Android basic training networking

Июль 30, 2022

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Android basic training networking

Содержание

2. Networking. Premissions "android.permission.ACCESS_NETWORK_STATE" />
3. Networking. Manage Network Connection final ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE); final NetworkInfo networkInfo = connectivityManager.getActiveNetworkInfo(); if
4. Networking. Connectivity Change 1 Explicit boadcast: final IntentFilter filter = new IntentFilter(); filter.addAction("android.net.conn.CONNECTIVITY_CHANGE"); registerReceiver(new ConnectivityReceiver(), filter);
5. Networking. Connectivity Change Job Scheduler: JobScheduler js = (JobScheduler) context.getSystemService(Context.JOB_SCHEDULER_SERVICE); JobInfo job = new JobInfo.Builder(MY_BACKGROUND_JOB, new
6. Networking. Data Usage 1 Detect if connection is metered or unmetered 2 Detect if Data Saver
7. Networking. Connecting final URL url = new URL("exampleurl.com"); final HttpsURLConnection connection = (HttpsURLConnection) url.openConnection(); connection.setReadTimeout(5000); connection.setConnectTimeout(5000);
8. Networking. Read Input Stream if (inputStream != null) { StringBuffer stringBuffer = new StringBuffer(); try {
9. Networking. JSON Parsing { "users": [ { "id": "007", "name": "James Bond", "email": "james.bond@MI6.com", "address": "London",
10. Networking. JSON Parsing final JSONObject object = new JSONObject(result); final JSONArray jsonArray = object.getJSONArray("users"); if (jsonArray
11. Networking. JSON Parsing Google GSON https://github.com/google/gson final Gson gson = new GsonBuilder().create(); final User[] users =
12. Networking. UI thread
14. Скачать презентацию

Слайд 2

Networking. Premissions

"android.permission.ACCESS_NETWORK_STATE" />

Слайд 3

Networking. Manage Network Connection
final ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
final NetworkInfo networkInfo

= connectivityManager.getActiveNetworkInfo();
if (networkInfo != null) {
//no internet connection
}
if (networkInfo.getType() == ConnectivityManager.TYPE_WIFI && networkInfo.isConnected()) {
//connected to wi-fi
} else if (networkInfo.getType() == ConnectivityManager.TYPE_MOBILE && networkInfo.isConnected()) {
//connected to wi-fi }

Слайд 4

Networking. Connectivity Change
1 Explicit boadcast:
final IntentFilter filter = new IntentFilter();

filter.addAction("android.net.conn.CONNECTIVITY_CHANGE");
registerReceiver(new ConnectivityReceiver(), filter);
2 Job Scheduling
3 GcmNetworkManager

Слайд 5

Networking. Connectivity Change
Job Scheduler:
JobScheduler js = (JobScheduler) context.getSystemService(Context.JOB_SCHEDULER_SERVICE);
JobInfo job = new

JobInfo.Builder(MY_BACKGROUND_JOB,
new ComponentName(context, MyJobService.class))
.setRequiredNetworkType(JobInfo.NETWORK_TYPE_UNMETERED)
.setRequiresCharging(true)
.build();
js.schedule(job);

Слайд 6

Networking. Data Usage
1 Detect if connection is metered or unmetered
2 Detect

if Data Saver is on and app is in whitelist
3 Use PreferenceActivity to handle data usage in your app

Слайд 7

Networking. Connecting
final URL url = new URL("exampleurl.com");
final HttpsURLConnection connection = (HttpsURLConnection)

url.openConnection();
connection.setReadTimeout(5000);
connection.setConnectTimeout(5000);
connection.setRequestMethod("GET");
connection.setDoInput(true);
connection.connect();
final int resonseCode = connection.getResponseCode();
if (resonseCode != HttpsURLConnection.HTTP_OK) {
//handle an error, throw exception
}
inputStream = connection.getInputStream();
if (inputStream != null) {
//read response
}

Слайд 8

Networking. Read Input Stream
if (inputStream != null) {
StringBuffer stringBuffer = new

StringBuffer();
try {
inputStream = new BufferedInputStream(connection.getInputStream());
BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));
String inputLine = "";
while ((inputLine = reader.readLine()) != null) {
stringBuffer.append(inputLine);
}
result = stringBuffer.toString();
}
catch (Exception e) {
//handle an exception
} finally { //close inputStream }

Слайд 9

Networking. JSON Parsing
{
"users": [
{
"id": "007",
"name": "James Bond",

"email": "james.bond@MI6.com",
"address": "London",
"gender": "male",
"phone": {
"mobile": "+91 0000000000",
"home": "00 000000"
},
"weapon": "Walther PPK"
},
] }

Слайд 10

Networking. JSON Parsing
final JSONObject object = new JSONObject(result);
final JSONArray jsonArray =

object.getJSONArray("users");
if (jsonArray != null && jsonArray.length() > 0) {
for (int i = 0; i < jsonArray.length(); i++) {
JSONObject userObj = jsonArray.getJSONObject(i);
User user = new User();
user.name = userObj.getString("name");
user.email = userObj.getString("email");
user.address = userObj.getString("address");
user.gender = userObj.getString("gender");
user.weapon = userObj.getString("weapon");
JSONObject phoneObj = userObj.getJSONObject("phone");
Phone phone = new Phone();
phone.mobile = phoneObj.getString("mobile");
phone.home = phoneObj.getString("home");
user.phone = phone; }}

Слайд 11

Networking. JSON Parsing
Google GSON
https://github.com/google/gson
final Gson gson = new GsonBuilder().create();
final User[]

users = gson.fromJson(reader, User[].class);

Слайд 12

Android basic training networking

Содержание

Networking. Premissions"android.permission.ACCESS_NETWORK_STATE" />

Networking. Manage Network Connectionfinal ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);final NetworkInfo networkInfo

Networking. Connectivity Change1 Explicit boadcast: final IntentFilter filter = new IntentFilter();

Networking. Connectivity ChangeJob Scheduler:JobScheduler js = (JobScheduler) context.getSystemService(Context.JOB_SCHEDULER_SERVICE);JobInfo job = new

Networking. Data Usage1 Detect if connection is metered or unmetered2 Detect

Networking. Connectingfinal URL url = new URL("exampleurl.com");final HttpsURLConnection connection = (HttpsURLConnection)

Networking. Read Input Streamif (inputStream != null) {StringBuffer stringBuffer = new

Networking. JSON Parsing{ "users": [ { "id": "007", "name": "James Bond",

Networking. JSON Parsingfinal JSONObject object = new JSONObject(result);final JSONArray jsonArray =

Networking. JSON ParsingGoogle GSON https://github.com/google/gsonfinal Gson gson = new GsonBuilder().create();final User[]

Networking. UI thread

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