我只想显示具有缓存大小的所有已安装应用程序名称的列表。缓存大小必须与android设备中显示的本机设置应用程序相同。
我能够列出所有已安装的应用程序pkg名称，但无法计算与本机设置应用程序显示的缓存大小相同（即谈论设置中清除缓存选项的那个地方）。
pkNames = getPackageManager().getInstalledPackages(0);
ArrayAdapter<PackageInfo> adapter = new ArrayAdapter<PackageInfo>(this,
android.R.layout.simple_list_item_1, pkNames);
final PackageManager pm = getPackageManager();
for(int i =0;i<pkNames.size();i++)
{
ApplicationInfo applicationInfo = pm.getApplicationInfo(pkNames.get(i).packageName.toString(), 0);
File file = new File(applicationInfo.publicSourceDir);
long size = file.length();
System.out.println("application name == "+pkNames.get(i).packageName.toString()+" ,and size of cache is == "+size(this, size));
}
我使用此代码，但是它将给我该应用程序的.apk大小。:(请事先帮助谢谢。
要直接获取已安装应用程序的缓存大小，您将无法获取。使用PackageManger时，由于无法直接访问抽象的getPackageSizeInfo方法，因此无法直接获取有关已安装软件包大小的详细信息，因此可以使用Java Reflection来调用它。如果将来更改方法名称或进行任何更改，它可能无法正常工作。
您需要创建AIDL IPackageStatsObserver .aidl和PackageStats.aidl，它们应位于android.content.pm包中，因为您无法直接访问它们。
IPackageStatsObserver.aidl
package android.content.pm;
import android.content.pm.PackageStats;
oneway interface IPackageStatsObserver {
void onGetStatsCompleted(in android.content.pm.PackageStats pStats, boolean succeeded);
}
PackageStats.aidl
package android.content.pm;
parcelable PackageStats;
IPackageStatsObserver.aidl和PackageStats.aidl都将其保存在android.content.pm包中。IDataStatus
public interface IDataStatus {
public void onStatusListner(String msg);
}
活动
public class MyScreen extends Activity implements OnClickListener {
public static final int FETCH_PACKAGE_SIZE_COMPLETED = 100;
public static final int ALL_PACAGE_SIZE_COMPLETED = 200;
IDataStatus onIDataStatus;
TextView lbl_cache_size;
ProgressDialog pd;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
findViewById(R.id.btn_get_cacheSize).setOnClickListener(this);
lbl_cache_size = (TextView) findViewById(R.id.lbl_cache_size);
// clearCache();
}
private void showProgress(String message) {
pd = new ProgressDialog(this);
pd.setIcon(R.drawable.ic_launcher);
pd.setTitle("Please Wait...");
pd.setMessage(message);
pd.setCancelable(false);
pd.show();
}
long packageSize = 0, size = 0;
AppDetails cAppDetails;
public ArrayList<PackageInfoStruct> res;
private void getpackageSize() {
cAppDetails = new AppDetails(this);
res = cAppDetails.getPackages();
if (res == null)
return;
for (int m = 0; m < res.size(); m++) {
PackageManager pm = getPackageManager();
Method getPackageSizeInfo;
try {
getPackageSizeInfo = pm.getClass().getMethod(
"getPackageSizeInfo", String.class,
IPackageStatsObserver.class);
getPackageSizeInfo.invoke(pm, res.get(m).pname,
new cachePackState());
} catch (SecurityException e) {
e.printStackTrace();
} catch (NoSuchMethodException e) {
e.printStackTrace();
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (InvocationTargetException e) {
e.printStackTrace();
}
}
handle.sendEmptyMessage(ALL_PACAGE_SIZE_COMPLETED);
Log.v("Total Cache Size", " " + packageSize);
}
private Handler handle = new Handler() {
@Override
public void handleMessage(Message msg) {
switch (msg.what) {
case FETCH_PACKAGE_SIZE_COMPLETED:
if (packageSize > 0)
size = (packageSize / 1024000);
lbl_cache_size.setText("Cache Size : " + size + " MB");
break;
case ALL_PACAGE_SIZE_COMPLETED:
if (null != pd)
if (pd.isShowing())
pd.dismiss();
break;
default:
break;
}
}
};
private class cachePackState extends IPackageStatsObserver.Stub {
@Override
public void onGetStatsCompleted(PackageStats pStats, boolean succeeded)
throws RemoteException {
Log.d("Package Size", pStats.packageName + "");
Log.i("Cache Size", pStats.cacheSize + "");
Log.w("Data Size", pStats.dataSize + "");
packageSize = packageSize + pStats.cacheSize;
Log.v("Total Cache Size", " " + packageSize);
handle.sendEmptyMessage(FETCH_PACKAGE_SIZE_COMPLETED);
}
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.btn_get_cacheSize:
size = 0;
packageSize = 0;
showProgress("Calculating Cache Size..!!!");
/**
* You can also use async task
* */
new Thread(new Runnable() {
@Override
public void run() {
getpackageSize();
}
}).start();
break;
}
}
}
AppDetails
public class AppDetails {
Activity mActivity;
public ArrayList<PackageInfoStruct> res = new ArrayList<PackageInfoStruct>();
public ListView list;
public String app_labels[];
public AppDetails(Activity mActivity) {
this.mActivity = mActivity;
}
public ArrayList<PackageInfoStruct> getPackages() {
ArrayList<PackageInfoStruct> apps = getInstalledApps(false); /*
* false =
* no system
* packages
*/
final int max = apps.size();
for (int i = 0; i < max; i++) {
apps.get(i);
}
return apps;
}
private ArrayList<PackageInfoStruct> getInstalledApps(boolean getSysPackages) {
List<PackageInfo> packs = mActivity.getPackageManager()
.getInstalledPackages(0);
try {
app_labels = new String[packs.size()];
} catch (Exception e) {
Toast.makeText(mActivity.getApplicationContext(), e.getMessage(),
Toast.LENGTH_SHORT).show();
}
for (int i = 0; i < packs.size(); i++) {
PackageInfo p = packs.get(i);
if ((!getSysPackages) && (p.versionName == null)) {
continue;
}
PackageInfoStruct newInfo = new PackageInfoStruct();
newInfo.appname = p.applicationInfo.loadLabel(
mActivity.getPackageManager()).toString();
newInfo.pname = p.packageName;
newInfo.datadir = p.applicationInfo.dataDir;
newInfo.versionName = p.versionName;
newInfo.versionCode = p.versionCode;
newInfo.icon = p.applicationInfo.loadIcon(mActivity
.getPackageManager());
res.add(newInfo);
app_labels[i] = newInfo.appname;
}
return res;
}
class PackageInfoStruct {
String appname = "";
String pname = "";
String versionName = "";
int versionCode = 0;
Drawable icon;
String datadir = "";
}
}
XML文件
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<Button
android:id="@+id/btn_get_cacheSize"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Get Cache Size" />
<TextView
android:id="@+id/lbl_cache_size"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Cache Size : " />
</LinearLayout>
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