t--) {
        int k;
        cin>>k;
        cout<<1<<" "<<k-1<<endl;
    }
    return 0;
}

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#include<bits/stdc++.h>
using namespace std;
int main()
{
	string s;
	cin>>s;
	if((s[0]=='A' and s[1]=='A' and s[2]=='A') or(s[0]=='B' and s[1]=='B' and s[2]=='B'))
	cout<<"No"<<endl;
	else cout<<"Yes"<<endl;
	return 0;
}