get File Size - Android java.io

Android examples for java.io:File Size

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Description

get File Size

Demo Code

import android.app.Activity;
import android.content.Context;
import android.content.CursorLoader;
import android.content.Intent;
import android.database.Cursor;
import android.net.Uri;
import android.os.Build;
import android.os.Environment;
import android.provider.MediaStore;
import android.text.TextUtils;
import java.io.BufferedReader;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileFilter;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;

public class Main{


    public static String getFileSize(File file) {
        FileInputStream fis = null;
        try {/*w  w w. ja v  a 2s  . c o  m*/
            fis = new FileInputStream(file);
            int length = fis.available();
            if (length >= GB) {
                return String.format("%.2f GB", length * 1.0 / GB);
            } else if (length >= MB) {
                return String.format("%.2f MB", length * 1.0 / MB);
            } else {
                return String.format("%.2f KB", length * 1.0 / KB);
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                fis.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return "unknown;
    }
    /**
     * get file size
     * <ul>
     * <li>if path is null or empty, return -1</li>
     * <li>if path exist and it is a file, return file size, else return -1</li>
     * <ul>
     *
     * @return returns the length of this file in bytes. returns -1 if the file
     * does not exist.
     */
    public static long getFileSize(String path) {
        if (TextUtils.isEmpty(path)) {
            return -1;
        }

        File file = new File(path);
        return (file.exists() && file.isFile() ? file.length() : -1);
    }

}

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