这是我的JSON文件
{
"data": [{
"title": "Algebra",
"data": [
{
"title":"Factoring Formulas",
"link":"Alge/eqA01.html"
},
{
"title":"Product Formulas",
"link":"Alge/eqA02.html"
},
{
"title":"Roots Formulas",
"link":"Alge/eqA03.html"
},
{
"title":"Powers Formulas",
"link":"Alge/eqA04.html"
},
{
"title":"Logarithm Formulas",
"link":"Alge/eqA05.html"
},
{
"title":"Useful Formulas",
"link":"Alge/eqA06.html"
},
{
"title":"Complex Formulas",
"link":"Alge/eqA07.html"
},
{
"title":"Binomial Formulas",
"link":"Alge/eqA08.html"
}
]
},{
"title": "Geometry",
"data": [
{
"title":"Cone",
"link":"geo/eqG08.html"
},
{
"title":"Cylinder",
"link":"geo/eqG10.html"
},
{
"title":"Isosceles Triangle",
"link":"geo/eqG01.html"
},
{
"title":"Equilateral Traingle",
"link":"geo/eqG02.html"
},
{
"title":"Square",
"link":"geo/eqG03.html"
},
{
"title":"Sphere",
"link":"geo/eqG09.html"
},
{
"title":"Rechtangle",
"link":"geo/eqG04.html"
},
{
"title":"Rhombus",
"link":"geo/eqG05.html"
},
{
"title":"Parallelogram",
"link":"geo/eqG06.html"
},
{
"title":"Trapezoid",
"link":"geo/eqG07.html"
}
]
},{
"title": "Analytical Geometry",
"data": [
{
"title":"2-D Coordinate System",
"link":"Anageo/eqAG01.html"
},
{
"title":"Circle",
"link":"Anageo/eqAG02.html"
},
{
"title":"Hyerbola",
"link":"Anageo/eqAG03.html"
},
{
"title":"Ellipse",
"link":"Anageo/eqAG04.html"
},
{
"title":"Parabola",
"link":"Anageo/eqAG05.html"
}
]
},{
"title": "Derivative",
"data": [
{
"title":"Limits Formulas",
"link":"Deriv/eqD01.html"
},
{
"title":"Properties of Derivative",
"link":"Deriv/eqD02.html"
},
{
"title":"General Derivative Formulas",
"link":"Deriv/eqD03.html"
},
{
"title":"Trigonometric Formulas",
"link":"Deriv/eqD04.html"
},
{
"title":"Inverse Trigonometric Functions",
"link":"Deriv/eqD05.html"
},
{
"title":"Hyperbolic Functions",
"link":"Deriv/eqD06.html"
},
{
"title":"Inverse Hyperbolic Functions",
"link":"Deriv/eqD07.html"
}
]
},{
"title": "Integration",
"data": [
{
"title":"Properties of Integration",
"link":"Integ/eqI01.html"
},
{
"title":"Integration of Rational Functions",
"link":"Integ/eqI02.html"
},
{
"title":"Integration of Trigonometic Functions",
"link":"Integ/eqI03.html"
},
{
"title":"Integration of Hyperbolic Function",
"link":"Integ/eqI04.html"
},
{
"title":"Integration of Exponential and Log Function",
"link":"Integ/eqI05.html"
}
]
},{
"title": "Trigonometry",
"data": [
{
"title":"Basic",
"link":"Trign/eqT08.html"
},
{
"title":"General",
"link":"Trign/eqT01.html"
},
{
"title":"Sine rule Cosine rule",
"link":"Trign/eqT09.html"
},
{
"title":"Table of angle",
"link":"Trign/eqT02.html"
},
{
"title":"Angle transformation",
"link":"Trign/eqT05.html"
},
{
"title":"Half/Double/Multiple angle",
"link":"Trign/eqT04.html"
},
{
"title":"Sum of functions",
"link":"Trign/eqT05.html"
},
{
"title":"Product of Functions",
"link":"Trign/eqT06.html"
},
{
"title":"Powers of Functions",
"link":"Trign/eqT07.html"
},
{
"title":"Euler's Formula",
"link":"Trign/eqT10.html"
},
{
"title":"Allied Angle Table",
"link":"Trign/eqT11.html"
},
{
"title":"Negative Angle Identites",
"link":"Trign/eqT12.html"
}
]
},{
"title": "Laplace",
"data": [
{
"title":"Properties of Laplace Tranform",
"link":"Lapla/eqL01.html"
},
{
"title":"Functions of Laplace Tranform",
"link":"Lapla/eqL02.html"
}
]
},{
"title": "Fourier",
"data": [
{
"title":"Fourier Series",
"link":"Four/eqFour01.html"
},
{
"title":"Fourier Transform Operations",
"link":"Four/eqFour02.html"
},
{
"title":"Table of Fourier Transform",
"link":"Four/eqFour03.html"
}
]
},{
"title": "Series",
"data": [
{
"title":"Arithmetic Series",
"link":"Series/eqS01.html"
},
{
"title":"Geometric Series",
"link":"Series/eqS02.html"
},
{
"title":"Finite Series",
"link":"Series/eqS03.html"
},
{
"title":"Binomial Series",
"link":"Series/eqS04.html"
},
{
"title":"Power Series Expansions",
"link":"Series/eqS05.html"
}
]
},{
"title": "Numerical Methods",
"data": [
{
"title":"Lagrange, Newton's Interpolation",
"link":"Inter/eqIN01.html"
},
{
"title":"Newton's Forward/backward Difference",
"link":"Inter/eqIN02.html"
},
{
"title":"Numerical Integration",
"link":"Inter/eqIN03.html"
},
{
"title":"Roots of Equation",
"link":"Inter/eqIN04.html"
}
]
},{
"title": "Vector Calculas",
"data": [
{
"title":"Vector Identities",
"link":"VectCal/eqVC01.html"
}
]
},{
"title": "Probability",
"data": [
{
"title":"Basic",
"link":"Prob/eqP01.html"
},
{
"title":"Expectation",
"link":"Prob/eqP02.html"
},
{
"title":"Variance",
"link":"Prob/eqP03.html"
},
{
"title":"Distributions",
"link":"Prob/eqP04.html"
},
{
"title":"Permutations",
"link":"Prob/eqP05.html"
},
{
"title":"Combinations",
"link":"Prob/eqP06.html"
}
]
},{
"title": "Beta gamma",
"data": [
{
"title":"Beta Functions",
"link":"beta/eqBeta01.html"
},
{
"title":"Gamma Functions",
"link":"beta/eqBeta02.html"
},
{
"title":"Beta-Gamma Functions",
"link":"beta/eqBeta03.html"
}
]
},{
"title": "Z-Transform",
"data": [
{
"title":"Properties of Z-Transform",
"link":"zTrans/eqZT01.html"
},
{
"title":"Common Pairs",
"link":"zTrans/eqZT02.html"
}
]
}]
}
这是MainActivity.java.I已通过intent传递JSONArray array1。
public static String str1 = null;
public String title2;
static final String TITLE = "title";
//public JSONObject object;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ListView listview = (ListView) findViewById(R.id.listView1);
StringBuffer str = new StringBuffer();
try {
BufferedReader br = new BufferedReader(new InputStreamReader(getAssets().open(
"boardexam.json")));
String temp;
while ((temp = br.readLine()) != null)
str.append(temp);
br.close();
} catch (IOException e) {
e.printStackTrace();
}
String readFile = str.toString();
//String title1;
try {
JSONObject json = new JSONObject(readFile);
JSONArray array = json.getJSONArray("data");
ArrayList<HashMap<String,String>> list = new ArrayList<HashMap<String,String>>();
int l = array.length();
for(int i=0; i<l; i++) {
JSONObject object = array.getJSONObject(i);
final JSONArray array1 = object.getJSONArray("data");
//JSONOBject array2 = array1.get(i);
HashMap<String,String> hashmap = new HashMap<String,String>();
hashmap.put(TITLE,object.getString("title").toString());
// hashmap.put("data", array1.toString());
list.add(hashmap);
Adapter1 arrayAdapter = new Adapter1(MainActivity.this,list);
listview.setAdapter(arrayAdapter);
listview.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
Intent intent = new Intent(MainActivity.this,MainActivity2.class);
Bundle b = new Bundle();
b.putString("data",array1.toString());
intent.putExtras(b);
startActivity(intent);
}
});
}
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
这是MainActivity2.java，我将获得JSONArray。
static final String TITLE = "title";
static final String URL = "url";
private String string;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main_activity2);
ListView listview = (ListView) findViewById(R.id.listView1);
Intent intent = getIntent();
try {
String string = intent.getStringExtra("data");
JSONArray jsonArray = new JSONArray(string);
ArrayList<HashMap<String,String>> list = new ArrayList<HashMap<String,String>>();
int l = jsonArray.length();
for(int i=0; i<l; i++)
{
JSONObject obj = array.getJSONObject(i);
HashMap<String,String> hashmap = new HashMap<String,String>();
hashmap.put(TITLE,obj.getString("title"));
list.add(hashmap);
Adapter1 arrayAdapter = new Adapter1(MainActivity2.this,list);
listview.setAdapter(arrayAdapter);
}
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
这是我的问题。当我在litview中显示这个jsonarray的对象时，它只显示jsonarray的最后一个对象。如何显示jsonarray的完整对象。
{
"title":"Properties of Z-Transform",
"link":"zTrans/eqZT01.html"
},
{
"title":"Common Pairs",
"link":"zTrans/eqZT02.html"
}
答案 0 :(得分：0)
请从MainActivity2
Adapter1 arrayAdapter = new Adapter1(MainActivity2.this,list);
listview.setAdapter(arrayAdapter);
同样的事情MainActivity1使得for for for for循环
Adapter1 arrayAdapter = new Adapter1(MainActivity.this,list);
listview.setAdapter(arrayAdapter);
listview.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
Intent intent = new Intent(MainActivity.this,MainActivity2.class);
Bundle b = new Bundle();
b.putString("data",array1.toString());
intent.putExtras(b);
startActivity(intent);
}
});
答案 1 :(得分：0)
尝试以下代码
String result= YOUR JSON STRING;
try
{
JSONObject jsonObject = new JSONObject(result);
JSONArray jsonArray = jsonObject.getJSONArray("data"); // data array
for(int i=0;i<jsonArray.length();i++) // get all value
{
JSONObject jsonObject2 = jsonArray.getJSONObject(i); // get every json object title and data
String title = jsonObject2.getString("title");
Log.e("title", title);
JSONArray data = jsonObject2.getJSONArray("data");
for(int j=0;j<data.length();j++)
{
String title1 = data.getJSONObject(i).getString("title");
Log.e("title1", title1);
String link = data.getJSONObject(i).getString("link");
Log.e("link", link);
}
}
}
catch(Exception e)
{
}
答案 2 :(得分：0)
将json数组放入String并使用Intent传递给下一个活动，然后在下一个活动中解析它。