dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation 'androidx.appcompat:appcompat:1.0.2'
    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'androidx.test:runner:1.1.1'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.1'
    // Add the following line
    implementation 'com.huawei.hms:push:5.0.0.300'
}

<service
    android:name=".MyPushService"
    android:exported="false">
    <intent-filter>
        <action android:name="com.huawei.push.action.MESSAGING_EVENT" />
    </intent-filter>
</service>

-ignorewarnings
-keepattributes *Annotation*
-keepattributes Exceptions
-keepattributes InnerClasses
-keepattributes Signature
-keepattributes SourceFile,LineNumberTable
-keep class com.hianalytics.android.**{*;}
-keep class com.huawei.updatesdk.**{*;}
-keep class com.huawei.hms.**{*;}

"R.string.agc*",
"R.string.hms*",
"R.string.connect_server_fail_prompt_toast",
"R.string.getting_message_fail_prompt_toast",
"R.string.no_available_network_prompt_toast",
"R.string.third_app_*",
"R.string.upsdk_*",
"R.layout.hms*",
"R.layout.upsdk_*",
"R.drawable.upsdk*",
"R.color.upsdk*",
"R.dimen.upsdk*",
"R.style.upsdk*"

public class MainActivity extends AppCompatActivity {
    private TextView tvToken;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        tvToken = findViewById(R.id.tv_log);
        MyReceiver receiver = new MyReceiver();
        IntentFilter filter=new IntentFilter();
        filter.addAction("com.huawei.codelabpush.ON_NEW_TOKEN");
        MainActivity.this.registerReceiver(receiver,filter);
    }
    public class MyReceiver extends BroadcastReceiver {
        @Override
        public void onReceive(Context context, Intent intent) {
            if ("com.huawei.codelabpush.ON_NEW_TOKEN".equals(intent.getAction())) {
                String token = intent.getStringExtra("token");
                tvToken.setText(token);
            }
        }
    }
}

<application
    <meta-data
        android:name="push_kit_auto_init_enabled"
        android:value="true" />
</application>

public class MyPushService extends HmsMessageService {
    private static final String TAG = "PushDemoLog";
    @Override
    public void onNewToken(String token) {
        super.onNewToken(token);
        Log.i(TAG, "receive token:" + token);
        sendTokenToDisplay(token);
    }
    private void sendTokenToDisplay(String token) {
        Intent intent = new Intent("com.huawei.push.codelab.ON_NEW_TOKEN");
        intent.putExtra("token", token);
        sendBroadcast(intent);
    }
}

adb install D:\WorkSpace\CodeLab\pushdemo1\app\release\app-release.apk