效果圖
layout布局
activity_clean_cache.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
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:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="cn.edu.nju.software.tongbaoshipper.controller.activity.CleanCacheActivity">
<RelativeLayout
android:id="@+id/clean_title"
android:layout_width="match_parent"
android:layout_height="45dp"
android:background="@color/background_blue">
<LinearLayout
android:id="@+id/clean_btn_back"
android:layout_width="@dimen/title_btn_width"
android:layout_height="match_parent"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:gravity="center">
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/back" />
</LinearLayout>
<TextView
android:id="@+id/cache_title"
style="@style/title_font"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:text="@string/clean_cache" />
</RelativeLayout>
<TextView
android:id="@+id/cache_size"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="10M"
android:textColor="@color/colorPrimary"
android:textSize="20pt"
android:layout_below="@+id/clean_title"
android:layout_centerHorizontal="true"
android:layout_marginTop="100dp"/>
<Button
android:id="@+id/button_clean"
android:background="@color/colorPrimary"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/clean_button"
android:textColor="@color/font_white"
android:layout_below="@+id/cache_size"
android:layout_centerHorizontal="true"
android:layout_marginTop="100dp"/>
</RelativeLayout>
activity實作代碼
我這裡activity是用kotlin代碼實作的,用java的可以自行轉換
CleanCacheActivity.kt
package cn.edu.nju.software.tongbaoshipper.controller.activity
import android.os.Bundle
import android.support.v7.app.AppCompatActivity
import android.widget.Button
import android.widget.LinearLayout
import android.widget.TextView
import cn.edu.nju.software.tongbaoshipper.R
import cn.edu.nju.software.tongbaoshipper.controller.utils.DataCleanManager
import cn.edu.nju.software.tongbaoshipper.controller.utils.GetFileSize
class CleanCacheActivity : AppCompatActivity() {
var cacheSize: String = "";
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_clean_cache)
val btnBack: LinearLayout = findViewById(R.id.clean_btn_back) as LinearLayout
btnBack.setOnClickListener { finish() }
val cachTextView: TextView = findViewById(R.id.cache_size) as TextView
cacheSize = GetFileSize.FormetFileSize(GetFileSize.getFileSize([email protected].cacheDir))
cachTextView.setText(cacheSize)
val btnClean: Button = findViewById(R.id.button_clean) as Button
btnClean.setOnClickListener {
DataCleanManager.cleanInternalCache([email protected])
cacheSize = GetFileSize.FormetFileSize(GetFileSize.getFileSize([email protected].cacheDir))
cachTextView.setText(cacheSize)
}
}
}
GetFileSize.java
package cn.edu.nju.software.tongbaoshipper.controller.utils;
import java.io.File;
import java.io.FileInputStream;
import java.text.DecimalFormat;
/**
* 作者 : motoon
* 日期 : 2017/5/28
* 版本 : v1.0
*/
public class GetFileSize {
public static long getFileSizes(File f) throws Exception{//取得檔案大小
long s=;
if (f.exists()) {
FileInputStream fis = null;
fis = new FileInputStream(f);
s= fis.available();
} else {
f.createNewFile();
System.out.println("檔案不存在");
}
return s;
}
// 遞歸
public static long getFileSize(File f)throws Exception//取得檔案夾大小
{
long size = ;
File flist[] = f.listFiles();
for (int i = ; i < flist.length; i++)
{
if (flist[i].isDirectory())
{
size = size + getFileSize(flist[i]);
} else
{
size = size + flist[i].length();
}
}
return size;
}
public static String FormetFileSize(long fileS) {//轉換檔案大小
DecimalFormat df = new DecimalFormat("#.00");
String fileSizeString = "";
if (fileS < ) {
if (fileS < ){
fileSizeString = + "B";
}else {
fileSizeString = df.format((double) fileS) + "B";
}
} else if (fileS < ) {
fileSizeString = df.format((double) fileS / ) + "K";
} else if (fileS < ) {
fileSizeString = df.format((double) fileS / ) + "M";
} else {
fileSizeString = df.format((double) fileS / ) + "G";
}
return fileSizeString;
}
public static long getlist(File f){//遞歸求取目錄檔案個數
long size = ;
File flist[] = f.listFiles();
size=flist.length;
for (int i = ; i < flist.length; i++) {
if (flist[i].isDirectory()) {
size = size + getlist(flist[i]);
size--;
}
}
return size;
}
public static void main(String args[])
{
GetFileSize g = new GetFileSize();
long startTime = System.currentTimeMillis();
try
{
long l = ;
String path = "C:\\WINDOWS";
File ff = new File(path);
if (ff.isDirectory()) { //如果路徑是檔案夾的時候
System.out.println("檔案個數 " + g.getlist(ff));
System.out.println("目錄");
l = g.getFileSize(ff);
System.out.println(path + "目錄的大小為:" + g.FormetFileSize(l));
} else {
System.out.println(" 檔案個數 1");
System.out.println("檔案");
l = g.getFileSizes(ff);
System.out.println(path + "檔案的大小為:" + g.FormetFileSize(l));
}
} catch (Exception e)
{
e.printStackTrace();
}
long endTime = System.currentTimeMillis();
System.out.println("總共花費時間為:" + (endTime - startTime) + "毫秒...");
}
}
DataCleanManager.java
/**
* 作者 : motoon
* 日期 : 2017/5/28
* 版本 : v1.0
*/
package cn.edu.nju.software.tongbaoshipper.controller.utils;
/* * 文 件 名: DataCleanManager.java
* * 描 述: 主要功能有清除内/外緩存,清除資料庫,清除sharedPreference,清除files和清除自定義目錄
* */
import android.content.Context;
import android.os.Environment;
import android.text.TextUtils;
import java.io.File;
import java.math.BigDecimal;
/** * 本應用資料清除管理器 */
public class DataCleanManager {
/**
* * 清除本應用内部緩存(/data/data/com.xxx.xxx/cache) * *
*
* @param context
*/
public static void cleanInternalCache(Context context) {
deleteFolderFile(String.valueOf(context.getCacheDir()),false);
}
/**
* * 清除本應用所有資料庫(/data/data/com.xxx.xxx/databases) * *
*
* @param context
*/
public static void cleanDatabases(Context context) {
deleteFilesByDirectory(new File("/data/data/"
+ context.getPackageName() + "/databases"));
}
/**
* * 清除本應用SharedPreference(/data/data/com.xxx.xxx/shared_prefs) *
*
* @param context
*/
public static void cleanSharedPreference(Context context) {
deleteFilesByDirectory(new File("/data/data/"
+ context.getPackageName() + "/shared_prefs"));
}
/**
* * 按名字清除本應用資料庫 * *
*
* @param context
* @param dbName
*/
public static void cleanDatabaseByName(Context context, String dbName) {
context.deleteDatabase(dbName);
}
/**
* * 清除/data/data/com.xxx.xxx/files下的内容 * *
*
* @param context
*/
public static void cleanFiles(Context context) {
deleteFilesByDirectory(context.getFilesDir());
}
/**
* * 清除外部cache下的内容(/mnt/sdcard/android/data/com.xxx.xxx/cache)
*
* @param context
*/
public static void cleanExternalCache(Context context) {
if (Environment.getExternalStorageState().equals(
Environment.MEDIA_MOUNTED)) {
deleteFilesByDirectory(context.getExternalCacheDir());
}
}
/**
* * 清除自定義路徑下的檔案,使用需小心,請不要誤删。而且隻支援目錄下的檔案删除 * *
*
* @param filePath
* */
public static void cleanCustomCache(String filePath) {
deleteFilesByDirectory(new File(filePath));
}
/**
* * 清除本應用所有的資料 * *
*
* @param context
* @param filepath
*/
public static void cleanApplicationData(Context context, String... filepath) {
cleanInternalCache(context);
cleanExternalCache(context);
cleanDatabases(context);
cleanSharedPreference(context);
cleanFiles(context);
if (filepath == null) {
return;
}
for (String filePath : filepath) {
cleanCustomCache(filePath);
}
}
/**
* * 删除方法 這裡隻會删除某個檔案夾下的檔案,如果傳入的directory是個檔案,将不做處理 * *
*
* @param directory
*/
private static void deleteFilesByDirectory(File directory) {
if (directory != null && directory.exists() && directory.isDirectory()) {
for (File item : directory.listFiles()) {
item.delete();
}
}
}
// 擷取檔案
//Context.getExternalFilesDir() --> SDCard/Android/data/你的應用的包名/files/ 目錄,一般放一些長時間儲存的資料
//Context.getExternalCacheDir() --> SDCard/Android/data/你的應用包名/cache/目錄,一般存放臨時緩存資料
public static long getFolderSize(File file) throws Exception {
long size = ;
try {
File[] fileList = file.listFiles();
for (int i = ; i < fileList.length; i++) {
// 如果下面還有檔案
if (fileList[i].isDirectory()) {
size = size + getFolderSize(fileList[i]);
} else {
size = size + fileList[i].length();
}
}
} catch (Exception e) {
e.printStackTrace();
}
return size;
}
/**
* 删除指定目錄下檔案及目錄
*
*/
public static void deleteFolderFile(String filePath, boolean deleteThisPath) {
if (!TextUtils.isEmpty(filePath)) {
try {
File file = new File(filePath);
if (file.isDirectory()) {// 如果下面還有檔案
File files[] = file.listFiles();
for (int i = ; i < files.length; i++) {
deleteFolderFile(files[i].getAbsolutePath(), true);
}
}
if (deleteThisPath) {
if (!file.isDirectory()) {// 如果是檔案,删除
file.delete();
} else {// 目錄
if (file.listFiles().length == ) {// 目錄下沒有檔案或者目錄,删除
file.delete();
}
}
}
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
/**
* 格式化機關
*
* @param size
* @return
*/
public static String getFormatSize(double size) {
double kiloByte = size / ;
if (kiloByte < ) {
return size + "Byte";
}
double megaByte = kiloByte / ;
if (megaByte < ) {
BigDecimal result1 = new BigDecimal(Double.toString(kiloByte));
return result1.setScale(, BigDecimal.ROUND_HALF_UP)
.toPlainString() + "KB";
}
double gigaByte = megaByte / ;
if (gigaByte < ) {
BigDecimal result2 = new BigDecimal(Double.toString(megaByte));
return result2.setScale(, BigDecimal.ROUND_HALF_UP)
.toPlainString() + "MB";
}
double teraBytes = gigaByte / ;
if (teraBytes < ) {
BigDecimal result3 = new BigDecimal(Double.toString(gigaByte));
return result3.setScale(, BigDecimal.ROUND_HALF_UP)
.toPlainString() + "GB";
}
BigDecimal result4 = new BigDecimal(teraBytes);
return result4.setScale(, BigDecimal.ROUND_HALF_UP).toPlainString()
+ "TB";
}
public static String getCacheSize(File file) throws Exception {
return getFormatSize(getFolderSize(file));
}
}
代碼寫完運作就OK啦!是不是很簡單哦~