Black screen before Splash screen appear in android

Question

We know that when the app do some long process like downloading some information from internet it could show a splash screen before loading the application and when the app

Answer 1

Add this line in your AndroidManifest.xml to the Launcher Activity:

android:theme="@android:style/Theme.Translucent.NoTitleBar.Fullscreen

Answer 2

You can solve this bug by converting image as a brush(color).

Add new file xml(splash_bg.xml) file in the drawable folder, like this.

<?xml version="1.0" encoding="utf-8" ?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
   <item>
      <color android:color="@color/splash_bg_color"/>
   </item>
   <item>
        <bitmap
            android:src="@drawable/splash_screen"
            android:tileMode="disabled"
            android:gravity="center"/>
   </item>
</layer-list>

Now add a new style, and apply splash_bg.xml as a background color.

<style name="Theme.SplashBg" parent="android:Theme">
    <item name="android:windowBackground">@drawable/splash_bg</item>
    <item name="android:windowNoTitle">true</item>
    <item name="android:windowContentOverlay">@null</item>
</style>

Apply this new style to your main launcher activity or splash screen.

[Activity(Label = "label", MainLauncher = true, Theme = "@style/Theme.SplashBg")]
public class SplashScreenActivity : Activity

Answer 3

If you call some "heavy code" in onCreate the screen will appear black until it is done loading. You might consider using AsyncTask and make the onCreate handle setContentView etc, and make the AsyncTask handle "the heavy code".

Answer 4

the better solution to avoid this problem is using AsyncTask, here is a sample code that i use in one of my ListActivity:

 private class YoutubeTask extends AsyncTask<URL, Integer, String> {
     protected void onPreExecute() {
            super.onPreExecute();
            mLoadingProgress.startAnimation(mDisappear);
        mLoadingProgress.setVisibility(View.GONE);
            showDialogProgress();
    }

     protected String doInBackground(URL... url) {

         youtubeData = VersionParser.readFromUrl(url[0]);;

        try {

            JSONObject jsono = new JSONObject(youtubeData);
            JSONObject feed = jsono.getJSONObject("feed");
            JSONArray entry = feed.getJSONArray("entry");

            for(int i = 0 ; i < entry.length() ; i++ ){

                JSONObject item = entry.getJSONObject(i);

                JSONArray AUTHOR = item.getJSONArray(TAG_AUTHOR);
                JSONObject Author = AUTHOR.getJSONObject(0);
                JSONObject author = Author.getJSONObject("name");
                String author_name = author.getString(TAG_TITRE);

                JSONObject Statistics = item.getJSONObject("yt$statistics");
                String Views = Statistics.getString(TAG_VIEWS);

                JSONObject Media = item.getJSONObject("media$group");

                JSONObject MediaTitle = Media.getJSONObject("media$title");
                String title = MediaTitle.getString(TAG_TITRE);

                JSONObject DURATION = Media.getJSONObject("yt$duration");
                String duration = DURATION.getString(TAG_DURATION);

                JSONArray Thumbinail = Media.getJSONArray("media$thumbnail");
                JSONObject IMAGE = Thumbinail.getJSONObject(0);
                String image = IMAGE.getString(TAG_CONTENT);
                String id = image.substring(22,33);

                 map = new HashMap<String, String>();

                    map.put(TAG_TITRE , title ); 
                    map.put(TAG_ID , id );
                    map.put(TAG_DURATION , duration );
                    map.put(TAG_IMAGE , image);
                    map.put(TAG_VIEWS , Views );
                    map.put(TAG_AUTHOR , author_name);

                   CURRENCY.add(map);
                }


        } catch (JSONException e) {

            e.printStackTrace();
        }
            return null;
        }


     @Override
        protected void onPostExecute(String result) { 

             dismisDialogProgress(); 
             mListView.setVisibility(View.VISIBLE);
            mListView.startAnimation(mAppear);
            mAdapter = new MAdapter(youtubeSearch.this , CURRENCY);
            mListView.setSelector(R.drawable.home_bg);
            mListView.setAdapter(mAdapter);

             } 
    }

and inside the onCreate Methode implement this:

            @Override

    public void onCreate(Bundle savedInstanceState) {

        if (Build.VERSION.SDK_INT < 11)
        setTheme(android.R.style.Theme_Black_NoTitleBar);
    }
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);


    new YoutubeTask().execute(new URL("https://gdata.youtube.com/feeds/api/videos?q=Adele&max-results=15&v=2&alt=json"));
        }

Answer 5

Here's some food for thought; maybe you don't have a sizeable initialization delay in your application at all; you might in fact, be waiting for the instant run service.

From what I've experienced, the symptoms of this are that your application shows a lengthy black screen whilst initializing, but upon debugging you find that none of your Application/Activity's onCreate methods have yet to even be called whilst it's visible.

Answer 6

Add a theme with the background you are using to your application tag in the manifest file to prevent the black screen to be drawn.

theme.xml

<resources>
<!-- Base application theme is the default theme. -->
<style name="Theme" parent="android:style/Theme" />

<style name="Theme.MyAppTheme" parent="Theme">
    <item name="android:windowNoTitle">true</item>
    <item name="android:windowContentOverlay">@null</item>
    <item name="android:windowBackground">@drawable/my_app_background</item>

</style>
</resources>

AndroidManifest.xml

....
<application
        android:name="@string/app_name"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/Theme.MyAppTheme"
         >
....

Read why there is a black screen here