Add an application class in your project like that to prevent the full app from screen-shot (All Activity and Fragment around your app). This is the example project and below I mentioned the core code -
public class MyApplicationContext extends Application {
private Context context;
public void onCreate() {
super.onCreate();
context = getApplicationContext();
setupActivityListener();
}
private void setupActivityListener() {
registerActivityLifecycleCallbacks(new ActivityLifecycleCallbacks() {
@Override
public void onActivityCreated(Activity activity, Bundle savedInstanceState) {
activity.getWindow().setFlags(WindowManager.LayoutParams.FLAG_SECURE, WindowManager.LayoutParams.FLAG_SECURE); }
@Override
public void onActivityStarted(Activity activity) {
}
@Override
public void onActivityResumed(Activity activity) {
}
@Override
public void onActivityPaused(Activity activity) {
}
@Override
public void onActivityStopped(Activity activity) {
}
@Override
public void onActivitySaveInstanceState(Activity activity, Bundle outState) {
}
@Override
public void onActivityDestroyed(Activity activity) {
}
});
}
}