Disable Android home, back, and active apps buttons

Before you get totally into this post, I would like to warn you regarding the use of these functionalities, because they aren't user-friendly and Android Play Store wouldn’t approve of these unless you have a very strong reason.

Photo by Suika Ibuki on Unsplash

Active Apps/ Reorder Apps button

Add the following permission to AndroidManifest.xml

<uses-permission android:name="android.permission.REORDER_TASKS" />

The following to the Activity

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

        ActivityManager activityManager = (ActivityManager) getApplicationContext()
                .getSystemService(Context.ACTIVITY_SERVICE);

        activityManager.moveTaskToFront(getTaskId(), 0);
}

Home Button

<category android:name="android.intent.category.LAUNCHER" />
        <category android:name="android.intent.category.HOME" />
        <category android:name="android.intent.category.DEFAULT" />

Back Button

@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
    // Do nothing or catch the keys you want to block
}

References

Home button disable

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Prady | @pradyumna_d | “File Your Cryptocurrency Taxes Using BearTax!”