Android将ChangeListener设置为Preference(Android Setting ChangeListener to Preference)

Android将ChangeListener设置为Preference(Android Setting ChangeListener to Preference)

我想在单击首选项时打开一个对话框。 结果。 它什么都不做。 这是偏好活动

public class SettingsPrefActivity extends PreferenceActivity { ... Preference.OnPreferenceChangeListener changeInfoListener = new Preference.OnPreferenceChangeListener() { public boolean onPreferenceChange(Preference preference, Object newValue) { Log.i("TAG","Click in Pref"); dialogCustom(findViewById(android.R.id.content)); return true; } }; Preference prefInfo = (Preference) findPreference("pref_info"); prefInfo.setOnPreferenceChangeListener(changeInfoListener); } public void dialogCustom(View v) { Log.i("TAG","Dialog"); final Dialog dialog = new Dialog(getApplicationContext()); dialog.setContentView(R.layout.dialog_info); dialog.setTitle("INFORMATION"); dialog.setCancelable(true); Button button = (Button) dialog.findViewById(R.id.buttonOK); button.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { dialog.dismiss(); } }); dialog.show(); }

这是pref xml的一部分

<PreferenceCategory android:title="ABOUT" android:key="about_category" android:layout="@layout/prefcatcustomlayout" > <Preference android:key="pref_version" android:title="Version" android:summary="1.0" /> <Preference android:key="pref_info" android:title="Information" android:summary="" /> </PreferenceCategory>

I am trying to open a dialog when a preference is clicked. The result. It does nothing. Here is the Preference Activity

public class SettingsPrefActivity extends PreferenceActivity { ... Preference.OnPreferenceChangeListener changeInfoListener = new Preference.OnPreferenceChangeListener() { public boolean onPreferenceChange(Preference preference, Object newValue) { Log.i("TAG","Click in Pref"); dialogCustom(findViewById(android.R.id.content)); return true; } }; Preference prefInfo = (Preference) findPreference("pref_info"); prefInfo.setOnPreferenceChangeListener(changeInfoListener); } public void dialogCustom(View v) { Log.i("TAG","Dialog"); final Dialog dialog = new Dialog(getApplicationContext()); dialog.setContentView(R.layout.dialog_info); dialog.setTitle("INFORMATION"); dialog.setCancelable(true); Button button = (Button) dialog.findViewById(R.id.buttonOK); button.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { dialog.dismiss(); } }); dialog.show(); }

Here is part of the pref xml

<PreferenceCategory android:title="ABOUT" android:key="about_category" android:layout="@layout/prefcatcustomlayout" > <Preference android:key="pref_version" android:title="Version" android:summary="1.0" /> <Preference android:key="pref_info" android:title="Information" android:summary="" /> </PreferenceCategory>

最满意答案

您必须使用prefInfo.setOnPreferenceClickListener

使用此代码....

public class SettingsPrefActivity extends PreferenceActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); addPreferencesFromResource(R.xml.prefs); Preference prefInfo = (Preference) findPreference("pref_info"); prefInfo.setOnPreferenceClickListener(clickListener); } Preference.OnPreferenceClickListener clickListener = new Preference.OnPreferenceClickListener() { @Override public boolean onPreferenceClick(Preference preference) { Log.i("TAG", "Click in Pref"); dialogCustom(findViewById(android.R.id.content)); return true; } }; public void dialogCustom(View v) { Log.i("TAG","Dialog"); AlertDialog.Builder builder = new AlertDialog.Builder(this) .setTitle("INFORMATION"); builder.setNeutralButton("OK",new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog,int which) { dialog.dismiss(); }}).show(); } }

You have to use prefInfo.setOnPreferenceClickListener

Use this code ....

public class SettingsPrefActivity extends PreferenceActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); addPreferencesFromResource(R.xml.prefs); Preference prefInfo = (Preference) findPreference("pref_info"); prefInfo.setOnPreferenceClickListener(clickListener); } Preference.OnPreferenceClickListener clickListener = new Preference.OnPreferenceClickListener() { @Override public boolean onPreferenceClick(Preference preference) { Log.i("TAG", "Click in Pref"); dialogCustom(findViewById(android.R.id.content)); return true; } }; public void dialogCustom(View v) { Log.i("TAG","Dialog"); AlertDialog.Builder builder = new AlertDialog.Builder(this) .setTitle("INFORMATION"); builder.setNeutralButton("OK",new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog,int which) { dialog.dismiss(); }}).show(); } }