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我知道這不能是我認爲這是困難的。我確信我擁有我可以設想實現我的onClickListener的所有內容。我錯過了什麼,爲什麼這個力量會關閉?我已經提供了堆棧來看看。任何幫助都會很棒。這被認爲是保存用戶設置的簡單活動。如果我註釋掉這些代碼,活動將顯示活動。setOnPreferenceClickListener幫助,Forclosing當活動啓動
Preference customPref = (Preference) findPreference("customPref");
customPref.setOnPreferenceClickListener(new OnPreferenceClickListener() { //this line forcecloses every time i run the activity.
@Override
public boolean onPreferenceClick(Preference preference) {
Toast.makeText(getBaseContext(),
"The custom preference has been clicked",
Toast.LENGTH_LONG)
.show();
SharedPreferences customSharedPreference = getSharedPreferences(
"myCustomSharedPrefs", Activity.MODE_PRIVATE);
SharedPreferences.Editor editor = customSharedPreference.edit();
editor.putString("myCustomPref", "The preference has been clicked");
editor.commit();
return true;
}
});
日誌:
07-10 16:36:47.137: WARN/System.err(1042): java.lang.NullPointerException
07-10 16:36:47.147: WARN/System.err(1042): at com.nyneaxis.android.mpg.Preferences.onCreate(Preferences.java:22)
07-10 16:36:47.147: WARN/System.err(1042): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
07-10 16:36:47.157: WARN/System.err(1042): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2459)
07-10 16:36:47.157: WARN/System.err(1042): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2512)
07-10 16:36:47.157: WARN/System.err(1042): at android.app.ActivityThread.access$2200(ActivityThread.java:119)
07-10 16:36:47.157: WARN/System.err(1042): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1863)
07-10 16:36:47.167: WARN/System.err(1042): at android.os.Handler.dispatchMessage(Handler.java:99)
07-10 16:36:47.167: WARN/System.err(1042): at android.os.Looper.loop(Looper.java:123)
07-10 16:36:47.167: WARN/System.err(1042): at android.app.ActivityThread.main(ActivityThread.java:4363)
07-10 16:36:47.167: WARN/System.err(1042): at java.lang.reflect.Method.invokeNative(Native Method)
07-10 16:36:47.177: WARN/System.err(1042): at java.lang.reflect.Method.invoke(Method.java:521)
07-10 16:36:47.177: WARN/System.err(1042): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
07-10 16:36:47.177: WARN/System.err(1042): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
07-10 16:36:47.177: WARN/System.err(1042): at dalvik.system.NativeStart.main(Native Method)
看起來像'findPreference(「customPref」)'返回'null'。你能檢查一下嗎? –