【发布时间】：2017-01-13 12:20:09
【问题描述】：
问题说明：
- 我有四种方法可以从服务器获取所有相关事物的数据：
BankList();
BranchList();
StateDetails();
DistrictDetails();
- 我正在使用 Volley 从服务器中一一获取与银行详细信息相关的数据。并存储到 SQLite 中。
问题：
请检查以下代码
一一调用volley String Request的正确方法是什么。
如何按优先级或自动逐个调用 volley String 请求。
代码运行良好，并将其值存储到 SQLite 中。
但加载程序进度对话框无法正常工作。它冻结应用程序它无法正常工作。它给我输出但应用程序冻结几秒钟如果网络速度像 3G 这样很慢然后它需要更多时间然后我的应用程序将冻结更多时间。所以请帮助我如何避免这种情况
我的问题是我的方式是对还是错。如何一个接一个地调用方法。优先级或自动一个接一个
请检查以下代码
public class LoginPage extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login_page);
BankList();
BranchList();
StateDetails();
DistrictDetails();
}
public void BankList() {
final ProgressDialog pDialog = new ProgressDialog(this);
pDialog.setMessage("Fetching Data");
pDialog.setCancelable(false);
pDialog.show();
StringRequest stringRequest = new StringRequest(Request.Method.POST,
BankURL,
new Response.Listener<String>() {
@Override
public void onResponse(String response) {
pDialog.hide();
result = response;
Log.e("Responce is ", result);
File dbtest = new File(Utils.DB_PATH + Utils.DB_NAME);
if (dbtest.exists()) {
Log.e("db create", "Databse is Created");
String myPath = DB_PATH + DB_NAME;
SQLiteDatabase db = SQLiteDatabase.openDatabase(myPath, null, SQLiteDatabase.OPEN_READWRITE);
db.delete("BankList", null, null);
try {
JSONArray jsonArray = new JSONArray(response);
for (int i = 0; i <= jsonArray.length(); i++) {
JSONObject jsonObject = jsonArray.getJSONObject(i);
int BankID = jsonObject.getInt("BankID");
String BankName = jsonObject.getString("BankName");
Log.e("Bank ID", String.valueOf(BankID));
Log.e("Bank Name", BankName);
ContentValues cv = new ContentValues();
cv.put("BankID", BankID);
cv.put("BankName", BankName);
db.insert("BankList", null, cv);
}
} catch (Exception e) {
}
} else {
Log.e("db Not created ", "Just Inserted Value");
SQLDatabase so = new SQLDatabase(getApplicationContext(), DB_NAME, null, 1);
try {
JSONArray jsonArray = new JSONArray(response);
for (int i = 0; i <= jsonArray.length(); i++) {
JSONObject jsonObject = jsonArray.getJSONObject(i);
int BankID = jsonObject.getInt("BankID");
String BankName = jsonObject.getString("BankName");
Log.e("Bank ID", String.valueOf(BankID));
Log.e("Bank Name", BankName);
so.BankList(BankID, BankName);
}
} catch (Exception e) {
}
}
}
}
, new Response.ErrorListener()
{
@Override
public void onErrorResponse(VolleyError error) {
VolleyLog.d(TAG, "Error: " + error.getMessage());
pDialog.hide();
}
}
)
{
@Override
protected Map<String, String> getParams() {
Map<String, String> params = new HashMap<String, String>();
params.put("getdata", "BankList");
return params;
}
};
// Adding request to request queue
VolleyAppController.getInstance().
addToRequestQueue(stringRequest);
}
public void StateDetails() {
final ProgressDialog pDialog = new ProgressDialog(this);
pDialog.setMessage("Fetching Data");
pDialog.setCancelable(false);
pDialog.show();
StringRequest stringRequest = new StringRequest(Request.Method.POST,
BankURL,
new Response.Listener<String>() {
@Override
public void onResponse(String response) {
pDialog.hide();
result = response;
Log.e("Responce is ", result);
File dbtest = new File(Utils.DB_PATH + Utils.DB_NAME);
if (dbtest.exists()) {
Log.e("db create", "Databse is Created");
String myPath = DB_PATH + DB_NAME;
SQLiteDatabase db = SQLiteDatabase.openDatabase(myPath, null, SQLiteDatabase.OPEN_READWRITE);
db.delete("StateList", null, null);
try {
JSONArray jsonArray = new JSONArray(response);
for (int i = 0; i <= jsonArray.length(); i++) {
JSONObject jsonObject = jsonArray.getJSONObject(i);
int StateID = jsonObject.getInt("StateID");
String StateName = jsonObject.getString("StateName");
int Bank_id = jsonObject.getInt("Bank_id");
ContentValues cv = new ContentValues();
cv.put("StateID", StateID);
cv.put("StateName", StateName);
cv.put("Bank_id", Bank_id);
db.insert("StateList", null, cv);
}
} catch (Exception e) {
}
} else {
Log.e("db Not created ", "Just Inserted Value");
SQLDatabase so = new SQLDatabase(getApplicationContext(), DB_NAME, null, 1);
try {
JSONArray jsonArray = new JSONArray(response);
for (int i = 0; i <= jsonArray.length(); i++) {
JSONObject jsonObject = jsonArray.getJSONObject(i);
int stateId = jsonObject.getInt("StateID");
String stateName = jsonObject.getString("StateName");
int bankID = jsonObject.getInt("Bank_id");
so.StateList(stateId, stateName, bankID);
}
} catch (Exception e) {
}
}
}
}
, new Response.ErrorListener()
{
@Override
public void onErrorResponse(VolleyError error) {
VolleyLog.d(TAG, "Error: " + error.getMessage());
pDialog.hide();
}
}
)
{
@Override
protected Map<String, String> getParams() {
Map<String, String> params = new HashMap<String, String>();
params.put("getdata", "StateList");
return params;
}
};
// Adding request to request queue
VolleyAppController.getInstance().
addToRequestQueue(stringRequest);
}
public void DistrictDetails() {
final ProgressDialog pDialog = new ProgressDialog(this);
pDialog.setMessage("Fetching Data");
pDialog.setCancelable(false);
pDialog.show();
StringRequest stringRequest = new StringRequest(Request.Method.POST,
BankURL,
new Response.Listener<String>() {
@Override
public void onResponse(String response) {
pDialog.hide();
result = response;
Log.e("Responce is ", result);
File dbtest = new File(Utils.DB_PATH + Utils.DB_NAME);
if (dbtest.exists()) {
Log.e("db create", "Databse is Created");
String myPath = DB_PATH + DB_NAME;
SQLiteDatabase db = SQLiteDatabase.openDatabase(myPath, null, SQLiteDatabase.OPEN_READWRITE);
db.delete("DistrictList", null, null);
try {
JSONArray jsonArray = new JSONArray(response);
for (int i = 0; i <= jsonArray.length(); i++) {
JSONObject jsonObject = jsonArray.getJSONObject(i);
int DistrictId = jsonObject.getInt("DistrictId");
String DistrictName = jsonObject.getString("DistrictName");
int StateID = jsonObject.getInt("StateID");
ContentValues cv = new ContentValues();
cv.put("DistrictId", DistrictId);
cv.put("DistrictName", DistrictName);
cv.put("StateID", StateID);
db.insert("DistrictList", null, cv);
}
} catch (Exception e) {
}
} else {
Log.e("db Not created ", "Just Inserted Value");
SQLDatabase so = new SQLDatabase(getApplicationContext(), DB_NAME, null, 1);
try {
JSONArray jsonArray = new JSONArray(response);
for (int i = 0; i <= jsonArray.length(); i++) {
JSONObject jsonObject = jsonArray.getJSONObject(i);
int DistrictId = jsonObject.getInt("DistrictId");
String DistrictName = jsonObject.getString("DistrictName");
int StateID = jsonObject.getInt("StateID");
so.DistrictList(DistrictId, DistrictName, StateID);
}
} catch (Exception e) {
}
}
}
}
, new Response.ErrorListener()
{
@Override
public void onErrorResponse(VolleyError error) {
VolleyLog.d(TAG, "Error: " + error.getMessage());
pDialog.hide();
}
}
)
{
@Override
protected Map<String, String> getParams() {
Map<String, String> params = new HashMap<String, String>();
params.put("getdata", "DistrictList");
return params;
}
};
// Adding request to request queue
VolleyAppController.getInstance().
addToRequestQueue(stringRequest);
}
public void BranchList() {
final ProgressDialog pDialog = new ProgressDialog(this);
pDialog.setMessage("Fetching Data");
pDialog.setCancelable(false);
pDialog.show();
StringRequest stringRequest = new StringRequest(Request.Method.POST,
BankURL,
new Response.Listener<String>() {
@Override
public void onResponse(String response) {
pDialog.hide();
result = response;
Log.e("Responce is ", result);
File dbtest = new File(Utils.DB_PATH + Utils.DB_NAME);
if (dbtest.exists()) {
Log.e("db create", "Databse is Created");
String myPath = DB_PATH + DB_NAME;
SQLiteDatabase db = SQLiteDatabase.openDatabase(myPath, null, SQLiteDatabase.OPEN_READWRITE);
db.delete("BranchList", null, null);
try {
JSONArray jsonArray = new JSONArray(response);
for (int i = 0; i <= jsonArray.length(); i++) {
JSONObject jsonObject = jsonArray.getJSONObject(i);
int BranchID = jsonObject.getInt("BranchID");
String BranchName = jsonObject.getString("BranchName");
String IFSC_code = jsonObject.getString("IFSC_code");
int District_id = jsonObject.getInt("District_id");
ContentValues cv = new ContentValues();
cv.put("BranchID", BranchID);
cv.put("BranchName", BranchName);
cv.put("IFSC_code", IFSC_code);
cv.put("District_id", District_id);
db.insert("BranchList", null, cv);
}
} catch (Exception e) {
}
} else {
Log.e("db Not created ", "Just Inserted Value");
SQLDatabase so = new SQLDatabase(getApplicationContext(), DB_NAME, null, 1);
try {
JSONArray jsonArray = new JSONArray(response);
for (int i = 0; i <= jsonArray.length(); i++) {
JSONObject jsonObject = jsonArray.getJSONObject(i);
int BranchID = jsonObject.getInt("BranchID");
String BranchName = jsonObject.getString("BranchName");
String IFSC_code = jsonObject.getString("IFSC_code");
int District_id = jsonObject.getInt("District_id");
so.BranchList(BranchID, BranchName, IFSC_code, District_id);
}
} catch (Exception e) {
}
}
}
}
, new Response.ErrorListener()
{
@Override
public void onErrorResponse(VolleyError error) {
VolleyLog.d(TAG, "Error: " + error.getMessage());
pDialog.hide();
}
}
)
{
@Override
protected Map<String, String> getParams() {
Map<String, String> params = new HashMap<String, String>();
params.put("getdata", "BranchList");
return params;
}
};
// Adding request to request queue
VolleyAppController.getInstance().addToRequestQueue(stringRequest);
}
}
【问题讨论】：
-
使用接口回调。
-
@DheerubhaiBansal 感谢评论。你能给我举个例子吗？
-
查看此接口示例 - 从那里您可以从同一活动中触发任意数量的请求：stackoverflow.com/questions/28172496/…