SharedPreferences 예제

[main.xml]

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<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"     android:orientation="vertical"     android:layout_width="fill_parent"     android:layout_height="fill_parent"     >       <TextView android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:text="Activity-Private"/>           <EditText android:layout_height="wrap_content"         android:id="@+id/main_prvate"         android:layout_width="fill_parent"/>           <TextView android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:text="Shared"/>           <EditText android:layout_height="wrap_content"         android:layout_width="fill_parent"         android:id="@+id/main_shared"/>           <Button android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:id="@+id/main_saveButton"         android:text="Save"/>           <Button android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:id="@+id/main_lauchButton"         android:text="Launch Activity2"/>         </LinearLayout>

[activity2.xml]

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<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"     android:orientation="vertical"     android:layout_width="fill_parent"     android:layout_height="fill_parent"     >       <TextView android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:text="Activity-Private"/>               <EditText android:layout_height="wrap_content"         android:id="@+id/activity2_prvate"         android:layout_width="fill_parent"/>           <TextView android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:text="Shared"/>           <EditText android:layout_height="wrap_content"         android:layout_width="fill_parent"         android:id="@+id/activity2_shared"/>               <Button android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:id="@+id/activity2_saveButton"         android:text="Save"/>           <Button android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:id="@+id/activity2_closeActivity"         android:text="Back to Main" android:layout_gravity="right"/>       </LinearLayout>

[SharedPreferencesExample.java]

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public class SharedPreferencesExample extends Activity {           private EditText privateText;     private EditText sharedText;     private Button saveButton;     private Button launchButton;           // 액티비티에서 사용할 값을 저장     private SharedPreferences prvPref;           // 애플리케이션 전체에서 사용할 값     private SharedPreferences sharedPref;           private SharedPreferences.Editor prvEditor;     private SharedPreferences.Editor sharedEditor;           @Override     public void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         setContentView(R.layout.main);         // Initiate Widgets         privateText = (EditText)findViewById(R.id.main_prvate);         sharedText = (EditText)findViewById(R.id.main_shared);         saveButton = (Button)findViewById(R.id.main_saveButton);         launchButton = (Button)findViewById(R.id.main_lauchButton);                   prvPref = getPreferences(Activity.MODE_PRIVATE);         sharedPref = getSharedPreferences("pref", Activity.MODE_PRIVATE);                   prvEditor = prvPref.edit();         sharedEditor = sharedPref.edit();                             saveButton.setOnClickListener(new OnClickListener(){               @Override             public void onClick(View v) {                 String prvValue = privateText.getText().toString();                 String sharedValue = sharedText.getText().toString();                 prvEditor.putString("value", prvValue);                 sharedEditor.putString("value", sharedValue);                                   prvEditor.commit();                 sharedEditor.commit();                 Toast.makeText(SharedPreferencesExample.this, "Saved", Toast.LENGTH_SHORT).show();             }                       });                   launchButton.setOnClickListener(new OnClickListener(){               @Override             public void onClick(View v) {                 startActivity(new Intent(SharedPreferencesExample.this, Activity2.class));                               }                       });     }           public void onResume(){         super.onResume();         String prvValue = prvPref.getString("value", "");         String sharedValue = sharedPref.getString("value", "");                   privateText.setText(String.valueOf(prvValue));         sharedText.setText(String.valueOf(sharedValue));     } }

[Activity2.java]

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public class Activity2 extends Activity {       private EditText privateText;     private EditText sharedText;     private Button saveButton;     private Button finishButton;           private SharedPreferences prvPref;     private SharedPreferences sharedPref;     private SharedPreferences.Editor prvEditor;     private SharedPreferences.Editor sharedEditor;           @Override     public void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         setContentView(R.layout.activity2);                   // Initiate Widgets         privateText = (EditText)findViewById(R.id.activity2_prvate);         sharedText = (EditText)findViewById(R.id.activity2_shared);         saveButton = (Button)findViewById(R.id.activity2_saveButton);         finishButton = (Button)findViewById(R.id.activity2_closeActivity);                   prvPref = getPreferences(Activity.MODE_PRIVATE);         sharedPref = getSharedPreferences("pref", Activity.MODE_PRIVATE);                   prvEditor = prvPref.edit();         sharedEditor = sharedPref.edit();                                   saveButton.setOnClickListener(new OnClickListener(){               @Override             public void onClick(View v) {                 String prvValue = privateText.getText().toString();                 String sharedValue = sharedText.getText().toString();                 prvEditor.putString("value", prvValue);                 sharedEditor.putString("value", sharedValue);                                   prvEditor.commit();                 sharedEditor.commit();                 Toast.makeText(Activity2.this, "Saved", Toast.LENGTH_SHORT).show();             }                       });                   finishButton.setOnClickListener(new OnClickListener(){               @Override             public void onClick(View v) {                 finish();                               }                       });     }              public void onResume(){             super.onResume();             String prvValue = prvPref.getString("value", "");             String sharedValue = sharedPref.getString("value", "");                           privateText.setText(String.valueOf(prvValue));             sharedText.setText(String.valueOf(sharedValue));         }   }

SharedPreferences 설명

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