旋转屏幕后，总是先计时器开始计数 [英] After rotating screen, always first timer beginning a count
本文介绍了旋转屏幕后，总是先计时器开始计数的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
半个月我试图解决这个问题，它的我的第二个解决方案，我变老错误。
我的目标是编写一个带定时器的ListView与启动和停止按钮，每一行中，旋转屏幕后，所有的计时器应能正常工作，但在pre-解决方案旋转屏幕之后，第一个位置的列表视图如何让时间过去/更低的位置。
至于这两个解决方案的链接，我看到getView（）方法只是逻辑，我肯定是主要的问题就是100％。
Half month i trying fix this problem, its my second solution and i get old error. My goal is to write a listView with timer in every row with Start and Stop buttons, after rotating screen all timers should work correctly, but how in pre-solution after rotation screen, first position in listview get time last/lower position. As for link with these two solution i see just logic of getView() method, and i'm on 100% sure that is the main problem.
任何人可以帮助我这个，我是处于僵局。 code的问题我喜欢：
Can anybody help me with this, i am at an impasse. Problematic piace of code:
if(isItStart.get(position)){
holder.stop.setEnabled(true);
holder.start.setEnabled(false);
handler.postDelayed(updateTimeThread,0);
}
下面是完整的类。
ListView listView;
MyAdapter adapter;
Handler handler;
SQLiteDatabase db;
List<Tracker> trackerList;
Tracker tracker;
List<Boolean> isItStart,historyIsItStart;
List<Long> startTime,historyStartTime;
List<Long> lastPauseList,historyLastPauseList;
List<Long> updateTimeList, historyUpdateTimeList;
List<Long> daysList,historyDayList;
List<Long> hoursList,historyHoursList;
List<Long> minutesList,historyMinutes;
List<Long> secondsList,historySecondsList;
int trackerCount;
static final String LOG_TAG = "myTag";
@TargetApi(Build.VERSION_CODES.HONEYCOMB)
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
handler = new Handler();
db = RemindMe.db;
trackerList = Tracker.getListAll(db);
trackerCount=trackerList.size();
initLists();
for (int i = 0; i < trackerCount; i++) {
startTime.add(0L);
lastPauseList.add(0L);
updateTimeList.add(0L);
daysList.add(0L);
hoursList.add(0L);
minutesList.add(0L);
secondsList.add(0L);
isItStart.add(false);
historyStartTime.add(startTime.get(i));
historyLastPauseList.add(lastPauseList.get(i));
historyUpdateTimeList.add(updateTimeList.get(i));
historyDayList.add(daysList.get(i));
historyHoursList.add(hoursList.get(i));
historyMinutes.add(minutesList.get(i));
historySecondsList.add(secondsList.get(i));
historyIsItStart.add(isItStart.get(i));
}
listView = (ListView)findViewById(R.id.listView);
String[] from = {Tracker.COL_NAME,Tracker.COL_ELAPSED_TIME,Tracker.COL_ELAPSED_TIME,Tracker.COL_ELAPSED_TIME,Tracker.COL_ELAPSED_TIME};
int[] to = {R.id.tvName,R.id.tvDays,R.id.tvHours,R.id.tvMinutes,R.id.tvSeconds};
adapter = new MyAdapter(this,R.layout.list_item,Tracker.getAll(db),from,to,0);
adapter.setViewBinder(new SimpleCursorAdapter.ViewBinder() {
@Override
public boolean setViewValue(View view, Cursor cursor, int columnIndex) {
long day,hour,min,sec;
long time = cursor.getLong(columnIndex);
switch(view.getId()){
case R.id.tvDays:
TextView days = (TextView)view;
days.setText("days");
return true;
case R.id.tvHours:
TextView hours = (TextView)view;
hours.setText("hours");
return true;
case R.id.tvMinutes:
TextView minutes = (TextView)view;
minutes.setText("min");
return true;
case R.id.tvSeconds:
TextView seconds = (TextView)view;
if(time!=0){
sec = time/1000;
seconds.setText(String.valueOf(sec));
}else{
seconds.setText("null");
}
return true;
}
return false;
}
});
listView.setAdapter(adapter);
getSupportLoaderManager().initLoader(1,null,this).forceLoad();
}
void initLists(){
startTime = new ArrayList<Long>(trackerCount);
lastPauseList = new ArrayList<Long>(trackerCount);
updateTimeList = new ArrayList<Long>(trackerCount);
daysList = new ArrayList<Long>(trackerCount);
hoursList = new ArrayList<Long>(trackerCount);
minutesList = new ArrayList<Long>(trackerCount);
secondsList = new ArrayList<Long>(trackerCount);
isItStart = new ArrayList<Boolean>(trackerCount);
historySecondsList = new ArrayList<Long>(trackerCount);
historyMinutes = new ArrayList<Long>(trackerCount);
historyHoursList = new ArrayList<Long>(trackerCount);
historyDayList = new ArrayList<Long>(trackerCount);
historyUpdateTimeList = new ArrayList<Long>(trackerCount);
historyLastPauseList = new ArrayList<Long>(trackerCount);
historyStartTime = new ArrayList<Long>(trackerCount);
historyIsItStart = new ArrayList<Boolean>(trackerCount);
}
@Override
public void onClick(View v) {
Intent intent = new Intent(this,AddTrack.class);
startActivity(intent);
}
@Override
public Loader<Cursor> onCreateLoader(int i, Bundle bundle) {
return new TrackerLoader(this,db);
}
@Override
public void onLoadFinished(Loader<Cursor> loader, Cursor cursor) {
adapter.swapCursor(cursor);
}
@Override
public void onLoaderReset(Loader<Cursor> loader) {
}
static class TrackerLoader extends android.support.v4.content.CursorLoader{
SQLiteDatabase db;
TrackerLoader(Context context,SQLiteDatabase db){
super(context);
this.db=db;
}
@Override
public Cursor loadInBackground() {
return Tracker.getAll(db);
}
}
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
Log.d(LOG_TAG, "onSavedInstanceState---------------------------------------------------------------!");
for (int i = 0; i <trackerCount ; i++) {
historyStartTime.set(i,startTime.get(i));
historyLastPauseList.set(i, lastPauseList.get(i));
historyUpdateTimeList.set(i,updateTimeList.get(i));
historyDayList.set(i, daysList.get(i));
historyHoursList.set(i,hoursList.get(i));
historyMinutes.set(i, minutesList.get(i));
historySecondsList.set(i,secondsList.get(i));
historyIsItStart.set(i, isItStart.get(i));
outState.putSerializable("startTime " + i, historyStartTime.get(i));
outState.putSerializable("lastPause " + i, historyLastPauseList.get(i));
outState.putSerializable("updateTime " + i, historyUpdateTimeList.get(i));
outState.putSerializable("dayList " + i, historyDayList.get(i));
outState.putSerializable("hoursList " + i, historyHoursList.get(i));
outState.putSerializable("minutesList " + i, historyMinutes.get(i));
outState.putSerializable("secondsList " + i, historySecondsList.get(i));
outState.putSerializable("isItStart " + i, historyIsItStart.get(i));
Log.d(LOG_TAG, "startTime " + getTime((Long) outState.getSerializable("startTime " + i)));
Log.d(LOG_TAG, "lastPause " + getTime((Long) outState.getSerializable("lastPause " + i)));
Log.d(LOG_TAG, "updateTime " + getTime((Long) outState.getSerializable("updateTime " + i)));
Log.d(LOG_TAG, "dayList " + getTime((Long) outState.getSerializable("dayList " + i)));
Log.d(LOG_TAG, "hoursList " + getTime((Long) outState.getSerializable("hoursList " + i)));
Log.d(LOG_TAG, "minutesList " + getTime((Long) outState.getSerializable("minutesList " + i)));
Log.d(LOG_TAG, "secondsList " + outState.getSerializable("secondsList " + i));
Log.d(LOG_TAG, "isItStart " + outState.getSerializable("isItStart " + i));
Log.d(LOG_TAG, "position " + i);
Log.d(LOG_TAG,"-----------------------------------!");
}
Log.d(LOG_TAG,"END onSavedInstanceState-------------------------------------------------------------!");
for (int i = 0; i < trackerCount; i++) {
Log.d(LOG_TAG,"secondsList "+i+ " "+secondsList.get(i));
}
}
@Override
protected void onRestoreInstanceState(Bundle savedInstanceState) {
super.onRestoreInstanceState(savedInstanceState);
Log.d(LOG_TAG, "onRestoreInstanceState-------------------------------------------------------!");
for (int i = 0; i <trackerCount ; i++) {
historyStartTime.set(i,(Long)savedInstanceState.getSerializable("startTime "+i));
historyLastPauseList.set(i,(Long)savedInstanceState.getSerializable("lastPause "+i));
historyUpdateTimeList.set(i,(Long)savedInstanceState.getSerializable("updateTime "+i));
historyDayList.set(i,(Long)savedInstanceState.getSerializable("dayList "+i));
historyHoursList.set(i,(Long)savedInstanceState.getSerializable("hoursList "+i));
historyMinutes.set(i,(Long)savedInstanceState.getSerializable("minutesList "+i));
historySecondsList.set(i,(Long)savedInstanceState.getSerializable("secondsList "+i));
historyIsItStart.set(i,(Boolean)savedInstanceState.getSerializable("isItStart "+i));
startTime.set(i,historyStartTime.get(i));
lastPauseList.set(i,historyLastPauseList.get(i));
updateTimeList.set(i,historyUpdateTimeList.get(i));
daysList.set(i,historyDayList.get(i));
hoursList.set(i,historyHoursList.get(i));
minutesList.set(i,historyMinutes.get(i));
secondsList.set(i,historySecondsList.get(i));
isItStart.set(i, historyIsItStart.get(i));
Log.d(LOG_TAG, "startTime " + getTime((Long) savedInstanceState.getSerializable("startTime " + i)));
Log.d(LOG_TAG,"lastPause " + getTime((Long) savedInstanceState.getSerializable("lastPause " + i)));
Log.d(LOG_TAG,"updateTime " + getTime((Long) savedInstanceState.getSerializable("updateTime " + i)));
Log.d(LOG_TAG,"dayList " + getTime((Long) savedInstanceState.getSerializable("dayList " + i)));
Log.d(LOG_TAG,"hoursList " + getTime((Long) savedInstanceState.getSerializable("hoursList " + i)));
Log.d(LOG_TAG,"minutesList " + getTime((Long) savedInstanceState.getSerializable("minutesList " + i)));
Log.d(LOG_TAG, "secondsList " + savedInstanceState.getSerializable("secondsList " + i));
Log.d(LOG_TAG,"isItStart "+savedInstanceState.getSerializable("isItStart " + i));
Log.d(LOG_TAG,"position "+i);
Log.d(LOG_TAG,"----------------------------------------------------------------");
}
Log.d(LOG_TAG,"END onRestoreIntstanceState-------------------------------------------------------------!");
}
private class MyAdapter extends SimpleCursorAdapter{
Context context;
@TargetApi(Build.VERSION_CODES.HONEYCOMB)
MyAdapter(Context context,int resourceID,Cursor cursor,String[] from,int[]to,int flags){
super(context, resourceID, cursor, from, to, flags);
this.context = context;
}
@Override
public View getView(final int position, View convertView, final ViewGroup parent) {
View row = convertView;
final ViewHolder holder;
tracker = trackerList.get(position);
if(row==null){
holder = new ViewHolder();
LayoutInflater inflater = ((Activity)context).getLayoutInflater();
row = inflater.inflate(R.layout.list_item,parent,false);
holder.name= (TextView)row.findViewById(R.id.tvName);
holder.days = (TextView)row.findViewById(R.id.tvDays);
holder.hours = (TextView)row.findViewById(R.id.tvHours);
holder.minutes = (TextView)row.findViewById(R.id.tvMinutes);
holder.seconds = (TextView)row.findViewById(R.id.tvSeconds);
holder.start = (Button)row.findViewById(R.id.btStart);
holder.stop = (Button)row.findViewById(R.id.btStop);
row.setTag(holder);
}else{
holder = (ViewHolder)row.getTag();
}
holder.start.setEnabled(true);
holder.stop.setEnabled(false);
holder.name.setText(tracker.getName());
final Runnable updateTimeThread = new Runnable() {
@Override
public void run() {
updateTimeList.set(position, (System.currentTimeMillis() - startTime.get(position)) + lastPauseList.get(position));
secondsList.set(position, updateTimeList.get(position) / 1000);
minutesList.set(position, secondsList.get(position) / 60);
hoursList.set(position, minutesList.get(position) / 60);
secondsList.set(position, (secondsList.get(position) % 60));
minutesList.set(position, (minutesList.get(position) % 60));
hoursList.set(position, (hoursList.get(position) % 24));
holder.days.setText(String.format("%04d", daysList.get(position)));
holder.hours.setText(String.format("%02d", hoursList.get(position)));
holder.minutes.setText(String.format("%02d", minutesList.get(position)));
holder.seconds.setText(String.format("%02d", secondsList.get(position)));
handler.postDelayed(this, 0);
}
};
if(isItStart.get(position)){
holder.stop.setEnabled(true);
holder.start.setEnabled(false);
handler.postDelayed(updateTimeThread,0);
}
View.OnClickListener onClickListener = new View.OnClickListener() {
@Override
public void onClick(View v) {
switch (v.getId()){
case R.id.btStart:
startTime.set(position,System.currentTimeMillis());
handler.post(updateTimeThread);
holder.start.setEnabled(false);
holder.stop.setEnabled(true);
isItStart.set(position,true);
break;
case R.id.btStop:
lastPauseList.set(position, updateTimeList.get(position));
handler.removeCallbacks(updateTimeThread);
holder.stop.setEnabled(false);
holder.start.setEnabled(true);
isItStart.set(position,false);
break;
}
}
};
holder.start.setOnClickListener(onClickListener);
holder.stop.setOnClickListener(onClickListener);
return row;
}
class ViewHolder{
TextView name,days,hours,minutes,seconds;
Button start,stop;
}
}
String getTime(long time){
int hours = (int)(time/3600000);
int minutes = (int)(time -hours*3600000)/60000;
int seconds = (int)(time-hours*3600000-minutes*60000)/1000;
String hour = (hours<9?"0"+hours:hours).toString();
String min = (minutes<9?"0"+minutes:minutes).toString();
String sec = (seconds<9?"0"+seconds:seconds).toString();
return ""+hour+":"+min+":"+sec;
}
}
推荐答案
添加的android：configChanges =方向|屏幕尺寸在的manifest.xml和删除您OnRestore中和onSaved
Add android:configChanges="orientation|screenSize" in manifest.xml and delete your onRestore and onSaved.
这篇关于旋转屏幕后，总是先计时器开始计数的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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