Home button disable

Question

I do know that it is ill advice to take control of the HOME button for users. But I'm developing a android lockdown application for educational purposes. I was browsing the site and came upon this link on disabling the home button.

@override

public void onAttachedToWindow()
{  
       this.getWindow().setType(WindowManager.LayoutParams.TYPE_KEYGUARD);     
       super.onAttachedToWindow();  
}

Currently I'm using the above code to disable my home button, however I do notice that even though I have this in my onCreate

getWindow.setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN);

I am unable to remove my notification bar remove. Please advice.

Answer 1

you can disable power button! you can try this: Project: DisableAllButton

• Disable Search, Back key: in "DisableAllButton.java"

  @Override
  public boolean onKeyDown(int keyCode, KeyEvent event) {
      return false;
  }
  

• Disable Home key: in "DisableAllKey.java"

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

• Disable Powerkey: in "DisableAllKey.java"

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

• in AndroidManifest

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

• and set fullscreen in AndroidManifest

  <application android:icon="@drawable/icon" android:label="@string/app_name"
  android:theme="@android:style/Theme.NoTitleBar.Fullscreen">
  

done! :D.

Answer 2

check Android source code, View.java

public static final int STATUS_BAR_DISABLE_HOME = 0x00200000;

STATUS_BAR_DISABLE_HOME flag is hide from the standard api.

we can just use 0x00200000 to set system ui visibility ,as:

View decorView = getWindow().getDecorView();
decorView.setSystemUiVisibility(decorView.getSystemUiVisibility()|0x00200000);

but you should add

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

first, this permission only granted to system apps