經過大約1小時尋找解決我的問題的相關主題,我決定揭露我的情況。這裏是:我每次嘗試打開我的PreferenceActivity時都會遇到InflateException。EditTextPreference導致充氣異常
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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]
我有一個首選項屏幕幾個EditTextPreferences允許配置一些整數參數。
資源\ XML \的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>
因爲我固執,我希望光標在每當我點擊任何優先權文本的對齊結束,我創建了一個自定義的EditTextPreference。
偏好\ 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());
}
}
正如你所看到的,我已經基本上都與這個問題相關的議題提到的所有構造函數。 然後,我有實際PreferenceActivity:
活性\ 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() {
//(...)
}
}
}
}
如上所述,某處省略該最後一段代碼,我必須getActivity()其中,因爲我讀呼叫在某個地方,可能會導致這個問題。事情是我已經嘗試評論所有調用該方法,問題依然存在。所以我認爲這不是原因。另外,我讀過那種方法可能會拋出一個NullPointerException,所以我總是在每次使用它時檢查它。
我有一種感覺,解決方案就在我面前,我只是沒有看到它。我讀過的大多數相關主題就是這種情況。
有人可以幫我找到它嗎?
感謝
編輯:
繼Vijai的建議下,我重新安裝應用程序。它仍然在同一個動作中崩潰,但錯誤已經改變。
新日誌
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)
您是否恰好啓用了ProGuard?如果是這樣,您可能需要'@ Keep'您的自定義'偏好'。 – CommonsWare
我不知道那是什麼... –
https://developer.android.com/studio/build/shrink-code.html – CommonsWare