我的应用程序工作正常，但是当它在后台运行时，然后在恢复后停止在logcat处理这些错误：
09-26 15:46:49.278: D/SqliteDatabaseCpp(5847): Registering sqlite logging func: /data/data/com.friends.roleon/databases/roleonDB
09-26 15:46:49.288: D/SqliteDatabaseCpp(5847): DB info: open db, path = /data/data/com.friends.roleon/databases , key = DvkadTace, flag = 6, file size = 34816
09-26 15:46:49.288: D/SqliteDatabaseCpp(5847): DB info: path = /data/data/com.friends.roleon/databases , key = DvkadTace, handle: 0x1f29030, type: w, r/w: (0,1), mode: truncate, disk free size: 213 M
09-26 15:46:49.318: D/SqliteDatabaseCpp(5847): DB info: close db, path = /data/data/com.friends.roleon/databases , key = DvkadTace, handle = 0x1f29030, type = w, r/w = (0, 0)
09-26 15:46:49.318: D/check(5847): create fragmentnull
09-26 15:46:49.559: D/SqliteDatabaseCpp(5847): DB info: open db, path = /data/data/com.friends.roleon/databases , key = DvkadTace, flag = 6, file size = 34816
09-26 15:46:49.599: D/SqliteDatabaseCpp(5847): DB info: path = /data/data/com.friends.roleon/databases , key = DvkadTace, handle: 0x1f4a208, type: w, r/w: (0,1), mode: truncate, disk free size: 213 M
09-26 15:46:49.649: D/SqliteDatabaseCpp(5847): DB info: open db, path = /data/data/com.friends.roleon/databases , key = DvkadTace, flag = 6, file size = 34816
09-26 15:46:49.649: D/AndroidRuntime(5847): Shutting down VM
09-26 15:46:49.649: W/dalvikvm(5847): threadid=1: thread exiting with uncaught exception (group=0x40aab228)
09-26 15:46:49.659: E/AndroidRuntime(5847): FATAL EXCEPTION: main
09-26 15:46:49.659: E/AndroidRuntime(5847): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.friends.roleon/com.friends.roleon.roleonMain}: java.lang.IllegalArgumentException: No view found for id 0x7f060038 for fragment RecordListFragment{40dd3b10 #2 id=0x7f060038}
09-26 15:46:49.659: E/AndroidRuntime(5847): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2205)
09-26 15:46:49.659: E/AndroidRuntime(5847): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2240)
09-26 15:46:49.659: E/AndroidRuntime(5847): at android.app.ActivityThread.access$600(ActivityThread.java:139)
09-26 15:46:49.659: E/AndroidRuntime(5847): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1262)
09-26 15:46:49.659: E/AndroidRuntime(5847): at android.os.Handler.dispatchMessage(Handler.java:99)
09-26 15:46:49.659: E/AndroidRuntime(5847): at android.os.Looper.loop(Looper.java:156)
09-26 15:46:49.659: E/AndroidRuntime(5847): at android.app.ActivityThread.main(ActivityThread.java:4987)
09-26 15:46:49.659: E/AndroidRuntime(5847): at java.lang.reflect.Method.invokeNative(Native Method)
09-26 15:46:49.659: E/AndroidRuntime(5847): at java.lang.reflect.Method.invoke(Method.java:511)
09-26 15:46:49.659: E/AndroidRuntime(5847): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
09-26 15:46:49.659: E/AndroidRuntime(5847): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
09-26 15:46:49.659: E/AndroidRuntime(5847): at dalvik.system.NativeStart.main(Native Method)
09-26 15:46:49.659: E/AndroidRuntime(5847): Caused by: java.lang.IllegalArgumentException: No view found for id 0x7f060038 for fragment RecordListFragment{40dd3b10 #2 id=0x7f060038}
09-26 15:46:49.659: E/AndroidRuntime(5847): at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:864)
09-26 15:46:49.659: E/AndroidRuntime(5847): at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1080)
09-26 15:46:49.659: E/AndroidRuntime(5847): at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:622)
09-26 15:46:49.659: E/AndroidRuntime(5847): at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1416)
09-26 15:46:49.659: E/AndroidRuntime(5847): at android.support.v4.app.FragmentActivity.onStart(FragmentActivity.java:505)
09-26 15:46:49.659: E/AndroidRuntime(5847): at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1195)
09-26 15:46:49.659: E/AndroidRuntime(5847): at android.app.Activity.performStart(Activity.java:4548)
09-26 15:46:49.659: E/AndroidRuntime(5847): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2178)
09-26 15:46:49.659: E/AndroidRuntime(5847): ... 11 more
09-26 15:46:49.679: D/SqliteDatabaseCpp(5847): DB info: path = /data/data/com.friends.roleon/databases , key = DvkadTace, handle: 0x1f5d218, type: w, r/w: (0,2), mode: truncate, disk free size: 213 M
09-26 15:46:49.829: W/System.err(5847): java.lang.NullPointerException
09-26 15:46:49.829: W/System.err(5847): at com.friends.roleon.utility.DataBase.<init>(DataBase.java:27)
09-26 15:46:49.839: W/System.err(5847): at com.friends.roleon.list.ListViewGenerator.RecordViewGenerator(ListViewGenerator.java:25)
09-26 15:46:49.839: W/System.err(5847): at com.friends.roleon.list.record.RecordList$RecordListFragment$BackgroundTask.doInBackground(RecordList.java:97)
09-26 15:46:49.839: W/System.err(5847): at com.friends.roleon.list.record.RecordList$RecordListFragment$BackgroundTask.doInBackground(RecordList.java:1)
09-26 15:46:49.849: W/System.err(5847): at android.os.AsyncTask$2.call(AsyncTask.java:264)
09-26 15:46:49.849: W/System.err(5847): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
09-26 15:46:49.849: W/System.err(5847): at java.util.concurrent.FutureTask.run(FutureTask.java:137)
09-26 15:46:49.849: W/System.err(5847): at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:208)
09-26 15:46:49.859: W/System.err(5847): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)
09-26 15:46:49.859: W/System.err(5847): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
09-26 15:46:49.859: W/System.err(5847): at java.lang.Thread.run(Thread.java:864)
09-26 15:46:49.869: D/error(5847): this is the exception :java.lang.NullPointerException
09-26 15:46:49.879: W/DBVersion(5847): 3
09-26 15:46:49.879: D/SqliteDatabaseCpp(5847): DB info: open db, path = /data/data/com.friends.roleon/databases , key = DvkadTace, flag = 6, file size = 34816
09-26 15:46:49.879: W/dalvikvm(5847): threadid=11: thread exiting with uncaught exception (group=0x40aab228)
09-26 15:46:49.879: D/SqliteDatabaseCpp(5847): DB info: path = /data/data/com.friends.roleon/databases , key = DvkadTace, handle: 0x1f77c90, type: w, r/w: (0,3), mode: truncate, disk free size: 213 M
09-26 15:46:49.889: E/AndroidRuntime_2_crash(5847): crash in the same process: AsyncTask #1
09-26 15:46:49.889: E/AndroidRuntime_2_crash(5847): java.lang.RuntimeException: An error occured while executing doInBackground()
09-26 15:46:49.889: E/AndroidRuntime_2_crash(5847): at android.os.AsyncTask$3.done(AsyncTask.java:278)
09-26 15:46:49.889: E/AndroidRuntime_2_crash(5847): at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:273)
09-26 15:46:49.889: E/AndroidRuntime_2_crash(5847): at java.util.concurrent.FutureTask.setException(FutureTask.java:124)
09-26 15:46:49.889: E/AndroidRuntime_2_crash(5847): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:307)
09-26 15:46:49.889: E/AndroidRuntime_2_crash(5847): at java.util.concurrent.FutureTask.run(FutureTask.java:137)
09-26 15:46:49.889: E/AndroidRuntime_2_crash(5847): at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:208)
09-26 15:46:49.889: E/AndroidRuntime_2_crash(5847): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)
09-26 15:46:49.889: E/AndroidRuntime_2_crash(5847): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
09-26 15:46:49.889: E/AndroidRuntime_2_crash(5847): at java.lang.Thread.run(Thread.java:864)
09-26 15:46:49.889: E/AndroidRuntime_2_crash(5847): Caused by: java.lang.NullPointerException
09-26 15:46:49.889: E/AndroidRuntime_2_crash(5847): at com.friends.roleon.list.record.RecordList$RecordListFragment$BackgroundTask.doInBackground(RecordList.java:132)
09-26 15:46:49.889: E/AndroidRuntime_2_crash(5847): at com.friends.roleon.list.record.RecordList$RecordListFragment$BackgroundTask.doInBackground(RecordList.java:1)
09-26 15:46:49.889: E/AndroidRuntime_2_crash(5847): at android.os.AsyncTask$2.call(AsyncTask.java:264)
09-26 15:46:49.889: E/AndroidRuntime_2_crash(5847): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
09-26 15:46:49.889: E/AndroidRuntime_2_crash(5847): ... 5 more
09-26 15:46:49.909: D/SqliteDatabaseCpp(5847): DB info: close db, path = /data/data/com.friends.roleon/databases , key = DvkadTace, handle = 0x1f77c90, type = w, r/w = (0, 2)
这是我的主要课程：
public class roleon extends SherlockFragmentActivity implements
ActionBar.TabListener {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
getSupportActionBar().setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
getSupportActionBar().setDisplayShowHomeEnabled(false);
getSupportActionBar().setDisplayShowTitleEnabled(false);
AddTab(getString(R.string.tab_home));
AddTab(getString(R.string.tab_activities));
AddTab(getString(R.string.tab_settings));
}
private void AddTab(String tabName) {
ActionBar.Tab tab = getSupportActionBar().newTab();
tab.setText(tabName);
tab.setTabListener(this);
getSupportActionBar().addTab(tab);
}
@Override
public void onTabSelected(Tab tab, FragmentTransaction ft) {
Fragment fragment = null;
if (tab.getText().equals(getText(R.string.tab_home))) {
fragment = new ModuleList.ModuleListFragment();
} else if (tab.getText().equals(getText(R.string.tab_activities))) {
fragment = new ActivityStatePager.FragmentDisplay();
} else if (tab.getText().equals(getText(R.string.tab_settings))) {
fragment = new PreferenceScreen.PreferenceScreenFragment();
}
getSupportFragmentManager().beginTransaction()
.replace(R.id.fragment_container, fragment).commit();
}
@Override
public void onTabUnselected(Tab tab, FragmentTransaction ft) {
// Do nothing
}
@Override
public void onTabReselected(Tab tab, FragmentTransaction ft) {
}
}
这是应用程序在恢复时崩溃的片段类：
public class ActivityStatePager extends SherlockFragmentActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
setTheme(R.style.Theme_Sherlock_NoActionBar);
super.onCreate(savedInstanceState);
if (savedInstanceState == null) {
FragmentDisplay fragment = new FragmentDisplay();
getSupportFragmentManager().beginTransaction()
.add(android.R.id.content, fragment).commit();
}
}
@Override
protected void onPause() {
super.onPause();
ActivityStatePager.this.finish();
}
@Override
protected void onResume() {
super.onResume();
startActivity(new Intent(ActivityStatePager.this,
roleon.class));
}
@Override
protected void onDestroy() {
super.onDestroy();
ActivityStatePager.this.finish();
}
public static class FragmentDisplay extends SherlockFragment {
// Static Declarations
static final int NUM_ITEMS = 3;
private View mLayout;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View v = inflater
.inflate(R.layout.fragment_pager, container, false);
mLayout = v.findViewById(R.id.container);
SetSpinner(v);
return v;
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
}
private void SetSpinner(View v) {
Spinner eventspinner = (Spinner) v.findViewById(R.id.eventspinner);
ArrayAdapter<CharSequence> adapter = new ArrayAdapter<CharSequence>(
getActivity(), android.R.layout.simple_spinner_item);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
DataBase db = new DataBase(getActivity(), "EventStatus");
ArrayList<Record> eventsArray = db.SelectStatusList();
db.close();
for (Iterator<Record> iterator = eventsArray.iterator(); iterator
.hasNext();) {
Record record = (Record) iterator.next();
adapter.add(record.getEventStatus());
}
eventspinner.setAdapter(adapter);
eventspinner
.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
public void onItemSelected(AdapterView<?> parent,
View view, int pos, long id) {
CreateFragment(parent.getItemAtPosition(pos)
.toString());
}
public void onNothingSelected(AdapterView<?> parent) {
// do nothing
}
});
}
public void CreateFragment(String fragLabel) {
FragmentTransaction ft = getSherlockActivity()
.getSupportFragmentManager().beginTransaction();
Fragment fragment = new ActivityListFragment(fragLabel);//fragLabel
ft.add(((LinearLayout) mLayout).getId(), fragment).commit();
}
@Override
public void onDestroyView() {
super.onDestroyView();
}
public static class ActivityListFragment extends SherlockFragment {
private String mFragTag;
private View mFrameLayout;
private View mView;
public ActivityListFragment(String fragName) {
mFragTag = fragName;
}
public ActivityListFragment(){
// empty constructor
}
@Override
public View onCreateView(LayoutInflater inflater,
ViewGroup container, Bundle savedInstanceState) {
mView = inflater.inflate(R.layout.fragment_pager_list,
container, false);
mFrameLayout = mView.findViewById(R.id.frame_layout);
return mView;
}
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
SetFragment();
};
public void SetFragment() {
FragmentTransaction ft = getSherlockActivity()
.getSupportFragmentManager().beginTransaction();
Fragment fragment = new RecordList.RecordListFragment();
Bundle extras = new Bundle();
extras.putString("eventstatus", mFragTag);
fragment.setArguments(extras);
ft.replace(((FrameLayout) mFrameLayout).getId(), fragment)
.commit();
}
@Override
public void onDestroyView() {
super.onDestroyView();
}
}
}
}
R.id.frame_layout在R.java文件中具有id：0x7f060038
这是我的RecordList.RecordListFragment（）所做的：
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
v = inflater.inflate(R.layout.record_list, container, false);
mSP = PreferenceManager.getDefaultSharedPreferences(getActivity());
GetIntent();
getActivity().setTitle(label);
new BackgroundTask().execute();
return v;
}
private class BackgroundTask extends AsyncTask<Void, Void, Void> {
ProgressDialog mDialog;
protected void onPreExecute() {
mDialog = ProgressDialog.show(getActivity(), "",
getString(R.string.progress_bar_loading), true);
};
@Override
protected Void doInBackground(Void... params) {
try {
mModule = new CRMModule(name, getActivity(),
getActivity().getIntent());
mEnableOptions = true;
rarray = ListViewGenerator.RecordViewGenerator(mSP,
getActivity(), name);
Log.d("values","in doinbackground"+mModule+","+rarray);
getActivity().runOnUiThread(new Runnable() {
@Override
public void run() {
// Amazing List View
View composer = v.findViewById(R.id.lsComposer);
mLsComposer = ((DynamicListView) composer);
try {
mLsComposer
.setAdapter(mAdapter = new PaginationComposerAdapter(
mSP, getActivity(),
rarray, name,
label, mEventStatus));
Options(men);
} catch (Exception e) {
Log.d("exception", "this is here at composer"+e);
e.printStackTrace();
}
if (mAdapter.getCount() > 10) {
mLsComposer
.setLoadingView(getActivity()
.getLayoutInflater()
.inflate(
R.layout.lscomposer_loadingview,
null));
}
Log.d("complete","at the end");
}
});
} catch (final Exception e) {
Log.d("error", "this is the exception :"+e);
getActivity().runOnUiThread(new Runnable() {
@Override
public void run() {
mEnableOptions = false;
// getActivity().supportInvalidateOptionsMenu();
MethodActivity.CheckLogin(mSP, getActivity()
.getIntent(), getActivity(), e);
}
});
}
return null;
}
protected void onPostExecute(Void result) {
mDialog.dismiss();
};
};
帮助我们解决这个问题。 提前谢谢。
答案 0 :(得分：0)
当finish()已经呼叫onDestroy()的人查看the android documentation时，onDestroy()被触发，因此您不应在finish()上致电finish()。在onPause()事件上调用if (savedInstanceState == null) {
FragmentDisplay fragment = new FragmentDisplay();
getSupportFragmentManager().beginTransaction()
.add(android.R.id.content, fragment).commit();
}
也是一样，如果你想要实现的是从ActivityStatePager中分离你的FragmentDisplay你应该移动
onResume()进入onPause()事件，并在java.lang.IllegalArgumentException: No view found for id 0x7f060038事件中分离此片段。使用您的代码，每次活动暂停时，您都会强制调用onCreate（），这是一项耗费精力的操作。
我认为异常onResume()来自您的活动RecordList.RecordListFragment.BackgroundTask的方式。
您也可以展示NullPointerException的作用吗？ RecordList.RecordListFragment.BackgroundTask从那里开始。
添加AsyncTask.publishProgress()代码后进行修改：
好的，我想我得到了这个。在doInBackground（）上执行操作时避免访问UIThread。使用AsyncTask.onProgressUpdate()并覆盖 View composer = v.findViewById(R.id.lsComposer);
mLsComposer = ((DynamicListView) composer);
try {
mLsComposer
.setAdapter(mAdapter = new PaginationComposerAdapter(
mSP, getActivity(),
rarray, name,
label, mEventStatus));
Options(men);
} catch (Exception e) {
Log.d("exception", "this is here at composer"+e);
e.printStackTrace();
}
if (mAdapter.getCount() > 10) {
mLsComposer
.setLoadingView(getActivity()
.getLayoutInflater()
.inflate(
R.layout.lscomposer_loadingview,
null));
}
Log.d("complete","at the end");
对UI进行更改，而后台线程仍有工作要做（请查看AsynTask上的文档）。在你的情况下，你应该把
onPostExecute(){{1}}因为您希望在完成长时间工作后对UI进行更改。