Clear cache in android application programmatically kotlin

What is the recommended way to get this done programmatically?

The only possible option is to run ADB command adb shell pm clear package before the test. The biggest problem is that it's kind of headache combining tests execution and shell commands.

However, we (at Mediafe) came with some solution that can work for you on regular unrooted device. All you need to do is to add an annotation. All the rest is done by running simple bash script.

Just add @ClearData annotation before ANY of your tests and tada ????, ADB clear command will be executed before the test execution.

This is an example of such test:

@Test @ClearData public void someTest() { // your test }

The idea is as follows

1. Read all tests by using adb shell am instrument -e log true
2. Build execution plan by parsing the output from (1)
3. Run the execution plan line by line

Using the same idea these are all options you can easily support:

• Clear data
• Clear notification bar
• Parameterize
• Filter and run by tags

Use only annotations. Like this:

@Test @ClearData @Tags(tags = {"sanity", "medium"}) @Parameterized.Repeat(count = 3) public void myTest() throws Exception { String param = params[index]; // ... }

Bonus! ???? For each failed test:

• Collect Logcat + stacktrace
• Record video (mp4)
• Dump DB (sqlite)
• Dump default shared preferences (xml)
• Collect dumpsys files like: battery, netstats and other.

In general, it's easy to add more options, since the tests are executed one by one from bash script rather than from gradle task.

???? The full blog post: https://medium.com/medisafe-tech-blog/running-android-ui-tests-53e85e5c8da8

???? The source code with examples: https://github.com/medisafe/run-android-tests

Hope this answers 6 years question ;)

if android version is above kitkat you may use this as well

if (Build.VERSION_CODES.KITKAT <= Build.VERSION.SDK_INT) { ((ActivityManager) context.getSystemService(ACTIVITY_SERVICE)) .clearApplicationUserData(); return; }

This solution has really helped me :

By using below two methods we can clear data programatically

public void clearApplicationData() { File cacheDirectory = getCacheDir(); File applicationDirectory = new File(cacheDirectory.getParent()); if (applicationDirectory.exists()) { String[] fileNames = applicationDirectory.list(); for (String fileName : fileNames) { if (!fileName.equals("lib")) { deleteFile(new File(applicationDirectory, fileName)); } } } } public static boolean deleteFile(File file) { boolean deletedAll = true; if (file != null) { if (file.isDirectory()) { String[] children = file.list(); for (int i = 0; i < children.length; i++) { deletedAll = deleteFile(new File(file, children[i])) && deletedAll; } } else { deletedAll = file.delete(); } } return deletedAll; }

The Simplest way to do this is

private void deleteAppData() { try { // clearing app data String packageName = getApplicationContext().getPackageName(); Runtime runtime = Runtime.getRuntime(); runtime.exec("pm clear "+packageName); } catch (Exception e) { e.printStackTrace(); } }

This will clear the data and remove your app from memory. It is equivalent to clear data option under Settings --> Application Manager --> Your App --> Clear data.

This will remove the data completely as well as force close the app

Using Context,We can clear app specific files like preference,database file. I have used below code for UI testing using Espresso.

@Rule public ActivityTestRule<HomeActivity> mActivityRule = new ActivityTestRule<>( HomeActivity.class); public static void clearAppInfo() { Activity mActivity = testRule.getActivity(); SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(mActivity); prefs.edit().clear().commit(); mActivity.deleteDatabase("app_db_name.db"); }