从编辑文本中的共享首选项加载字符串(两个类)

Question

我有两个不同的活动。第一个只第一次向用户显示 - 将电话号码存储在共享首选项中。我认为问题是我从 prefs 方法加载，但以防万一我会将所有内容留在这里以使其与未来的用户更相关。 看起来在这两个活动中都保存了"mobilnummer"-但是我在显示它们时遇到了问题。

这个想法是如果用户更新它就会被覆盖 - 我认为该方法会这样做吗？

启动.java

public static final String PREFS_NAME = "MobileNumberSaved";

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    mobilnummer = (EditText) findViewById(R.id.mobilnummer);

    final Button button = (Button) findViewById(R.id.ntonboarding);}
        public void SaveToMobile(View v) {
            if (mobilnummer.getText().toString().length() >= 8) {
                FragmentedUser.SaveMobile(mobilnummer.getText().toString()); // just saves to Parse.com (This works)
                SharedPreferences settings = getSharedPreferences(PREFS_NAME, 0);
                SharedPreferences.Editor editor = settings.edit();
                editor.putString("mobilnummer", mobilnummer.toString());
                editor.commit();
        }
     }

轮廓

 EditText mobilnummer;
public static final String PREFS_NAME = "MobileNumberSaved";

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    mobilnummer = (EditText) findViewById(R.id.mobilnummer);

这就是我认为的问题/问题！（下面的代码）

        SharedPreferences MobileNumberSaved =   this.getSharedPreferences("mobilnummer", Context.MODE_PRIVATE);
        String tempMobilnummer = mobilnummer.getText().toString();
        mobilnummer.setText(tempMobilnummer);

       // IF user wants to change mobilenumber
       mobilnummer.setOnEditorActionListener(new TextView.OnEditorActionListener() {
        @Override
        public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
            boolean handled = false;
            if (actionId == EditorInfo.IME_ACTION_SEND) {
                if (mobilnummer.getText().toString().length() >= 8)
                    FragmentedUser.SaveMobile(mobilnummer.getText().toString());
                SharedPreferences settings = getSharedPreferences(PREFS_NAME, 0);
                SharedPreferences.Editor editor = settings.edit();
                editor.putString("mobilnummer", mobilnummer.toString());
                editor.commit();
                tlfstatus.setImageResource(R.drawable.ok);
                handled = true;
            }
            return handled;
        }
    });

Answer 1

我认为这是你的错误：

SharedPreferences MobileNumberSaved =   this.getSharedPreferences("mobilnummer", Context.MODE_PRIVATE);
//here it should be MobileNumberSaved instead of mobilnummer, because tehre is no sense to set the same text to the textView again after you got it from there
String tempMobilnummer = MobileNumberSaved.getText().toString();
mobilnummer.setText(tempMobilnummer);

但是从共享首选项中获取值的正确方法是这样的：

SharedPreferences prefs = getSharedPreferences(PREFS_NAME, MODE_PRIVATE); 
String savedMobileNumber = prefs.getString("mobilnummer", "");
mobilnummer.setText(savedMobileNumber);

更新：当您在共享首选项中保存值时，您只保存 editText，而不是它的值，因此在保存时执行以下操作：

SharedPreferences.Editor editor = settings.edit();
//mobilnumber is your EditText, so get it's text like this
editor.putString("mobilnummer", mobilnummer.getText().toString());
editor.commit();

其他一切都和我上面写的一样