共享preferences？ （非常简单的问题！？） [英] Shared preferences? (Extremely simple issue!?)
问题描述
我只是想保存在共享preference从EDITTEXT用户的输入，但它不工作：
editText.setOnEditorActionListener（新TextView.OnEditorActionListener（）{
@覆盖
公共布尔onEditorAction（TextView的V，INT键code，KeyEvent的事件）{ Log.v（TAG，keyword.getString（关键字，mDefault））; //它甚至注销默认字符串** **后存储preFERENCES前 如果（键code == EditorInfo.IME_ACTION_SEND）{
editText.setText（editText.getText（）的toString（））; keywordEditor.putString（关键词，editText.getText（）的toString（））;
keywordEditor.commit（）; Log.v（TAG，keyword.getString（关键字，默认））; //正确！此线路工作
}
}
返回true;
}）;
当我第一次编辑的文字，我会先得到一个日志的 mDefault ，这是正常的，因为没有什么是存储在共享preference。
然后，我存储在共享preference东西，以确保它储存，我登录，我得到的日志我所输入的。 这意味着共享preference数据储存。
继承人的问题：我已经存储在共享preference东西后，我去一个不同的活动，我回来了，存储在共享$ P $的所有数据pference为不见了！
的第一个日志还称 mDefault 后通过各种活动进行导航。
还有什么问题呢？
编辑：
下面是我的实例：
的onCreate ：
关键字= preferenceManager.getDefaultShared preferences（本）; //创建共享preferences
keywordEditor = keyword.edit（）;
添加本作中，如果你错过了一个关键组件的例子。这是目前为我工作：
公共类Main2Activity扩展ActionBarActivity { 私人共享preferences关键字;
私人共享preferences.Editor keywordEditor;
私人字符串标记=TAG; @覆盖
保护无效的onCreate（捆绑savedInstanceState）{
super.onCreate（savedInstanceState）;
的setContentView（R.layout.activity_main2）;
关键字= preferenceManager.getDefaultShared preferences（本）; //创建共享preferences
keywordEditor = keyword.edit（）; 最终的EditText EDITTEXT =（EditText上）findViewById（R.id.et_text）;
findViewById（R.id.btn_launch）.setOnClickListener（新View.OnClickListener（）{
@覆盖
公共无效的onClick（视图v）{
意向意图=新意图（Main2Activity.this，Main22Activity.class）;
startActivity（意向）;
}
}）; editText.setOnEditorActionListener（新TextView.OnEditorActionListener（）{
@覆盖
公共布尔onEditorAction（TextView的V，INT键code，KeyEvent的事件）{
Log.v（TAG，初始+ keyword.getString（关键词，mDefault））; //它甚至注销默认字符串** **后存储preFERENCES前 如果（键code == EditorInfo.IME_ACTION_SEND）{
editText.setText（editText.getText（）的toString（））; keywordEditor.putString（关键词，editText.getText（）的toString（））;
keywordEditor.commit（）; Log.v（TAG，在preFS保存：+ keyword.getString（关键词，默认））; //正确！此线路工作
}
返回true;
}
}）;
}}
这是一个全新的安装：
我测试类型的，点击发送按钮键盘上，因此调用 onEditorAction
然后在单击推出新的活动 - >打回按钮，然后在TEST2类型的，点击发送按钮。
以下是注销认沽：
02-29 23：26：42.068 18105-18105 / com.example.naveed.myapplication V / TAG：初始：mDefault
02-29 23：26：42.136 18105-18105 / com.example.naveed.myapplication V / TAG：保存在preFS：测试02-29 23：26：53.281 18105-18105 / com.example.naveed.myapplication V / TAG：初始：测试
02-29 23：26：53.338 18105-18105 / com.example.naveed.myapplication V / TAG：保存在preFS：TEST2
如您最初看到这是mDefault，然后测试得救了。我发起了一个新的活动，就回来了。下一次，最初的是试验，因为它保存最后一次和测试2被新的值保存。
I am just trying to store the users input from an editText in a Shared Preference, but it is not working:
editText.setOnEditorActionListener(new TextView.OnEditorActionListener() {
@Override
public boolean onEditorAction(TextView v, int keycode, KeyEvent event) {
Log.v(TAG, keyword.getString("keyword", "mDefault")); //IT LOGS OUT THE DEFAULT STRING EVEN **AFTER** STORING THE PREFERENCES BEFORE
if (keycode == EditorInfo.IME_ACTION_SEND) {
editText.setText(editText.getText().toString());
keywordEditor.putString("keyword", editText.getText().toString());
keywordEditor.commit();
Log.v(TAG, keyword.getString("keyword", "default")); //CORRECT! THIS LINE WORKS
}
}
return true;
});
When I first edit the text, I will first get a log of "mDefault" which is normal, since nothing is stored in the shared preference.
Then, I store something in the shared preference, and to make sure it stored, I log and I get a log of what I typed. Which means the shared preference data WAS stored.
Heres the problem: After I have stored something in the shared preference, I go to a different activity, and I come back, and all the data stored in the shared preference is GONE!
The very first log still says mDefault after navigating through activities.
What could the problem be?
EDIT:
Here is my instantiation:
onCreate:
keyword = PreferenceManager.getDefaultSharedPreferences(this); //Making a shared preferences
keywordEditor = keyword.edit();
Adding this as an example in case you missed a key components. This is currently working for me:
public class Main2Activity extends ActionBarActivity {
private SharedPreferences keyword;
private SharedPreferences.Editor keywordEditor;
private String TAG = "TAG";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main2);
keyword = PreferenceManager.getDefaultSharedPreferences(this); //Making a shared preferences
keywordEditor = keyword.edit();
final EditText editText = (EditText) findViewById(R.id.et_text);
findViewById(R.id.btn_launch).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(Main2Activity.this, Main22Activity.class);
startActivity(intent);
}
});
editText.setOnEditorActionListener(new TextView.OnEditorActionListener() {
@Override
public boolean onEditorAction(TextView v, int keycode, KeyEvent event) {
Log.v(TAG, "Initial: " + keyword.getString("keyword", "mDefault")); //IT LOGS OUT THE DEFAULT STRING EVEN **AFTER** STORING THE PREFERENCES BEFORE
if (keycode == EditorInfo.IME_ACTION_SEND) {
editText.setText(editText.getText().toString());
keywordEditor.putString("keyword", editText.getText().toString());
keywordEditor.commit();
Log.v(TAG, "Saving in prefs: " + keyword.getString("keyword", "default")); //CORRECT! THIS LINE WORKS
}
return true;
}
});
}
}
From a fresh install:
I typed in "test" and hit the send button on keyboard therefore invoked the onEditorAction
Then clicked on launch new activity -> hit back button and typed in "test2" and hit send button.
The following is the log out put:
02-29 23:26:42.068 18105-18105/com.example.naveed.myapplication V/TAG: Initial: mDefault
02-29 23:26:42.136 18105-18105/com.example.naveed.myapplication V/TAG: Saving in prefs: test
02-29 23:26:53.281 18105-18105/com.example.naveed.myapplication V/TAG: Initial: test
02-29 23:26:53.338 18105-18105/com.example.naveed.myapplication V/TAG: Saving in prefs: test2
As you can see initially it was "mDefault" then "test" was saved. I launched a new activity and came back. Next time the initial was "test" since it was saved last time and "test2" was the new value saved.
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