我正在学习 Java，并且正在尝试制作一个 Fortnite 统计跟踪应用程序。我正在使用 Fortnite 跟踪器 API 和 JsonReader 来读取返回的键和值。这工作正常，但问题是像“杀戮”等统计数据是嵌套的，我不确定如何阅读这些数据。
我可以使用 JsonReader 读取嵌套的键和值吗？
我试过 JSONObject 但我不完全确定我是否正确使用它，所以我没有走得太远。
{ "accountId": "c48bb072-f321-4572-9069-1c551d074949", "platformId": 1, "platformName": "xbox", "platformNameLong": "Xbox", "epicUserHandle": "playername", "stats": {
"p2": {
"trnRating": {
"label": "TRN Rating",
"field": "TRNRating",
"category": "Rating",
"valueInt": 1,
"value": "1",
"rank": 852977,
"percentile": 100.0,
"displayValue": "1"
},
"score": {
"label": "Score",
"field": "Score",
"category": "General",
"valueInt": 236074,
"value": "236074",
"rank": 6535595,
"percentile": 3.0,
"displayValue": "236,074"
}
上面是我拉取的信息样本，大家可以看看结构
public class MainActivity extends AppCompatActivity {
TextView tv;
TextView tv2;
TextView tv3;
Button submit;
EditText tbplatform;
EditText tbhandle;
String TAG = "TESTRUN";
String id = "";
InputStreamReader responseBodyReader;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
tv = (TextView) findViewById(R.id.tvOne);
tv2 = (TextView) findViewById(R.id.tvTwo);
tv3 = (TextView) findViewById(R.id.tvThree);
submit = (Button) findViewById(R.id.btnSubmit);
tbplatform = (EditText) findViewById(R.id.tbPlatform);
tbhandle = (EditText) findViewById(R.id.tbHandle);
submit.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
final String platform = String.valueOf(tbplatform.getText());
final String username = String.valueOf(tbhandle.getText());
AsyncTask.execute(new Runnable() {
@Override
public void run() {
// All your networking logic
// should be here
// Create URL
URL githubEndpoint = null;
try {
githubEndpoint = new URL("https://api.fortnitetracker.com/v1/profile/" + platform+ "/" + username);
} catch (MalformedURLException e) {
e.printStackTrace();
}
// Create connection
HttpsURLConnection myConnection = null;
try {
myConnection =
(HttpsURLConnection) githubEndpoint.openConnection();
} catch (IOException e) {
e.printStackTrace();
}
myConnection.setRequestProperty("TRN-Api-Key", "API_KEY_HERE");
try {
if (myConnection.getResponseCode() == 200) {
InputStream responseBody = myConnection.getInputStream();
responseBodyReader =
new InputStreamReader(responseBody, "UTF-8");
JsonReader jsonReader = new JsonReader(responseBodyReader);
jsonReader.beginObject(); // Start processing the JSON object
while (jsonReader.hasNext()) { // Loop through all keys
final String key = jsonReader.nextName(); // Fetch the next key
//Log.v(TAG, key);
if (key.equals("epicUserHandle") || key.equals("platformName") || key.equals("accountId")) { // Check if desired key
// Fetch the value as a String
final String value = jsonReader.nextString();
if (key.equals("epicUserHandle")) {
Log.v(TAG, "Gamertag: " + value);
}
if (key.equals("platformName")) {
Log.v(TAG, "Console: " + value);
}
if (key.equals("stats")) {
Log.v(TAG, "Kills: " + value);
}
runOnUiThread(new Runnable() {
@Override
public void run() {
//stuff that updates ui
if(key.equals("epicUserHandle")) {
tv.setText("Username: " + value);
}
if(key.equals("platformName")) {
tv2.setText("Platform: " +value);
}
if(key.equals("accountId")) {
tv3.setText("Account ID: " +value);
}
}
});
//Log.v(TAG, "" +value);
// Do something with the value
// ...
//break; // Break out of the loop
} else {
jsonReader.skipValue(); // Skip values of other keys
}
}
jsonReader.close();
myConnection.disconnect();
} else {
// Error handling code goes here
}
} catch (IOException e) {
e.printStackTrace();
}
}
});
}
});
}
}
最佳答案
我想这可能对你有帮助
You Need To Create Some Classes As Given Below
class Score implements Serializable {
private String label;
private String field;
private String category;
private Integer valueInt;
private String value;
private Integer rank;
private Double percentile;
private String displayValue;
public Score() {
this("", "", "", 0, "", 0, 0.0, "");
}
public Score(String label, String field,
String category, Integer valueInt,
String value, Integer rank,
Double percentile, String displayValue) {
this.label = label;
this.field = field;
this.category = category;
this.valueInt = valueInt;
this.value = value;
this.rank = rank;
this.percentile = percentile;
this.displayValue = displayValue;
}
public String getLabel() {
return label;
}
public void setLabel(String label) {
this.label = label;
}
public String getField() {
return field;
}
public void setField(String field) {
this.field = field;
}
public String getCategory() {
return category;
}
public void setCategory(String category) {
this.category = category;
}
public Integer getValueInt() {
return valueInt;
}
public void setValueInt(Integer valueInt) {
this.valueInt = valueInt;
}
public String getValue() {
return value;
}
public void setValue(String value) {
this.value = value;
}
public Integer getRank() {
return rank;
}
public void setRank(Integer rank) {
this.rank = rank;
}
public Double getPercentile() {
return percentile;
}
public void setPercentile(Double percentile) {
this.percentile = percentile;
}
public String getDisplayValue() {
return displayValue;
}
public void setDisplayValue(String displayValue) {
this.displayValue = displayValue;
}
}
class TRNRating implements Serializable {
private String label;
private String field;
private String category;
private Integer valueInt;
private String value;
private Integer rank;
private Double percentile;
private String displayValue;
public TRNRating() {
this("", "", "", 0, "", 0, 0.0, "");
}
public TRNRating(String label, String field,
String category, Integer valueInt,
String value, Integer rank,
Double percentile, String displayValue) {
this.label = label;
this.field = field;
this.category = category;
this.valueInt = valueInt;
this.value = value;
this.rank = rank;
this.percentile = percentile;
this.displayValue = displayValue;
}
public String getLabel() {
return label;
}
public void setLabel(String label) {
this.label = label;
}
public String getField() {
return field;
}
public void setField(String field) {
this.field = field;
}
public String getCategory() {
return category;
}
public void setCategory(String category) {
this.category = category;
}
public Integer getValueInt() {
return valueInt;
}
public void setValueInt(Integer valueInt) {
this.valueInt = valueInt;
}
public String getValue() {
return value;
}
public void setValue(String value) {
this.value = value;
}
public Integer getRank() {
return rank;
}
public void setRank(Integer rank) {
this.rank = rank;
}
public Double getPercentile() {
return percentile;
}
public void setPercentile(Double percentile) {
this.percentile = percentile;
}
public String getDisplayValue() {
return displayValue;
}
public void setDisplayValue(String displayValue) {
this.displayValue = displayValue;
}
}
class P2 implements Serializable {
private TRNRating trnRating;
private Score score;
public P2() {
this(new TRNRating(), new Score());
}
public P2(TRNRating trnRating, Score score) {
this.trnRating = trnRating;
this.score = score;
}
public TRNRating getTrnRating() {
return trnRating;
}
public void setTrnRating(TRNRating trnRating) {
this.trnRating = trnRating;
}
public Score getScore() {
return score;
}
public void setScore(Score score) {
this.score = score;
}
}
class Stats implements Serializable {
private P2 p2;
public Stats() {
this(new P2());
}
public Stats(P2 p2) {
this.p2 = p2;
}
}
//You Need To Change Name Of This Class
class Response implements Serializable {
private String accountId;
private Integer platformId;
private String platformName;
private String platformNameLong;
private String epicUserHandle;
private Stats stats;
public Response() {
this("", 0, "", "", "", new Stats());
}
public Response(String accountId, Integer platformId,
String platformName, String platformNameLong,
String epicUserHandle, Stats stats) {
this.accountId = accountId;
this.platformId = platformId;
this.platformName = platformName;
this.platformNameLong = platformNameLong;
this.epicUserHandle = epicUserHandle;
this.stats = stats;
}
public String getAccountId() {
return accountId;
}
public void setAccountId(String accountId) {
this.accountId = accountId;
}
public Integer getPlatformId() {
return platformId;
}
public void setPlatformId(Integer platformId) {
this.platformId = platformId;
}
public String getPlatformName() {
return platformName;
}
public void setPlatformName(String platformName) {
this.platformName = platformName;
}
public String getPlatformNameLong() {
return platformNameLong;
}
public void setPlatformNameLong(String platformNameLong) {
this.platformNameLong = platformNameLong;
}
public String getEpicUserHandle() {
return epicUserHandle;
}
public void setEpicUserHandle(String epicUserHandle) {
this.epicUserHandle = epicUserHandle;
}
public Stats getStats() {
return stats;
}
public void setStats(Stats stats) {
this.stats = stats;
}
}
If your response is same as explained in question. Then this will work.
//In your code after status check you need to do like this
if (myConnection.getResopnseCode() == 200) {
BufferedReader br=new BufferedReader(responseBodyReader);
String read = null, entireResponse = "";
StringBuffer sb = new StringBuffer();
while((read = br.readLine()) != null) {
sb.append(read);
}
entireResponse = sb.toString();
//You need to change name of response class
Response response = new Gson().fromJson(entireResponse , Response.class);
}
关于java - 如何使用 JsonReader 解析嵌套的键和值？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/49752576/