How to add Logs in your Android Java code and check the logs in Android Studio? – Logs in Android Java Code

In this video it shows how to add Logs in Android Java Code and then check it in the Logcat in Android Studio IDE. It adds below Log statement in the code for demonstation.

Log.d("Counter Value", "Integer Value increased to " + i);

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Complete code:

package com.programmerworld.logsinandroidjavacode;

import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.TextView;

import androidx.activity.EdgeToEdge;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.graphics.Insets;
import androidx.core.view.ViewCompat;
import androidx.core.view.WindowInsetsCompat;

public class MainActivity extends AppCompatActivity {

    private int i = 0;
    private TextView textView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        EdgeToEdge.enable(this);
        setContentView(R.layout.activity_main);
        ViewCompat.setOnApplyWindowInsetsListener(findViewById(R.id.main), (v, insets) -> {
            Insets systemBars = insets.getInsets(WindowInsetsCompat.Type.systemBars());
            v.setPadding(systemBars.left, systemBars.top, systemBars.right, systemBars.bottom);

            textView = findViewById(R.id.textView);

            return insets;
        });
    }

    public void counterIncrement(View view){
        textView.setText(String.valueOf(++i));

        Log.d("Counter Value", "Integer Value increased to " + i);
    }
}

<?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:id="@+id/main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <TextView
        android:id="@+id/textView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="0"
        android:textSize="24sp"
        android:textStyle="bold"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.5"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.369" />

    <TextView
        android:id="@+id/textView2"
        android:layout_width="214dp"
        android:layout_height="66dp"
        android:layout_marginTop="169dp"
        android:onClick="counterIncrement"
        android:text="Total Count"
        android:textAlignment="center"
        android:textSize="34sp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.5"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

</androidx.constraintlayout.widget.ConstraintLayout>

Screenshots:

Logs statements printed in the Logcat:

2024-10-09 17:05:46.081 16048-16048 Counter Value           com...erworld.logsinandroidjavacode  D  Integer Value increased to 1
2024-10-09 17:05:46.429 16048-16048 Counter Value           com...erworld.logsinandroidjavacode  D  Integer Value increased to 2
2024-10-09 17:05:46.571 16048-16048 Counter Value           com...erworld.logsinandroidjavacode  D  Integer Value increased to 3
2024-10-09 17:05:46.716 16048-16048 Counter Value           com...erworld.logsinandroidjavacode  D  Integer Value increased to 4
2024-10-09 17:05:46.867 16048-16048 Counter Value           com...erworld.logsinandroidjavacode  D  Integer Value increased to 5
2024-10-09 17:06:14.339 16048-16048 Counter Value           com...erworld.logsinandroidjavacode  D  Integer Value increased to 6