[英]onPreferenceClick listener not working / onPreferenceClick not being called
[英]onPreferenceClick is not working with me
我試圖在onPreferenceClick中執行一些代碼,但是沒有用。
我進行了一次SettingActivity Calss擴展了PreferenceActivity。
然后,我實現了OnPreferenceClickListener。
這是我的設定活動課
DecimalFormat df = new DecimalFormat("@##,###,###,###");
private Calculation mCalculation;
private TextView mCalculatorDisplay;
@SuppressWarnings("deprecation")
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
addPreferencesFromResource(R.xml.settings);
}
@SuppressWarnings("deprecation")
@Override
public boolean onPreferenceClick(Preference preference) {
if (preference.getKey().equals("Point")) {
mCalculatorDisplay.setText(df.format(mCalculation.getResult()).replaceAll(",", "."));
} else if (preference.getKey().equals("Comma")) {
mCalculatorDisplay.setText(df.format(mCalculation.getResult()).replaceAll(".", ","));
} else if (preference.getKey().equals("Space")) {
mCalculatorDisplay.setText(df.format(mCalculation.getResult()).replaceAll(",", " "));
} else if (preference.getKey().equals("Off")) {
mCalculatorDisplay.setText(df.format(mCalculation.getResult()).replaceAll(" ", ""));
getPreferenceManager().getSharedPreferences().edit()
.putInt("unreadcount", 0).commit();
}
return true;
}
這是我的arrays.xml
<string-array name="decimalNumber">
<item name="P">Point</item>
<item name="C">Comma</item>
<item name="S">Space</item>
<item name="O">Off</item>
</string-array>
<string-array name="decimalNumberValues">
<item name="P">P</item>
<item name="C">C</item>
<item name="S">S</item>
<item name="O">O</item>
</string-array>
以及xml文件夾中的settings.xml:
<PreferenceCategory android:title="@string/pref_user_settings" >
<ListPreference
android:entries="@array/decimalNumber"
android:entryValues="@array/decimalNumberValues"
android:key="prefdecimalNumber"
android:summary="@string/number_format_summary"
android:title="@string/number_format" />
</PreferenceCategory>
這是我的用戶設置的照片:
我想要做的是通過單擊每個按鈕來更改十進制數字格式。
提前致謝 :)
更新:我這樣做是為了注冊PreferenceClickListener。
@SuppressWarnings("deprecation")
@Override
protected void onPause() {
super.onPause();
getPreferenceScreen().getSharedPreferences()
.registerOnSharedPreferenceChangeListener(
(OnSharedPreferenceChangeListener) this);
}
@SuppressWarnings("deprecation")
@Override
protected void onResume() {
super.onResume();
getPreferenceScreen().getSharedPreferences()
.registerOnSharedPreferenceChangeListener(
(OnSharedPreferenceChangeListener) this);
}
public void onSharedPreferenceChanged(SharedPreferences sharedPreferences,
String key) {
if (key.equals("Point")) {
mCalculatorDisplay.setText(df.format(mCalculation.getResult())
.replaceAll(",", "."));
} else if (key.equals("Comma")) {
mCalculatorDisplay.setText(df.format(mCalculation.getResult())
.replaceAll(".", ","));
} else if (key.equals("Space")) {
mCalculatorDisplay.setText(df.format(mCalculation.getResult())
.replaceAll(",", " "));
} else if (key.equals("Off")) {
mCalculatorDisplay.setText(df.format(mCalculation.getResult())
.replaceAll(" ", ""));
}
}
它給了我這個錯誤:
05-24 11:10:24.127:E / AndroidRuntime(1025):java.lang.RuntimeException:無法恢復活動{com.com.ecalc / com.com.ecalc.Z_SettingsActivity}:java.lang.ClassCastException:com。 com.ecalc.Z_SettingsActivity無法轉換為android.content.SharedPreferences $ OnSharedPreferenceChangeListener
我認為您必須在onPause()和onStart()方法中的sharedPreferenceChangeListener上注冊對象
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