sharePreferences 儲存

demo 

新建android項目：
    

Layout     main.xml
       <?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="@string/demo" />
   
    <TextView
        android:id="@+id/NameView"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="@string/name"
        />
    <EditText
        android:id="@+id/nameText"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text=""
        />
   
    <TextView
        android:id="@+id/passwordView"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="@string/password"
        />
    <EditText
        android:id="@+id/passwordText"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:password="true"
        android:text=""
        />

</LinearLayout>

--------------------------------------------------------------------------------------------
activity
-----------------------

package mars.sharedPreferences;

import android.app.Activity;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.widget.EditText;

public class SharedPreferencesActivity extends Activity
{
    /** Called when the activity is first created. */
    public static final String SETTING_INFO = "SETTING_INFO";
    public static final String NAME = "NAME";
    public static final String PASSWORF = "PASSWORD";

    private EditText nameEdit; // 組件
    private EditText passwordEdit;

    @Override
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        // 獲得組件
        nameEdit = (EditText) findViewById(R.id.nameText);
        passwordEdit = (EditText) findViewById(R.id.passwordText);

        SharedPreferences settings = getSharedPreferences(SETTING_INFO, 0); // 獲得share對象

        String name = settings.getString(NAME, "");   //取出保存的name
        String password = settings.getString(PASSWORF, "");   //取出password

        nameEdit.setText(name);
        passwordEdit.setText(password);

    }

    @Override
    protected void onStop()
    {
        // TODO Auto-generated method stub
        super.onStop();
        SharedPreferences settings = getSharedPreferences(SETTING_INFO, 0);
        settings.edit().putString(NAME, nameEdit.getText().toString())
                .putString(PASSWORF, passwordEdit.getText().toString());

    }

}