SharedPreferences Android

类似iOS的NSUserDefaults,采用key-value(键值对)形式，主要用于轻量级的数据存储

public class MainActivity extends AppCompatActivity {

    private static final String TAG = "MainActivity";
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        //存
        SharedPreferences.Editor editor = getSharedPreferences("personInfo",MODE_PRIVATE).edit();
        editor.putString("name","zhangsan");
        editor.putInt("age",18);
        editor.putBoolean("married",false);
        editor.apply();

        //读
        SharedPreferences preferences = getSharedPreferences("personInfo",MODE_PRIVATE);
        String name = preferences.getString("name","");
        int age = preferences.getInt("age",0);
        boolean married = preferences.getBoolean("married",false);
        Log.d(TAG, "onCreate: " +
                name);
        Log.d(TAG, "onCreate: " +
                age);
        Log.d(TAG, "onCreate: " +
                married);

    }
}