內部類可以訪問但不能更新值-AsyncTask我正在嘗試用Android的AsyncTask..類(稱為解壓縮)是Unzip其中解壓縮本身是一個非活動類。偽碼是：public class Unzip {
private String index;
private String unzipDest; //destination file for storing folder.
private Activity activity;
private boolean result; //result of decompress.
public void unzip(String loc) {
Decompress workThread = new Decompress(loc, activity);
workThread.execute();
if(unzip operation was successful) {
display(index);
}
//Class Decompress:class Decompress extends AsyncTask<Void, Integer, Boolean> {
private ProgressDialog pd = null;
private Context mContext;
private String loc;
private int nEntries;
private int entriesUnzipped;
public Decompress(String location, Context c) {
loc = location;
mContext = c;
nEntries = 0;
entriesUnzipped = 0;
Log.v(this.toString(), "Exiting decompress constructor.");
}
@Override
protected void onPreExecute() {
Log.v(this.toString(), "Inside onPreExecute.");
pd = new ProgressDialog(mContext);
pd.setTitle("Unzipping folder.");
pd.setMessage("Unzip in progress.");
pd.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
Log.v(this.toString(), "Showing dialog and exiting.");
pd.show();
}我所面臨的問題：1.的價值unzipDest和index，更新到doInBackground，保持空到Unzip以及它所有的目標。如何確保這些值保持更新？2.我知道doInBackplace發生在一個與主UI線程分離的線程中。這是否意味著，一旦線程返回，新線程中更新的任何值都將丟失嗎？
3 回答
慕仙森
TA貢獻1827條經驗 獲得超8個贊
如何確保這些值保持更新？
AsyncTaskinterface
這是否意味著，一旦線程返回，新線程中更新的任何值都將丟失嗎？
AsyncTask
interfaceonPostExecute()null
編輯
Activityinterfaceimplements AsyncResponseActivityinterface class
public class MainActivity implements AsyncResponse{Activityvoid processFinish(String output);)
@Override
void processFinish(String output){ // using same params as onPostExecute()
//this you will received result fired from async class of onPostExecute(result) method.
}onPostExecute()delegate.processFinish(result);delegateAsyncResponse
public class AasyncTask extends AsyncTask{public AsyncResponse delegate=null;
@Override
protected void onPostExecute(String result) {
delegate.processFinish(result);
}Interface
大話西游666
TA貢獻1817條經驗 獲得超14個贊
indexworkThread.execute()AsyncResponse
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