안드로이드 Preferences 예제 따라하기

- 안드로이드에서 SharedPreferences 와 PreferenceScreen을 활용하여, 내부적인 저장을 해보자.
- 보통 어플리케이션 설정창을 이용할 때 많이 사용한다.

-Java 소스

public class Ex09_Preferences1Activity extends Activity implements

OnClickListener {

EditText text1;

EditText text2;

/** Called when the activity is first created. */

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

text1 = (EditText) this.findViewById(R.id.edittext1);

text2 = (EditText) this.findViewById(R.id.edittext2);

SharedPreferences pref = getSharedPreferences("PrefTest", 0);

String name = pref.getString("Name", "Guest");// name을 못읽었을때 guest

int no = pref.getInt("No", 0); // 저장하기위한 인자값받기

text1.setText(name);

text2.setText(no + "");

Button btn1 = (Button) findViewById(R.id.button1);

btn1.setOnClickListener(this);

}

@Override

protected void onPause() {

// TODO Auto-generated method stub

super.onPause();

SharedPreferences pref = getSharedPreferences("PrefTest", 0);

SharedPreferences.Editor edit = pref.edit();

edit.putString("Name", text1.getText().toString()); //저장된값가져오기

edit.putInt("No", Integer.parseInt(text2.getText().toString()));

edit.commit();

}

@Override

public void onClick(View arg0) {

// TODO Auto-generated method stub

Intent intent = new Intent(this, Setting.class); //PreferencesScreen 엑티비티

startActivity(intent);

}

}
--------------------------------------------------------------------------------------------------------

public class Setting extends PreferenceActivity {

@Override

protected void onCreate(Bundle savedInstanceState) {

// TODO Auto-generated method stub

super.onCreate(savedInstanceState);

addPreferencesFromResource(R.layout.settings);

}

}
 

- xml 소스
 <?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/hello" />

    <EditText

        android:id="@+id/edittext1"

        android:layout_width="fill_parent"

        android:layout_height="wrap_content" />

    <EditText

        android:id="@+id/edittext2"

        android:layout_width="fill_parent"

        android:layout_height="wrap_content" />

    <Button

        android:id="@+id/button1"

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:text="Edit Preferences" />

</LinearLayout>
--------------------------------------------------------------------------------------------------------

<?xml version="1.0" encoding="utf-8"?>

<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android"

    android:key="Pref_Screen" >

    <EditTextPreference

        android:defaultValue="0"

        android:key="age"

        android:summary="How old are you?"

        android:title="Age" />

    <CheckBoxPreference

        android:defaultValue="true"

        android:key="married"

        android:title="Are you married?" />

</PreferenceScreen>

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