您如何在评分栏中保存用户评分？

Question

大家好：)我有一个评分栏，它可以正常工作，但是当用户离开页面时，该评分不会保存。您如何保存用户评分？

这是代码

RatingBar ratingBar;
TextView ratingText;
SharedPreferences wmbPreference1;    
SharedPreferences.Editor editor;

@Override
protected void onCreate(Bundle savedInstanceState) {        
       super.onCreate(savedInstanceState);
       setContentView(R.layout.list_item_activity_1);       
       ratingText = (TextView) findViewById(R.id.rating);
       ((RatingBar) findViewById(R.id.ratingBar1)).setOnRatingBarChangeListener(this);    
       wmbPreference1 = PreferenceManager.getDefaultSharedPreferences(this);
}

@Override
public void onRatingChanged(RatingBar ratingBar, float rating,
boolean fromTouch) {    
       final int numStars = ratingBar.getNumStars();
       editor = wmbPreference1.edit();
       editor.putInt("numStars", numStars);
       editor.commit();  
       int ratings = wmbPreference1.getInt("numStars", 0);
       ratingText.setText(rating + "/" + ratings.toString());
}

任何帮助，将不胜感激。

Answer 1

您可以为此使用 SharedPreferences 。

返回SharedPreferences应用程序之前，请保存评级，然后从中检索评级SharedPreferences并在评级栏中进行设置。

SharedPreferences wmbPreference1,wmbPreference2;    
SharedPreferences.Editor editor;

//wmbPreference for Shared Prefs that lasts forever
wmbPreference1 = PreferenceManager.getDefaultSharedPreferences(this);

//installsp for Shared Prefs that lasts only just once each time program is running
wmbPreference2 =getApplicationContext().getSharedPreferences("MYKEY",Activity.MODE_PRIVATE);

保存值

SharedPreferences.Editor editor = wmbPreference1.edit();
editor.putString("MYKEY", "12345");
editor.commit();

您可以 检索 类似 的值

String Phonenumber = wmbPreference1.getString("MYKEY", "");

其中 的myKey 是 键名 ，通过它可以识别值..

编辑

像这样更改代码

SharedPreferences wmbPreference1;    
SharedPreferences.Editor editor;
@Override
protected void onCreate(Bundle savedInstanceState) {    
super.onCreate(savedInstanceState);
setContentView(R.layout.list_item_activity_1);  
ratingText = (TextView) findViewById(R.id.rating);
((RatingBar) findViewById(R.id.ratingBar1))
.setOnRatingBarChangeListener(this);  
wmbPreference1 = PreferenceManager.getDefaultSharedPreferences(this);      
}

@Override
public void onRatingChanged(RatingBar ratingBar, float rating,
boolean fromTouch) {
final int numStars = ratingBar.getNumStars();
editor = wmbPreference1.edit();
editor.putInt("numStars", numStars);
editor.commit();

而当您回来时，即当您想获取评分时

int ratings = wmbPreference1.getInt("numStars", 0);
ratingText.setText(rating + "/" + String.valueOf(ratings));

这里ratings将保留先前设置的评分。