1.activity_main.xml
<?xml version="1.0" encoding="utf-8"?> <LinearLayout android:id="@+id/activity_main" xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" android:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" tools:context="com.sh.sharedperferencestest.MainActivity"> <Button android:id="@+id/save_data" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="Save data" /> <Button android:id="@+id/restore_data" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="Restore data"/> </LinearLayout>
2.MainActivity.java
public class MainActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Button button =(Button)findViewById(R.id.save_data); Button restoredata = (Button)findViewById(R.id.restore_data); button.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { SharedPreferences.Editor editor = getSharedPreferences("data",MODE_PRIVATE).edit(); editor.putString("name","Tom"); editor.putInt("age",20); editor.putBoolean("married",false); editor.apply(); } }); restoredata.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { SharedPreferences pref = getSharedPreferences("data",MODE_PRIVATE); String name = pref.getString("name",""); int age = pref.getInt("age",0); Boolean married = pref.getBoolean("married",false); Log.d("MainActivity","name is"+ name); Log.d("MainActivity","age is"+ age); Log.d("MainActivity","married is"+ married); } }); } }