I have got a splash screen activity which launches the main activity, and from the main activity I start a service, when I close the application, the service is still running, but when I relaunch it, it shows the splash screen again.
How can I make it appear only once?
Either use the solution above, or at least the part where I check if the application started the first time. But I guess you solved it already...
I prefer adding a Splash Screen Layout on top of my main_activity.xml. I detect the first start of the application by extending Application. If it´s the first start, I show my Splash-Screen while the UI is build in the background... (Use background threads if the ProgressBar lags!)
//Extend Application to save the value. You could also use getter/setter for this instead of Shared Preferences...
public class YourApplication extends Application {
public static final String YOUR_APP_STARTUP = "APP_FIRST_START";
@Override
public void onCreate() {
super.onCreate();
//set SharedPreference value to true
SharedPreferences mPreferences = PreferenceManager.getDefaultSharedPreferences(getApplicationContext());
SharedPreferences.Editor editor = mPreferences.edit();
editor.putBoolean(YOUR_APP_STARTUP, true);
editor.apply();
...
}
Check for your first start in your MainActivity
public class YourMainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//hide actionbar and other menu which could overlay the splash screen
getActionBar().hide();
setContentView(R.layout.activity_main);
Boolean firstStart = PreferenceManager.getDefaultSharedPreferences(getApplicationContext()).getBoolean(TVApplication.YOUR_APP_STARTUP, true);
if (firstStart) {
//First app start, show splash screen an hide it after 5000ms
final RelativeLayout mSplashScreen = (RelativeLayout) findViewById(R.id.splash_screen);
mSplashScreen.setVisibility(View.VISIBLE);
mSplashScreen.setAlpha(1.0f);
final FrameLayout mFrame = (FrameLayout) findViewById(R.id.frame_container);
mFrame.setAlpha(0.0f);
Handler handler = new Handler();
handler.postDelayed(new Runnable() {
@Override
public void run() {
Animation fadeOutAnimation = AnimationUtils.loadAnimation(getApplicationContext(),
R.anim.fade_out_animation);
fadeOutAnimation.setDuration(500);
fadeOutAnimation.setAnimationListener(new Animation.AnimationListener() {
@Override
public void onAnimationStart(Animation animation) {
mFrame.setAlpha(1.0f);
getActionBar().show();
}
@Override
public void onAnimationEnd(Animation animation) {
mSplashScreen.setVisibility(View.GONE);
}
@Override
public void onAnimationRepeat(Animation animation) {
}
});
mSplashScreen.startAnimation(fadeOutAnimation);
}
}, 5000); //<-- time of Splash Screen shown
} else {
((RelativeLayout) findViewById(R.id.splash_screen)).setVisibility(View.GONE);
getActionBar().show();
}
Insert the SplashScreen at top in your main.xml. I prefer RelativeLayout for that. In the example, SplashScreen is placed on to of a layout with the Navitgation Drawer, which we really love, don`t we?
//main_activity.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<android.support.v4.widget.DrawerLayout
android:id="@+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<!-- The main content view -->
<FrameLayout
android:id="@+id/frame_container"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<!-- The navigation drawer list -->
<ListView
android:id="@+id/slider_list"
android:layout_width="240dp"
android:layout_height="match_parent"
android:layout_alignParentTop="true"
android:layout_gravity="start"
android:background="@color/tvtv_background"
android:choiceMode="singleChoice"
android:divider="@drawable/nav_bar_divider"
android:dividerHeight="1dp"
android:listSelector="@android:color/transparent" />
</android.support.v4.widget.DrawerLayout>
<RelativeLayout
android:id="@+id/splash_screen"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_alignParentTop="true"
android:background="@color/tvtv_white"
android:visibility="visible" >
<ImageView
android:id="@+id/splash_screen_logo"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:paddingLeft="50dp"
android:paddingRight="50dp"
android:scaleType="fitCenter"
android:src="@drawable/ic_launcher" />
<TextView
android:id="@+id/splash_screen_text"
style="@style/TVTextBlueContent"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/splash_screen_logo"
android:layout_centerHorizontal="true"
android:padding="10dp"
android:text="Awesome splash shiat" />
<ProgressBar
android:id="@+id/splash_screen_loader"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/splash_screen_text"
android:layout_centerHorizontal="true"
android:clickable="false"
android:indeterminate="true" />
</RelativeLayout>
</RelativeLayout>
in your splash activity, you can check, whether your service is already running(for details see How to check if a service is running on Android?). if service is running, you can start main activity and finish splash activity immediately
