android解析Json

点击数：1603 发表时间：2014-03-20 06:14:38 作者：来源链接：

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android框架已经为我们集成了解析json的包

先一个简单的例子，json直接写在string中

Java代码

String staticObject = "{\"firstname\":\"Steve\",\"lastname\":\"Jobs\",\"cellphones\":\"0\"}";

void buildObject()

{

try

{

JSONObject obj = new JSONObject(staticObject);

String x = obj.get("firstname").toString() + " " + obj.get("lastname").toString() + " has " + obj.getInt("cellphones") + " Android phones.";

setStatus(x);
}
catch (JSONException je)

{
setStatus("Error occured " + je.getMessage());

}

void setStatus(String x)

{

TextView tv = (TextView) findViewById(R.id.txtStatus);

tv.setText(x);

}

	String staticObject = "{\"firstname\":\"Steve\",\"lastname\":\"Jobs\",\"cellphones\":\"0\"}";  void buildObject() {  try  {   obj = new JSONObject(staticObject);   String x = obj.get("firstname").toString() + " " + obj.get("lastname").toString() + " has " + obj.getInt("cellphones") + " Android phones.";   setStatus(x);  }  catch (JSONException je)  {   setStatus("Error occured " + je.getMessage());  } }  void setStatus(String x) {  TextView tv = (TextView) findViewById(R.id.txtStatus);  tv.setText(x); }

将json写在文件中，并放在raw目录下

Json代码

{
"firstname":"Richard",
"lastname":"Stearns",
"almamater":"Cornell University",
"occupation":"President, World Vision",
"interview":
{
"source" : "http://blog.guykawasaki.com/2007/05/ten_or_so_quest.html#ixzz0giEIX0zY",
"questions":
[
{
"Question": "How much money does World Vision raise every year?",
"Answer": "Worldwide, World Vision raises about $2 billion annually; the U.S. office, which I head up, raises about half of the total."
},
{
"Question": "Is this the 80/20 rule where twenty percent of the people send in eighty percent of the money or are donations more spread out?",
"Answer": "World Vision's strength is that we are supported by hundreds of thousands of faithful people who give us about a dollar a day by sponsoring children. Our \"major donors\" account for less than five percent of our total income. Also, for a non-profit, we have quite a diversified portfolio of revenue. Just over forty percent is cash from private citizens; thirty percent is government grants in food and cash; and about thirty percent are products donated from corporation--what we call \"gifts-in-kind.\""
}
]
}
}

	{ "firstname":"Richard", "lastname":"Stearns", "almamater":"Cornell University", "occupation":"President, World Vision", "interview":  {   "source" : "http://blog.guykawasaki.com/2007/05/ten_or_so_quest.html#ixzz0giEIX0zY",   "questions":    [    {    "Question": "How much money does World Vision raise every year?",    "Answer": "Worldwide, World Vision raises about $2 billion annually; the U.S. office, which I head up, raises about half of the total."    },    {    "Question": "Is this the 80/20 rule where twenty percent of the people send in eighty percent of the money or are donations more spread out?",    "Answer": "World Vision's strength is that we are supported by hundreds of thousands of faithful people who give us about a dollar a day by sponsoring children. Our \"major donors\" account for less than five percent of our total income. Also, for a non-profit, we have quite a diversified portfolio of revenue. Just over forty percent is cash from private citizens; thirty percent is government grants in food and cash; and about thirty percent are products donated from corporation--what we call \"gifts-in-kind.\""    }    ]  } }

其中解析Java代码为

public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);

		buildObjectFromFile();
	}

	void buildObjectFromFile() {
		try {
			String x = "";
			InputStream is = this.getResources().openRawResource(
					R.raw.interview);
			byte[] buffer = new byte[is.available()];
			while (is.read(buffer) != -1)
				;
			String json = new String(buffer);
			JSONObject obj = new JSONObject(json);
			x = obj.getString("firstname") + " " + obj.getString("lastname")
					+ "n";
			x += obj.getString("occupation") + "n";
			JSONObject interview = obj.getJSONObject("interview");
			x += "Interview source:" + interview.getString("source") + "n";
			JSONArray questions = interview.getJSONArray("questions");
			x += "Number of questions: " + questions.length() + "nn";
			int i;
			for (i = 0; i < questions.length(); i++) {
				JSONObject qa = questions.getJSONObject(i);
				x += "------------n";
				x += "Q" + (i + 1) + ". " + qa.getString("Question") + "nn";
				x += "A" + (i + 1) + ". " + qa.getString("Answer") + "n";
			}
			setStatus(x);
		} catch (Exception je) {
			setStatus("Error w/file: " + je.getMessage());
		}
	}

	private void setStatus(String x) {
		System.out.println(x);
	}

0

很好

0

一般

0

差劲

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