package cn.flightfeather.thirdappmodule.util.file
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import android.content.Context
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import android.graphics.Bitmap
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import android.graphics.BitmapFactory
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import android.media.MediaMetadataRetriever
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import android.net.Uri
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import android.os.Build
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import android.os.Environment
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import android.support.v4.content.FileProvider
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import cn.flightfeather.thirdappmodule.R
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import cn.flightfeather.thirdappmodule.util.DateUtil
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import cn.flightfeather.thirdappmodule.util.file.FileUtils.GB
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import cn.flightfeather.thirdappmodule.util.file.FileUtils.KB
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import cn.flightfeather.thirdappmodule.util.file.FileUtils.MB
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import io.reactivex.Observable
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import io.reactivex.android.schedulers.AndroidSchedulers
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import io.reactivex.schedulers.Schedulers
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import java.io.File
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import java.io.FileOutputStream
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import java.util.*
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import kotlin.math.round
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/**
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* @author riku
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* Date: 2019/6/11
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* 文件操作工具类
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*/
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object FileUtils {
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const val KB = 1024L
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const val MB = 1024 * KB
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const val GB = 1024 * MB
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//文档
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private val FILE_EXTENSION_LIST = listOf(
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"xls", "xlsx", "ppt", "pptx", "doc",
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"docx", "pdf", "html", "htm", "txt",
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"rar", "zip", "7z"
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)
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//图片
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private val IMAGE_EXTENSION_LIST = listOf(
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"png", "gif", "jpg", "jpeg"
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)
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//音视频
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val VIDEO_EXTENSION_LIST = listOf(
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"mp4", "mp3", "3gp", "m4a"
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)
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private val FILE_TYPE_TITLE_MAP = mapOf(
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Pair("xls", "EXCEL"),
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Pair("xlsx", "EXCEL"),
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Pair("doc", "WORD"),
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Pair("docx", "WORD"),
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Pair("pdf", "PDF"),
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Pair("ppt", "PPT"),
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Pair("pptx", "PPT")
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)
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private const val UNKNOWN = "OTHERS"
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val ROOT_PATH: String = Environment.getExternalStorageDirectory().absolutePath
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/**
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* 获取缓存目录
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*/
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fun getCacheDir(context: Context? = null): File {
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return File(Environment.getExternalStorageDirectory().absolutePath, "/TaiZhang/files/")
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}
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fun getAudioDir(): File {
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return File(Environment.getExternalStorageDirectory().absolutePath, "/TaiZhang/audio/")
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}
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/**
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* 压缩图片至JPG格式
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*/
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fun compress2JPG(context: Context, path: String): File {
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val file = File(path)
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val opts = BitmapFactory.Options()
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//将图片的长宽缩小为1/2
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opts.inSampleSize = 2
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val bm = BitmapFactory.decodeFile(file.absolutePath, opts)
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return compress2JPG(context, bm)
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}
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fun compress2JPG(context: Context, bitmap: Bitmap): File {
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val fileName = "${Date().time}.jpg"
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val outputFile =
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File(getCacheDir(context), "thumbnail${File.separator}$fileName")
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if (!outputFile.parentFile.exists()) {
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outputFile.parentFile.mkdirs()
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}
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// val opts = BitmapFactory.Options()
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// //将图片的长宽缩小为1/2
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// opts.inSampleSize = 2
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// val bm = BitmapFactory.decodeFile(file.absolutePath, opts)
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val normalSize = 1440
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val width: Int
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val height: Int
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if (bitmap.width >= bitmap.height) {
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width = normalSize
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height = normalSize * bitmap.height / bitmap.width
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} else {
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height = normalSize
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width = normalSize * bitmap.width / bitmap.height
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}
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val bmSmall = Bitmap.createScaledBitmap(bitmap, width, height, true)
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bmSmall.compress(Bitmap.CompressFormat.JPEG, 80, FileOutputStream(outputFile.absolutePath))
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bitmap.recycle()
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bmSmall.recycle()
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return outputFile
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}
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private fun getAllFile(path: String = ROOT_PATH, index: Int = 0, onFound: (fileItems: List<FileItem>) -> Unit) {
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val file = File(path)
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var files = emptyArray<File>()
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try {
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files = file.listFiles()
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} catch (e: Exception) {
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e.printStackTrace()
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}
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//获取失败
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// if (files.isEmpty()) {
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// onFound(emptyList())
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// }
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for (f in files) {
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if (f.isHidden) continue
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if (path != ROOT_PATH ||
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(f.path.contains("download", true)
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|| f.path.contains("android", true)
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|| f.path.contains("tencent", true)
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)
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) {
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//如果是文件目录，则继续查找
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if (f.isDirectory) {
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getAllFile(f.path, index + 1, onFound)
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} else if (getOfficeFileTitle(getExtensionName(f.name)) != UNKNOWN) {
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val updateTime = DateUtil.getYearToMinStr(Date(f.lastModified()))
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onFound(
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listOf(
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FileItem(f.name, f.path, updateTime, f.size())
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)
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)
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}
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}
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}
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//判断进入的第一层文件路径的所有文件遍历完成后，返回一个特定的对象表示查询结束
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if (index == 0) {
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onFound(
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listOf(
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FileItem("done", "done")
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)
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)
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}
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}
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/**
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* 获取文件路径下的所有文件列表
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*/
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fun getAllFiles(path: String = ROOT_PATH): Observable<List<FileItem>> = Observable.create<List<FileItem>> { emitter ->
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getAllFile(path) {
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emitter.onNext(it)
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}
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emitter.onComplete()
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}.subscribeOn(Schedulers.io())
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.observeOn(AndroidSchedulers.mainThread())
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/**
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* 获取文件路径下的所有文件列表
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*/
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fun showFileDir(path: String = ROOT_PATH): List<FileItem> {
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val fileListItems = mutableListOf<FileItem>()
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val file = File(path)
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var files = emptyArray<File>()
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try {
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files = file.listFiles()
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} catch (e: Exception) {
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e.printStackTrace()
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}
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//获取失败
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if (files.isEmpty()) {
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return emptyList()
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}
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//如果当前目录不是根目录
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// if (ROOT_PATH != path) {
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// fileListItems.add(FileItem("@1", ROOT_PATH))
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// fileListItems.add(FileItem("@2", file.parent))
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// }
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files.sortWith(compareBy({ !it.isDirectory }, { it.name }))
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//添加所有文件
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for (f in files) {
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if (!f.isHidden) {
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val updateTime = DateUtil.getYearToMinStr(Date(f.lastModified()))
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fileListItems.add(FileItem(f.name, f.path, updateTime, f.size(), f.list()?.size ?: 0))
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}
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}
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return fileListItems
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}
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/**
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* 获取文件扩展名
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*/
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fun getExtensionName(filename: String?): String {
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if (!filename.isNullOrEmpty()) {
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val dot = filename.lastIndexOf('.')
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if (dot > -1 && dot < filename.length - 1) {
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return filename.substring(dot + 1)
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}
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}
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return ""
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}
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/**
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* 获取文件名
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*/
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fun getFileName(path: String?): String {
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if (!path.isNullOrEmpty()) {
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val dot = path.lastIndexOf('/')
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if (dot > -1 && dot < path.length - 1) {
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return path.substring(dot + 1)
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}
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}
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return ""
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}
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/**
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* 获取文件类型对应的简称标题
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*/
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fun getOfficeFileTitle(extensionName: String): String =
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FILE_TYPE_TITLE_MAP[extensionName] ?: UNKNOWN
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fun getOfficeFileTitleByName(fileName:String):String =
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getOfficeFileTitle(getExtensionName(fileName))
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/**
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* 获取文件类型中文简称
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*/
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fun getFileTypeName(path: String?): String = when (getExtensionName(path)) {
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in FILE_EXTENSION_LIST -> "文档"
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in IMAGE_EXTENSION_LIST -> "图片"
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in VIDEO_EXTENSION_LIST -> "音视频"
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else -> "其他"
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}
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fun hasEnoughMemory(file: File): Boolean {
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return file.freeSpace > 50 * MB
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}
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/**
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* 获取视频缩略图
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*/
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fun getVideoBitmapObservable(context: Context, uri: String?): Observable<File> =
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Observable.create<File> { emitter ->
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val retriever = MediaMetadataRetriever()
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try {
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if (uri?.contains("http") == true) {
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retriever.setDataSource(uri, mutableMapOf<String, String>())
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} else {
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retriever.setDataSource(uri)
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}
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val bitmap = retriever.frameAtTime
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if (bitmap != null) {
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val b = compress2JPG(context, bitmap)
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emitter.onNext(b)
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}
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} catch (e: Exception) {
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emitter.onError(e)
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}
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emitter.onComplete()
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}.subscribeOn(Schedulers.io())
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fun getVideoBitmap(context: Context, uri: String?): File? {
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val retriever = MediaMetadataRetriever()
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try {
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if (uri?.contains("http") == true) {
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retriever.setDataSource(uri, mutableMapOf<String, String>())
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} else {
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retriever.setDataSource(uri)
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}
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val bitmap = retriever.frameAtTime
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if (bitmap != null) {
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compress2JPG(context, bitmap).let {
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return it
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}
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}
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} catch (e: Exception) {
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}
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return null
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}
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fun getUri(context: Context?, path: String?): Uri? {
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return getUri(context, File(path))
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}
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fun getUri(context: Context?, file: File): Uri? {
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return if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
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context?.let {
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FileProvider.getUriForFile(it, it.getString(R.string.file_provide), file)
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}
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} else {
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Uri.fromFile(file)
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}
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}
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fun parseToFileSize(length: Long): String {
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return when (length) {
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in 0..KB -> "$length B"
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in KB..MB -> "${round(length.toDouble().div(KB.toDouble()).times(100)).div(100.0)} K"
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in MB..GB -> "${round(length.toDouble().div(MB.toDouble()).times(100)).div(100.0)} M"
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else -> if (length >= GB) {
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"${round(length.toDouble().div(GB.toDouble()).times(100)).div(100.0)} G"
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} else {
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""
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}
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}
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}
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}
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/**
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* 拓展文件列表删除
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*/
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fun List<File>.delete() {
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this.forEach {
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it.delete()
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}
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}
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/**
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* 拓展获取文件大小
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*/
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fun File.size(): String {
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return when (val bytes = this.length()) {
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in 0..KB -> "$bytes B"
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in KB..MB -> "${round(bytes.toDouble().div(KB.toDouble()).times(100)).div(100)} K"
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in MB..GB -> "${round(bytes.toDouble().div(MB.toDouble()).times(100)).div(100)} M"
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else -> if (bytes >= GB) {
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"${round(bytes.toDouble().div(GB.toDouble()).times(100)).div(100)} G"
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} else {
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""
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}
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}
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}
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data class FileItem(
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val name: String,
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val path: String,
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val updateTime: String = "",
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val size: String = "",
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val listFileNum: Int = 0
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)
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