android解析Json
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
StringstaticObject="{\"firstname\":\"Steve\",\"lastname\":\"Jobs\",\"cellphones\":\"0\"}";
voidbuildObject()
{
try
{
obj=newJSONObject(staticObject);
Stringx=obj.get("firstname").toString()+""+obj.get("lastname").toString()+"has"+obj.getInt("cellphones")+"Androidphones.";
setStatus(x);
}
catch(JSONExceptionje)
{
setStatus("Erroroccured"+je.getMessage());
}
}
voidsetStatus(Stringx)
{
TextViewtv=(TextView)findViewById(R.id.txtStatus);
tv.setText(x);
}
StringstaticObject="{\"firstname\":\"Steve\",\"lastname\":\"Jobs\",\"cellphones\":\"0\"}";voidbuildObject(){try{obj=newJSONObject(staticObject);Stringx=obj.get("firstname").toString()+""+obj.get("lastname").toString()+"has"+obj.getInt("cellphones")+"Androidphones.";setStatus(x);}catch(JSONExceptionje){setStatus("Erroroccured"+je.getMessage());}}voidsetStatus(Stringx){TextViewtv=(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":"CornellUniversity",
"occupation":"President,WorldVision",
"interview":
{
"source":"http://blog.guykawasaki.com/2007/05/ten_or_so_quest.html#ixzz0giEIX0zY",
"questions":
[
{
"Question":"HowmuchmoneydoesWorldVisionraiseeveryyear?",
"Answer":"Worldwide,WorldVisionraisesabout$2billionannually;theU.S.office,whichIheadup,raisesabouthalfofthetotal."
},
{
"Question":"Isthisthe80/20rulewheretwentypercentofthepeoplesendineightypercentofthemoneyoraredonationsmorespreadout?",
"Answer":"WorldVision'sstrengthisthatwearesupportedbyhundredsofthousandsoffaithfulpeoplewhogiveusaboutadollaradaybysponsoringchildren.Our\"majordonors\"accountforlessthanfivepercentofourtotalincome.Also,foranon-profit,wehavequiteadiversifiedportfolioofrevenue.Justoverfortypercentiscashfromprivatecitizens;thirtypercentisgovernmentgrantsinfoodandcash;andaboutthirtypercentareproductsdonatedfromcorporation--whatwecall\"gifts-in-kind.\""
}
]
}
}
{"firstname":"Richard","lastname":"Stearns","almamater":"CornellUniversity","occupation":"President,WorldVision","interview":{"source":"http://blog.guykawasaki.com/2007/05/ten_or_so_quest.html#ixzz0giEIX0zY","questions":[{"Question":"HowmuchmoneydoesWorldVisionraiseeveryyear?","Answer":"Worldwide,WorldVisionraisesabout$2billionannually;theU.S.office,whichIheadup,raisesabouthalfofthetotal."},{"Question":"Isthisthe80/20rulewheretwentypercentofthepeoplesendineightypercentofthemoneyoraredonationsmorespreadout?","Answer":"WorldVision'sstrengthisthatwearesupportedbyhundredsofthousandsoffaithfulpeoplewhogiveusaboutadollaradaybysponsoringchildren.Our\"majordonors\"accountforlessthanfivepercentofourtotalincome.Also,foranon-profit,wehavequiteadiversifiedportfolioofrevenue.Justoverfortypercentiscashfromprivatecitizens;thirtypercentisgovernmentgrantsinfoodandcash;andaboutthirtypercentareproductsdonatedfromcorporation--whatwecall\"gifts-in-kind.\""}]}}
其中解析代码为
Java代码
voidbuildObjectFromFile()
{
try
{
Stringx="";
InputStreamis=this.getResources().openRawResource(R.raw.interview);
byte[]buffer=newbyte[is.available()];
while(is.read(buffer)!=-1);
Stringjson=newString(buffer);
obj=newJSONObject(json);
x=obj.getString("firstname")+""+obj.getString("lastname")+"n";
x+=obj.getString("occupation")+"n";
JSONObjectinterview=obj.getJSONObject("interview");
x+="Interviewsource:"+interview.getString("source")+"n";
JSONArrayquestions=interview.getJSONArray("questions");
x+="Numberofquestions:"+questions.length()+"nn";
inti;
for(i=0;i<questions.length();i++)
{
JSONObjectqa=questions.getJSONObject(i);
x+="------------n";
x+="Q"+(i+1)+"."+qa.getString("Question")+"nn";
x+="A"+(i+1)+"."+qa.getString("Answer")+"n";
}
setStatus(x);
}
catch(Exceptionje)
{
setStatus("Errorw/file:"+je.getMessage());
}
}