这个问题在这里已经有一个答案：>
Sending and Parsing JSON Objects11
我有以下文本文件到我的SdCard.now我想通过Json解析器解析这个文件,我想解析并读取这个文件并将数据显示在我的文本视图中,我该怎么做？
我有以下文本文件到我的SdCard.now我想通过Json解析器解析这个文件,我想解析并读取这个文件并将数据显示在我的文本视图中,我该怎么做？
{
"data": [
{
"id": "1","title": "Farhan Shah","duration": 10,},{
"id": "2","title": "Noman Shah",{
"id": "3","title": "Ahmad Shah",{
"id": "4","title": "Mohsin Shah",{
"id": "5","title": "Haris Shah",}
]
}
这是代码：
File sdcard = Environment.getExternalStorageDirectory();
//Get the text file
File file = new File(sdcard,"textarabics.txt");
String UTF8 = "utf8";
int BUFFER_SIZE = 8192;
//Read text from file
StringBuilder text = new StringBuilder();
我得到的文件,但现在我不知道我如何解析数据？
解决方法
使用
File从SD卡读取JSON文件,并使用
JSONObject进行解析.
这里有一个起始码：
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
public class ReadJsonFile {
public ReadFile (){
try {
File yourFile = new File(Environment.getExternalStorageDirectory(),"path/to/the/file/inside_the_sdcard/textarabics.txt");
FileInputStream stream = new FileInputStream(yourFile);
String jsonStr = null;
try {
FileChannel fc = stream.getChannel();
MappedByteBuffer bb = fc.map(FileChannel.MapMode.READ_ONLY,fc.size());
jsonStr = Charset.defaultCharset().decode(bb).toString();
}
catch(Exception e){
e.printStackTrace();
}
finally {
stream.close();
}
/* String jsonStr = "{\n\"data\": [\n {\n \"id\": \"1\",\n \"title\": \"Farhan Shah\",\n \"duration\": 10\n },\n {\n \"id\": \"2\",\n \"title\": \"Noman Shah\",\n {\n \"id\": \"3\",\n \"title\": \"Ahmad Shah\",\n {\n \"id\": \"4\",\n \"title\": \"Mohsin Shah\",\n {\n \"id\": \"5\",\n \"title\": \"Haris Shah\",\n \"duration\": 10\n }\n ]\n\n}\n";
*/
JSONObject jsonObj = new JSONObject(jsonStr);
// Getting data JSON Array nodes
JSONArray data = jsonObj.getJSONArray("data");
// looping through All nodes
for (int i = 0; i < data.length(); i++) {
JSONObject c = data.getJSONObject(i);
String id = c.getString("id");
String title = c.getString("title");
String duration = c.getString("duration");
//use > int id = c.getInt("duration"); if you want get an int
// tmp hashmap for single node
HashMap<String,String> parsedData = new HashMap<String,String>();
// adding each child node to HashMap key => value
parsedData.put("id",id);
parsedData.put("title",title);
parsedData.put("duration",duration);
// do what do you want on your interface
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
不要忘记在你的主播上添加读取存储：
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
