Android - 如何将我的应用程序安装到SD卡

Question

I created my android app. I installed my telephone. But it was saved my telephone. I want to save APP and DATABASE to my sd card. Because when people formatted telephone, app and db datas will not delete

Answer 1

1. In your manifest

    <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="YOUR_PACKAGE" android:installLocation="internalOnly" 

   android:installLocation can be changed to preferExternal for preference to external storage. But this doesn't gurantee the application will be install on external storage, as from the Android references

   The application prefers to be installed on the external storage (SD card). There is no guarantee that the system will honor this request. The application might be installed on internal storage if the external media is unavailable or full. Once installed, the user can move the application to either internal or external storage through the system settings.

   Read here for more information about manifest elements(as refered by a respected user below)

2. If the app data is stored as SharedPreference it will be automatically cleared on device format, so you may opt to save your preferences to External Storage from the application using custom preference files.

   Read here for ways to store data on android.