android怎么获取自身apk大小

下面就看看怎么获取自身app的大小的。

注：此处只是获取自己的apk的大小。

首先我们需要的是权限：

<uses-permission android:name="android.permission.GET_PACKAGE_SIZE"/>

接下来当然是获取PackageManager了啊：PackageManager mPackageManager=getPackageManager()

try {

PackageInfo pInfo=mPackageManager.getPackageInfo(getPackageName(),0)

mPackageName=pInfo.packageName

} catch (NameNotFoundException e) {

e.printStackTrace()

}

在接下来

//返回一个安装到设备上的所有应用程序包列表

List<ApplicationInfo>installList=mPackageManager.getInstalledApplications(PackageManager.GET_UNINSTALLED_PACKAGES)

for (int i = 0i <installList.size()i++) {

ApplicationInfo info=installList.get(i)

if(info.packageName.equals(mPackageName)){//如果这个packagename和当前apk的packagename一样，你就可以获取它的大小了。

String dir=info.publicSourceDir

int size=Integer.valueOf((int)new File(dir).length())

BigDecimal apkSize=parseApkSize(size)

tvSize.setText("apk大小:"+apkSize+"M")//最后显示的应用程序大小了

}

}

java中保留两位小数：private BigDecimal parseApkSize(int size) {

BigDecimal bd = new BigDecimal((double)size/(1024*1024))

BigDecimal setScale = bd.setScale(2, BigDecimal.ROUND_DOWN)

return setScale

File root = Environment.getRootDirectory()

StatFs sf = new StatFs(root.getPath())

long blockSize = sf.getBlockSize()

long blockCount = sf.getBlockCount()

long availCount = sf.getAvailableBlocks()

Log.d("TAG", "block大小:" + blockSize + ",block数目:" + blockCount + ",总大小:"+ blockSize * blockCount / (1024 * 1024) + "MB")

Log.d("TAG","可用的block数目：:" + availCount + ",可用大小:" + availCount * blockSize / (1024 * 1024)+ "MB")

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