How to hide application icon?

To Hide app icon from launcher programatically you can do this

    PackageManager packageManager = context.getPackageManager();    ComponentName componentName = new ComponentName(context,            LauncherActivity.class);    packageManager.setComponentEnabledSetting(componentName, PackageManager.COMPONENT_ENABLED_STATE_DISABLED,            PackageManager.DONT_KILL_APP);

For example, We want to disable camera-related activities if there is no camera.

Firstly, register receiver in manifest file, This receiver runs when BOOT_COMPLETED intent is received.

        <receiver android:name=".DisableCameraReceiver">            <intent-filter>                <action android:name="android.intent.action.BOOT_COMPLETED" />            </intent-filter>        </receiver>

Then create a receiver class

public class DisableCameraReceiver extends BroadcastReceiver {    private static final String TAG = "DisableCameraReceiver";    @Override    public void onReceive(Context context, Intent intent) {        // Disable camera-related activities if there is no camera.        boolean needCameraActivity = hasCamera();        if (!needCameraActivity) {            Log.i(TAG, "disable all camera activities");            ComponentName name = new ComponentName(context, "com.android.camera.Camera");            PackageManager pm = context.getPackageManager();            int enable_state = pm.getComponentEnabledSetting(name);            // We need the DONT_KILL_APP flag, otherwise we will be killed immediately because we are in the same app.            if (enable_state != PackageManager.COMPONENT_ENABLED_STATE_DISABLED) {               pm.setComponentEnabledSetting(name,                    PackageManager.COMPONENT_ENABLED_STATE_DISABLED,                    PackageManager.DONT_KILL_APP);            }        }    }}