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I want to pop up a dialog that lets the user choose a launcher to be launched with set as default option. I tried

        Intent home = new Intent(Intent.ACTION_DEFAULT);

    home.addCategory(Intent.CATEGORY_LAUNCHER);

    Intent chooser = Intent.createChooser(home, "Launcher");

    context.startActivity(chooser);

But the dialog popped by this does not have the option to set default. While the following code will not pop up the dialog if a default launcher is already set.

        Intent startMain = new Intent(Intent.ACTION_MAIN);

    startMain.addCategory(Intent.CATEGORY_HOME);

    startMain.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

    startActivity(startMain);

How can this be done?

Try using the following:

Intent startMain = new Intent(Intent.ACTION_MAIN);

startMain.addCategory(Intent.CATEGORY_HOME);

startMain.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

startActivity(startMain);

If a default action is already set (yours), you can call first:

getPackageManager().clearPackagePreferredActivities(getPackageName());

If the default action is not yours, you cannot clear it programmatically, what you can do is to check if other app is set as default and show a message..

private boolean isMyLauncherDefault() {

    PackageManager localPackageManager = getPackageManager();

    Intent intent = new Intent("android.intent.action.MAIN");

    intent.addCategory("android.intent.category.HOME");

    String str = localPackageManager.resolveActivity(intent,

          PackageManager.MATCH_DEFAULT_ONLY).activityInfo.packageName;

    return str.equals(getPackageName());

}

As a workaround in case of other app is set as default, you can created a fake home, install it (this will force the system to clear the default app) and then uninstall it...

Manifest.xml

<activity

        android:name="FakeHome"  android:enabled="false">

        <intent-filter>

            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.HOME"/>

            <category android:name="android.intent.category.DEFAULT" />

        </intent-filter>

    </activity>

FakeHome.java

public class FakeHome extends Activity {



}

Somewhere

if(!isMyLauncherDefault()) {            

PackageManager p = getPackageManager();

ComponentName cN = new ComponentName(Activity.this, FakeHome.class);

p.setComponentEnabledSetting(cN, PackageManager.COMPONENT_ENABLED_STATE_ENABLED, PackageManager.DONT_KILL_APP);



Intent selector = new Intent(Intent.ACTION_MAIN);

selector.addCategory(Intent.CATEGORY_HOME);            

startActivity(selector);



p.setComponentEnabledSetting(cN, PackageManager.COMPONENT_ENABLED_STATE_DISABLED, PackageManager.DONT_KILL_APP);            

    }