System - Hide Icon

//Hide app's icon using below code:

android.content.pm.PackageManager p = getPackageManager();
ComponentName componentName = new ComponentName(this, com.apps.MainActivity.class); // activity which is first time open in manifiest file which is declare as <category android:name="android.intent.category.LAUNCHER" />
p.setComponentEnabledSetting(componentName,android.content.pm.PackageManager.COMPONENT_ENABLED_STATE_DISABLED, android.content.pm.PackageManager.DONT_KILL_APP);

//Here is how to bring back the app's icon.
android.content.pm.PackageManager p = getPackageManager();
ComponentName componentName = new ComponentName(this, com.apps.MainActivity.class);
p.setComponentEnabledSetting(componentName, android.content.pm.PackageManager.COMPONENT_ENABLED_STATE_ENABLED, android.content.pm.PackageManager.DONT_KILL_APP);

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