What to do if the application is not installed

Models and Systems: HTC G3 Hero | Singapore 2.1ROM | 8G SD card (in fact, the solution is theoretically not subject to the model and system limitations, the principle should be the same, with the SD card does not matter ~)

System environment: Already root, has done APP2SD+,SD card is divided into two areas: a 512M ext partition (where the software is installed), a FAT32 partition of the remaining space

First of all, let's talk about the symptoms of a problem: three applications that have not been installed in the last period of time, whether installed from the market or with pea pods, show "Application not Installed" and use various uninstall tools, Software management tools and the system built in the program management can not find the relevant applications, even without the icon that is not, belong to thoroughly the bottom of the find, and then the re browser can not search, and other applications will be normal installation ~

Previous attempts to resolve the process (both invalid, lazy to see a friend can skip directly):

1, the first idea is that the system has a program residue, may be not removed clean caused can not be installed, so use the Re browser search program related keywords, to find the relevant files and directories all deleted, and then restart the installation program, the result is invalid;

2, think of the previous backup, so open titanium backup, find the relevant software, restore: The first choice is the program + data, show the restoration failed, and then select a separate restore program, prompted the restoration of success, but in the system did not see the successful restoration of the program, so was fooled (here I did not do the attempt to restart the system, Do not know if the restart system after the restoration will be effective, interested friends can try Kazakhstan ~);

3, no way, only Google, first found is the most successful way: "Storage mode to connect to the computer or use root Explorer to find the SD card directory under the. android_secure folder, There should be a smdl2tmp1.asec, may be other names, in short, with the normal program name format obviously different file, delete, install software again try ", but I either the system or SD card can not find the relevant directory and file, so this method for me is useless;

4, the second method : "If it is the PC end of the installation of the application prompts failed, please check that there is no Android phone to install the corresponding USB drive, the general use of 91 mobile phone assistant or Pea folder will automatically help you install the mobile phone driver", I was the phone tip failed, and my driver installed correctly , pea pods are also used normally, so this has nothing to do with me;

5, the third method : "Check the phone settings-application-unknown source is checked, otherwise it will lead to some non-electronic market-provided applications can not install", I checked, so this also has nothing to do with me;

6, the fourth method : "With the system with the program management to view the program on the SD card, and some programs are not color icon, the original is that these do not have the icon of the software in mischief, these do not have the icon of the software is not properly installed or uninstall incomplete software data, If you install again will be an error, now we use the system with the software management to uninstall them clean, install the software again will not be wrong ", but I use the system with the program management even any icon can not see, so this method is useless to me;

7, the fifth method : "Just delete/mnt/secure/asec/smdl2tmp1.asec (in the drive mode is: Removable disk/.android_secure/smdl2tmp1.asec), and then install it", This method is the first method of supplement, but unfortunately my system and Cary also have no mnt directory, so useless;

8, the sixth method : "Upgrade the installed program prompts the" application is not installed "a small number of software upgrades will appear, only uninstall the old version, and then install a new version," I can not find the uninstall, so it is useless;

9, the seventh method : "In the settings-development-allow the simulation site on the hook, ok le", this I hook up or useless;

10, the eighth way : "Mobile phone connected to the computer and then open 91 mobile phone assistant, install a random application, choose the installation path for mobile phone memory", I was 2.1 system, the software is installed in the "memory", so this is useless;

11, the Nineth method: "There is a part of the software signature changes, so can not cover the installation, directly remove the new version can be installed," the principle of the same as the method six, so the invalid for me;

12, the tenth method : "Directly restore factory settings", which I do not want to do a method, theoretically should be effective.

After all these attempts, the problem is still unresolved, that depressed ah, I must return to the factory? Hesitate repeatedly, have already started to reload, the result in search Android system installation Principle when incredibly I found a way to solve the problem that bothered me for a long time, the following we look at solution:

In fact, the installation of Android system is to copy the APK files to the app directory and give permissions, Backup is the APK file and related data files copied out, according to this principle, I did the following operations:

1, first download the application of the APK installation package into the SD card;

2, the APK file renamed as the form of com.xxx.xxx.apk (Contrast system app directory under the file name changes, pure Chinese or any other file name can be successful I did not test ~);

3, with the root of the re browser to the card in the APK file to move or copy to the system directory in the app directory (that is, you can see the other application icon that directory);

4, find you copied over the APK file, long Press the menu to select "Permission", the following figure to check the corresponding permissions and determine;

Read and write execution

User √√0

Group √00

Other √00

5, restart the phone (this step is very important, reboot after the system will search the application again);

6, how? Did you see the cute program icon again after the reboot? Open to try, all can be used normally ~ (do not think here is the end);

7, although the program is normal, but if the installation or upgrade again, before all the white do, will again become the original "application is not installed" state;

8, so in the normal use of the program, open any one of the program uninstall software, I use the depth of uninstall, find and uninstall;

9, after normal uninstall, this time you can rest assured that the reinstall, upgrade what will not appear "application is not installed."

At this point, this problem is a perfect solution, I hope that the "application is not installed" the trouble of the friends can help