Android开发欧酷天气

android:id=“@+id/bing_pic_img”

android:layout_width=“match_parent”

android:layout_height=“match_parent”

android:scaleType=“centerCrop” />

android:id=“@+id/swipe_refresh”

android:layout_width=“match_parent”

android:layout_height=“match_parent”>

android:id=“@+id/weather_layout”

android:layout_width=“fill_parent”

android:layout_height=“fill_parent”

android:scrollbars=“none”

android:overScrollMode=“never”>

android:orientation=“vertical”

android:layout_width=“fill_parent”

android:layout_height=“wrap_content”

android:fitsSystemWindows=“true”>

android:id=“@+id/choose_area_fragment”

android:name=“com.example.msi.coolweather.ChooseAreaFragment”

android:layout_width=“match_parent”

android:layout_height=“match_parent”

android:layout_gravity=“start”>

3、关于网页请求

写了sendOkHttpRequest方法对网页发送请求

public static void sendOkHttpRequest(String address,okhttp3.Callback callback){

OkHttpClient client = new OkHttpClient();

Request request = new Request.Builder().url(address).build();

client.newCall(request).enqueue(callback);

}

这是一个典型的Okhttp3的网页请求代码。

对address的Url发送请求，

返回的数据用handle来进行JSON处理

//解析天气JSON数据

public static Weather handleWeatherResponse(String response){

try {

JSONObject jsonObject = new JSONObject(response);

JSONArray jsonArray = jsonObject.getJSONArray(“HeWeather”);

String weatherContent = jsonArray.getJSONObject(0).toString();

return new Gson().fromJson(weatherContent,Weather.class);

} catch (JSONException e) {

e.printStackTrace();

}

return null;

}

4、后台更新服务：

重写onStartCommand每次开始时更新图片和天气，并且每隔8小时更新一次（如果用户不使用的时候）

public int onStartCommand(Intent intent, int flags, int startId) {

updateWeather();

updateBingPic();

AlarmManager manager = (AlarmManager)getSystemService(ALARM_SERVICE);

int anHour = 8 * 60 * 60 * 1000; //8hour

long triggerAtTime = SystemClock.elapsedRealtime() + anHour;

Intent i = new Intent(this,MyServiceAutoUpdateService.class);

PendingIntent pi = PendingIntent.getService(this,0,i,0);

manager.cancel(pi);

manager.set(AlarmManager.ELAPSED_REALTIME_WAKEUP,triggerAtTime,pi);

return super.onStartCommand(intent,flags,startId);

}

private void updateBingPic() {

String requestBingPic = “http://guolin.tech/api/bing_pic”;

HttpUtil.sendOkHttpRequest(requestBingPic, new Callback() {

@Override

public void onFailure(Call call, IOException e) {

e.printStackTrace();

}

@Override

public void onResponse(Call call, Response response) throws IOException {

final String bingPic = response.body().string();

SharedPreferences.Editor editor = PreferenceManager.getDefaultSharedPreferences(MyServiceAutoUpdateService.this).edit();

editor.putString(“bing_pic”,bingPic);

editor.apply();

}

});

}

private void updateWeather() {

SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);

String weatherString = prefs.getString(“weather”,null);

if(weatherString != null){

Weather weather = Utility.handleWeatherResponse(weatherString);

final String weatherId = weather.basic.weatherId;

String weatherUrl = “http://guolin.tech/api/weather?ciatyid=?” +

weatherId + “&key=cd510ea531714e62a45fe41560a2ab54”;

HttpUtil.sendOkHttpRequest(weatherUrl, new Callback() {

@Override

public void onFailure(Call call, IOException e) {

e.printStackTrace();

}

@Override

public void onResponse(Call call, Response response) throws IOException {

String responseText = response.body().string();

Weather weather = Utility.handleWeatherResponse(responseText);

if(weather != null && “ok”.equals(weather.status)){

SharedPreferences.Editor editor = PreferenceManager.getDefaultSharedPreferences(MyServiceAutoUpdateService.this).edit();

editor.putString(“weather”,responseText);

editor.apply();

}

}

});

}