How to get total storage (memory) and used storage of the device in your Android App?

In this video it shows the code to get the storage information (data) from your Android App. It shows example of fetching and displaying total storage available in the device and used storage. It uses a TextView to display the information.

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Code:

package com.programmerworld.storageinfoinandroidapp;

import android.os.Bundle;
import android.os.Environment;
import android.os.StatFs;
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 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 buttonStorageInfo(View view){
        StatFs statFs = new StatFs(Environment.getDataDirectory().getPath());

        long blockSize = statFs.getBlockSizeLong();        // Size of each block
        long totalBlocks = statFs.getBlockCountLong();     // Total number of blocks
        long availableBlocks = statFs.getAvailableBlocksLong(); // Number of available blocks

        long totalStorage = blockSize * totalBlocks;       // Total internal storage in bytes
        long availableStorage = blockSize * availableBlocks; // Available internal storage in bytes
        long usedStorage = totalStorage - availableStorage; // Used internal storage in bytes

        textView.setText("Total Storage: " + formatSize(totalStorage) + "\n" +
                "Used Storage: " + formatSize(usedStorage));

    }


    // Helper function to format the size from bytes to readable format
    public String formatSize(long size) {
        String suffix = null;
        float fSize = size;

        if (fSize >= 1024) {
            suffix = "KB";
            fSize /= 1024;
            if (fSize >= 1024) {
                suffix = "MB";
                fSize /= 1024;
            }
            if (fSize >= 1024) {
                suffix = "GB";
                fSize /= 1024;
            }
        }

        StringBuilder resultBuffer = new StringBuilder(Float.toString(fSize));

        int commaOffset = resultBuffer.indexOf(".");
        if (commaOffset >= 0) {
            int decimals = 3;
            resultBuffer.setLength(commaOffset + decimals);
        }

        if (suffix != null) resultBuffer.append(suffix);
        return resultBuffer.toString();
    }
}

<?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="Hello World!"
        android:textSize="34sp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <Button
        android:id="@+id/button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="156dp"
        android:layout_marginTop="80dp"
        android:onClick="buttonStorageInfo"
        android:text="Storage Info"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

</androidx.constraintlayout.widget.ConstraintLayout>

Screenshots: