Enable/disable an activity programmatically

Question

I have an activity in in my app which I have kept as

android:enabled="false"

now I want that when a button is clicked it should get changer to

android:enabled="true"

How can I do this?

Answer 1

Use PackageManager and setComponentEnabledSetting() to enable or disable any component within your app: activity, service, etc.

Answer 2

Here's an example how to enable/disable an Activity:

    PackageManager pm = getPackageManager(); 
    pm.setComponentEnabledSetting(new ComponentName(this, com.packagename.MyActivity.class),
                                  PackageManager.COMPONENT_ENABLED_STATE_DISABLED, PackageManager.DONT_KILL_APP);

    pm.setComponentEnabledSetting(new ComponentName(this, com.packagename.MyActivity.class),
                                  PackageManager.COMPONENT_ENABLED_STATE_ENABLED, PackageManager.DONT_KILL_APP);

Answer 3

Here's a nice way to do it:

  public static void setActivityEnabled(Context context,final Class<? extends Activity> activityClass,final boolean enable)
    {
    final PackageManager pm=context.getPackageManager();
    final int enableFlag=enable ? PackageManager.COMPONENT_ENABLED_STATE_ENABLED : PackageManager.COMPONENT_ENABLED_STATE_DISABLED;
    pm.setComponentEnabledSetting(new ComponentName(context,activityClass),enableFlag,PackageManager.DONT_KILL_APP);
    }

example usage:

setActivityEnabled(this,SomeActivity.class,false);