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Hongmeng starts 1

Use OKhttp Make a network request

step 1 All prerequisite configurations

	1.  Add permissions in src-main-config.json in  module Add network permissions inside 
		"reqPermissions": [ { "name": "ohos.permission.INTERNET" }]
	2. deviceConfig Add in to make http request 
		"deviceConfig": {
	    "default": {
	      "network": { "cleartextTraffic": true}
	    }
  },

step 2 Use okhttp

Import Follow android studio equally Also in build.gradle Inside

	 implementation 'com.squareup.okhttp3:okhttp:3.10.0'
   	 implementation 'com.google.code.gson:gson:2.8.5'// Easy to parse data 

Write a tool class to facilitate the request , Of course, it can also be opened directly

    public static void startNetWork(String method,String url, HashSet<DataParams> params,RequestBody body,Callback callback) {
        if (method==null){
            return;
        }
        // The maximum response time is 10 seconds 
        OkHttpClient client = new OkHttpClient.Builder().connectTimeout(10, TimeUnit.SECONDS).build();
        Request.Builder builder = new Request.Builder();
        HttpUrl.Builder builderUrl = HttpUrl.parse(url).newBuilder();
        builder.url(builderUrl.build());
        if (method.equals("GET")){
            if (params != null) {
                Iterator<DataParams> iterator = params.iterator();
                while (iterator.hasNext()){
                    builderUrl.addQueryParameter(iterator.next().getKey(), iterator.next().getValue());
                }
            }
            builder.method(method,new FormBody.Builder().build());
        }else if (method.equals("POST")){
            builder.post(body);
        }
        Call call = client.newCall(builder.build());
        call.enqueue(callback);
    }

To request - Processing data

private void login() {
        String postJson = new Gson().toJson(new UserBean(userName.getText().trim(), passWord.getText().trim()));
        RequestBody requestBody = RequestBody.create(MediaType.parse("application/json; charset=utf-8"), postJson);
        SomeUtils.startNetWork("POST", Comm.Login, null, requestBody, new Callback() {
            @Override
            public void onFailure(Call call, IOException e) {
                System.out.println(e.getMessage());
            }

            @Override
            public void onResponse(Call call, Response response) throws IOException {
                String getJSON = response.body().string();
                System.out.println(getJSON);
                // to want to   Log Print can be turned down 
                mEventHandler mEventHandler = new mEventHandler(EventRunner.create(true));
                try {
                    LoginBean loginBean = new Gson().fromJson(getJSON, LoginBean.class);
                    if (loginBean.isResult()) {
                        // Write local 
                        SomeUtils.setLoginCache(getJSON, LoginAbility.this);
                        // Jump 
                        mEventHandler.processEvent(InnerEvent.get(TO_NEXT));
                    } else {
                    	//ToastDialog This thing cannot pop up in a child thread 
                        getMainTaskDispatcher().asyncDispatch(new Runnable() {
                            @Override
                            public void run() {
                                new ToastDialog(LoginAbility.this)
                                        .setText(loginBean.getMessage())
                                        .show();
                            }
                        });
                    }
                } catch (Exception ex) {
                    ex.printStackTrace();
                }
            }
        });
    }

HiLog Printing of

• Hongmeng HiLog Official address

	// Want to print the log   Need a helper class   HiLogLabel The type of now provides only one  HiLog.LOG_APP
	private static final HiLogLabel LABEL_LOG = new HiLogLabel(HiLog.LOG_APP, 0x00, TAG);
	// True print    The second parameter here is fromat   Equivalent to placeholder format string   Brackets public Visible for logs ,private Because the log is not visible 
	HiLog.error(LABEL_LOG, "%{public}s", getJSON);
	

Interface jump

  // It's similar to the one in Andrews handler
    class mEventHandler extends EventHandler{
        public mEventHandler(EventRunner runner) throws IllegalArgumentException {
            super(runner);
        }

        @Override
        protected void processEvent(InnerEvent event) {
            super.processEvent(event);
            switch (event.eventId){
                case TO_NEXT:
                    Intent intentNext = new Intent();
                    // The design here is very uncomfortable 
                    Operation operation2 = new Intent.OperationBuilder()
                            .withBundleName(MyApplication.PackageName)
                            .withAbilityName(MyApplication.PackageName + ".ability.MainAbility").build();
                    intentNext.setOperation(operation2);
                    startAbility(intentNext);
                    terminateAbility();// amount to finish()
                    break;
            }
        }
    }

Hongmeng's local lightweight storage

	private static final String ALL_LOCAT_VALUE = "ALL_LOCAT_VALUE";
    private static final String LOGIN_CACHE  = "LOGIN_CACHE";

    public static Preferences getPref(Context context){
        DatabaseHelper helper = new DatabaseHelper(context);
        return helper.getPreferences(ALL_LOCAT_VALUE);
    }

    public static void setLoginCache(String json,Context context){
        Preferences pref = getPref(context);
        pref.putString(LOGIN_CACHE,json);
        pref.flush();
    }

    public static LoginBean.DataDTO getLoginBean(Context context){
        Preferences pref = getPref(context);
        String string = pref.getString(LOGIN_CACHE, "");
        if (string.equals(""))return null;
        LoginBean loginBean = new Gson().fromJson(string, LoginBean.class);
        return loginBean.getData();
    }