應用場景：

在一些場景中需要系統啟動以后就讓應用程序運行起來，如閘機打卡系統，智能點餐系統，廣告機系統等等。這個需求叫做自啟動。

除全國產版本核心板以外，RK3568核心板還有工業級，商業級，連接器和郵票孔多種版本。全國產版本核心板與其他版本核心板完全兼容。可以支持國產和非國產核心板的無縫切換，助力產品升級和國產化項目落地。

RK3568 Android11實現APP自啟動技術分享

平臺：迅為iTOP-3568開發板

■第一步：添加自啟服務

修改RK3568 Android11源碼frameworks\base\core\java\com\android\internal\app\ResolverActivity.java文件，添加如下藍色字體的代碼。

import java.util.Objects;

import java.util.Set;

import java.util.concurrent.Executor;

import java.util.function.Consumer;

import android.os.SystemProperties;

import android.app.role.RoleManager;

/**

* This activity is displayed when the system attempts to start an Intent for

@@ -341,6 +345,18 @@ public class ResolverActivity extends Activity implements

protected void onCreate(Bundle savedInstanceState, Intent intent,

CharSequence title, int defaultTitleRes, Intent[] initialIntents,

List rList, boolean supportsAlwaysUseOption) {

String LauncherPkg = SystemProperties.get("persist.sys.def_launherpag");

if(LauncherPkg!=null/* && !isDefaultLauncher(this,LauncherPkg)*/){

Log.v("defaultLauncher","-----found default launcher pkg:"+LauncherPkg);

setDefaltLauncher(this,LauncherPkg);

startDefaultLauncher(this,LauncherPkg);

finish();

return;

}

setTheme(appliedThemeResId());

super.onCreate(savedInstanceState);

@@ -433,6 +449,47 @@ public class ResolverActivity extends Activity implements

intent.getAction() + ":" + intent.getType() + ":"

+ (categories != null ? Arrays.toString(categories.toArray()) : ""));

}

public void setDefaltLauncher(Context context, String packageName) {

String roleName = "android.app.role.HOME";

boolean add = true;

int flags = 0;

UserHandle user = android.os.Process.myUserHandle();

RoleManager roleManager = context.getSystemService(RoleManager.class);

Executor executor = context.getMainExecutor();

Consumer< Boolean > callback = successful -> {

if (successful) {

Log.v("defaultLauncher","set Defalt Launcher successful" );

} else {

Log.v("defaultLauncher","set Defalt Launcher failed ");

}

};

roleManager.addRoleHolderAsUser(roleName, packageName, flags, user, executor, callback);

}

public void startDefaultLauncher(Context context, String packageName) {

Intent intent = new Intent();

PackageManager pm = context.getPackageManager();

intent = pm.getLaunchIntentForPackage(packageName);

if (intent != null)

intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

try {

context.startActivity(intent);

} catch (Exception e) {

Log.v("defaultLauncher","start Default Launcher failed,not find package:"+packageName );

}

}

public boolean isDefaultLauncher(Context context,String launcherPkg){

Intent intent = new Intent(Intent.ACTION_MAIN);

intent.addCategory(Intent.CATEGORY_HOME);

ResolveInfo resolveInfo = context.getPackageManager().resolveActivity(intent, PackageManager.MATCH_DEFAULT_ONLY);

String currentHomePackage = resolveInfo.activityInfo.packageName;

Log.v("defaultLauncher","-currentHomePackage:"+currentHomePackage);

return launcherPkg.equals(currentHomePackage);

}

private boolean isIntentPicker() {

return getClass().equals(ResolverActivity.class);

■第二步：添加APP

接下來將需要自啟動的APP放到device/rockchip/rk356x/rk3568_r/preinstall_del/目錄下，如果沒有preinstall_del目錄的話需要手動新建一個preinstall_del目錄即可，然后添加以下文件Android.mk，xxx.apk（APP），preinstall.mk這三個文件。

Android.mk文件內容如下所示：

include $(call all-subdir-makefiles)

preinstall.mk文件內容：

PRODUCT_PACKAGES += xxx

xxx為APP名字，例如demo.apk。這份目錄不僅是APK的預裝指定位置，當您希望新增APK進行預裝時，可將該APK文件復制至“preinstall_del/”目錄下，并隨后將APK的名稱增補至“preinstall.mk”配置文件中，以完成預安裝的準備工作。這樣的操作確保了APK能夠按照預期被系統識別并預裝至目標設備中。

■第三步：添加APP包名

修改RK3568Android11源碼文件device/rockchip/rk356x/rk3568_r/rk3568_r.mk,例如包名為：com.example.demo，在rk3568_r.mk中下面藍色字體代碼。

PRODUCT_PROPERTY_OVERRIDES += persist.sys.timezone=Asia/Shanghai

PRODUCT_PROPERTY_OVERRIDES += ro.vendor.hdmirotationlock=true

#PRODUCT_PROPERTY_OVERRIDES += vendor.hwc.device.primary=HDMI-A-1

PRODUCT_PROPERTY_OVERRIDES += vendor.hwc.device.primary=DSI

PRODUCT_PROPERTY_OVERRIDES += persist.sys.def_launherpag=com.example.demo

修改完畢之后，保存修改的文件，重新編譯Android源碼，然后燒寫Android鏡像進行測試。

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