My own App as Lockscreen in ANDROID

Question

Possible Duplicate:
android lock screen source code

I´ve created an app, that contains 2 activities. One is to setAPassword and the other is to realize the login. How can i place this App as LockScreen in Android? It should permanentely run.

There is a similar question here http://stackoverflow.com/questions/2140964/android-lock-screen-source-code — sherif, Apr 17 '12 at 09:56

Rohit Sharma · Answer 1 · 2012-04-17T09:42:40.183

2

Just a guess of mine

disable back key
disable home key
No menu
Listen Boot Start of device and launch your screen again
only on successful login call finish()

for task 1,2,3 search stackoverflow . They are there for sure..

Also there are option in android for making your own home screen/ launcher screen. for e.g go_launcher app in android

for disabling home key try this full activity code is

package com.lockscreen;

import android.app.Activity;
import android.app.KeyguardManager;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.WindowManager;

public class LockScreenActivity extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    KeyguardManager keyguardManager = (KeyguardManager) getSystemService(Activity.KEYGUARD_SERVICE);
    KeyguardManager.KeyguardLock lock = keyguardManager
            .newKeyguardLock(KEYGUARD_SERVICE);
    lock.disableKeyguard();

}

@Override
public void onBackPressed() {

}

@Override
public void onAttachedToWindow() {
    // TODO Auto-generated method stub
    this.getWindow().setType(WindowManager.LayoutParams.TYPE_KEYGUARD);
    super.onAttachedToWindow();
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {

    menu.add("Exit");
    return super.onCreateOptionsMenu(menu);
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {

    if (item.getTitle().equals("Exit")) {
        finish();
        System.runFinalizersOnExit(true);
        System.exit(0);
    }
    return super.onOptionsItemSelected(item);
}

}

manifest needs permission

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

edited Apr 17 '12 at 09:42

answered Apr 17 '12 at 09:04

Rohit Sharma

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will like to know how 2nd can b done. – Its not blank Apr 17 '12 at 09:21
ahhhhh i hate -1. god bless me with some multiple +1 – Rohit Sharma Apr 17 '12 at 09:36
@vincent check the code section – Rohit Sharma Apr 17 '12 at 09:36
as far as I know you cant disable the home key unless your app is a Homescreen app – sherif Apr 17 '12 at 09:53
@sherif try the code i wrote above – Rohit Sharma Apr 17 '12 at 10:06
@sherif : i agree,back press can be easily manipulated but not home... – Its not blank Apr 17 '12 at 10:06
sherif and @Vincent try the code and let me know what you saw. – Rohit Sharma Apr 17 '12 at 10:09
http://stackoverflow.com/a/3594553/1075066 from here i found http://stackoverflow.com/a/3219978/1075066 – Its not blank Apr 17 '12 at 10:15
Fortunately, your "block the home key" solution no longer works, as of Android 4.0. – CommonsWare Apr 17 '12 at 11:14
@CommonsWare we can start service in background to check our screen is in foreground or not. if not bring it up. – Rohit Sharma Apr 17 '12 at 14:27
we can also go for a server heart beat mechanism send a push if heart beat is not received to re launch app. there must be some hack for 4.0 too. – Rohit Sharma Apr 17 '12 at 14:30
i can also think of calling new activity in onPause onStop or onDestroy. will give it a shot too – Rohit Sharma Apr 17 '12 at 14:32
i know these are not good steps from the perspective of this platform policies.but bringing these points in front will lead to its fix in newer versions :) – Rohit Sharma Apr 17 '12 at 14:34
2

@Javanator: Fortunately, all your other techniques are trivially defeated as well, to the extent they would ever work reliably in the first place. I can teach my nephews how to get past these so-called "lockscreens", and my nephews are aged 9 and 6. – CommonsWare Apr 17 '12 at 15:03
8

@CommonsWare fortunately many didn't get uncle like you so they won't get past these so-called "lockscreens" even if they are aged 90 or 60. – Rohit Sharma Apr 17 '12 at 17:05

My own App as Lockscreen in ANDROID

1 Answers1