Check if application is on its first run [duplicate]

Answer 1

    import java.io.File;
    import java.io.FileOutputStream;
    import java.io.IOException;
    import java.io.RandomAccessFile;
    import java.util.UUID;

    import android.content.Context;

    public class Util {
        // ===========================================================
        //
        // ===========================================================

        private static final String INSTALLATION = "INSTALLATION";

        public synchronized static boolean isFirstLaunch(Context context) {
            String sID = null;
            boolean launchFlag = false;
            if (sID == null) {
                File installation = new File(context.getFilesDir(), INSTALLATION);
                try {
                    if (!installation.exists()) {
                    launchFlag = true;                          
                        writeInstallationFile(installation);
                    }
                    sID = readInstallationFile(installation);

                } catch (Exception e) {
                    throw new RuntimeException(e);
                }
            }
            return launchFlag;
        }

        private static String readInstallationFile(File installation) throws IOException {
            RandomAccessFile f = new RandomAccessFile(installation, "r");// read only mode
            byte[] bytes = new byte[(int) f.length()];
            f.readFully(bytes);
            f.close();

            return new String(bytes);
        }

        private static void writeInstallationFile(File installation) throws IOException {
            FileOutputStream out = new FileOutputStream(installation);
            String id = UUID.randomUUID().toString();
            out.write(id.getBytes());
            out.close();
        }
    }

> Usage (in class extending android.app.Activity)

Util.isFirstLaunch(this);

Answer 2

I'm not sure it's good way to check it. What about case when user uses button "clear data" from settings? SharedPreferences will be cleared and you catch "first run" again. And it's a problem. I guess it's better idea to use InstallReferrerReceiver.

Answer 3

This might help you

public class FirstActivity extends Activity {

    SharedPreferences sharedPreferences = null;
    Editor editor;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_login);

        sharedPreferences = getSharedPreferences("com.myAppName", MODE_PRIVATE);
    }

    @Override
    protected void onResume() {
        super.onResume();

        if (sharedPreferences.getBoolean("firstRun", true)) {
         //You can perform anything over here. This will call only first time
                 editor = sharedPreferences.edit();
                 editor.putBoolean("firstRun", false)
                 editor.commit();

        }
    }
}

Answer 4

The following is an example of using SharedPreferences to achieve a 'forWhat' check.

    preferences = PreferenceManager.getDefaultSharedPreferences(context);
    preferencesEditor = preferences.edit();
public static boolean isFirstRun(String forWhat) {
    if (preferences.getBoolean(forWhat, true)) {
        preferencesEditor.putBoolean(forWhat, false).commit();
        return true;
    } else {
        return false;
    }
}

Answer 5

The accepted answer doesn't differentiate between a first run and subsequent upgrades. Just setting a boolean in shared preferences will only tell you if it is the first run after the app is first installed. Later if you want to upgrade your app and make some changes on the first run of that upgrade, you won't be able to use that boolean any more because shared preferences are saved across upgrades.

This method uses shared preferences to save the version code rather than a boolean.

import com.yourpackage.BuildConfig;
...

private void checkFirstRun() {

    final String PREFS_NAME = "MyPrefsFile";
    final String PREF_VERSION_CODE_KEY = "version_code";
    final int DOESNT_EXIST = -1;

    // Get current version code
    int currentVersionCode = BuildConfig.VERSION_CODE;

    // Get saved version code
    SharedPreferences prefs = getSharedPreferences(PREFS_NAME, MODE_PRIVATE);
    int savedVersionCode = prefs.getInt(PREF_VERSION_CODE_KEY, DOESNT_EXIST);

    // Check for first run or upgrade
    if (currentVersionCode == savedVersionCode) {

        // This is just a normal run
        return;

    } else if (savedVersionCode == DOESNT_EXIST) {

        // TODO This is a new install (or the user cleared the shared preferences)

    } else if (currentVersionCode > savedVersionCode) {

        // TODO This is an upgrade
    }

    // Update the shared preferences with the current version code
    prefs.edit().putInt(PREF_VERSION_CODE_KEY, currentVersionCode).apply();
}

You would probably call this method from onCreate in your main activity so that it is checked every time your app starts.

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        checkFirstRun();
    }

    private void checkFirstRun() {
        // ...
    }
}

If you needed to, you could adjust the code to do specific things depending on what version the user previously had installed.

Idea came from this answer. These also helpful:

• How can you get the Manifest Version number from the App's (Layout) XML variables?
• User versionName value of AndroidManifest.xml in code

If you are having trouble getting the version code, see the following Q&A:

• How to get the build/version number of your Android application?

Answer 6

There is no way to know that through the Android API. You have to store some flag by yourself and make it persist either in a SharedPreferenceEditor or using a database.

If you want to base some licence related stuff on this flag, I suggest you use an obfuscated preference editor provided by the LVL library. It's simple and clean.

Regards, Stephane