早上好,
我已经努力解决这个问题好几天了。我试图获取一些json数据,并将其作为MPandroidChart库的饼图条目。如果我将该库放入onCreate方法中并手动提供输入,而不进行截击,那么该库的工作将非常完美,如下所示:
pie_entry.add(new PieEntry(5, "test"));
但是,当我把它放在volley的onResponse方法中,或者如果我尝试获取条目并将其发送到另一个方法,然后将其添加到pieChart,或者如果我尝试将条目添加到全局veriable,然后添加到图表中,那么它就不起作用了。这是我的代码:
String tag_String_reg = "reg_GetVoteResults";
db = new SQLiteHandler(getApplicationContext());
final HashMap<String, Object> myData;
myData = db.getUserIDAndOrg();
int userID = (int) myData.get(db.KEY_USER_ID);
final String mOrg = (String) myData.get(db.KEY_USER_UID);
StringRequest stringRequest = new StringRequest(Request.Method.POST,
AppConfig.URL_GET_VOTERESULTS, new Response.Listener<String>() {
@Override
public void onResponse(String response) {
try {
JSONArray JArray = new JSONArray(response);
for (int i = 0; i < JArray.length(); i++) {
JSONObject answerInfo = JArray.getJSONObject(i);
String answer = answerInfo.getString("answer");
float vote = answerInfo.getInt("answer_vote");
//vote_count = new ArrayList<>();
//anslist = new ArrayList<>();
//vote_count.add(vote);
//anslist.add(answer);
pie_entry.add(new PieEntry(vote, answer));
}
pie_entry.add(new PieEntry(5, "test"));
pie_entry.add(new PieEntry(7, "test2"));
Log.wtf("current name and int ", pie_entry.toString());
//testing(pie_entry);
//Log.wtf("final result: ", pe.toString());
pieChart.setUsePercentValues(true);
//Log.wtf("inside chart ", pe.toString());
pieChart.getDescription().setEnabled(false);
pieChart.setExtraOffsets(5, 10, 5, 5);
pieChart.setDragDecelerationFrictionCoef(0.95f);
pieChart.setDrawHoleEnabled(true);
pieChart.setHoleColor(WHITE);
pieChart.setTransparentCircleRadius(61f);
PieDataSet dataSet = new PieDataSet(pie_entry, "Voting Results");
dataSet.setSliceSpace(3f);
dataSet.setSelectionShift(5f);
dataSet.setColors(ColorTemplate.JOYFUL_COLORS);
PieData data = new PieData((dataSet));
data.setValueTextSize(10f);
data.setValueTextColor(Color.YELLOW);
pieChart.setData(data);
} catch (JSONException e) {
e.printStackTrace();
Toast.makeText(getApplicationContext(), "Didnt work. Catch. "+ response.toString(), Toast.LENGTH_LONG).show();
Log.d(TAG, "Didnt work. Error : "+e.toString());
}
}
},
new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
if(error.getMessage()==null){
Toast.makeText(getApplicationContext(), " ERROR ", Toast.LENGTH_LONG).show();
}else{
Toast.makeText(getApplicationContext(), "Error. Please check your internet connection. ErrorListener. " + error.getMessage(), Toast.LENGTH_LONG).show();
}
}
}){
@Override
protected Map<String, String> getParams() {
Map<String, String> params = new HashMap<String, String>();
params.put("org_id", mOrg);
params.put("question_id", question_id);
return params;
}
};
AppController.getInstance().addToRequestQueue(stringRequest, tag_String_reg);`
我确信json响应在我用
Log.wtf
任何帮助都将不胜感激。
此外,logcat中没有错误,它只会显示我的日志结果。wtf:
current name and int: [Entry, x: 0.0 y: 1.0, Entry, x: 0.0 y: 1.0, Entry, x: 0.0 y: 5.0, Entry, x: 0.0 y: 7.0]
