今天給大家分享一個有趣的鴻蒙分布式小游戲：你畫我猜。

開發心得（如有錯誤還請大佬及時指正）：

• 分布式流轉：一個 APP 應用在設備之間互相拉起遷移，只在一個終端上運行。

• 分布式協同：一個 APP 同時在多個設備上運行，畫面實時共享，數據實時傳輸。

在工程創立之后，首先有個很重要的事情那就是驗權。

①這個分布式協同會用到一個權限接口，去 MainAbilitySlice 里面申請

voidgrantPermission(){//獲取驗證權限數據交互允許不同設備間的數據交換。
if(verifySelfPermission(DISTRIBUTED_DATASYNC)!=IBundleManager.PERMISSION_GRANTED){
if(canRequestPermission(DISTRIBUTED_DATASYNC)){
requestPermissionsFromUser(newString[]{DISTRIBUTED_DATASYNC},PERMISSION_CODE);
}
}
}

權限接口文檔鏈接：

https://developer.harmonyos.com/cn/docs/documentation/doc-guides/security-permissions-available-0000001051089272

開發者需要在 config.json 文件中的“reqPermissions”字段中聲明所需要的權限。

{
"module":{
"reqPermissions":[
{
"name":"ohos.permission.CAMERA",
"reason":"$string:permreason_camera",
"usedScene":
{
"ability":["com.mycamera.Ability","com.mycamera.AbilityBackground"],
"when":"always"
}
},{
...
}
]
}
}
}

{
"name":"ohos.permission.DISTRIBUTED_DEVICE_STATE_CHANGE"//允許獲取分布式組網內設備的狀態變化。
},
{
"name":"ohos.permission.GET_DISTRIBUTED_DEVICE_INFO"//允許獲取分布式組網內的設備列表和設備信息。
},
{
"name":"ohos.permission.GRT_BUNDLE_INFO"//查詢其他應用的信息。
},
{
"name":"ohos.permission.INTERNET"//允許使用網絡socket。
}

應用權限列表文檔鏈接：

https://developer.harmonyos.com/cn/docs/documentation/doc-guides/security-permissions-guidelines-0000000000029886

再看頁面結構：

• graphic：頁面樣式效果調配

• layoput：此 demo 的 java UI 頁面布局結構

主頁面入口布局代碼 ability_main：

<DirectionalLayout
xmlns:ohos="http://schemas.huawei.com/res/ohos"
ohos:height="match_parent"
ohos:width="match_parent"
ohos:orientation="vertical"
ohos:background_element="$graphic:background_button">

<Text
ohos:height="match_content"
ohos:width="match_content"
ohos:top_margin="150px"
ohos:layout_alignment="horizontal_center"
ohos:text="你好鴻蒙_你畫我猜"
ohos:text_size="38fp"
/>

<Image
ohos:id="$+id:imageComponent"
ohos:height="200vp"
ohos:width="1080"
ohos:top_margin="150px"
ohos:image_src="$media:HM"
/>

<Button
ohos:id="$+id:help_btn"
ohos:height="100vp"
ohos:width="300vp"
ohos:background_element="$graphic:background_button"
ohos:layout_alignment="horizontal_center"
ohos:left_padding="15vp"
ohos:right_padding="15vp"
ohos:text="進入游戲"
ohos:text_size="30vp"
ohos:top_margin="20vp">
Button>


DirectionalLayout>

游戲匹配頁面布局 math_game：

<DirectionalLayout
xmlns:ohos="http://schemas.huawei.com/res/ohos"
ohos:height="match_parent"
ohos:width="match_parent"
ohos:orientation="vertical">

<Button
ohos:id="$+id:help_btn"
ohos:height="match_content"
ohos:width="500px"
ohos:background_element="$graphic:background_begin"
ohos:layout_alignment="horizontal_center"
ohos:left_padding="15vp"
ohos:right_padding="15vp"
ohos:text="匹配對手"
ohos:text_size="30vp"
ohos:top_margin="200vp">
Button>
<Image
ohos:id="$+id:imageComponent"
ohos:height="200vp"
ohos:width="1080"
ohos:top_margin="100px"
ohos:image_src="$media:NHWC"

/>

DirectionalLayout>

MainAbilitySlice：

packagecom.huawei.codelab.slice;

importstaticohos.security.SystemPermission.DISTRIBUTED_DATASYNC;

importcom.huawei.codelab.ResourceTable;
importcom.huawei.codelab.utils.CommonData;
importcom.huawei.codelab.utils.LogUtil;
importohos.aafwk.ability.AbilitySlice;
importohos.aafwk.content.Intent;
importohos.aafwk.content.Operation;
importohos.agp.components.Component;
importohos.bundle.IBundleManager;



publicclassMainAbilitySliceextendsAbilitySlice{
privatestaticfinalStringTAG=CommonData.TAG+MainAbilitySlice.class.getSimpleName();

privatestaticfinalintPERMISSION_CODE=10000000;

@Override
publicvoidonStart(Intentintent){
super.onStart(intent);
super.setUIContent(ResourceTable.Layout_ability_main);
grantPermission();
initView();
}

voidgrantPermission(){//獲取驗證權限數據交互允許不同設備間的數據交換。
if(verifySelfPermission(DISTRIBUTED_DATASYNC)!=IBundleManager.PERMISSION_GRANTED){
if(canRequestPermission(DISTRIBUTED_DATASYNC)){
requestPermissionsFromUser(newString[]{DISTRIBUTED_DATASYNC},PERMISSION_CODE);
}
}
}
//
privatevoidinitView(){
findComponentById(ResourceTable.Id_help_btn).setClickedListener(newButtonClick());

}

privatevoidmathGame(){//數學游戲
LogUtil.info(TAG,"ClickResourceTableId_math_game");
IntentmathGameIntent=newIntent();
OperationoperationMath=newIntent.OperationBuilder().withBundleName(getBundleName())
.withAbilityName(CommonData.ABILITY_MAIN)
.withAction(CommonData.MATH_PAGE)
.build();
mathGameIntent.setOperation(operationMath);
startAbility(mathGameIntent);
}

//進入游戲
privateclassButtonClickimplementsComponent.ClickedListener{
@Override
publicvoidonClick(Componentcomponent){
mathGame();
}
}

}

MathGameAbilitySlice：

packagecom.huawei.codelab.slice;
importcom.huawei.codelab.ResourceTable;
importcom.huawei.codelab.devices.SelectDeviceDialog;
importcom.huawei.codelab.utils.CommonData;
importcom.huawei.codelab.utils.LogUtil;
importohos.aafwk.ability.AbilitySlice;
importohos.aafwk.content.Intent;
importohos.aafwk.content.Operation;
importohos.agp.components.Button;
importohos.agp.components.Component;
importohos.data.distributed.common.KvManagerConfig;
importohos.data.distributed.common.KvManagerFactory;
importohos.distributedschedule.interwork.DeviceInfo;
importohos.distributedschedule.interwork.DeviceManager;
importjava.util.ArrayList;
importjava.util.List;


publicclassMathGameAbilitySliceextendsAbilitySlice{
privatestaticfinalStringTAG=CommonData.TAG+MathGameAbilitySlice.class.getSimpleName();

privateButtonhelpBtn;

privateListdevices=newArrayList<>();

@Override
publicvoidonStart(Intentintent){
super.onStart(intent);
super.setUIContent(ResourceTable.Layout_math_game);
initView();

}

privatevoidinitView(){

if(findComponentById(ResourceTable.Id_help_btn)instanceofButton){
helpBtn=(Button)findComponentById(ResourceTable.Id_help_btn);
}
helpBtn.setClickedListener(newButtonClick());
}


privatevoidgetDevices(){
if(devices.size()>0){
devices.clear();
}
ListdeviceInfos=
DeviceManager.getDeviceList(ohos.distributedschedule.interwork.DeviceInfo.FLAG_GET_ONLINE_DEVICE);
LogUtil.info(TAG,"MathGameAbilitySlicedeviceInfossizeis:"+deviceInfos.size());
devices.addAll(deviceInfos);
showDevicesDialog();
}

privatevoidshowDevicesDialog(){
newSelectDeviceDialog(this,devices,deviceInfo->{
startLocalFa(deviceInfo.getDeviceId());
startRemoteFa(deviceInfo.getDeviceId());
}).show();
}

privatevoidstartLocalFa(StringdeviceId){
LogUtil.info(TAG,"startLocalFa......");
Intentintent=newIntent();
intent.setParam(CommonData.KEY_REMOTE_DEVICEID,deviceId);
intent.setParam(CommonData.KEY_IS_LOCAL,true);
Operationoperation=newIntent.OperationBuilder().withBundleName(getBundleName())
.withAbilityName(CommonData.ABILITY_MAIN)
.withAction(CommonData.DRAW_PAGE)
.build();
intent.setOperation(operation);
startAbility(intent);
}

privatevoidstartRemoteFa(StringdeviceId){
LogUtil.info(TAG,"startRemoteFa......");
StringlocalDeviceId=
KvManagerFactory.getInstance().createKvManager(newKvManagerConfig(this)).getLocalDeviceInfo().getId();
Intentintent=newIntent();
intent.setParam(CommonData.KEY_REMOTE_DEVICEID,localDeviceId);
intent.setParam(CommonData.KEY_IS_LOCAL,false);
Operationoperation=newIntent.OperationBuilder().withDeviceId(deviceId)
.withBundleName(getBundleName())
.withAbilityName(CommonData.ABILITY_MAIN)
.withAction(CommonData.DRAW_PAGE)
.withFlags(Intent.FLAG_ABILITYSLICE_MULTI_DEVICE)
.build();
intent.setOperation(operation);
startAbility(intent);
}

privateclassButtonClickimplementsComponent.ClickedListener{
@Override
publicvoidonClick(Componentcomponent){
getDevices();//啟動機器匹配
}
}
}

責任編輯：haq