在我的片段类中，片段活动在活动进入后台时崩溃，并且在前台应用程序中返回时会崩溃。
这是我的班级： -
public class HomeFragment extends Fragment implements View.OnClickListener {
public static final String KEY_IS_POPPED = "KEY_IS_POPPED";
public boolean mPopped;
/* Slider Varible */
private SliderLayout mDemoSlider;
private HashMap<String,String> url_maps = new HashMap<>();
private List<String> image_path = new ArrayList<>();
/* Category Grid */
private HomeFragmentAdapter adaptergridview;
private ArrayList<Cateogary> productsList = new ArrayList<>();
private ImageView category1,category2,category3,category4,category5,category6;
/* Banners */
private LinearLayout linearLayoutline3;
private List<Banners> bannersList = new ArrayList<>();
/* Footer */
private TextView cart_botem_home,cart_botem_cart,cart_bottem_search,buy_now_wishlist_bottem;
private UserSessionManager session;
public HomeFragment() {
// Required empty public constructor
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
@Override
public View onCreateView(final LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_home, container, false);
mDemoSlider = (SliderLayout)rootView.findViewById(R.id.slider);
adaptergridview = new HomeFragmentAdapter(getContext(),R.layout.home_fragment_grid,productsList);
linearLayoutline3 = (LinearLayout)rootView.findViewById(R.id.line3);
category1 = (ImageView)rootView.findViewById(R.id.category1);
category2 = (ImageView)rootView.findViewById(R.id.category2);
category3 = (ImageView)rootView.findViewById(R.id.category3);
category4 = (ImageView)rootView.findViewById(R.id.category4);
category5 = (ImageView)rootView.findViewById(R.id.category5);
category6 = (ImageView)rootView.findViewById(R.id.category6);
cart_botem_home = (TextView)rootView.findViewById(R.id.cart_botem_home);
cart_botem_cart = (TextView)rootView.findViewById(R.id.cart_botem_cart);
cart_bottem_search = (TextView)rootView.findViewById(R.id.cart_bottem_search);
buy_now_wishlist_bottem = (TextView)rootView.findViewById(R.id.buy_now_wishlist_bottem);
cart_botem_home.setOnClickListener(this);
cart_botem_cart.setOnClickListener(this);
cart_bottem_search.setOnClickListener(this);
buy_now_wishlist_bottem.setOnClickListener(this);
session = new UserSessionManager(getContext());
category1.setOnClickListener(this);
category2.setOnClickListener(this);
category3.setOnClickListener(this);
category4.setOnClickListener(this);
category5.setOnClickListener(this);
category6.setOnClickListener(this);
new ImageSlider().execute("http://www.shoppingmazza.com/?route=feed/web_api/slider&key=test123$");
new Printcategory().execute("http://www.shoppingmazza.com/?route=feed/web_api/fmenu&key=test123$");
new PrintBanners().execute("http://shoppingmazza.com/?route=feed/web_api/homeapp&key=test123$");
return rootView;
}
public void onClick(View v){
switch (v.getId()){
case R.id.category1:
Intent intent = new Intent(getContext(),SubCategory.class);
intent.putExtra("menu_id", productsList.get(0).getCid());
startActivity(intent);
break;
case R.id.category2:
Intent intent1 = new Intent(getContext(),SubCategory.class);
intent1.putExtra("menu_id",productsList.get(1).getCid());
startActivity(intent1);
break;
case R.id.category3:
Intent intent2 = new Intent(getContext(),SubCategory.class);
intent2.putExtra("menu_id",productsList.get(2).getCid());
startActivity(intent2);
break;
case R.id.category4:
Intent intent3 = new Intent(getContext(),SubCategory.class);
intent3.putExtra("menu_id",productsList.get(3).getCid());
startActivity(intent3);
break;
case R.id.category5:
Intent intent4 = new Intent(getContext(),SubCategory.class);
intent4.putExtra("menu_id",productsList.get(4).getCid());
startActivity(intent4);
break;
case R.id.category6:
Intent intent5 = new Intent(getContext(),SubCategory.class);
intent5.putExtra("menu_id",productsList.get(5).getCid());
startActivity(intent5);
break;
case R.id.cart_botem_home:
Intent intent6 = new Intent(getContext(),MainActivity.class);
startActivity(intent6);
break;
case R.id.cart_botem_cart:
Intent intent7 = new Intent(getContext(),CheckOut.class);
startActivity(intent7);
break;
case R.id.cart_bottem_search:
Intent intent8 = new Intent(getContext(),SearchActivity.class);
startActivity(intent8);
break;
case R.id.buy_now_wishlist_bottem:
if(session.checkLoginWishlist()){
Intent wishlistIntent = new Intent(getContext(),WishList.class);
startActivity(wishlistIntent);
}
else {
Toast.makeText(getContext(),"Login first to see wishlist",Toast.LENGTH_LONG).show();
}
break;
}
}
public class ImageSlider extends AsyncTask<String ,Void,Void>{
Boolean result = true;
@Override
protected void onPreExecute() {
super.onPreExecute();
}
@Override
protected Void doInBackground(String... params) {
try {
HttpClient client = new DefaultHttpClient();
HttpPost post = new HttpPost(params[0]);
HttpResponse response = client.execute(post);
int sattus = response.getStatusLine().getStatusCode();
if(sattus==200){
HttpEntity entity = response.getEntity();
String data = EntityUtils.toString(entity);
JSONObject jsonObject = new JSONObject(data);
JSONArray jsonArray = jsonObject.getJSONArray("banners");
for(int i=0;i<jsonArray.length();i++){
JSONObject jsonObject1 = jsonArray.getJSONObject(i);
image_path.add(jsonObject1.getString("sliderimage"));
}
}
}catch (IOException |JSONException e){
result = false;
Log.e("Error ",e.getMessage());
}
return null;
}
@Override
protected void onPostExecute(Void aVoid) {
//super.onPostExecute(aVoid);
if(result){
for(int i=0;i<image_path.size();i++){
url_maps.put(i+"", image_path.get(i));
}
for(String name : url_maps.keySet()){
TextSliderView textSliderView = new TextSliderView(getContext());
textSliderView
.description("")
.image(url_maps.get(name));
mDemoSlider.addSlider(textSliderView);
}
//LinearLayout.LayoutParams layoutParams =
Display display = getActivity().getWindowManager().getDefaultDisplay();
Point size = new Point();
display.getSize(size);
int width = size.x;
int height = size.y;
mDemoSlider.getLayoutParams().height=(height*30)/100;
mDemoSlider.requestLayout();
//mDemoSlider.
/* LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.FILL_PARENT, heigth1);
mDemoSlider.setLayoutParams(layoutParams);
mDemoSlider.requestLayout();*/
mDemoSlider.setPresetTransformer(SliderLayout.Transformer.Accordion);
mDemoSlider.setCustomAnimation(new DescriptionAnimation());
mDemoSlider.setDuration(4000);
}
else {
Toast.makeText(getContext(),"Somthing is bad happen",Toast.LENGTH_LONG).show();
}
}
}
public class Printcategory extends AsyncTask<String,Void,Boolean>{
ProgressDialog dialog;
@Override
protected void onPreExecute() {
super.onPreExecute();
dialog = new ProgressDialog(getContext());
dialog.setCancelable(false);
dialog.show();
}
@Override
protected Boolean doInBackground(String... params) {
try{
HttpClient client = new DefaultHttpClient();
HttpPost post = new HttpPost(params[0]);
HttpResponse response = client.execute(post);
int status = response.getStatusLine().getStatusCode();
if(status==200){
HttpEntity entity = response.getEntity();
String data = EntityUtils.toString(entity);
JSONObject jsonObject = new JSONObject(data);
JSONArray jsonArray = jsonObject.getJSONArray("categories");
for(int i=0;i<jsonArray.length();i++){
JSONObject jsonObject1 = jsonArray.getJSONObject(i);
Cateogary product = new Cateogary();
product.setName(jsonObject1.getString("name"));
product.setCid(jsonObject1.getString("cid"));
product.setImageview(jsonObject1.getString("image"));
productsList.add(product);
}
return true;
}
}catch (IOException | JSONException e){
Log.e("Error:",e.getMessage());
}
return null;
}
@Override
protected void onPostExecute(Boolean aVoid) {
//super.onPostExecute(aVoid);
dialog.dismiss();
adaptergridview.notifyDataSetChanged();
if(!aVoid){
Toast.makeText(getContext(), "Data is not Parsed", Toast.LENGTH_LONG).show();
}
else {
Log.d("pod",productsList.size()+"");
Log.d("array",productsList+"");
int cnt =0;
// for(int i=0;i<productsList.size();i++){
Display display = getActivity().getWindowManager().getDefaultDisplay();
Point size = new Point();
display.getSize(size);
int width = size.x;
int height = size.y;
Picasso.with(getContext()).load(productsList.get(0).getImageview()).resize(width/2,(height*40)/100).into(category1);
Picasso.with(getContext()).load(productsList.get(1).getImageview()).resize(width/2,(height*40)/100).into(category2);
Picasso.with(getContext()).load(productsList.get(2).getImageview()).resize(width/2,(height*40)/100).into(category3);
Picasso.with(getContext()).load(productsList.get(3).getImageview()).resize(width/2,(height*40)/100).into(category4);
Picasso.with(getContext()).load(productsList.get(4).getImageview()).resize(width/2,(height*40)/100).into(category5);
Picasso.with(getContext()).load(productsList.get(5).getImageview()).resize(width/2,(height*40)/100).into(category6);
/* LinearLayout linearLayout = new LinearLayout(getContext());
linearLayout.setOrientation(LinearLayout.HORIZONTAL);
for(int j=2*i;j<=(2*i)+1;j++){
Display display = getActivity().getWindowManager().getDefaultDisplay();
Point size = new Point();
display.getSize(size);
int width = size.x;
int height = size.y;
LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT);
layoutParams.weight = 0.5f;
final ImageView imageView = new ImageView(getContext());
imageView.setLayoutParams(layoutParams);
imageView.setId(i);
imageView.setPadding(10, 10, 10, 10);
Picasso.with(getContext()).load(productsList.get(j).getImageview()).resize(width/2,300).into(imageView);
linearLayout.addView(imageView);
imageView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(getContext(),SubCategory.class);
intent.putExtra("menu_id",productsList.get(v.getId()).getCid());
startActivity(intent);
}
});
}*/
//linearLayoutline3.addView(linearLayout);
// }
}
}
}
public class PrintBanners extends AsyncTask<String,Void,Void>{
Boolean result =true;
ProgressDialog dialog;
@Override
protected void onPreExecute() {
super.onPreExecute();
dialog = new ProgressDialog(getContext());
dialog.setCancelable(false);
dialog.show();
}
@Override
protected Void doInBackground(String... params) {
try {
HttpClient client = new DefaultHttpClient();
HttpPost post = new HttpPost(params[0]);
HttpResponse response = client.execute(post);
int status = response.getStatusLine().getStatusCode();
if(status==200){
HttpEntity entity = response.getEntity();
String data = EntityUtils.toString(entity);
JSONObject jsonObject = new JSONObject(data);
JSONArray jsonArray = jsonObject.getJSONArray("homebanner");
for(int i=0;i<jsonArray.length();i++){
JSONObject jsonObject1 = jsonArray.getJSONObject(i);
Banners banners = new Banners();
banners.setName(jsonObject1.getString("name"));
banners.setCid(jsonObject1.getString("cid"));
banners.setImage(jsonObject1.getString("image"));
bannersList.add(banners);
}
}
}
catch (IOException | JSONException e){
result = false;
}
return null;
}
@Override
protected void onPostExecute(Void aVoid) {
//super.onPostExecute(aVoid);
dialog.dismiss();
if(result){
for(int i=0;i<bannersList.size();i++){
final ImageView imageView = new ImageView(getContext());
imageView.setId(i);
Display display = getActivity().getWindowManager().getDefaultDisplay();
Point size = new Point();
display.getSize(size);
int width = size.x;
int height = size.y;
Picasso.with(getContext()).load(bannersList.get(i).getImage()).resize(width,(height*30)/100).centerInside().into(imageView);
// Picasso.with(getContext()).load("http://shoppingmazza.com/image/data/app/5.jpg").into(imageView);
imageView.setPadding(20, 0, 20, 0);
// imageView.setPadding();
TextView textView = new TextView(getContext());
textView.setText(bannersList.get(i).getName());
textView.setPadding(20, 0, 0, 0);
textView.setTextSize(24.0f);
textView.setTextColor(Color.parseColor("#5c5c5c"));
linearLayoutline3.addView(textView);
linearLayoutline3.addView(imageView);
imageView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(getContext(),ProductsCategory.class);
intent.putExtra("category",bannersList.get(v.getId()).getCid());
startActivity(intent);
}
});
}
}
else {
Toast.makeText(getContext(),"Somthing is bad happen try again later",Toast.LENGTH_LONG).show();
}
}
}
@Override
public void onAttach(Activity activity) {
super.onAttach(activity);
}
@Override
public void onDetach() {
super.onDetach();
}
public class MalibuCountDownTimer extends CountDownTimer {
public MalibuCountDownTimer(long millisInFuture, long countDownInterval) {
super(millisInFuture, countDownInterval);
}
@Override
public void onTick(long millisUntilFinished) {
Toast.makeText(getContext(), "hello look time is running", Toast.LENGTH_LONG).show();
}
@Override
public void onFinish() {
}
}
}
logcat的： -
12-01 18:33:52.040 1428-1480/system_process E/KernelUidCpuTimeReader: Failed to read uid_cputime
java.io.FileNotFoundException: /proc/uid_cputime/show_uid_stat: open failed: ENOENT (No such file or directory)
at libcore.io.IoBridge.open(IoBridge.java:452)
at java.io.FileInputStream.<init>(FileInputStream.java:76)
at java.io.FileInputStream.<init>(FileInputStream.java:103)
at java.io.FileReader.<init>(FileReader.java:66)
at com.android.internal.os.KernelUidCpuTimeReader.readDelta(KernelUidCpuTimeReader.java:71)
at com.android.internal.os.BatteryStatsImpl.updateCpuTimeLocked(BatteryStatsImpl.java:8031)
at com.android.server.am.BatteryStatsService.updateExternalStats(BatteryStatsService.java:1366)
at com.android.server.am.BatteryStatsService$BatteryStatsHandler.handleMessage(BatteryStatsService.java:125)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.os.HandlerThread.run(HandlerThread.java:61)
at com.android.server.ServiceThread.run(ServiceThread.java:46)
Caused by: android.system.ErrnoException: open failed: ENOENT (No such file or directory)
at libcore.io.Posix.open(Native Method)
at libcore.io.BlockGuardOs.open(BlockGuardOs.java:186)
at libcore.io.IoBridge.open(IoBridge.java:438)
at java.io.FileInputStream.<init>(FileInputStream.java:76)
at java.io.FileInputStream.<init>(FileInputStream.java:103)
at java.io.FileReader.<init>(FileReader.java:66)
at com.android.internal.os.KernelUidCpuTimeReader.readDelta(KernelUidCpuTimeReader.java:71)
at com.android.internal.os.BatteryStatsImpl.updateCpuTimeLocked(BatteryStatsImpl.java:8031)
at com.android.server.am.BatteryStatsService.updateExternalStats(BatteryStatsService.java:1366)
at com.android.server.am.BatteryStatsService$BatteryStatsHandler.handleMessage(BatteryStatsService.java:125)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.os.HandlerThread.run(HandlerThread.java:61)
at com.android.server.ServiceThread.run(ServiceThread.java:46)
我是android开发的新手。任何人都可以帮我解决我的问题。提前谢谢！