我可以在编辑文本上输入文本或从微调器中选择一个预定义的文本。如果我从微调器中选择，我只在编辑文本上显示它。我想如果单击“保存”按钮，“编辑文本”中的文本将保存到“共享首选项”。现在，我将文本保存在onAfterTextChanged()上，但我希望按下按钮保存。请建议。我甚至按照教程，但没有得到太多。
MainActivity.java
private EditText message;
Spinner spinner;
Button save;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final SharedPreferences pref = PreferenceManager
.getDefaultSharedPreferences(this);
save = (Button) findViewById(R.id.save);
save.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
SharedPreferences pref = PreferenceManager.getDefaultSharedPreferences(MainActivity.this);
pref.edit().putString("autoSave", message.getText().toString()).commit();
}
}) ;
message = (EditText) findViewById(R.id.et_message);
// message.setFocusable(false);
spinner = (Spinner) findViewById(R.id.Spin_alert_message);
dbHelper = new MySQLiteHelper(MainActivity.this);
selectedContactList = dbHelper.getAllContacts();
ArrayAdapter<String> adp = new ArrayAdapter<String>(
getApplicationContext(), android.R.layout.simple_spinner_item,
alert);
spinner.setAdapter(adp);
spinner.setOnItemSelectedListener(new OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> arg0, View arg1,
int position, long id) {
// message.setSelection(pref.getString("AutoSave",""));
String selectedItem = alert[position];
message.setText(selectedItem);
// loads the text that has been stored to SP and set it to
// EditText
// to bring cursor to front
message.setSelection(message.getText().length());
}
@Override
public void onNothingSelected(AdapterView<?> arg0) {
}
});
/************************** saving custom message *****************************/
ListView contactlist = (ListView) findViewById(R.id.contactListitems);
Resources res = getResources();
adapter = new CustomAdapter(MainActivity.this, selectedContactList,
res, MainActivity.this);
contactlist.setAdapter(adapter);
答案 0 :(得分：1)
将此添加到onCreate：
save.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
SharedPreferences pref = PreferenceManager.getDefaultSharedPreferences(YourActivity.this);
pref.edit().putString("autoSave", message.getText().toString()).commit();
}
});
另请注意，您正在拨打多个电话：
final SharedPreferences pref = PreferenceManager
.getDefaultSharedPreferences(this);
和
final SharedPreferences preferences = PreferenceManager
.getDefaultSharedPreferences(this);
做同样的事情，那么为什么不重用pref变量而不是创建对同一SharedPreferences的新引用？
答案 1 :(得分：1)
这样做......
private EditText message;
Spinner spinner;
Button save;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
save = (Button) findViewById(R.id.save);
save.setOnClickListener(onAddLocationButtonPressed) ;
message = (EditText) findViewById(R.id.et_message);
// message.setFocusable(false);
spinner = (Spinner) findViewById(R.id.Spin_alert_message);
selectedContactList = dbHelper.getAllContacts();
ArrayAdapter<String> adp = new ArrayAdapter<String>(
getApplicationContext(), android.R.layout.simple_spinner_item,
alert);
spinner.setAdapter(adp);
final SharedPreferences pref = PreferenceManager
.getDefaultSharedPreferences(this);
spinner.setOnItemSelectedListener(new OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> arg0, View arg1,
int position, long id) {
// message.setSelection(pref.getString("AutoSave",""));
String selectedItem = alert[position];
message.setText(selectedItem);
// loads the text that has been stored to SP and set it to
// EditText
message.setText(pref.getString("Entered", ""));
// to bring cursor to front
message.setSelection(message.getText().length());
message.addTextChangedListener(new TextWatcher() {
@Override
public void onTextChanged(CharSequence s, int start,
int before, int count) {
// TODO Auto-generated method stub
}
@Override
public void beforeTextChanged(CharSequence s, int start,
int count, int after) {
// TODO Auto-generated method stub
}
@Override
public void afterTextChanged(Editable s) {
// TODO Auto-generated method stub
// saving text after it is changed by the user
pref.edit().putString("Entered", s.toString()).commit();
}
});
}
@Override
public void onNothingSelected(AdapterView<?> arg0) {
}
});
/************************** saving custom message *****************************/
// for saving text that user can change as per need
final SharedPreferences preferences = PreferenceManager
.getDefaultSharedPreferences(this);
// loads the text that has been stored to SP and set it to Edit Text
message.setText(preferences.getString("autoSave", ""));
// adding addTextChangedListner() to the Edit Text View
message.addTextChangedListener(new TextWatcher() {
@Override
public void onTextChanged(CharSequence s, int start, int before,
int count) {
// TODO Auto-generated method stub
}
@Override
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
// TODO Auto-generated method stub
}
@Override
public void afterTextChanged(Editable s) {
// TODO Auto-generated method stub
// saving text after it is changed by the user
preferences.edit().putString("autoSave", s.toString()).commit();
});
ListView contactlist = (ListView) findViewById(R.id.contactListitems);
Resources res = getResources();
adapter = new CustomAdapter(MainActivity.this, selectedContactList,
res, MainActivity.this);
contactlist.setAdapter(adapter);
}
private View.OnClickListener onAddLocationButtonPressed = new View.OnClickListener() {
public void onClick(View v) {
SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(MainActivity.this);
Editor editor = preferences.edit();
editor.putString("autoSave", message.getText().toString()).commit();
}
};
答案 2 :(得分：1)
on Button点击此处：
private OnClickListener onsaveButtonClick = new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
ReturningClass.setMY_NAME_PREF(getApplicationContext(), "Amresh");
ReturningClass.setMY_USERID_PREF(getApplicationContext(), "8");
}
};
ReturningClass.java：
public class ReturningClass {
private static String MY_NAME_PREF = "mystringpref";
private static String MY_USERID_PREF = "shareduserid";
public static SharedPreferences getPrefs(Context context) {
return context.getSharedPreferences("UserNameAcrossApplication",
context.MODE_PRIVATE);
}
public static String getMY_NAME_PREF(Context context) {
return getPrefs(context).getString(MY_NAME_PREF, "");
}
public static void setMY_NAME_PREF(Context context, String value) {
getPrefs(context).edit().putString(MY_NAME_PREF, value).commit();
}
public static String getMY_USERID_PREF(Context context) {
return getPrefs(context).getString(MY_USERID_PREF, "");
}
public static void setMY_USERID_PREF(Context context, String value) {
getPrefs(context).edit().putString(MY_USERID_PREF, value).commit();
}
}
你可以得到这样的值：
String Name = ReturningClass.getMY_NAME_PREF(MainActivity.this);
String Id = ReturningClass.getMY_USERID_PREF(MainActivity.this);
使用此代码，您可以在任何Activity中获取或存储值。