根据ActivityManager的getInstalledApplications方法获取手机中所有的应用程序,通过context.createPackageContext得到每个应用的Context对象,循环遍历getCacheDir和getExternalFilesDir中的所有文件 得到缓存文件大小,
long toatal = 0L;
final List<ApplicationInfo> packages = packageManager.getInstalledApplications(PackageManager.GET_META_DATA);
List<AppProcessInfo> list = new ArrayList<>();
for (ApplicationInfo appInfo : packages) {
AppProcessInfo processInfo = new AppProcessInfo(appInfo.processName, appInfo.uid, appInfo.uid);
processInfo.isSystem = (appInfo.flags & ApplicationInfo.FLAG_SYSTEM) != 0;
Drawable icon = appInfo.loadIcon(packageManager);
String appName = appInfo.loadLabel(packageManager).toString();
processInfo.icon = icon;
processInfo.appName = appName;
processInfo.packName = appInfo.packageName;
Context mContext = null;
try {
mContext = context.createPackageContext(appInfo.packageName, Context.CONTEXT_IGNORE_SECURITY);
// Context.getExternalFilesDir() --> SDCard/Android/data/你的应用的包名/files/
// 目录,一般放一些长时间保存的数据
// Context.getExternalCacheDir() --> SDCard/Android/data/你的应用包名/cache/
// 目录,一般存放临时缓存数据
processInfo.memory = ExternalUtil.getTotalCacheSize(Objects.requireNonNull(mContext));
list.add(processInfo);
if(processInfo.memory > 0){
String typeName = processInfo.isSystem ? "系统应用" : "本地应用";
final String content = typeName + processInfo.appName + "-Cache:" + ExternalUtil.size(processInfo.memory);
Log.d("ddd", content);
toatal += processInfo.memory;
final long finalToatal = toatal;
context.runOnUiThread(new Runnable() {
@Override
public void run() {
textTotal.setText(String.format("缓存总大小为 : %s", ExternalUtil.size(finalToatal)));
sb.append(content).append("\r\n");
textLog.setText(sb.toString());
}
});
}
} catch (PackageManager.NameNotFoundException e) {
e.printStackTrace();
}
}
/**
* 获取缓存值
*/
public static long getTotalCacheSize(Context context) {
long externalCacheSize = 0L;
long externalFileSize = 0L;
long internalCacheSize = 0L;
long internalFileSize = 0L;
internalCacheSize = getFolderSize(context.getCacheDir());
// internalFileSize = getFolderSize(context.getFilesDir());
if (Environment.MEDIA_MOUNTED.equals(Environment.getExternalStorageState())) {
externalCacheSize = getFolderSize(context.getExternalCacheDir());
// externalFileSize = getFolderSize(context.getExternalFilesDir(""));
}
return internalCacheSize + externalCacheSize + internalFileSize + externalFileSize;
}
/**
* 获取文件
*/
public static long getFolderSize(File file) {
long size = 0;
if (file != null) {
File[] fileList = file.listFiles();
if (fileList != null && fileList.length > 0) {
for (File value : fileList) {
// 如果下面还有文件
if (value.isDirectory()) {
size = size + getFolderSize(value);
} else {
size = size + value.length();
}
}
}
}
return size;
}
/**
* 将文件大小显示为GB,MB等形式
*/
public static String size(long size) {
if (size / (1024 * 1024 * 1024) > 0) {
float tmpSize = (float) (size) / (float) (1024 * 1024 * 1024);
DecimalFormat df = new DecimalFormat("#.##");
return "" + df.format(tmpSize) + "GB";
} else if (size / (1024 * 1024) > 0) {
float tmpSize = (float) (size) / (float) (1024 * 1024);
DecimalFormat df = new DecimalFormat("#.##");
return "" + df.format(tmpSize) + "MB";
} else if (size / 1024 > 0) {
return "" + (size / (1024)) + "KB";
} else
return "" + size + "B";
}