我不知道如何从 EditTextPreference 中查找值。就像当我在 Edittextpreference 中写一个数字时，我希望该数字显示在我的片段firSTLayout xml中的Textview“numTxt”中:(。
Blockquote The base for the settings menu is the "Settings Activity" where you get in Android studio, new>Activity>Settings Activity.so in the xml pref_general.xml is where the EditTextPreference is.
请查看要编辑文本字段的 imgur 照片。 Image-imgur
这是首选项 xml 文件。
<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">
<SwitchPreference
android:defaultValue="true"
android:key="example_switch"
android:summary="@string/pref_description_social_recommendations"
android:title="@string/pref_title_social_recommendations" />
<!-- NOTE: EditTextPreference accepts EditText attributes. -->
<!-- NOTE: EditTextPreference's summary should be set to its value by the activity code. -->
<EditTextPreference
android:capitalize="words"
android:defaultValue="@string/pref_default_display_name"
android:inputType="textCapWords"
android:key="example_text"
android:id="@+id/textnrisettings"
android:maxLines="1"
android:selectAllOnFocus="true"
android:singleLine="true"
android:title="@string/pref_title_display_name" />
<!-- NOTE: Hide buttons to simplify the UI. Users can touch outside the dialog to
dismiss it. -->
<!-- NOTE: ListPreference's summary should be set to its value by the activity code. -->
<ListPreference
android:defaultValue="-1"
android:entries="@array/pref_example_list_titles"
android:entryValues="@array/pref_example_list_values"
android:key="example_list"
android:negativeButtonText="@null"
android:positiveButtonText="@null"
android:title="@string/pref_title_add_friends_to_messages" />
</PreferenceScreen>这是第一个布局 xml 的 java 文件
public class FirstFragment extends Fragment {
private View view;
public FirstFragment(){
}
Button sendSMS;
Button sendSMSaon;
Button sendSMSaoff;
Button sendSMSrela1;
Button sendSMSrela2;
EditText msgTxt;
EditText aonTxt;
EditText aoffTxt;
EditText rela1txt;
EditText rela2txt;
Button taframnummer;
//Down below in Textview numTxt is where the value from the Edittextpreference will be shown
TextView numTxt;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.first_layout, container, false);
sendSMS = (Button)view.findViewById(R.id.skicka);
sendSMSaon = (Button)view.findViewById(R.id.skickaaon);
sendSMSaoff = (Button)view.findViewById(R.id.skickaaoff);
sendSMSrela1 = (Button)view.findViewById(R.id.skickarela1);
sendSMSrela2 = (Button)view.findViewById(R.id.skickarela2);
msgTxt = (EditText)view.findViewById(R.id.Textmeddelande);
numTxt = (TextView)view.findViewById(R.id.nummer);
aonTxt = (EditText)view.findViewById(R.id.aon);
aoffTxt = (EditText)view.findViewById(R.id.aoff);
rela1txt = (EditText)view.findViewById(R.id.rela1txt);
rela2txt = (EditText)view.findViewById(R.id.relä2txt);
taframnummer = (Button) view.findViewById(R.id.taframnummer);
msgTxt.setVisibility(View.INVISIBLE);
aonTxt.setVisibility(View.INVISIBLE);
aoffTxt.setVisibility(View.INVISIBLE);
rela1txt.setVisibility(View.INVISIBLE);
rela2txt.setVisibility(View.INVISIBLE);
sendSMSaoff.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String mymsgaoff = aoffTxt.getText().toString();
String theNumber = numTxt.getText().toString();
sendMsg(theNumber, mymsgaoff);
}
}
);
sendSMSaon.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String mymsgaon = aonTxt.getText().toString();
String theNumber = numTxt.getText().toString();
sendMsg(theNumber, mymsgaon);
}
}
);
sendSMS.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String myMsg = msgTxt.getText().toString();
String theNumber = numTxt.getText().toString();
sendMsg(theNumber, myMsg);
}
}
);
sendSMSrela1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String myMsgrela1 = rela1txt.getText().toString();
String theNumber = numTxt.getText().toString();
sendMsg(theNumber, myMsgrela1);
}
}
);
sendSMSrela2.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String mymsgrela2 = rela2txt.getText().toString();
String theNumber = numTxt.getText().toString();
sendMsg(theNumber, mymsgrela2);
}
}
);
return view;
}
private void sendMsg(String theNumber, String myMsg)
{
SmsManager sms = SmsManager.getDefault();
sms.sendTextMessage(theNumber, null, myMsg, null, null);
}
}最佳答案
我在您的代码中没有看到任何文本字段，如果您想将值复制到其他 Activity (屏幕)，您必须使用保存数字
SharedPreferences.Editor editor = getSharedPreferences(MY_PREFS_NAME, MODE_PRIVATE).edit();
editor.putString("numTxt", numTxt.getText());
editor.commit();
并使用
在其他 Activity 中检索号码SharedPreferences prefs = getSharedPreferences(MY_PREFS_NAME, MODE_PRIVATE); String restoredText = prefs.getString("numTxt", null);
TextView textView = (TextView) findViewById(R.id.textViewName); //your textField?
textView.setText(restoredText);
//or with EditText
//EditText editText = (EditText) findViewById(R.id.editTextName);
//editText.setText(restoredText);
关于java - Android studio 中的首选项设置如何将 EditTextPreference 中的值连接到 TextView，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/39476429/