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
{
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形式为
Java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.\"" } ] } }
其中解析代码为
Java代码
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);
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());
}
}