如何保存文本字段的響應而不清除

Question

我想創建一個簡單的列表樣式應用程序。我已經使用SharedPreferences成功地保存了字符串，因爲我可以在日誌中引用它，但是我希望這樣做是爲了使字符串保持附加到文本字段而不是在每次重新打開應用程序時清除（直到更改或由用戶刪除）。任何其他建議，將不勝感激。

（MainActivity）

public void go(View view) { 

    Intent intent1 = new Intent(SecondActivity.this, myPreferences.class); 

    String passGoal1 = goal1.getText().toString(); 

    intent1.putExtra("goal1", passGoal1); 

    startActivity(intent1); 
} 

如在第一個答案引用另外實施myPreferences類。

public class myPreferences { 

    private SharedPreferences pref; 

    private SharedPreferences.Editor editor; 

    private Context context; 

    int PRIVATE_MODE = 0; 

    private static final String PREF_NAME = "MyPreferencesName"; 

    public final static String KEY_NAME = "key_value"; 

    public myPreferences(Context context) { 

     this.context = context; 

     pref = context.getSharedPreferences(PREF_NAME,PRIVATE_MODE); 

     editor = pref.edit(); 
    } 

    public void setFunction(String data) { 

     editor.putString(KEY_NAME, data); 
    } 
} 

Answer 1

在您的共享偏好做出獲取存儲的數據並查看它每次在文本框

public class MyPreferences { 

private SharedPreferences pref; 

// Editor for Shared preferences 
private SharedPreferences.Editor editor; 

// Context 
private Context context; 

// Shared pref mode 
int PRIVATE_MODE = 0; 

// Sharedpref file name 
private static final String PREF_NAME = "MyPreferencesName"; 

public final static String KEY_NAME = "key_value"; 

public MyPreferences(Context context) { 
    this.context = context; 
    pref = context.getSharedPreferences(PREF_NAME, PRIVATE_MODE); 
    editor = pref.edit(); 
} 

public void setFunction(String data) { 
    editor.putString(KEY_NAME, data); 
    editor.commit(); 
} 

public String getFunction() { 
    return pref.getString(KEY_NAME, ""); 
} 
} 

而在你的活動初始化SharedPreferences並執行以下操作get函數：

private MyPreferences myPreferences; 
@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 

    myPreferences = new MyPreferences(this); 

    //To set EditText data from SavedPreferences 
    textField.setText(myPreferences.getFunction()); 
} 

//To save the latest data from EditText. 
@Override 
protected void onStop() { 
    Log.d("LifeCycle", "onStop: "); 
    super.onStop(); 
    myPreferences.setFunction(editText.getText().toString()); 
}