I'm new here and I've searched for questions to help me but I have no clear answers.
I need to make an application to block other applications on the phone. I've seen several on the market but I want to make one. is there any way of knowing when a user tries to open an application and bring forward an activity? (to put the password).
I tried with FileObserver, but only works with files and directories (obviously). Could I make a listener that captures the Intent of the other applications before starting?
I apologize for my english and I appreciate your help!
Source: Tips4all
No you cannot know when another application is launched without some kind of hack.
ReplyDeleteThis is because application launches are not broadcasted.
What you can do is creating a service running on fixed intervals , say 1000 milliseconds, that checks what non system application is on front. Kill that app and from the service pop a password input box. If that password is correct relaunch that application
Here is some code sample
timer = new Timer();
timer.scheduleAtFixedRate(new TimerTask() {
public void run() {
List<RunningAppProcessInfo> appProcesses= activityManager.getRunningAppProcesses();
for (RunningAppProcessInfo appProcess : appProcesses) {
try {
if (appProcess.importance == RunningAppProcessInfo.IMPORTANCE_FOREGROUND) {
if (!lastFrontAppPkg.equals((String) appProcess.pkgList[0])) {
apkInfo = ApkInfo.getInfoFromPackageName(appProcess.pkgList[0], mContext);
if (apkInfo == null || (apkInfo.getP().applicationInfo.flags && ApplicationInfo.FLAG_SYSTEM) == 1) {
// System app continue;
} else if (((apkInfo.getP().versionName == null)) || (apkInfo.getP().requestedPermissions == null)) {
//Application that comes preloaded with the device
continue;
} else {
lastFrontAppPkg = (String) appProcess.pkgList[0];
}
//kill the app
//Here do the pupop with password to launch the lastFrontAppPkg if the pass is correct
}
}
}
} catch (Exception e) {
//e.printStackTrace();
}
}
}
}, 0, 1000);
And here is the ApkInfo.getInfoFromPackageName()
/**
* Get the ApkInfo class of the packageName requested
*
* @param pkgName
* packageName
* @return ApkInfo class of the apk requested or null if package name
* doesn't exist
* @see ApkInfo
*/
public static ApkInfo getInfoFromPackageName(String pkgName,
Context mContext) {
ApkInfo newInfo = new ApkInfo();
try {
PackageInfo p = mContext.getPackageManager().getPackageInfo(
pkgName, PackageManager.GET_PERMISSIONS);
newInfo.appname = p.applicationInfo.loadLabel(
mContext.getPackageManager()).toString();
newInfo.pname = p.packageName;
newInfo.versionName = p.versionName;
newInfo.versionCode = p.versionCode;
newInfo.icon = p.applicationInfo.loadIcon(mContext
.getPackageManager());
newInfo.setP(p);
} catch (NameNotFoundException e) {
e.printStackTrace();
return null;
}
return newInfo;
}
That service that checks every second will drain your battery in a couple hours.
ReplyDeleteWouldn't it be better to make a launcher / home app?