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android 查看文件夹大小 删除文件,Android Base64编码保存本地。查询文件夹大小以及删除...

發布時間:2024/3/7 Android 27 豆豆
生活随笔 收集整理的這篇文章主要介紹了 android 查看文件夹大小 删除文件,Android Base64编码保存本地。查询文件夹大小以及删除... 小編覺得挺不錯的,現在分享給大家,幫大家做個參考.

代碼如下

package com.example.file

import android.content.Context

import android.content.Intent

import android.graphics.Bitmap

import android.graphics.BitmapFactory

import android.net.Uri

import android.os.Bundle

import android.os.Environment

import android.util.Base64

import android.widget.Toast

import androidx.appcompat.app.AppCompatActivity

import kotlinx.android.synthetic.main.activity_main.*

import java.io.File

import java.io.FileOutputStream

import java.io.IOException

import java.text.SimpleDateFormat

import java.util.*

class MainActivity : AppCompatActivity() {

override fun onCreate(savedInstanceState: Bundle?) {

super.onCreate(savedInstanceState)

setContentView(R.layout.activity_main)

save.setOnClickListener {

savePicPhone(this, Base642Bitmap())

getLength()

}

delete.setOnClickListener {

delete()

}

}

fun Base642Bitmap(

str: String = "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"

): Bitmap {

val byte = Base64.decode(str, Base64.DEFAULT)

return BitmapFactory.decodeByteArray(byte, 0, byte.size)

}

@Synchronized

fun savePicPhone(context: Context, bmp: Bitmap) {

var fos: FileOutputStream? = null

val path: String = Environment.getExternalStorageDirectory().getPath()

try { // 獲取系統時間

val d = Date()

val f = SimpleDateFormat("yyyy-MM-dd HH:mm:ss")

val strDate: String = f.format(d)

val div = File(path, "/logo")

if (!div.exists()) {

div.mkdirs() // 不存在就創建

}

val file = File(div, strDate + "_picture.jpg")

fos = FileOutputStream(file)

val compress: Boolean = bmp.compress(Bitmap.CompressFormat.JPEG, 100, fos)

fos.flush()

// 發送更新圖庫廣播

if (null != file) {

val intent = Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE)

val uri: Uri = Uri.fromFile(file)

intent.setData(uri)

context.sendBroadcast(intent)

}

} catch (e: Exception) {

e.printStackTrace()

} finally {

if (fos != null) {

try {

fos.close()

} catch (e: IOException) {

e.printStackTrace()

}

fos = null

}

}

}

fun getLength() {

val path = Environment.getExternalStorageDirectory().path+"/picture"

val file = File(path)

var size: Long = 0L;

if (file.exists()) {

if (file.isDirectory) {

for (file1 in file.listFiles()) {

if(file1.name.contains("picture")){

size += file1.length()

}

}

}

}

Toast.makeText(this, "$size", Toast.LENGTH_SHORT).show()

}

fun delete(){

val path = Environment.getExternalStorageDirectory().path+"/picture"

val file = File(path)

if(file.exists()&&file.isDirectory){

for(file1 in file.listFiles()){

file1.delete()

}

}

getLength()

}

}

總結

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