Debug app that runs at boot

Question

I am using Android Studio.

I added a BroadcastReceiver for my app that receives android.intent.action.BOOT_COMPLETED, the receiver just shows up a Toast for testing. The problem is I get "App has stopped" message just after Android starts up.

My first question is: is there anyway to debug that at startup and see where is the problem by myself? Because I can't see any log referring to that problem in Android Studio.

My second question is related to the problem itself. Here is the code: XML:

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

    <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name="MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

        <receiver
            android:name=".AutoStartReceiver"
            android:enabled="true">
            <intent-filter>
                <action android:name="android.intent.action.BOOT_COMPLETED" />
            </intent-filter>
        </receiver>

    </application>

</manifest>

Java: BroadcastReceiver

public class AutoStartReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        Toast.makeText(context, "loaded", Toast.LENGTH_LONG).show();
        throw new UnsupportedOperationException("Not yet implemented");
    }
}

The third question is: Is it OK to do some heavy work (read some files and set the AlarmManager) in the receiver rather than creating a service? because as of API 26 Android is putting a lot of restriction to services.

Thank you

Answer 1

For the debugging part I used this (in the Terminal, when the emulator is on) :

adb shell am set-debug-app -w --persistent <your.app.package> 

to start debugging, then click Attach debugger to android process when the app prompts for it on the emulator.

To disable this:

adb shell am clear-debug-app <your.app.package>

Found answer here : https://medium.com/@elye.project/debug-app-deeplink-at-launch-time-bdb2cf04a9e6