Question

如何在SharedPreferences中保存TextView值，请参阅下面的代码，让我知道如何存储到SharedPreferences并在onCreate中检索（..）

我的代码如下：

@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_login);

        txtOperative = (TextView) findViewById(R.id.currentOperative);
        txtEvent = (TextView) findViewById(R.id.currentEvent);

        intent = getIntent();
        strEventName = intent.getStringExtra("eventName");
        strOperativeName = intent.getStringExtra("operativeName");

        txtEvent.setText(strEventName);
        txtOperative.setText(strOperativeName);         
    }

无论何时用户返回此活动，我都希望在TextView中始终显示这些值

Answer 1

简单地使用它来保存共享首选项中的TextView值

 SharedPreferences sp = getSharedPreferences("key", 0);
 SharedPreferences.Editor sedt = sp.edit();
 sedt.putString("textvalue", txtEvent.getText().toString());
 sedt.putString("txtopertaive", txtOperative.getText().toString());
 sedt.commit();

之后，通过

在Activity类或任何其他Activity中的任意位置检索它

 SharedPreferences sp = getSharedPreferences("key", 0);
 String tValue = sp.getString("textvalue","");
 String tOperative = sp.getString("txtopertaive","");

Answer 2

要保存数据，看不到SharedPreferences的任何来电 - editor / editor.commit()

将这些功能添加到您的活动中：

当您想保存数据时：

saveDataToPreferences(context, "strEventName", valueHere);

在你的活动中，

Context context;

@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_login);
    context=this;

        txtOperative = (TextView) findViewById(R.id.currentOperative);
        txtEvent = (TextView) findViewById(R.id.currentEvent);

        intent = getIntent();
        strEventName = intent.getStringExtra("eventName");
        strOperativeName = intent.getStringExtra("operativeName");

        txtEvent.setText(getDataFromPreferences(context,"strEventName"));
        txtOperative.setText(getDataFromPreferences(context,"strEventName"));

    }

    public static void saveDataToPreferences(Context context, String key,
            String value) {
        SharedPreferences prefs = context.getSharedPreferences("your package name",
                Context.MODE_PRIVATE);
        Editor editor = prefs.edit();
        editor.putString(key, value);
        editor.commit();
    }
    public static String getDataFromPreferences(Context context, String key) {

        SharedPreferences prefs = context.getSharedPreferences("your package name",
                Context.MODE_PRIVATE);
        return prefs.getString(key, Constants.BLANK);
    }

Answer 3

要存储在共享首选项中，您的值将使用该代码。

 SharedPreferences.Editor editor = getPreferences(MODE_PRIVATE).edit();
 editor.putString("OPERATIVE", txtOperative.getText().toString());
 editor.String("EVENT", txtEvent.getText().toString());
 editor.commit();

Answer 4

使用

prefs.edit().putString(context.getString(R.string.NAME), name).commit();

为了将数据保存到共享首选项和

prefs.getString(context.getString(R.string.NAME), "");

从共享偏好设置中获取数据。

Answer 5

定义如下的编辑

private Editor editor;

并在初始化共享首选项后初始化它，如

editor = prefs.edit();

editor.putString("key1", "value1");
editor.putString("key2", "value2");
editor.commit();

要检索此值，只需调用

即可

String value = prefs.getString("key1","");

如何在SharedPreferences中保存TextView值

5 个答案: