After about 1 hour of finding solutions to my problem in related matters, I decided to expose my case. Here it is: I have an InflateException every time I try to open my PreferenceActivity.
Magazine
E/AndroidRuntime: FATAL EXCEPTION: main Process: lineo.smarteam, PID: 5087 Theme: themes:{} java.lang.RuntimeException: Unable to start activity ComponentInfo{lineo.smarteam/lineo.smarteam.activity.SettingsActivity}: android.view.InflateException: Binary XML file line #5: Error inflating class lineo.smarteam.preference.MyEditTextPreference at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2450) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2510) at android.app.ActivityThread.-wrap11(ActivityThread.java) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1363) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:148) at android.app.ActivityThread.main(ActivityThread.java:5461) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) Caused by: android.view.InflateException: Binary XML file line #5: Error inflating class lineo.smarteam.preference.MyEditTextPreference at android.preference.GenericInflater.createItem(GenericInflater.java:388) at android.preference.GenericInflater.createItemFromTag(GenericInflater.java:432) at android.preference.GenericInflater.rInflate(GenericInflater.java:483) at android.preference.GenericInflater.rInflate(GenericInflater.java:495) at android.preference.GenericInflater.inflate(GenericInflater.java:327) at android.preference.GenericInflater.inflate(GenericInflater.java:264) at android.preference.PreferenceManager.inflateFromResource(PreferenceManager.java:273) at android.preference.PreferenceFragment.addPreferencesFromResource(PreferenceFragment.java:304) at lineo.smarteam.activity.SettingsActivity$SettingsFragment.onCreate(SettingsActivity.java:57) at android.app.Fragment.performCreate(Fragment.java:2198) at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:942) at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1148) at android.app.BackStackRecord.run(BackStackRecord.java:793) at android.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1535) at android.app.FragmentController.execPendingActions(FragmentController.java:325) at android.app.Activity.performStart(Activity.java:6267) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2413) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2510) at android.app.ActivityThread.-wrap11(ActivityThread.java) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1363) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:148) at android.app.ActivityThread.main(ActivityThread.java:5461) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) Caused by: java.lang.NoSuchMethodException: <init> [class android.content.Context, interface android.util.AttributeSet]
I have a settings screen with several EditTextPreferences, which allows me to configure some integer parameters.
Res \ XML \ preferences.xml
<?xml version="1.0" encoding="utf-8"?> <PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android"> <PreferenceCategory android:title="@string/scores_category_title" android:key="pref_key_scores_settings"> <lineo.smarteam.preference.MyEditTextPreference android:title="@string/pref_title_win_score" android:inputType="numberSigned" android:maxLength="9" android:defaultValue="@integer/def_win_score" android:key="pref_key_win_score" > </lineo.smarteam.preference.MyEditTextPreference> (more of the same) </PreferenceCategory> </PreferenceScreen>
Because I'm stubborn, and I want the cursor to align at the end of the text whenever I click any preferences, I created a custom EditTextPreference.
preferences \ MyEditTextPreference.java
package lineo.smarteam.preference; import android.content.Context; import android.preference.EditTextPreference; import android.util.AttributeSet; import android.widget.EditText; public class MyEditTextPreference extends EditTextPreference { public MyEditTextPreference(Context context) { super(context); } public MyEditTextPreference(Context context, AttributeSet attrs) { super(context, attrs); } public MyEditTextPreference(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); } @Override protected void onClick() { super.onClick(); EditText et = getEditText(); et.setSelection(et.getText().length()); } }
As you can see, I have all the constructors mentioned mainly on all topics related to this problem. Then I have the actual PreferenceActivity:
activity \ SettingsActivity
package lineo.smarteam.activity; import android.app.Activity; import android.content.Context; import android.content.SharedPreferences; import android.os.Bundle; import android.preference.Preference; import android.preference.PreferenceActivity; import android.preference.PreferenceFragment; import android.preference.PreferenceManager; import android.util.Log; import android.view.MenuItem; import lineo.smarteam.MyApplication; import lineo.smarteam.R; public class SettingsActivity extends PreferenceActivity { static SharedPreferences sharedPreferences; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); Context context = this; sharedPreferences = PreferenceManager.getDefaultSharedPreferences(context); getFragmentManager().beginTransaction().replace(android.R.id.content, new SettingsFragment()).commit(); } public static class SettingsFragment extends PreferenceFragment implements SharedPreferences.OnSharedPreferenceChangeListener { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); addPreferencesFromResource(R.xml.preferences); setListeners(); }
As stated above, somewhere in this last missing piece of code, I have getActivity () calls, which, as I read somewhere, can cause this problem. The fact is that I tried to comment on all calls to this method, and the problem persists. Therefore, I came to the conclusion that this is not the reason. Also, I read that this method can throw a NullPointerException, so I always check it every time I use it.
I have a feeling that the decision is right in front of me, I just don’t see it. This was due to most of the related topics that I read.
Can someone help me find it?
thanks
EDIT:
Following Vijai's suggestion, I reinstalled the application. It still crashes in the same action, but the error has changed.
New magazine
E/AndroidRuntime: FATAL EXCEPTION: main Process: lineo.smarteam, PID: 19210 Theme: themes:{} java.lang.RuntimeException: Unable to start activity ComponentInfo{lineo.smarteam/lineo.smarteam.activity.SettingsActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.preference.Preference.setOnPreferenceChangeListener(android.preference.Preference$OnPreferenceChangeListener)' on a null object reference at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2450) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2510) at android.app.ActivityThread.-wrap11(ActivityThread.java) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1363) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:148) at android.app.ActivityThread.main(ActivityThread.java:5461) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)