java 如何将 JSONObject 从 doInBackground() 方法返回到 AsyncTask 上的 onPostExecute() 方法？
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How to return JSONObject from doInBackground() method to onPostExecute() method on AsyncTask?
提问by Dhana
In Android app i want to return JSONObject from doInBackground()method to onPostExecute()method.
Here is the code:
在 Android 应用程序中，我想从doInBackground()方法到onPostExecute()方法返回 JSONObject 。
这是代码：
private class AddAsyncTask extends AsyncTask<String, Void, String>
{
JSONObject jsonObjRecv;
String result;
@Override
protected JSONObject doInBackground(JSONObject... params) {
AssetObj assetObj = new AssetObj();
assetObj.setAssetName(txtname.getText().toString());
assetObj.setMobileNo(txtmobile.getText().toString());
assetObj.setOwnerId(myApp.getOwnerId());
assetObj.setStartTime(startTime.getText().toString());
assetObj.setEndTime(endTime.getText().toString());
assetObj.setInterval(interval.getText().toString());
JSONObject jsonObjRecv = SyncService.AddNewAssetRequest(assetObj);
return jsonObjRecv;
}
protected void onPostExecute(JSONObject obj){
if(obj != null)
{
//do something
}
I have try this code i got error. Is it possible to return JSONObject from doInBackground()method to onPostExecute()method?
我试过这个代码我得到了错误。是否可以从doInBackground()方法到onPostExecute()方法返回 JSONObject ？
采纳答案by Kartihkraj Duraisamy
Edited:
编辑：
This could Help you,
这可以帮助你，
private class AddAsyncTask extends AsyncTask<String, Void, JSONOnject>
{
JSONObject jsonObjRecv;
String result;
@Override
protected JSONObject doInBackground(String... params) {
AssetObj assetObj = new AssetObj();
assetObj.setAssetName(txtname.getText().toString());
assetObj.setMobileNo(txtmobile.getText().toString());
assetObj.setOwnerId(myApp.getOwnerId());
assetObj.setStartTime(startTime.getText().toString());
assetObj.setEndTime(endTime.getText().toString());
assetObj.setInterval(interval.getText().toString());
JSONObject jsonObjRecv = SyncService.AddNewAssetRequest(assetObj);
}
protected void onPostExecute(JSONObject obj){
if(obj != null)
{
//do something
}
Here is it clearly ,
这里很清楚，
private class AddAsyncTask extends AsyncTask<What type of input you need to pass to doInBackground(), Void, What type of return value you need to return to onPostExcute()>
Probably you dont need to change return values and params in the method declaration.
可能您不需要更改方法声明中的返回值和参数。
Just create the following line
只需创建以下行
private class AddAsyncTask extends AsyncTask<String, Void, JSONOnject>
the methods will be created automatically according to the params and return types you mentioned in
这些方法将根据您提到的参数和返回类型自动创建
private class AddAsyncTask extends AsyncTask<String, Void, JSONOnject>
回答by user370305
OK, Now look at this carefully,
好的，现在仔细看看这个，
private class AddAsyncTask extends AsyncTask<String, Void, String>
In your AsyncTask third Parameter is StringSo change it to JSONObject.
在您的 AsyncTask 中，第三个参数是String因此将其更改为JSONObject.
like,
喜欢，
private class AddAsyncTask extends AsyncTask<String, Void, JSONObject>
回答by san
Instead of
代替
private class AddAsyncTask extends AsyncTask<String, Void, String>
change to
改成
private class AddAsyncTask extends AsyncTask<String, Void, JsonObject>
The Actual Code
实际代码
private class AddAsyncTask extends AsyncTask<String, Void, JSONOnject>
{
JSONObject jsonObjRecv;
String result;
@Override
protected JSONObject doInBackground(JSONObject... params) {
AssetObj assetObj = new AssetObj();
assetObj.setAssetName(txtname.getText().toString());
assetObj.setMobileNo(txtmobile.getText().toString());
assetObj.setOwnerId(myApp.getOwnerId());
assetObj.setStartTime(startTime.getText().toString());
assetObj.setEndTime(endTime.getText().toString());
assetObj.setInterval(interval.getText().toString());
JSONObject jsonObjRecv = SyncService.AddNewAssetRequest(assetObj);
}
protected void onPostExecute(JSONObject obj){
if(obj != null)
{
//do something
}
}
}
AsyncTask < Params, Progress, Result >
AsyncTask <参数、进度、结果>
- Params, the type of the parameters sent to the task upon execution.
- Progress, the type of the progress units published during the background computation.
- Result, the type of the result of the background computation
- 参数，执行时发送到任务的参数类型。
- Progress，在后台计算期间发布的进度单元的类型。
- Result，后台计算结果的类型
回答by sujith
For AsyncTask<T1, T2, T3>pass T3as JSONObject
对于AsyncTask<T1, T2, T3>通T3作为JSONObject
