logs + save state

MainActivity.java

package com.sunmeat.myapplication;

import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

import androidx.appcompat.app.AppCompatActivity;
public class MainActivity extends AppCompatActivity {

    String TAG = "life";
    int count = 0;

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

        Button b = findViewById(R.id.button1);
        b.setOnClickListener(new View.OnClickListener() {
                                 @Override
                                 public void onClick(View v) {
                                     count++;
                                     Toast.makeText(MainActivity.this,
                                             count + " Hello from handler!",
                                             Toast.LENGTH_SHORT).show();
                                 }
                             });

            Log.i(TAG, "onCreate");
    }

    @Override
    public void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);
        outState.putInt("count", count);
        Log.i(TAG, "onSaveInstanceState");
    }

    @Override
    public void onRestoreInstanceState(Bundle savedInstanceState) {
        super.onSaveInstanceState(savedInstanceState);
        count = savedInstanceState.getInt("count");
        Log.i(TAG, "onRestoreInstanceState");
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        Log.i(TAG, "onDestroy");
    }

    @Override
    protected void onRestart() {
        super.onRestart();
        Log.i(TAG, "onRestart");
    }

    @Override
    protected void onStart() {
        super.onStart();
        Log.i(TAG, "onStart");
    }

    @Override
    protected void onStop() {
        super.onStop();
        Log.i(TAG, "onStop");
    }

    @Override
    protected void onResume() {
        super.onResume();
        Log.i(TAG, "onResume");
    }

    @Override
    protected void onPause() {
        super.onPause();
        Log.i(TAG, "onPause");
    }
}