how do I get file size of temp file in android?

Question

if I use openFileOutput() to create and write to a temp file how do I get filesize after I'm done writing to it?

Answer 1

I hope this can help you:

    File file = new File(selectedPath);     int file_size = Integer.parseInt(String.valueOf(file.length()/1024)); 

Where the String selectedPath is the path to the file whose file size you want to determine.

file.length() returns the length of the file in bytes, as described in the Java 7 Documentation:

Returns the length, in bytes, of the file denoted by this abstract pathname, or 0L if the file does not exist. Some operating systems may return 0L for pathnames denoting system-dependent entities such as devices or pipes.

Dividing by 1024 converts the size from bytes to kibibytes. kibibytes = 1024 bytes.

Answer 2

Kotlin Extension Solution

Add these somewhere, then call myFile.sizeInMb or whichever you need

val File.size get() = if (!exists()) 0.0 else length().toDouble() val File.sizeInKb get() = size / 1024 val File.sizeInMb get() = sizeInKb / 1024 val File.sizeInGb get() = sizeInMb / 1024 val File.sizeInTb get() = sizeInGb / 1024 

If you need a File from a String or Uri, try adding these

fun Uri.asFile(): File = File(toString())  fun String?.asUri(): Uri? {     try {         return Uri.parse(this)     } catch (e: Exception) {     }     return null } 

If you'd like to easily display the values as a string, these are simple wrappers. Feel free to customize the default decimals displayed

fun File.sizeStr(): String = size.toString() fun File.sizeStrInKb(decimals: Int = 0): String = "%.${decimals}f".format(sizeInKb) fun File.sizeStrInMb(decimals: Int = 0): String = "%.${decimals}f".format(sizeInMb) fun File.sizeStrInGb(decimals: Int = 0): String = "%.${decimals}f".format(sizeInGb)  fun File.sizeStrWithBytes(): String = sizeStr() + "b" fun File.sizeStrWithKb(decimals: Int = 0): String = sizeStrInKb(decimals) + "Kb" fun File.sizeStrWithMb(decimals: Int = 0): String = sizeStrInMb(decimals) + "Mb" fun File.sizeStrWithGb(decimals: Int = 0): String = sizeStrInGb(decimals) + "Gb"