gosn 解析

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public class GsonActivity extends Activity {    Button saveButton;    Button loadButton;        @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.gsonlayout);        initControls();    }        protected void initControls(){        saveButton = (Button) findViewById(R.id.btSave);        loadButton = (Button) findViewById(R.id.btGsonLoad);                saveButton.setOnClickListener(new OnClickListener() {                        @Override            public void onClick(View v) {                List<StudentInfo> studentInfos = new LinkedList<StudentInfo>() ;                StudentInfo s1 = new StudentInfo();                s1.setId(1);                s1.setName("张三");                s1.setAddress("武汉市");                s1.setPhone("12345671");                studentInfos.add(s1);                                StudentInfo s2 = new StudentInfo();                s2.setId(2);                s2.setName("李四");                s2.setAddress("华工");                s2.setPhone("12345672");                studentInfos.add(s2);                                 Gson gson = new Gson();                  String json = gson.toJson(studentInfos);                try {                    FileOutputStream fs = openFileOutput("gsonconfig.xml", MODE_PRIVATE);                    fs.write(json.getBytes());                    fs.close();                    Toast.makeText(GsonActivity.this, json, Toast.LENGTH_SHORT).show();                } catch (Exception e) {                    Toast.makeText(GsonActivity.this, e.getMessage(), Toast.LENGTH_SHORT).show();                    e.printStackTrace();                }            }        });                loadButton.setOnClickListener(new OnClickListener() {                        @Override            public void onClick(View v) {                List<StudentInfo> studentInfos = new LinkedList<StudentInfo>();                String json = "";                                try {                    FileInputStream fileInputStream = openFileInput("gsonconfig.xml");                    InputStreamReader inputStreamReader =new InputStreamReader(fileInputStream);                    BufferedReader bufferedReader = new  BufferedReader(inputStreamReader);                                        json = bufferedReader.readLine();                    bufferedReader.close();                                        Gson gson = new    Gson();                    studentInfos = gson.fromJson(json, new TypeToken<List<StudentInfo>>() {                      }.getType());                    for (StudentInfo studentInfo : studentInfos) {                        Toast.makeText(GsonActivity.this, studentInfo.toString(), Toast.LENGTH_SHORT).show();                    }                } catch (Exception e) {                    e.printStackTrace();                }            }        });    }}
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