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我使用的是sharedpreferences框架,但我在与其中一个首选项进行交互时遇到了一些麻烦。我想启用我的一个选项来重置我的应用程序。要做到这一点,我想要一个对话框出现在屏幕上的确定和取消。如果用户点击确定,我想要做一堆东西。使用偏好设置的Android sharedPreferences像按钮一样工作
我可以在使用ImageView侦听器的正常活动中编写所有这些内容。但在SharedPreferences框架中,我不知道如何添加侦听器和操作。我猜想作为额外的奖励,我还需要与当前的SharedPreferences状态进行交互?
此刻我有这样的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>
,这是我的类文件
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();
}
}