我试图根据片段的滑动更新进度条，完全有三个片段和三个循环进度条，即时取得进度条以及测试值没有问题，但我没有得到片段显示，这是代码，请让我知道我错在哪里。
public class History extends Fragment {
final int PAGE_COUNT = 3;
private String tabTitles[] = new String[]{"Tab1", "Tab2", "Tab3"};
public static final String ARG_PAGE = "ARG_PAGE";
private static final int NUM_PAGES = 3;
String medicinename,medicinepercentage,numberdosages,time;
String date,day,daypercentage;
String month,monthdata;
/**
* The pager widget, which handles animation and allows swiping horizontally to access previous
* and next wizard steps.
*/
private ViewPager mPager;
/**
* The pager adapter, which provides the pages to the view pager widget.
*/
private PagerAdapter mPagerAdapter;
private int selectedPage; // set selected page
// TODO: Rename parameter arguments, choose names that match
// the fragment initialization parameters, e.g. ARG_ITEM_NUMBER
private static final String ARG_PARAM1 = "param1";
private static final String ARG_PARAM2 = "param2";
DonutProgress dp;
DonutProgress dp2;
DonutProgress dp3;
public static History newInstance(int page) {
Log.e("History ", String.valueOf(page));
Bundle args = new Bundle();
args.putInt(ARG_PAGE, page);
History fragment = new History();
fragment.setArguments(args);
return fragment;
}
// TODO: Rename and change types of parameters
private String mParam1;
private String mParam2;
public History() {
// Required empty public constructor
}
/**
* Use this factory method to create a new instance of
* this fragment using the provided parameters.
*
* @param param1 Parameter 1.
* @param param2 Parameter 2.
* @return A new instance of fragment History.
*/
// TODO: Rename and change types and number of parameters
public static History newInstance(String param1, String param2) {
Log.e("History2 ", param1+param2);
History fragment = new History();
Bundle args = new Bundle();
args.putString(ARG_PARAM1, param1);
args.putString(ARG_PARAM2, param2);
fragment.setArguments(args);
return fragment;
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
final View v = inflater.inflate(R.layout.fragment_history, container, false);
dp = (DonutProgress) v.findViewById(R.id.donut_progress1);
dp2 = (DonutProgress) v.findViewById(R.id.donut_progress2);
dp3 = (DonutProgress) v.findViewById(R.id.donut_progress3);
new Progress(100).execute();
new Progress2(20).execute();
new Progress3(30).execute();
new Progress(40).execute();
new Progress2(50).execute();
new Progress3(90).execute();
new Progress(50).execute();
new Progress2(10).execute();
new Progress3(30).execute();
/* new Progress(0).execute();
new Progress2(0).execute();
new Progress3(0).execute();*/
if (getArguments() != null)
{
mParam1 = getArguments().getString(ARG_PARAM1);
mParam2 = getArguments().getString(ARG_PARAM2);
}
mPager = (ViewPager) v.findViewById(pager); //the UI pager
mPagerAdapter = new ScreenSlidePagerAdapter(getFragmentManager()) {
@Override
public int getCount()
{
return 0;
}
@Override
public boolean isViewFromObject(View view, Object object) {
return false;
}
};
mPager.setAdapter(mPagerAdapter);
// mPager.setPageTransformer(true, new RotateDownTransformer()); //set the animation
selectedPage = 0; //current page
if (savedInstanceState != null) { //if app was paused, you can reopen the same page
selectedPage = savedInstanceState.getInt("SELECTED_PAGE");
}
selectedPage = 1; //current page
if (savedInstanceState != null) { //if app was paused, you can reopen the same page
selectedPage = savedInstanceState.getInt("SELECTED_PAGE");
}
selectedPage = 2; //current page
if (savedInstanceState != null) { //if app was paused, you can reopen the same page
selectedPage = savedInstanceState.getInt("SELECTED_PAGE");
}
mPager.setCurrentItem(selectedPage);
mPager.setOffscreenPageLimit(0);
//set the current page
mPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener()
{
public void onPageScrollStateChanged(int state) {}
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {}
public void onPageSelected(int position)
{
// Check if this is the page you want.
getItem(position);
Log.e("Started","hello");
}
public Fragment getItem(int position) {
int i = 0;
switch (position) {
case 0: { // Fragment # 0 - This will show FirstFragment
if (!(i < 3)) {
}
++i;
return SlideFragment.newInstance(String.valueOf(0), " ");
}
case 1: { // Fragment # 1 - This will show SecondFragment
Log.e("Fragment", "Fragment 2");
if (!(i < 3)) {
/*new Progress(40).execute();
new Progress2(50).execute();
new Progress3(90).execute();*/
}
++i;
return Slidetwo.newInstance(String.valueOf(1), " ");
}
case 2: { // Fragment # 1 - This will show SecondFragment
Log.e("Fragment", "Fragment 3");
if (!(i < 3)) {
/* new Progress(50).execute();
new Progress2(10).execute();
new Progress3(0).execute();*/
}
++i;
return SlideThree.newInstance(String.valueOf(2), " ");
}
default:
return null;
}
}
});
return v;
}
class Progress extends AsyncTask<Void, Integer, Integer>
{
int dummyVariable = 0;
Progress(int dummyVariable)
{
this.dummyVariable = dummyVariable;
}
@Override
protected void onPreExecute() {
super.onPreExecute();
dp.setMax(100);
// Progress.getIndeterminateDrawable().setColorFilter(Color.parseColor("#C0D000"), android.graphics.PorterDuff.Mode.SRC_ATOP);
}
@Override
protected Integer doInBackground(Void... params)
{
for (int i = 0; i <= dummyVariable; i++)
{
publishProgress(i);
try
{
Thread.sleep(20);
}
catch (InterruptedException ie)
{
ie.printStackTrace();
}
}
return null;
}
@Override
protected void onProgressUpdate(Integer... values) {
super.onProgressUpdate(values);
dp.setProgress(values[0]);
}
@Override
protected void onPostExecute(Integer integer) {
super.onPostExecute(integer);
}
}
class Progress2 extends AsyncTask<Void, Integer, Integer> {
int dummyVariable =0;
Progress2(int dummyVariable)
{
this.dummyVariable = dummyVariable;
}
@Override
protected void onPreExecute() {
super.onPreExecute();
dp2.setMax(100);
}
@Override
protected Integer doInBackground(Void... params) {
for (int i = 0; i <= dummyVariable; i++) {
publishProgress(i);
try {
Thread.sleep(20);
}
catch (InterruptedException ie)
{
ie.printStackTrace();
}
}
return null;
}
@Override
protected void onProgressUpdate(Integer... values) {
super.onProgressUpdate(values);
dp2.setProgress(values[0]);
}
@Override
protected void onPostExecute(Integer integer) {
super.onPostExecute(integer);
}
}
class Progress3 extends AsyncTask<Void, Integer, Integer>
{
int dummyVariable =0;
Progress3(int dummyVariable)
{
this.dummyVariable = dummyVariable;
}
@Override
protected void onPreExecute()
{
super.onPreExecute();
dp3.setMax(100);
}
@Override
protected Integer doInBackground(Void... params)
{
for (int i = 0; i <= dummyVariable; i++) {
publishProgress(i);
try
{
Thread.sleep(20);
}
catch (InterruptedException ie)
{
ie.printStackTrace();
}
}
return null;
}
@Override
protected void onProgressUpdate(Integer... values) {
super.onProgressUpdate(values);
dp3.setProgress(values[0]);
}
@Override
protected void onPostExecute(Integer integer) {
super.onPostExecute(integer);
}
}
private class ScreenSlidePagerAdapter extends PagerAdapter {
public ScreenSlidePagerAdapter(Object fragmentManager) {
}
@Override
public int getCount() {
return 0;
}
@Override
public boolean isViewFromObject(View view, Object object) {
return false;
}
}
// TODO: Rename method, update argument and hook method into UI event
}
`