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我使用的是sharedpreferences框架,但我在與其中一個首選項進行交互時遇到了一些麻煩。我想啓用我的一個選項來重置我的應用程序。要做到這一點,我想要一個對話框出現在屏幕上的確定和取消。如果用戶點擊確定,我想要做一堆東西。使用偏好設置的Android sharedPreferences像按鈕一樣工作
我可以在使用ImageView偵聽器的正常活動中編寫所有這些內容。但在SharedPreferences框架中,我不知道如何添加偵聽器和操作。我猜想作爲額外的獎勵,我還需要與當前的SharedPreferences狀態進行交互?
此刻我有這樣的XML
<PreferenceCategory android:title="Reset App">
<Preference
android:title="Reset App?"
android:summary="Click here to reset the App to defaults."
android:key="resetapp" />
</PreferenceCategory>
<PreferenceCategory android:title="General Settings">
<CheckBoxPreference
android:title="Enable Sounds?"
android:defaultValue="true"
android:summary="A Tick here will enable sounds throughout body-mix-ology."
android:key="enablesounds" />
<CheckBoxPreference
android:title="High performance Phone?"
android:defaultValue="false"
android:summary="If you have a high performance phone tick here to speed up body switching."
android:key="highperformancephone" />
</PreferenceCategory>
,這是我的類文件
public class Preferences extends PreferenceActivity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
addPreferencesFromResource(R.layout.preferences);
//TODO
// act on resetapp
// prompt onscreen confirmation.
}
public AlertDialog createDialog() {
return new AlertDialog.Builder(this)
.setTitle("Reset App?")
.setMessage("Are you sure? You will wipe all data from the app.")
.setPositiveButton("OK", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
Toast.makeText(getBaseContext(), "App has been reset!", Toast.LENGTH_SHORT).show();
//TODO
// clear DB
// reset sharedprefs.
}
})
.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
Toast.makeText(getBaseContext(), "App was not reset", Toast.LENGTH_SHORT).show();
}
})
.show();
}
}