Code Java

package net.chezdom.cours.activitylifecycle;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;

import java.text.DateFormat;
import java.util.Date;

public class MainActivity extends Activity implements View.OnClickListener {

    private LinearLayout logbox;

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

        logbox=findViewById(R.id.logbox);
        Button b=findViewById(R.id.btest);
        b.setOnClickListener(this);
        b=findViewById(R.id.bquit);
        b.setOnClickListener(this);
        findViewById(R.id.binfo).setOnClickListener(this);;

        this.displayLog("onCreate");
    }

    private void displayLog(String txt) {
        Toast.makeText(getApplicationContext(),"from: "+txt, Toast.LENGTH_SHORT).show();

        String currentDateTimeString = DateFormat.getDateTimeInstance().format(new Date());

        TextView textView = new TextView(this);
        textView.setText(currentDateTimeString+": "+txt);
        logbox.addView(textView);
    }

    @Override
    public void onClick(View view) {
        if (view.getId()==R.id.btest)
            displayLog("Click on test button!");
        else if (view.getId()==R.id.bquit) {
            displayLog("Click on Quit button!");
            this.finishAffinity();
        }
        else if (view.getId()==R.id.binfo) {
                displayLog("Click on Info button!");
                Intent intent=new Intent(this,LifeCycleInfoActivity.class);
                startActivity(intent);
        }
    }

    @Override
    protected void onStart() {
        super.onStart();
        this.displayLog("onStart");
    }

    @Override
    protected void onRestart() {
        super.onRestart();
        this.displayLog("onRestart");
    }

    @Override
    protected void onResume() {
        super.onResume();
        this.displayLog("onResume");
    }

    @Override
    protected void onPause() {
        super.onPause();
        this.displayLog("onPause");
    }

    @Override
    protected void onStop() {
        super.onStop();
        this.displayLog("onStop");
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        this.displayLog("onDestroy");
    }
}

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