已解决 - Android ViewPager 和 TabLayout 运行不快 [英] Solved - Android ViewPager and TabLayout are not working fast
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问题描述
有 TabLayout 和 ViewPager 的嵌套片段.每个片段内部都有列表视图，因此它们可以一起调用，现在我遇到了应用程序处理速度慢的问题.我尝试了一些解决方案，例如 volley library，但它对我不起作用.有关更多信息，我也发布了我的代码，所以请指导我做到最好.
There are nested fragments with TabLayout and ViewPager. Each fragment has listview inside it so they get call together and now I'm getting an issue of slow processing of app. I have tried some solutions like volley library but it didn't work for me. For more I'm posting my code too so please guide me to make it best.
MainTabFragment.java
MainTabFragment.java
public class MainTabFragment extends Fragment {
public static int position_child_tab = 0, three_childs_tab_position = 0;
static int count = -1;
int position_tab = 0;
Bundle args;
MyTabLayout myTabLayout;
public MainTabFragment() {
// 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 MainTabFragment.
*/
// TODO: Rename and change types and number of parameters
public static MainTabFragment newInstance(String param1, String param2) {
return new MainTabFragment();
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.main_tab_fragment, container, false);
myTabLayout = (MyTabLayout) view.findViewById(R.id.mainTabLayout);
NonSiwpablePager pager = (NonSiwpablePager) view.findViewById(R.id.pager);
args = getArguments();
if (args != null && args.containsKey("pos_next"))
position_tab = args.getInt("pos_next");
if (args != null && args.containsKey("pos_end"))
position_child_tab = args.getInt("pos_end");
if (position_child_tab != 3) {
three_childs_tab_position = position_child_tab;
} else {
three_childs_tab_position = 0;
}
args = new Bundle();
args.putInt("pos_end", position_child_tab);
ViewPagerAdapter mAdapter = getViewPagerAdapter();
pager.setAdapter(mAdapter);
pager.setOffscreenPageLimit(4);
myTabLayout.setupWithViewPager(pager);
for (int i = 0; i < mAdapter.getCount(); i++) {
View customView = mAdapter.getCustomeView(getActivity(), i);
myTabLayout.getTabAt(i).setCustomView(customView);
}
pager.setCurrentItem(position_tab);
return view;
}
@Override
public void onViewCreated(View view, Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
myTabLayout.getTabAt(position_tab).getCustomView().setSelected(true);
}
private ViewPagerAdapter getViewPagerAdapter() {
ViewPagerAdapter mAdapter = new ViewPagerAdapter(getChildFragmentManager());
String title_arr[] = {"ADVISORY", "TOP ADVISORS", "EXPERT VIEW"};
for (int i = 0; i < title_arr.length; i++) {
Map<String, Object> map = new Hashtable<>();
map.put(ViewPagerAdapter.KEY_TITLE, title_arr[i]);
if (i == 0) {
map.put(ViewPagerAdapter.KEY_FRAGMENT, AdvisoryPagerFragment.newInstance());
} else if (i == 1) {
map.put(ViewPagerAdapter.KEY_FRAGMENT, TopAdvisoryPagerFragment.newInstance());
} else if (i == 2) {
map.put(ViewPagerAdapter.KEY_FRAGMENT, ExperViewPagerFragment.newInstance());
}
mAdapter.addFragmentAndTitle(map);
}
return mAdapter;
}
public static class ViewPagerAdapter extends FragmentStatePagerAdapter {
private static final String KEY_TITLE = "fragment_title";
private static final String KEY_FRAGMENT = "fragment";
boolean abc = false;
private int[] drawables = new int[]{R.drawable.advisory_selector, R.drawable.top_advisors_selector, R.drawable.expertview_selector};
private List<Map<String, Object>> maps = new ArrayList<>();
public ViewPagerAdapter(FragmentManager fm) {
super(fm);
}
public View getCustomeView(Context context, int pos) {
View mView = LayoutInflater.from(context).inflate(R.layout.custom_tab_view, null);
TextView mTextView = (TextView) mView.findViewById(R.id.textView);
mTextView.setTypeface(Typeface.createFromAsset(context.getAssets(), "fonts/ufonts.com_cambria.ttf"));
ImageView mImageView = (ImageView) mView.findViewById(R.id.imageView2);
mImageView.setTag(pos);
/*if(count >0)
{
Toast.makeText(context,"Count Is "+count,Toast.LENGTH_SHORT).show();
mImageView = (ImageView) mImageView.getTag(0);
mImageView.setSelected(false);
}
*/
mImageView.setImageResource(drawables[pos]);
mTextView.setText(getPageTitle(pos));
return mView;
}
public void addFragmentAndTitle(Map<String, Object> map) {
maps.add(map);
}
@Override
public CharSequence getPageTitle(int position) {
return (CharSequence) maps.get(position).get(KEY_TITLE);
}
@Override
public Fragment getItem(int position) {
return (Fragment) maps.get(position).get(KEY_FRAGMENT);
}
@Override
public int getCount() {
return maps.size();
}
}
}
MainTabFragment 的子片段为:
AdvisoryPagerFragment.java
AdvisoryPagerFragment.java
public class AdvisoryPagerFragment extends Fragment {
static String advisory_child_fragments[];
int myID = 0;
Bundle bundle;
TabLayout mTabLayout;
public AdvisoryPagerFragment() {
// Required empty public constructor
}
/**
* Use this factory method to create a new instance of
* this fragment using the provided parameters.
*
* @return A new instance of fragment AdvisoryPagerFragment.
*/
public static AdvisoryPagerFragment newInstance() {
return new AdvisoryPagerFragment();
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View inflate = inflater.inflate(R.layout.fragment_app_pager, container, false);
/*Bundle args = getArguments();
if (args != null && args.containsKey("pos_end"))
myID = args.getInt("pos_end");*/
myID = MainTabFragment.position_child_tab;
mTabLayout = (TabLayout) inflate.findViewById(R.id.fragmentTabLayout);
advisory_child_fragments = new String[]{"EQUITY", "INDICES", "COMMODITY", "CURRENCY"};
ViewPager pager = (ViewPager) inflate.findViewById(R.id.fragment_pager);
FragmentViewPagerAdapter mPagerAdapter = new FragmentViewPagerAdapter(getChildFragmentManager());
pager.setAdapter(mPagerAdapter);
mTabLayout.setupWithViewPager(pager);
for (int i = 0; i < mPagerAdapter.getCount(); i++) {
View customView = mPagerAdapter.getCustomeView(getActivity(), i);
mTabLayout.getTabAt(i).setCustomView(customView);
}
pager.setCurrentItem(myID);
return inflate;
}
@Override
public void onViewCreated(View view, Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
mTabLayout.getTabAt(myID).getCustomView().setSelected(true);
}
public static class FragmentViewPagerAdapter extends FragmentStatePagerAdapter {
public FragmentViewPagerAdapter(FragmentManager fm) {
super(fm);
}
public View getCustomeView(Context context, int pos) {
View mView = LayoutInflater.from(context).inflate(R.layout.custom_view, null);
TextView mTextView = (TextView) mView.findViewById(R.id.belowTab_textview);
mTextView.setTypeface(Typeface.createFromAsset(context.getAssets(), "fonts/ufonts.com_cambria.ttf"));
mTextView.setText(getPageTitle(pos));
return mView;
}
//
@Override
public CharSequence getPageTitle(int position) {
return advisory_child_fragments[position];
}
@Override
public Fragment getItem(int position) {
switch (position) {
case 0:
return new EquityFragment();
case 1:
return new IndicesFragment();
case 2:
return new CommodityFragment();
case 3:
return new CurrencyFragment();
}
return null;
}
@Override
public int getCount() {
return 4;
}
}
}
而上述AdvisoryPagerFragment的子片段是
EquityFragment.java
EquityFragment.java
public class EquityFragment extends android.support.v4.app.Fragment implements SearchView.OnQueryTextListener {
public static String imagepath = null;
static ArrayList<EquityDetails> catListDao = new ArrayList<EquityDetails>();
static ArrayList<EquityDetails> catListDao1 = new ArrayList<EquityDetails>();
static int count = 0;
static int count1 = 0;
ListView list;
View view;
Activity act;
AdvisorsAdapter adapter;
TextView empty_text;
private boolean isViewShown = false;
ProgressBar progressBar;
public static EquityFragment newInstance() {
return new EquityFragment();
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
view = inflater.inflate(R.layout.equity_activity, container, false);
act = this.getActivity();
Log.d("Callled ", "" + count);
count++;
return view;
}
public void onActivityCreated(Bundle savedInstanceState1) {
super.onActivityCreated(savedInstanceState1);
if (android.os.Build.VERSION.SDK_INT > 9) {
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);
}
list = (ListView) view.findViewById(R.id.list_equity);
setHasOptionsMenu(true);
empty_text = (TextView) view.findViewById(R.id.empty);
progressBar = (ProgressBar) view.findViewById(R.id.progressBar);
if (Utils.isNetworkAvailable(getActivity())) {
if (catListDao.size() > 0) {
adapter = new AdvisorsAdapter(act, R.layout.custom_equity, catListDao, 5);
list.setAdapter(adapter);
} else {
new Thread(new Runnable() {
@Override
public void run() {
// do some work here
getActivity().runOnUiThread(new Runnable() {
@Override
public void run() {
// if (!isViewShown) {
new FetchAllData(getActivity(), 5).executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
// }
}
});
}
}).start();
}
} else {
CustomToast toast = new CustomToast(getActivity(), "There is no internet connection!");
}
}
FetchdataClass 从服务中获取数据并添加到 ListView
FetchdataClass which fetches the data from service and add into ListView
public class FetchAllData extends AsyncTask<Void, Void, String> {
ProgressDialog pDialog;
int typeId;
private Context cont;
public FetchAllData(Context con, int typeId) {
// TODO Auto-generated constructor stub
this.cont = con;
this.typeId = typeId;
Log.d("Constructor Called", "yes");
}
@Override
protected void onPreExecute() {
// TODO Auto-generated method stub
super.onPreExecute();
progressBar.setVisibility(View.VISIBLE);
}
@Override
protected String doInBackground(Void... params) {
// TODO Auto-generated method stub
return getString();
}
private String getString() {
// TODO Auto-generated method stub
URL obj = null;
HttpURLConnection con = null;
try {
obj = new URL(Constants.AppBaseUrl + "/call_listing/" + typeId);
String userPassword = "oi" + ":" + "kl";
String header = "Basic " + new String(android.util.Base64.encode(userPassword.getBytes(), android.util.Base64.NO_WRAP));
con = (HttpURLConnection) obj.openConnection();
con.addRequestProperty("Authorization", header);
con.setRequestProperty("Content-type", "application/x-www-form-urlencoded");
con.setRequestMethod("POST");
// For POST only - BEGIN
con.setDoOutput(true);
OutputStream os = con.getOutputStream();
os.flush();
os.close();
// For POST only - END
int responseCode = con.getResponseCode();
if (responseCode == HttpURLConnection.HTTP_OK) { //success
BufferedReader in = new BufferedReader(new InputStreamReader(con.getInputStream()));
String inputLine;
StringBuffer response = new StringBuffer();
while ((inputLine = in.readLine()) != null) {
response.append(inputLine);
}
in.close();
Log.i("TAG", response.toString());
return response.toString();
} else {
Log.i("TAG", "POST request did not work.");
}
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(String result) {
// TODO Auto-generated method stub
super.onPostExecute(result);
if (result != null) {
// pDialog.dismiss();
progressBar.setVisibility(View.GONE);
JSONObject jsonObject;
try {
catListDao = new ArrayList<EquityDetails>();
jsonObject = new JSONObject(result);
JSONArray jsonArray = jsonObject.getJSONArray("list");
Log.d("Length ", "" + jsonArray.length());
for (int i = 0; i < jsonArray.length(); i++) {
EquityDetails allDirectory = new EquityDetails();
allDirectory.setEntry_value(jsonArray.getJSONObject(i).getString("entry"));
allDirectory.setSerial_value(jsonArray.getJSONObject(i).getString("sl"));
allDirectory.setTg_value1(jsonArray.getJSONObject(i).getString("tgt_1"));
allDirectory.setTg_value2(jsonArray.getJSONObject(i).getString("tgt_2"));
allDirectory.setMainTitle_value(jsonArray.getJSONObject(i).getString("script"));
allDirectory.setMain_subTitle_value(jsonArray.getJSONObject(i).getString("exchange"));
allDirectory.setRating_value(jsonArray.getJSONObject(i).getString("rating"));
allDirectory.setReview_value(jsonArray.getJSONObject(i).getString("review"));
allDirectory.setImage1(jsonArray.getJSONObject(i).getString("advisor_image"));
allDirectory.setPosted_by(jsonArray.getJSONObject(i).getString("posted_by"));
allDirectory.setImage2(jsonArray.getJSONObject(i).getString("script_image"));
allDirectory.setCall_id(jsonArray.getJSONObject(i).getString("call_id"));
allDirectory.setBuy(jsonArray.getJSONObject(i).getString("buy_sentiment"));
allDirectory.setSell(jsonArray.getJSONObject(i).getString("sell_sentiment"));
allDirectory.setRecommend(jsonArray.getJSONObject(i).getString("recommendation"));
allDirectory.setPosted_date(jsonArray.getJSONObject(i).getString("posted_date"));
allDirectory.setExpiry_date(jsonArray.getJSONObject(i).getString("expiry_date"));
catListDao.add(allDirectory);
}
catListDao1 = catListDao;
ab = true;
adapter = new AdvisorsAdapter(act, R.layout.custom_equity, catListDao, 0);
list.setAdapter(adapter);
} catch (JSONException e) {
e.printStackTrace();
}
}
//pDialog.dismiss();
progressBar.setVisibility(View.GONE);
}
}
推荐答案
尝试设置
pager.setOffscreenPageLimit(no_of_fragments or pages);
在创建片段时在 asyctask 中完成所有任务
Do all your task in asyctask on creation of fragments
这篇关于已解决 - Android ViewPager 和 TabLayout 运行不快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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