我的主要活动如下。正如在这段代码中m试图设置各种年龄的值，empid等但是当我加载值时，我无法获得ice1和ice2的值，而其他值如age和empid很容易被检索。我无法找到错误。
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
SharedPrefManager.Init(this);
try{SharedPrefManager.LoadFromPref();}
catch (Exception e)
{
Toast.makeText(this, "No Previous Data ", Toast.LENGTH_LONG).show();
}
editTextName = (EditText) findViewById(R.id.editTextEnterName);
editTextEmpID = (EditText) findViewById(R.id.editTextEnterEid);
editTextAge = (EditText) findViewById(R.id.editTextEnterAge);
editTextBloodGroup = (EditText) findViewById(R.id.editTextEnterBloodGroup);
editTextICE1 = (EditText) findViewById(R.id.editTextEnterICE1);
editTextICE2 = (EditText) findViewById(R.id.editTextEnterICE2);
buttonLoad = (Button) findViewById(R.id.buttonLoad);
try {
buttonLoad.performClick();
} catch(Exception e)
{
Toast.makeText(this,"This is not working",Toast.LENGTH_LONG).show();
}
}
public void onClickStore(View v)
{
if (editTextAge.getText().toString().trim().length() > 0 && editTextName.getText().toString().trim().length() > 0 && editTextEmpID.getText().toString().trim().length() > 0 && editTextBloodGroup.getText().toString().trim().length() > 0 && editTextICE1.getText().toString().trim().length() > 0 && editTextICE2.getText().toString().trim().length() > 0) {
//get user input first, then store. we will use our SharedPrefManager Class functions
//convert EditText to string
String srtTextName = editTextName.getText().toString();
String srtTextEmpID = editTextEmpID.getText().toString();
String strTextAge = editTextAge.getText().toString();
String srtTextBloodGroup = editTextBloodGroup.getText().toString();
String strTextICE2 = editTextICE2.getText().toString();
String iTextICE1=editTextICE1.getText().toString();
if (0 != srtTextName.length())
SharedPrefManager.SetName(srtTextName); // need string value so convert it
if (0 != srtTextEmpID.length())
SharedPrefManager.SetEmployeeID(Integer.parseInt(srtTextEmpID)); // need string value so convert it
if (0 != strTextAge.length())
SharedPrefManager.SetAge(Integer.parseInt(strTextAge)); // need integer value so convert it
if (0 != srtTextBloodGroup.length())
SharedPrefManager.SetBloodGroup(srtTextBloodGroup); // need string value so convert it
if (0 != iTextICE1.length())
SharedPrefManager.SetICE1(Integer.parseInt(iTextICE1)); // need string value so convert it
if (0 != strTextICE2.length())
SharedPrefManager.SetICE2(Integer.parseInt(strTextICE2));
//now save all to shared pref, all updated values are now available in SharedPrefManager class, as we set above
SharedPrefManager.StoreToPref();
//reset all fields to blank before load and update from sharedpref
EditText tv = null;
tv = (EditText) findViewById(R.id.editTextEnterName);
tv.setText("");
tv = (EditText) findViewById(R.id.editTextEnterEid);
tv.setText("");
tv = (EditText) findViewById(R.id.editTextEnterAge);
tv.setText("");
tv = (EditText) findViewById(R.id.editTextEnterBloodGroup);
tv.setText("");
tv = (EditText) findViewById(R.id.editTextEnterICE1);
tv.setText("");
tv = (EditText) findViewById(R.id.editTextEnterICE2);
tv.setText("");
Toast.makeText(this, "Ice2 "+ strTextICE2, Toast.LENGTH_LONG).show();
//Toast.makeText(this, "Ice1 "+iTextICE1, Toast.LENGTH_LONG).show();
// Toast.makeText(this, "Data Successfully Stored ", Toast.LENGTH_LONG).show();
// SharedPrefManager.LoadFromPref();
//After saving data,data should be displayed also,so here we will call load button functionality explicitly
// try{ buttonLoad.performClick(); }
// catch (Exception e){ Toast.makeText(this, "Your Who Am I Section is having no details!", Toast.LENGTH_LONG).show();}
}
else{
Toast.makeText(this, "Please Fill all fields! :)", Toast.LENGTH_LONG).show();
}
}
public void onClickLoad(View v) {
String strTextName, strTextBloodGroup;
int iTextAge, iTextEmpID, iTextICE1, iTextICE2;
//Get all values from SharedPrefference file
SharedPrefManager.LoadFromPref(); // all values are loaded into corresponding variables of SharedPrefManager class
//Now get the values form SharedPrefManager class using it's static functions.
strTextName = SharedPrefManager.GetName();
iTextEmpID = SharedPrefManager.GetEmployeeID();
iTextAge = SharedPrefManager.GetAge();
strTextBloodGroup = SharedPrefManager.GetBloodGroup();
iTextICE1 = SharedPrefManager.GetICE1();
iTextICE2 = SharedPrefManager.GetICE2();
//Now we can show these persistent values on our activity (GUI)
EditText tv = null;
tv = (EditText) findViewById(R.id.editTextEnterName);
tv.setText(strTextName);
tv = (EditText) findViewById(R.id.editTextEnterEid);
tv.setText(String.valueOf(iTextEmpID));
tv = (EditText) findViewById(R.id.editTextEnterAge);
tv.setText(String.valueOf(iTextAge));
tv = (EditText) findViewById(R.id.editTextEnterBloodGroup);
tv.setText(strTextBloodGroup);
tv = (EditText) findViewById(R.id.editTextEnterICE1);
tv.setText(String.valueOf(iTextICE1));
tv = (EditText) findViewById(R.id.editTextEnterICE2);
tv.setText(String.valueOf(iTextICE2));
// Toast.makeText(this,"Ice 1"+iTextICE1,Toast.LENGTH_LONG).show();
//Toast.makeText(this,"Ice 2"+iTextICE2,Toast.LENGTH_LONG).show();
// Toast.makeText(this, "This Data is Used in Beacon!", Toast.LENGTH_LONG).show();
}
public void onClickDelete(View v){
SharedPrefManager.DeleteAllEntriesFromPref();
clearForm((ViewGroup) findViewById(R.id.whoamiform));
EditText tv = null;
tv = (EditText) findViewById(R.id.editTextEnterName);
tv.setText("");
tv = (EditText) findViewById(R.id.editTextEnterEid);
tv.setText("");
tv = (EditText) findViewById(R.id.editTextEnterAge);
tv.setText("");
tv = (EditText) findViewById(R.id.editTextEnterBloodGroup);
tv.setText("");
tv = (EditText) findViewById(R.id.editTextEnterICE1);
tv.setText("");
tv = (EditText) findViewById(R.id.editTextEnterICE2);
tv.setText("");
Toast.makeText(this, "Data Successfully Deleted! You may now enter new Values!", Toast.LENGTH_LONG).show();
}
// Clears all EditTexts on Screen! Like a Boss :D
// Use this method to clear form after entries are deleted from database as values were persisting on front-end
private void clearForm(ViewGroup group)
{
for (int i = 0, count = group.getChildCount(); i < count; ++i) {
View view = group.getChildAt(i);
if (view instanceof EditText) {
((EditText)view).setText("");
}
if(view instanceof ViewGroup && (((ViewGroup)view).getChildCount() > 0))
clearForm((ViewGroup)view);
}
}
}
public class SharedPrefManager {
//this is your shared preference file name, in which we will save data
public static final String MY_EMP_PREFS = "MySharedPref";
//saving the context, so that we can call all
//shared pref methods from non activity classes.
//because getSharedPreferences required the context.
//but in activity class we can call without this context
private static Context mContext;
// will get user input in below variables, then will store in to shared pref
private static String mName = "";
private static int mEid;
private static int mAge ;
private static String mBlood = "";
private static int mICE1;
private static int mICE2;
public static void Init(Context context)
{
mContext = context;
}
public static void LoadFromPref()
{
SharedPreferences settings = mContext.getSharedPreferences(MY_EMP_PREFS, 0);
// Note here the 2nd parameter 0 is the default parameter for private access,
//Operating mode. Use 0 or MODE_PRIVATE for the default operation,
mName = settings.getString("Name",""); //
// 1st parameter Name is the key and 2nd parameter is the default if data not found
mEid = settings.getInt("EmpID",0);
mAge = settings.getInt("Age",0);
mBlood = settings.getString("Blood Group",""); //
// 1st parameter Name is the key and 2nd parameter is the default if data not found
mICE1 = settings.getInt("ICE1",0);
mICE2 = settings.getInt("ICE2",0);
}
public static void StoreToPref()
{
// get the existing preference file
SharedPreferences settings = mContext.getSharedPreferences(MY_EMP_PREFS, 0);
//need an editor to edit and save values
SharedPreferences.Editor editor = settings.edit();
editor.putString("Name",mName); // Name is the key and mName is holding the value
editor.putInt("EmpID",mEid);// EmpID is the key and mEid is holding the value
editor.putInt("Age", mAge); // Age is the key and mAge is holding the value
editor.putString("Blood Group",mBlood); // Name is the key and mName is holding the value
editor.putInt("ICE 1",mICE1);// EmpID is the key and mEid is holding the value
editor.putInt("ICE 2", mICE2); // Age is the key and mAge is holding the value
//final step to commit (save)the changes in to the shared pref
editor.commit();
}
public static void DeleteSingleEntryFromPref(String keyName)
{
SharedPreferences settings = mContext.getSharedPreferences(MY_EMP_PREFS, 0);
//need an editor to edit and save values
SharedPreferences.Editor editor = settings.edit();
editor.remove(keyName);
editor.commit();
}
public static void DeleteAllEntriesFromPref()
{
SharedPreferences settings = mContext.getSharedPreferences(MY_EMP_PREFS, 0);
//need an editor to edit and save values
SharedPreferences.Editor editor = settings.edit();
editor.clear();
editor.commit();
}
public static void SetName(String name)
{
mName=name;
}
public static void SetEmployeeID(int empID)
{
mEid = empID ;
}
public static void SetAge(int age)
{
mAge = age;
}
public static String GetName()
{
return mName ;
}
public static int GetEmployeeID()
{
return mEid ;
}
public static int GetAge()
{
return mAge ;
}
public static void SetBloodGroup(String blood)
{
mBlood =blood;
}
public static void SetICE1(int i1)
{
mICE1 = i1 ;
}
public static void SetICE2(int i2)
{
mICE2 = i2;
}
public static String GetBloodGroup()
{
return mBlood ;
}
public static int GetICE1()
{
return mICE1 ;
}
public static int GetICE2()
{
return mICE2 ;
}
}
答案 0 :(得分：2)
您在python.exe方法中拼错了ICE 1和ICE 2 ..
因此，您在保存中将其称为LoadFromPref()和ICE1，在加载方法中将其称为ICE2和ICE 1。你必须留意空间。
ICE 2在public static void LoadFromPref()
{
SharedPreferences settings = mContext.getSharedPreferences(MY_EMP_PREFS, 0);
// Note here the 2nd parameter 0 is the default parameter for private access,
//Operating mode. Use 0 or MODE_PRIVATE for the default operation,
mName = settings.getString("Name",""); //
// 1st parameter Name is the key and 2nd parameter is the default if data not found
mEid = settings.getInt("EmpID",0);
mAge = settings.getInt("Age",0);
mBlood = settings.getString("Blood Group",""); //
// 1st parameter Name is the key and 2nd parameter is the default if data not found
mICE1 = settings.getInt("ICE1",0);
mICE2 = settings.getInt("ICE2",0);
}
public static void StoreToPref()
{
// get the existing preference file
SharedPreferences settings = mContext.getSharedPreferences(MY_EMP_PREFS, 0);
//need an editor to edit and save values
SharedPreferences.Editor editor = settings.edit();
editor.putString("Name",mName); // Name is the key and mName is holding the value
editor.putInt("EmpID",mEid);// EmpID is the key and mEid is holding the value
editor.putInt("Age", mAge); // Age is the key and mAge is holding the value
editor.putString("Blood Group",mBlood); // Name is the key and mName is holding the value
editor.putInt("ICE 1",mICE1);// EmpID is the key and mEid is holding the value
editor.putInt("ICE 2", mICE2); // Age is the key and mAge is holding the value
//final step to commit (save)the changes in to the shared pref
editor.commit();
}
中，您在单词StoreToPref与您的号码之间有一个空格，在ICE中没有空格。所以就像这样调整它：
LoadFromPref答案 1 :(得分：0)
在静态变量中保存值不是最好的方法。
如果想要拥有＆＃34; getName，getAge＆＃34;这是一种变体。方法。 第二种变体更短。
public class SharedPrefManager {
public static final String MY_EMP_PREFS = "MySharedPref";
public static final String NAME = "name";
public static final String EMP_ID = "empID";
public static final String AGE = "age";
public static final String BLOOD_GROUP = "bloodGroup";
public static final String ICE_1 = "ice1";
public static final String ICE_2 = "ice2";
public static final String DEFAULT_STRING = "default";
public static final int DEFAULT_INT = 0;
static SharedPreferences sharedPreferences;
public static void init(Context context) {
sharedPreferences = context.getSharedPreferences(MY_EMP_PREFS, 0);
}
public static void deleteSingleEntryFromPref(String key) {
sharedPreferences.edit().remove(key).commit();
}
public static void deleteAll() {
sharedPreferences.edit().clear().commit();
}
public static void setName(String name) {
sharedPreferences.edit().putString(NAME, name).commit();
}
public static void setEmployeeID(int empID) {
sharedPreferences.edit().putInt(EMP_ID, empID).commit();
}
public static void setAge(int age) {
sharedPreferences.edit().putInt(AGE, age).commit();
}
public static String getName() {
return sharedPreferences.getString(NAME, DEFAULT_STRING);
}
public static int getEmployeeID() {
return sharedPreferences.getInt(EMP_ID, DEFAULT_INT);
}
public static int getAge() {
return sharedPreferences.getInt(AGE, DEFAULT_INT);
}
public static void setBloodGroup(String blood) {
sharedPreferences.edit().putString(BLOOD_GROUP, blood);
}
public static void setICE1(int i1) {
sharedPreferences.edit().putInt(ICE_1, i1).commit();
}
public static void setICE2(int i2) {
sharedPreferences.edit().putInt(ICE_2, i2).commit();
}
public static String getBloodGroup() {
return sharedPreferences.getString(BLOOD_GROUP, DEFAULT_STRING);
}
public static int getICE1() {
return sharedPreferences.getInt(ICE_1, DEFAULT_INT);
}
public static int getICE2() {
return sharedPreferences.getInt(ICE_2, DEFAULT_INT);
}
}
public class SharedPrefManager {
public static final String MY_EMP_PREFS = "MySharedPref";
public static final String NAME = "name";
public static final String EMP_ID = "empID";
public static final String AGE = "age";
public static final String BLOOD_GROUP = "bloodGroup";
public static final String ICE_1 = "ice1";
public static final String ICE_2 = "ice2";
public static final String DEFAULT_STRING = "default";
public static final int DEFAULT_INT = 0;
static SharedPreferences sharedPreferences;
public static void init(Context context) {
sharedPreferences = context.getSharedPreferences(MY_EMP_PREFS, 0);
}
public static void deleteSingleEntryFromPref(String key) {
sharedPreferences.edit().remove(key).commit();
}
public static void deleteAll() {
sharedPreferences.edit().clear().commit();
}
public static void setInt(String key, int value) {
sharedPreferences.edit().putInt(key, value).commit();
}
public static int getInt(String key) {
return sharedPreferences.getInt(key, DEFAULT_INT);
}
public static void setString(String key, String value) {
sharedPreferences.edit().putString(key, value).commit();
}
public static String getString(String key) {
return sharedPreferences.getString(key, DEFAULT_STRING);
}
}
比在你的活动类中只调用：
SharedPrefManager.init(this);
// ...
SharedPrefManager.getInt(SharedPrefManager.ICE_1);
SharedPrefManager.getString(SharedPrefManager.BLOOD_GROUP);
// ...