Launching activity from shortcut always launches main activity also

Question

I have built an app which changes the users wallpaper. I wish to add an Android shortcut so a user can change their wallpaper without having to fully open the app (the main use case is to tie it to a gesture in something like Nova Launcher, which allows you to select a shortcut for each gesture).

I have it all working, with one massive issue. Every time the shortcut is fired, my custom action occurs, but then the main launch activity ALSO launches! This is obviously not desired, and I cannot figure out what is going on.

Here is the ShortcutActivity code:

public class ShortcutActivity extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    final Intent intent = getIntent();
    final String action = intent.getAction();

    if (Intent.ACTION_CREATE_SHORTCUT.equals(action)) {
        setupShortcut();
        finish();
        return;
    } else {
        Toast.makeText(this, "Do something interesting.", Toast.LENGTH_SHORT).show();
        finish();
    }
}

void setupShortcut() {
    Intent shortcutIntent = new Intent("CHANGE");
    shortcutIntent.setClass(this, getClass());

    Intent intent = new Intent();
    intent.putExtra(Intent.EXTRA_SHORTCUT_NAME, getString(R.string.shortcut_title));
    intent.putExtra(Intent.EXTRA_SHORTCUT_INTENT, shortcutIntent);

    Parcelable iconResource = Intent.ShortcutIconResource.fromContext(this, R.drawable.ic_launcher);
    intent.putExtra(Intent.EXTRA_SHORTCUT_ICON_RESOURCE, iconResource);

    setResult(RESULT_OK, intent);
}
}

Here is my (simplified) manifest:

<application
    android:allowBackup="true"
    android:icon="@drawable/ic_launcher"
    android:label="@string/title_activity"
    android:theme="@style/AppTheme">
    <activity
        android:name=".WallpaperSettings"
        android:label="@string/title_activity_wallpaper_settings">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />
            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>

    <activity
        android:name=".ShortcutActivity"
        android:theme="@android:style/Theme.NoDisplay"
        android:label="@string/shortcut_title">
        <intent-filter>
            <action android:name="android.intent.action.CREATE_SHORTCUT" />
            <category android:name="android.intent.category.DEFAULT" />
        </intent-filter>
    </activity>
</application>

Is this even possible to do without trigger the main launcher activity?

Answer 1

It happened to me also. However I found a working solution. Just add android:launchMode="singleInstance" to the activity getting opened from your shortcut.

In this case:

<activity
    android:name=".MainActivity2"
    android:label="@string/title_activity_main_activity2" >
    <intent-filter>
        <action android:name="android.intent.action.CREATE_SHORTCUT"/>
        <category android:name="android.intent.category.CUSTOM_TEST" />
    </intent-filter>
</activity>

I cannot find an explanation to this, because cant really find the problem root. It just works

Source: https://stackoverflow.com/a/23002294/1354096

Answer 2

Give it a try by doing following changes.

1) setupShortcut method:

private void setupShortcut() {
Intent shortcutIntent = new Intent(getApplicationContext(),
        ShortcutActivity .class);

shortcutIntent.setAction(Intent.ACTION_VIEW);

Intent addIntent = new Intent();
addIntent
        .putExtra(Intent.EXTRA_SHORTCUT_INTENT, shortcutIntent);
addIntent.putExtra(Intent.EXTRA_SHORTCUT_NAME, getString(R.string.shortcut_title));
addIntent.putExtra(Intent.EXTRA_SHORTCUT_ICON_RESOURCE,
        Intent.ShortcutIconResource.fromContext(getApplicationContext(),
                R.drawable.ic_launcher));

addIntent
        .setAction("com.android.launcher.action.INSTALL_SHORTCUT");
getApplicationContext().sendBroadcast(addIntent);
}

2) declaration in manifest file:

 <activity
    android:name=".ShortcutActivity"

        android:noHistory="true"
        android:excludeFromRecents="true"      

    android:theme="@android:style/Theme.NoDisplay"
    android:label="@string/shortcut_title">
    <intent-filter>
        <action android:name="android.intent.action.CREATE_SHORTCUT" />
        <category android:name="android.intent.category.DEFAULT" />
    </intent-filter>
    <intent-filter>
        <action android:name="android.intent.action.VIEW" />
        <category android:name="android.intent.category.DEFAULT" />
    </intent-filter>
</activity>

I hope it will be helpful !!

Answer 3

So i've tested this with nova launcher and it seems to be working fine.

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.geronimo.testapplciation" >

<application
    android:allowBackup="true"
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme" >
    <activity
        android:name=".MainActivity"
        android:label="@string/app_name" >
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />
            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
    <activity
        android:name=".MainActivity2"
        android:label="@string/title_activity_main_activity2" >
        <intent-filter>
            <action android:name="android.intent.action.CREATE_SHORTCUT"/>
            <category android:name="android.intent.category.CUSTOM_TEST" />
        </intent-filter>
    </activity>
</application>

Things which i learnt -the category is merely text which you can change as per your will

I can launch MainActivity2 from a shortcut created from Nova Launcher.

If I launch the application from the apps drawer,MainActivity1 opens.

Possible Issue:if you open the app from the shortcut,and minimize the application,the application resumes from activity 2.

Point being,you could prefer your shortcut making mechanism like you are.And if this is the same approach/ code that you are using.Well am stumped,again.