Android PreferenceFragment应用程序中的AlertDialog
我正在尝试在我的Android PreferenceFragment应用程序中的AlertDialog,android,android-fragments,android-alertdialog,android-context,Android,Android Fragments,Android Alertdialog,Android Context,我正在尝试在我的首选项片段中创建警报对话框,以便用户可以确认他/她想要删除所有用户数据 这是我编写的代码: public class SettingsFragment extends PreferenceFragment { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); Bundle b = getArguments();
首选项片段中创建警报对话框
,以便用户可以确认他/她想要删除所有用户数据
这是我编写的代码:
public class SettingsFragment extends PreferenceFragment {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Bundle b = getArguments();
addPreferencesFromResource(R.xml.preferences);
Preference button = (Preference)findPreference(getString(R.string.Delete_user_info));
button.setOnPreferenceClickListener(new Preference.OnPreferenceClickListener() {
@TargetApi(Build.VERSION_CODES.M)
@Override
public boolean onPreferenceClick(Preference preference) {
//An Alertbuilder
new AlertDialog.Builder(getContext()) //THIS LINE CRASHES THE APP
.setMessage("Do you really want to permanently delete your likes?\nYou will not be able to restore them!!")
.setCancelable(true)
.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
new DeleteUserInfo().execute();
}
})
.setNegativeButton("No", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
dialogInterface.cancel();
}
})
.create()
.show();
return true;
}
});
}
}
这是LogCat中的结果:
11-01 18:58:38.501 29821-29821/com.astudio.andreas.mapstest E/AndroidRuntime: FATAL EXCEPTION: main
11-01 18:58:38.501 29821-29821/com.astudio.andreas.mapstest E/AndroidRuntime: Process: com.astudio.andreas.mapstest, PID: 29821
11-01 18:58:38.501 29821-29821/com.astudio.andreas.mapstest E/AndroidRuntime: java.lang.NoSuchMethodError: No virtual method getContext()Landroid/content/Context; in class Lcom/astudio/andreas/mapstest/SettingsFragment; or its super classes (declaration of 'com.astudio.andreas.mapstest.SettingsFragment' appears in /data/app/com.astudio.andreas.mapstest-1/base.apk)
11-01 18:58:38.501 29821-29821/com.astudio.andreas.mapstest E/AndroidRuntime: at com.astudio.andreas.mapstest.SettingsFragment$1.onPreferenceClick(SettingsFragment.java:41)
关于如何正确引用上下文
有什么想法吗?使用getActivity()
而不是getContext()使用getActivity()
而不是getContext()
使用getActivity()
而不是getContext()使用getActivity()
而不是getContext()
认为我已经试过了。现在有点尴尬。谢谢!我想我已经试过了。现在有点尴尬。谢谢!我想我已经试过了。现在有点尴尬。谢谢!我想我已经试过了。现在有点尴尬。谢谢!