Android App: BACK button to act like HOME button

My Android app use Twitter authentication to login. In this moment, always the user clicks on App icon, the App use the flow: 1) App icon >> 2) Login Screen >> 3) Twitter Authentication Screen >> 4) Main App Screen 1st Issue: The HOME button makes the flow (xRanky icon >> Main App Screen), ONLY after the smartphone is reseted on the first time. The HOME button has to make the flow (xRanky icon >> Main App Screen) WITHOUT reset the smartphone. 2) 2nd issue: I have tried to make the BACK button to act like HOME button (xRanky icon >> Main App Screen), but the BACK button was only disable when I put the code below in all activities: @Override public void onBackPressed() { moveTaskToBack(true); } DESCRIPTION OF THE JOB . After the 1st SUCCESSFUL Login and Twitter Authentication, when the user clicks on the BACK button OR HOME button (Android buttons), the App has to stay in background (NOT quit). . In this case, If the user clicks on the App icon again, the flow will be: 1) xRanky icon >> 4) Main App Screen The App: [login to view URL] ONLY place a bid if you understood the requirements and can make the job for the bid value. AUTOMATIC BID WILL BE DELETED Thanks