How to use activity-alias to manage app arguments

Richard Buchmann

I'm building a Qt application using cmake for android platform.

I would like to have 2 intent launchers.
Each launcher has its own arguments.

activity-alias seems to be adequate to do that:

    <activity-alias
        android:name=".FullscreenAlias"
        android:targetActivity="org.qtproject.qt.android.bindings.QtActivity">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />
            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
        <meta-data
            android:name="android.app.arguments"
            android:value="--fullscreen" />
    </activity-alias>

I run like this:
adb shell am start -n com.sample.app/org.qtproject.qt.android.bindings.QtActivity # OK
adb shell am start -n com.sample.app/.FullscreenAlias # NOK

I got the following error message:
"Your application encountered a fatal error and cannot continue."

I guess the related logs are:

10-30 14:30:24.956  7247  7247 W System  : ClassLoader referenced unknown path: 
10-30 14:30:24.969  7247  7269 W System.err: java.lang.NullPointerException: Attempt to invoke virtual method 'boolean android.os.Bundle.containsKey(java.lang.String)' on a null object reference
10-30 14:30:24.969  7247  7269 W System.err: 	at org.qtproject.qt.android.QtNative$4.run(QtNative.java:292)
10-30 14:30:24.969  7247  7269 W System.err: 	at org.qtproject.qt.android.QtThread$2.run(QtThread.java:51)
10-30 14:30:24.969  7247  7269 W System.err: 	at org.qtproject.qt.android.QtThread$1.run(QtThread.java:25)
10-30 14:30:24.969  7247  7269 W System.err: 	at java.lang.Thread.run(Thread.java:920)
10-30 14:30:24.970  7247  7247 W System.err: java.lang.Exception: 
10-30 14:30:24.970  7247  7247 W System.err: 	at org.qtproject.qt.android.bindings.QtLoader.loadApplication(QtLoader.java:188)
10-30 14:30:24.970  7247  7247 W System.err: 	at org.qtproject.qt.android.bindings.QtLoader.startApp(QtLoader.java:374)
10-30 14:30:24.970  7247  7247 W System.err: 	at org.qtproject.qt.android.bindings.QtActivityLoader.onCreate(QtActivityLoader.java:114)
10-30 14:30:24.970  7247  7247 W System.err: 	at org.qtproject.qt.android.bindings.QtActivity.onCreateHook(QtActivity.java:237)
10-30 14:30:24.970  7247  7247 W System.err: 	at org.qtproject.qt.android.bindings.QtActivity.onCreate(QtActivity.java:257)
10-30 14:30:24.970  7247  7247 W System.err: 	at android.app.Activity.performCreate(Activity.java:8050)
10-30 14:30:24.970  7247  7247 W System.err: 	at android.app.Activity.performCreate(Activity.java:8030)
10-30 14:30:24.970  7247  7247 W System.err: 	at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1329)
10-30 14:30:24.970  7247  7247 W System.err: 	at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3648)
10-30 14:30:24.970  7247  7247 W System.err: 	at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3832)
10-30 14:30:24.970  7247  7247 W System.err: 	at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:103)

Do you know what is wrong and how to launch Qt app with 2 launchers/arguments?

gandouge

Hello,

You need to configure more parameters inside your activity-alias

    <activity-alias
        android:name=".Test"
        android:enabled="true"
        android:exported="true"
        android:label="-- %%INSERT_APP_NAME%% --"
        android:targetActivity="org.qtproject.qt.android.bindings.QtActivity">

Add copy all meta-data needed by the default activity to start