Do not put everything into onCreate(), try to use AsyncTask class to access content in background.
1. Implement a class to inherent AsynTask class
class RunningAsyncTask extends AsyncTask{
protected void onPreExecute( ) {
// system will call this first
// do whatever view content modification
// just after thread started.
bEndThread = false;
}
protected void onPostExecute( String value ) {
// system will call this when thread finished.
// do whatever view content modification
// before thread finished.
SetAddressText ( value );
bEndThread = true;
}
protected void onProgressUpdate(Integer... values) {
// system will call this when publishProgress( )
// is called in doInBackground( )
// do whatever view content modification
// when the background process.
}
protected String doInBackground(Void... params) {
// CAN NOT DO any modification of view content
// just do any content fetch for longer process time
// Call publishProgress((int) ((i / (float) count) * 100))
// giving a chance to update the view during the process time
String addStr = getCurrentGPSAddress( );
return addStr;
}
}
2. In onResume or onCreate to init the thread (never reentry)
protected void onResume(){
super.onResume( );
if( bEndThread == true);
new RunningAsyncTask().execute();
}
3. Never Never execute a new AsyncTask when the last one is not finished.
我們以完封來慶祝第一個冠軍
