JSON之三:获取JSON文本并解释(以google的天气API为例)
时间:2014-05-15 02:46:33
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google提供了天气的api,以广州天气为例,地址为:
http://api.openweathermap.org/data/2.5/weather?q=guangzhou
返回的结果为:
{
"coord": {
"lon": 113.25,
"lat": 23.12
},
"sys": {
"message": 0.2088,
"country": "CN",
"sunrise": 1400017567,
"sunset": 1400065233
},
"weather": [
{
"id": 501,
"main": "Rain",
"description": "moderate rain",
"icon": "10d"
}
],
"base": "cmc stations",
"main": {
"temp": 299.818,
"temp_min": 299.818,
"temp_max": 299.818,
"pressure": 1004.54,
"sea_level": 1014.72,
"grnd_level": 1004.54,
"humidity": 97
},
"wind": {
"speed": 4.42,
"deg": 201.501
},
"rain": {
"3h": 6
},
"clouds": {
"all": 44
},
"dt": 1400055192,
"id": 1809858,
"name": "Guangzhou",
"cod": 200
}
因此,在本范例中,写一个天气查询的DEMO,用于输入地点,并查询天气情况。
效果如下:
详细步骤如下:
1、主界面布局文件
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" tools:context=".MainActivity" > <TextView android:id="@+id/textView1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentLeft="true" android:layout_alignParentTop="true" android:layout_marginTop="15dp" android:text="@string/location" android:textAppearance="?android:attr/textAppearanceMedium" /> <EditText android:id="@+id/editText1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignBottom="@+id/textView1" android:layout_alignParentRight="true" android:ems="10" /> <TextView android:id="@+id/textView2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignLeft="@+id/textView1" android:layout_below="@+id/textView1" android:layout_marginTop="68dp" android:text="@string/country" android:textAppearance="?android:attr/textAppearanceSmall" /> <TextView android:id="@+id/textView3" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_below="@+id/textView2" android:layout_marginTop="19dp" android:text="@string/temperature" android:textAppearance="?android:attr/textAppearanceSmall" /> <TextView android:id="@+id/textView4" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignLeft="@+id/textView3" android:layout_below="@+id/textView3" android:layout_marginTop="32dp" android:text="@string/humidity" android:textAppearance="?android:attr/textAppearanceSmall" /> <TextView android:id="@+id/textView5" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignLeft="@+id/textView4" android:layout_below="@+id/textView4" android:layout_marginTop="21dp" android:text="@string/pressure" android:textAppearance="?android:attr/textAppearanceSmall" /> <EditText android:id="@+id/editText2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_above="@+id/textView3" android:layout_toRightOf="@+id/textView3" android:ems="10" > <requestFocus /> </EditText> <EditText android:id="@+id/editText3" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignBaseline="@+id/textView3" android:layout_alignBottom="@+id/textView3" android:layout_alignLeft="@+id/editText2" android:ems="10" /> <EditText android:id="@+id/editText4" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_above="@+id/textView5" android:layout_alignLeft="@+id/editText1" android:ems="10" /> <EditText android:id="@+id/editText5" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignBaseline="@+id/textView5" android:layout_alignBottom="@+id/textView5" android:layout_alignRight="@+id/editText4" android:ems="10" /> <Button android:id="@+id/button1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignLeft="@+id/editText2" android:layout_below="@+id/editText1" android:onClick="open" android:text="@string/weather" /> </RelativeLayout>
2、定义String.xml
<?xml version="1.0" encoding="utf-8"?> <resources> <string name="app_name">JSONParser</string> <string name="action_settings">Settings</string> <string name="hello_world">Hello world!</string> <string name="location">Location</string> <string name="country">Country:</string> <string name="temperature">Temperature:</string> <string name="humidity">Humidity:</string> <string name="pressure">Pressure:</string> <string name="weather">Weather</string> </resources>
3、在AndroidManifest.xml中添加internet访问权限。
4、
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