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Homework #3 #18

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1 change: 1 addition & 0 deletions app/build.gradle
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Expand Up @@ -24,4 +24,5 @@ dependencies {
testCompile 'junit:junit:4.12'
compile 'com.android.support:appcompat-v7:23.0.1'
compile 'com.android.support:recyclerview-v7:23.0.1'
implementation 'com.android.support.constraint:constraint-layout:1.1.3'
}
3 changes: 3 additions & 0 deletions app/src/main/AndroidManifest.xml
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Expand Up @@ -2,6 +2,9 @@
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="ru.android_2019.citycam" >

<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
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260 changes: 258 additions & 2 deletions app/src/main/java/ru/android_2019/citycam/CityCamActivity.java
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@@ -1,13 +1,28 @@
package ru.android_2019.citycam;

import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.JsonReader;
import android.util.Log;
import android.view.View;
import android.widget.ImageView;
import android.widget.ProgressBar;
import android.widget.TextView;

import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;

import javax.net.ssl.HttpsURLConnection;

import ru.android_2019.citycam.model.City;
import ru.android_2019.citycam.webcams.Webcams;

/**
* Экран, показывающий веб-камеру одного выбранного города.
Expand All @@ -24,6 +39,15 @@ public class CityCamActivity extends AppCompatActivity {

private ImageView camImageView;
private ProgressBar progressView;
private TextView cityTextView;
private TextView regionTextView;
private TextView latTextView;
private TextView longTextView;

private static Webcam currentWebcam;
private static Bitmap photo;

private GetDataTask getDataTask;

@Override
protected void onCreate(Bundle savedInstanceState) {
Expand All @@ -38,14 +62,246 @@ protected void onCreate(Bundle savedInstanceState) {
setContentView(R.layout.activity_city_cam);
camImageView = (ImageView) findViewById(R.id.cam_image);
progressView = (ProgressBar) findViewById(R.id.progress);
cityTextView = (TextView) findViewById(R.id.city_cam__name);
regionTextView = (TextView) findViewById(R.id.city_cam__region);
latTextView = (TextView) findViewById(R.id.city_cam__lat);
longTextView = (TextView) findViewById(R.id.city_cam__lon);

getSupportActionBar().setTitle(city.name);

progressView.setVisibility(View.VISIBLE);

// Здесь должен быть код, инициирующий асинхронную загрузку изображения с веб-камеры
// в выбранном городе.
if (savedInstanceState != null) {
getDataTask = (GetDataTask) getLastCustomNonConfigurationInstance();
}

if (getDataTask == null) {
getDataTask = new GetDataTask(this);
getDataTask.execute();
} else {
getDataTask.attachActivity(this);
}
}

@Override
public Object onRetainCustomNonConfigurationInstance() {
getDataTask.detachActivity();
return getDataTask;
}

private static final String TAG = "CityCam";

private static class GetDataTask extends AsyncTask<Void, Void, Integer> {

private CityCamActivity activity;

GetDataTask(CityCamActivity activity) {
this.activity = activity;
updateView();
}


void attachActivity(CityCamActivity activity) {
this.activity = activity;
updateView();
}

void detachActivity() {
this.activity = null;
}

@Override
protected Integer doInBackground(Void... voids) {
try {
URL nearbyUrl = Webcams.createNearbyUrl(
(int) activity.city.latitude,
(int) activity.city.longitude);
HttpsURLConnection connection = (HttpsURLConnection) nearbyUrl.openConnection();
connection.setRequestProperty("X-RapidAPI-Key", Webcams.RAPID_API_KEY);

try {
JsonReader reader = new JsonReader(new InputStreamReader((InputStream) connection.getContent()));
List<Webcam> webcams = readWebcams(reader);
if (!webcams.isEmpty()) {
currentWebcam = webcams.get(0);
try {
InputStream in = new URL(currentWebcam.imageUrl).openStream();
photo = BitmapFactory.decodeStream(in);
} catch (Exception e) {
Log.e(TAG, e.getMessage());
e.printStackTrace();
}
updateView();
}
} catch (Exception e) {
e.printStackTrace();
}


} catch (IOException e) {
e.printStackTrace();
return 1;
}
return 0;
}

private List<Webcam> readWebcams(JsonReader reader) throws IOException {
List<Webcam> webcams = new ArrayList<>();

reader.beginObject();
while (reader.hasNext()) {
String name = reader.nextName();
if (name.equals("result")) {
reader.beginObject();
while (reader.hasNext()) {
name = reader.nextName();
if (name.equals("webcams")) {
reader.beginArray();
while (reader.hasNext()) {
Log.i(TAG, "NAME IN ARRAy: " + reader.peek().name());
webcams.add(readWebcam(reader));
}
reader.endArray();
} else {
reader.skipValue();
}
}
reader.endObject();
} else {
reader.skipValue();
}
}
reader.endObject();

return webcams;
}

private Webcam readWebcam(JsonReader reader) throws IOException {
Webcam webcam = new Webcam();

try {
reader.beginObject();
} catch (Exception e) {
e.printStackTrace();
Log.i(TAG, reader.toString());
}
while (reader.hasNext()) {
String name = reader.nextName();

switch (name) {
case "id":
webcam.id = reader.nextLong();
break;
case "image":
webcam.imageUrl = readImageUrl(reader);
break;
case "location":
reader.beginObject();
while (reader.hasNext()) {
name = reader.nextName();
switch (name) {
case "city":
webcam.city = reader.nextString();
break;
case "region":
webcam.region = reader.nextString();
break;
case "latitude":
webcam.latitude = reader.nextDouble();
break;
case "longitude":
webcam.longitude = reader.nextDouble();
break;
default:
reader.skipValue();
break;
}
}
reader.endObject();
break;
default:
reader.skipValue();
break;
}
}
reader.endObject();

Log.i(TAG, webcam.toString());
return webcam;
}

private String readImageUrl(JsonReader reader) throws IOException {
String result = null;

reader.beginObject();
while (reader.hasNext()) {
String name = reader.nextName();
if (name.equals("current")) {
reader.beginObject();
while (reader.hasNext()) {
name = reader.nextName();
if (name.equals("preview")) {
result = reader.nextString();
} else {
reader.skipValue();
}
}
reader.endObject();
} else {
reader.skipValue();
}
}
reader.endObject();
return result;
}

private void updateView() {
activity.runOnUiThread(
new Runnable() {
@Override
public void run() {
if (currentWebcam != null) {
activity.cityTextView.setText(currentWebcam.city);
activity.regionTextView.setText(currentWebcam.region);
activity.latTextView.setText(String.format("%.2f", currentWebcam.latitude));
activity.longTextView.setText(String.format("%.2f", currentWebcam.longitude));

if (photo != null) {
activity.camImageView.setImageBitmap(photo);
activity.progressView.setVisibility(View.GONE);
}
}
}
}
);

}

}

private static class Webcam {

long id;

String city;

String region;

String imageUrl;

double latitude;

double longitude;

@Override
public String toString() {
return "Webcam{" + "id=" + id +
", city='" + city + '\'' +
", region='" + region + '\'' +
", imageUrl='" + imageUrl + '\'' +
", latitude=" + latitude +
", longitude=" + longitude +
'}';
}
}
}
28 changes: 10 additions & 18 deletions app/src/main/java/ru/android_2019/citycam/webcams/Webcams.java
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Expand Up @@ -10,34 +10,26 @@
*/
public final class Webcams {

// Зарегистрируйтесь на http://ru.webcams.travel/developers/
// и вставьте сюда ваш devid
private static final String DEV_ID = "Ваш devid";
public static final String RAPID_API_KEY = "1b6b2bf409msh301a3b7eec5d75fp14ec10jsne9d8f9ba2511";

private static final String BASE_URL = "http://api.webcams.travel/rest";
private static final String BASE_URL = "https://webcamstravel.p.rapidapi.com/webcams";

private static final String PARAM_DEVID = "devid";
private static final String PARAM_METHOD = "method";
private static final String PARAM_LAT = "lat";
private static final String PARAM_LON = "lng";
private static final String PARAM_FORMAT = "format";
private static final String PATH_NEARBY = "list/nearby";

private static final String METHOD_NEARBY = "wct.webcams.list_nearby";
private static final String PARAM_LANGUAGE = "lang";
private static final String PARAM_SHOW = "show";

private static final String FORMAT_JSON = "json";
private static final int RADIUS = 100;

/**
* Возвращает URL для выполнения запроса Webcams API для получения
* информации о веб-камерах рядом с указанными координатами в формате JSON.
*/
public static URL createNearbyUrl(double latitude, double longitude)
public static URL createNearbyUrl(int latitude, int longitude)
throws MalformedURLException {
Uri uri = Uri.parse(BASE_URL).buildUpon()
.appendQueryParameter(PARAM_METHOD, METHOD_NEARBY)
.appendQueryParameter(PARAM_LAT, Double.toString(latitude))
.appendQueryParameter(PARAM_LON, Double.toString(longitude))
.appendQueryParameter(PARAM_DEVID, DEV_ID)
.appendQueryParameter(PARAM_FORMAT, FORMAT_JSON)
Uri uri = Uri.parse(BASE_URL + "/" + PATH_NEARBY + "=" + latitude + "," + longitude + "," + RADIUS).buildUpon()
.appendQueryParameter(PARAM_LANGUAGE, "ru")
.appendQueryParameter(PARAM_SHOW, "webcams:image,location")
.build();
return new URL(uri.toString());
}
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