0

作为一个没有经验的 Android 程序员，我需要一些帮助。我正在为需要一个可以记录祈祷请求的活动的教堂设计这个应用程序（类似于制作待办事项列表）。此时我可以在列表中键入项目，但它们似乎没有保存并在使用下面的共享首选项摘录关闭后返回，也环顾这个网站，看起来我可以在没有物理按钮的情况下做到这一点按下保存。

SharedPreferences 祈祷请求 = getPreferences(Activity.MODE_PRIVATE);

ListView myListViewa = (ListView)findViewById(R.id.myListView);

SharedPreferences.Editor editor = prayerRequests.edit();

editor.putString("prayers", myListViewa.toString());

editor.apply();

整个班级都在这里：

   package com.direction.investor.prayerjournal;

   import java.util.ArrayList;



   import android.annotation.TargetApi;
   import android.app.Activity;
   import android.os.Build;
   import android.os.Bundle;
   import android.view.KeyEvent;
   import android.view.View;
   import android.widget.ArrayAdapter;
   import android.widget.EditText;
   import android.widget.ListView;
   import android.widget.TextView;
   import android.content.SharedPreferences;
   import android.content.SharedPreferences.Editor;



 public class prayerRequests extends Activity {

@TargetApi(Build.VERSION_CODES.GINGERBREAD)
public void onCreate(Bundle savedInstanceState) 
{ super.onCreate(savedInstanceState);
setContentView(R.layout.prayerrequest);

ListView myListView = (ListView)findViewById(R.id.myListView);
final EditText myEditText = (EditText)findViewById(R.id.myEditText);

final ArrayList<String> prayers = new ArrayList<String> ();

final ArrayAdapter<String> aa;

aa = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, prayers);

myListView.setAdapter(aa);



SharedPreferences prayerRequests = getPreferences(Activity.MODE_PRIVATE);

ListView myListViewa = (ListView)findViewById(R.id.myListView);

SharedPreferences.Editor editor = prayerRequests.edit();

editor.putString("prayers", myListViewa.toString());

editor.apply();






myEditText.setOnKeyListener(new View.OnKeyListener() {
    public boolean onKey(View v, int keyCode, KeyEvent event) {
        if (event.getAction() == KeyEvent.ACTION_DOWN)
            if ((keyCode == KeyEvent.KEYCODE_DPAD_CENTER) ||
                    (keyCode == KeyEvent.KEYCODE_ENTER)) {

                prayers.add(0, myEditText.getText().toString());
                aa.notifyDataSetChanged();
                myEditText.setText("");
                return true;

            }
        return false;
    }
});


}


}
4

1 回答 1

0

我建议使用数据库而不是 sharedpreferences

见http://developer.android.com/guide/topics/data/data-storage.html#db

于 2012-12-29T19:00:23.233 回答