将数据储存到SharedPreferences

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);
            }
        });
    }
}