Marco Castanho Marco Castanho - 27 days ago 6
Android Question

EditTextPreference causes Inflate Exception

After about 1h looking for solutions to my problem in related topics, I decided to expose my case. Here it is: I'm having an InflateException everytime I try to open my PreferenceActivity.

Log

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 Preferences screen several EditTextPreferences allowing 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 preference, I created a custom EditTextPreference.

preference\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 in basically all the topics related with this issue.
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();
}

//EDIT:
public void setListeners(){
setListenerA();
//other listeners
}

pulic void setListenerA(){
findPreference("KEY_PREF_WIN_SCORE").setOnPreferenceChangeListener() {
//(...)
}
}
}
}


As stated above, somewhere in the omitted this last piece of code, I have calls to getActivity() which, as I read somewhere, might cause this problem. The thing is I've tried commenting all calls to that method and the problem persists. Therefore I concluded that's not the cause. Also, I've read that that method might throw a NullPointerException so I'm always checking it everytime I use it.

I have a feeling the solution is right in front of me, I'm just not seeing it. It was the case for most related topics I've read.

Can someone help me find it?

Thanks

EDIT:

Following Vijai's suggestion, I reinstalled the App. It is still crashing in the same action, but the error has changed.

New Log

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)

Answer

I found it.

I was trying to find a preference whose id didn't match any in the preferences.xml file.

It was really a silly mistake. And it was in a piece of code I didn't share ate first (sorry).

Anyway, thanks to everybody who tried to help!