CODEWITHSUNDEEP
android
user597603
user597603

Reputation: 1571

How to programmatically clear application data

I am developing automated tests for an android application (using Robotium). In order to ensure the consistency and reliability of tests, I would like to start each test with clean state (of the application under test). In order to do so, I need to clear the app data. This can be done manually in Settings/Applications/Manage Applications/[My App]/Clear data

What is the recommended way to get this done programmatically?

Upvotes: 157

Views: 125663

Answers (10)

Bear_Wojtaz
Bear_Wojtaz

Reputation: 11

This way added by Sebastiano was OK, but it's necessary, when you run tests from i.e. IntelliJ IDE to add:

 try {
    // clearing app data
    Runtime runtime = Runtime.getRuntime();
    runtime.exec("adb shell pm clear YOUR_APP_PACKAGE_GOES HERE");

}

instead of only "pm package..."

and more important: add it before driver.setCapability(App_package, package_name).

Upvotes: 0

Tushar Saha
Tushar Saha

Reputation: 2106

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

public void onClick(View view) {

    Context context = getApplicationContext(); // add this line
    if (Build.VERSION_CODES.KITKAT <= Build.VERSION.SDK_INT) {
        ((ActivityManager) context.getSystemService(ACTIVITY_SERVICE))
            .clearApplicationUserData();
        return;
    }

Upvotes: 2

sromku
sromku

Reputation: 4683

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 ;)

Upvotes: 1

Ronak Poriya
Ronak Poriya

Reputation: 2489

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");
    }

Upvotes: 3

Jocke
Jocke

Reputation: 424

From API version 19 it is possible to call ActivityManager.clearApplicationUserData().

((ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE)).clearApplicationUserData();

Upvotes: 18

Sebastiano
Sebastiano

Reputation: 12339

Following up to @edovino's answer, the way of clearing all of an application's preferences programmatically would be

private void clearPreferences() {
    try {
        // clearing app data
        Runtime runtime = Runtime.getRuntime();
        runtime.exec("pm clear YOUR_APP_PACKAGE_GOES HERE");

    } catch (Exception e) {
        e.printStackTrace();
    }
}

Warning: the application will force close.

Upvotes: 37

Thomas Keller
Thomas Keller

Reputation: 6060

If you have just a couple of shared preferences to clear, then this solution is much nicer.

@Override
protected void setUp() throws Exception {
    super.setUp();
    Instrumentation instrumentation = getInstrumentation();
    SharedPreferences preferences = instrumentation.getTargetContext().getSharedPreferences(...), Context.MODE_PRIVATE);
    preferences.edit().clear().commit();
    solo = new Solo(instrumentation, getActivity());
}

Upvotes: 7

edovino
edovino

Reputation: 3325

You can use the package-manager tool to clear data for installed apps (similar to pressing the 'clear data' button in the app settings on your device). So using adb you could do:

adb shell pm clear my.wonderful.app.package

Upvotes: 176

Hare-Krishna
Hare-Krishna

Reputation: 1425

Check this code to:

@Override
protected void onDestroy() {
// closing Entire Application
    android.os.Process.killProcess(android.os.Process.myPid());
    Editor editor = getSharedPreferences("clear_cache", Context.MODE_PRIVATE).edit();
    editor.clear();
    editor.commit();
    trimCache(this);
    super.onDestroy();
}


public static void trimCache(Context context) {
    try {
        File dir = context.getCacheDir();
        if (dir != null && dir.isDirectory()) {
            deleteDir(dir);

        }
    } catch (Exception e) {
        // TODO: handle exception
    }
}


public static boolean deleteDir(File dir) {
    if (dir != null && dir.isDirectory()) {
        String[] children = dir.list();
        for (int i = 0; i < children.length; i++) {
            boolean success = deleteDir(new File(dir, children[i]));
            if (!success) {
                return false;
            }
        }
    }

    // <uses-permission
    // android:name="android.permission.CLEAR_APP_CACHE"></uses-permission>
    // The directory is now empty so delete it

    return dir.delete();
}

Upvotes: 9

Yilmaz Guleryuz
Yilmaz Guleryuz

Reputation: 9745

you can clear SharedPreferences app-data with this

Editor editor = 
context.getSharedPreferences(PREF_FILE_NAME, Context.MODE_PRIVATE).edit();
editor.clear();
editor.commit();

and for clearing app db, this answer is correct -> Clearing Application database

Upvotes: 22

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