urlString
is pasted together with
question marks, ampersands, and equal signs.
Instead of pasting it yourself,
create it with a
Uri.Builder.
It’s like the
AlertDialog.Builder
we saw in
Text.
Uri uri = Uri.parse("http://api.openweathermap.org/data/2.5/weather");
Uri.Builder builder = uri.buildUpon();
builder.appendQueryParameter("zip", zip[0]);
builder.appendQueryParameter("units", "imperial");
builder.appendQueryParameter("mode", "json");
uri = builder.build();
String urlString = uri.toString();
You can even do it in a single statement:
String urlString =
Uri.parse("http://api.openweathermap.org/data/2.5/weather")
.buildUpon()
.appendQueryParameter("zip", zip[0])
.appendQueryParameter("units", "imperial")
.appendQueryParameter("mode", "json")
.build()
.toString();
ArrayAdapter<String>,
and plug the
ArrayAdapter<String>
into a
ListView.
In
activity_main.xml,
replace the
TextView
with the following.
<ListView
android:id="@+id/listView"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
In
doInBackground
in
MainActivity.java,
String urlString =
"http://api.openweathermap.org/data/2.5/forecast/daily"
+ "?zip=" + zip[0] //7 East 12th Street, New York NY 10003
+ "&cnt=5" //number of days
+ "&units=imperial" //fahrenheit, not celsius
+ "&mode=json"; //vs. xml or html
Change
useTheResult
to the following.
private void useTheResult(String json) {
if (json == null) {
return;
}
String[] a = new String[5];
try {
JSONObject jSONObject = new JSONObject(json);
JSONArray list = jSONObject.getJSONArray("list");
DateFormat dateFormat =
DateFormat.getDateInstance(DateFormat.FULL, Locale.getDefault());
for (int i = 0; i < list.length(); ++i) {
JSONObject day = (JSONObject)list.get(i);
long seconds = day.getLong("dt");
JSONObject temp = (JSONObject)day.getJSONObject("temp");
double max = temp.getDouble("max");
a[i] = Math.round(max) + "\u00B0 F " + dateFormat.format(1000L * seconds);
}
} catch (JSONException exception) {
Toast toast = Toast.makeText(this, exception.toString(), Toast.LENGTH_LONG);
toast.show();
}
ArrayAdapter<String> adapter = new ArrayAdapter<String> (
this,
android.R.layout.simple_list_item_1,
a
);
ListView listView = (ListView)findViewById(R.id.listView);
listView.setAdapter(adapter);
}
The JSON object contains an array named
list.
The array contains five days in its
[square brackets].
{
"message": 0.0156,
"list": [
{
"clouds": 12,
"dt": 1436288400,
"humidity": 84,
"pressure": 1010.12,
"speed": 4.8,
"deg": 221,
"weather": [
{
"id": 801,
"icon": "02n",
"description": "few clouds",
"main": "Clouds"
}
],
"temp": {
"morn": 75.31,
"min": 72.88,
"night": 72.88,
"eve": 75.31,
"max": 75.31,
"day": 75.31
}
},
{
"clouds": 80,
"dt": 1436374800,
"humidity": 80,
"pressure": 1007.54,
"speed": 5.96,
"deg": 245,
"weather": [
{
"id": 500,
"icon": "10d",
"description": "light rain",
"main": "Rain"
}
],
"temp": {
"morn": 75.7,
"min": 70,
"night": 70,
"eve": 76.89,
"max": 80.15,
"day": 80.15
},
"rain": 1.08
},
{
"clouds": 56,
"dt": 1436461200,
"humidity": 87,
"pressure": 1009.84,
"speed": 3.05,
"deg": 162,
"weather": [
{
"id": 502,
"icon": "10d",
"description": "heavy intensity rain",
"main": "Rain"
}
],
"temp": {
"morn": 67.14,
"min": 63.55,
"night": 63.55,
"eve": 73.22,
"max": 74.82,
"day": 73.35
},
"rain": 16.8
},
{
"clouds": 0,
"dt": 1436547600,
"humidity": 63,
"pressure": 1013.03,
"speed": 4.56,
"deg": 347,
"weather": [
{
"id": 800,
"icon": "01d",
"description": "sky is clear",
"main": "Clear"
}
],
"temp": {
"morn": 65.93,
"min": 64.27,
"night": 64.27,
"eve": 72.82,
"max": 78.15,
"day": 76.89
}
},
{
"clouds": 5,
"dt": 1436634000,
"humidity": 0,
"pressure": 1016.29,
"speed": 2.31,
"deg": 298,
"weather": [
{
"id": 500,
"icon": "10d",
"description": "light rain",
"main": "Rain"
}
],
"temp": {
"morn": 70.93,
"min": 68.29,
"night": 68.29,
"eve": 76.46,
"max": 78.33,
"day": 78.33
},
"rain": 0.37
}
],
"cnt": 5,
"cod": "200",
"city": {
"coord": {
"lat": 40.714272,
"lon": -74.005966
},
"id": 5128581,
"population": 0,
"country": "US",
"name": "New York"
}
}
