Android: showing blank screen after backing from intent

Question

What I want to do is pretty simple. I want app to launch sms app with pre-writen recipient. I made a new Android Application Project and used this code to lauch sms app. It works perfectly until I hit back button. It closes the sms app and then shows a blank screen enter image description here .

My code looks like:

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    Intent smsIntent = new Intent(Intent.ACTION_VIEW);
    smsIntent.setType("vnd.android-dir/mms-sms");
    smsIntent.putExtra("address", "0123456789");
    startActivity(smsIntent);
}

I thought it has something to do with a layout and it starts a blank activity (?) at the start of the app so i tried to comment out the setting of a layout //setContentView(R.layout.activity_main);. It didn't help.

I also tried to override onBackPressed() which also didn't help.

@Override
public void onBackPressed()
{
    finish();
    System.exit(0);
}

Is it possible to disable showing of the blank screen ?

do you want to show the blank screen or not ? if yes then what exactly you want to have on this screen ? — Umair, Sep 15 '14 at 10:49
Do you know that `System.exit(0);` is probably the worst thing you can do to your app? It will screw everything up and I mean EVERYTHING. Android doesn't work like a normal java application. You as a developer do not control the the lifecycle of anything. Just call `finish();` and the OS will take care of the rest. This `System.exit(0);` call may just be the cause of your problems in the first place. — Xaver Kapeller, Sep 15 '14 at 10:49
@XaverKapeller Ye I read about that, but I was just trying things in hope to solve my problem, so I also tried that. — nmck, Sep 15 '14 at 10:59
@Broxe just add finish(); like the answer below and I think you got it right now cheers :) — Umair, Sep 15 '14 at 11:08
@maven Yes and I also tried it out, but Burak's solution seems a bit easier. Anyway thanks for your help :) — nmck, Sep 15 '14 at 11:10

score 2 · Accepted Answer · edited Sep 15 '14 at 11:17

2

Try this

@Override
protected void onCreate(Bundle savedInstanceState) 
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

    Intent smsIntent = new Intent(Intent.ACTION_VIEW);
    smsIntent.setType("vnd.android-dir/mms-sms");
    smsIntent.putExtra("address", "0123456789");
    startActivity(smsIntent);
    finish();
}

edited Sep 15 '14 at 11:17

Maveňツ

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answered Sep 15 '14 at 10:48

Burak

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Thanks! It works just as I want. Thank you very much. – nmck Sep 15 '14 at 10:59

score 1 · Answer 2 · answered Sep 15 '14 at 10:59

use this theme in the activity

add this style in your style.xml

<style name="aAppTheme" parent="android:Theme.Wallpaper">
    <item name="android:background">@color/Black</item>
</style>

add this line to the manifest manifest.xml

<activity
android:name="yourpackagename.activityname"
android:label="@string/app_name"
android:theme="@style/aAppTheme" 
>

regards maven

Android: showing blank screen after backing from intent

2 Answers2