SharedPreferences (임시저장)

main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity4"
    android:orientation="vertical">

    <EditText
        android:id="@+id/et_save"
        android:layout_width="100dp"
        android:layout_height="wrap_content"/>


</LinearLayout>

 

main.activity

public class MainActivity4 extends AppCompatActivity {

    EditText et_save;
    String shared = "file";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main4);

        et_save = (EditText)   findViewById(R.id.et_save);

        SharedPreferences sharedPreferences = getSharedPreferences(shared, 0);
        String value = sharedPreferences.getString("lee","");
        et_save.setText(value);

    }

    @Override
    protected void onDestroy() {
        super.onDestroy();

        SharedPreferences sharedPreferences = getSharedPreferences(shared,0);
        SharedPreferences.Editor editor = sharedPreferences.edit();
        String value = et_save.getText().toString();
        editor.putString("lee",value);
        editor.commit();
    }
}

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결과 값

• 입력된 값이 앱을 나간 후에 다시 접속 하였을 때 저장됨
• 앱을 삭제하면 적용되지는 않음