android （SharedPreferences、Intent）笔记

package com.xxxx;

import android.content.Context;
import android.content.SharedPreferences;
import butterknife.ButterKnife;

public class BindBluetoothDevice extends AppCompatActivity {
   
    //打开Preferences，名称为setting，如果存在则打开它，否则创建新的Preferences
    public SharedPreferences pkeUserSettings = null;
    //让setting处于编辑状态
    //SharedPreferences.Editor editor = userSettings.edit();
    //editor.putString("name","ATAAW");
    //editor.commit();


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_bind_bluetooth_device);
        bindBluetoothDevicethis = this;
        ButterKnife.bind(this);
        updateMenu();

        pkeUserSettings = getSharedPreferences("PkeSetting", 0);

    }
    @Override
    public void onDestroy()
    {
        super.onDestroy();
    }


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        MenuItem more = menu.add(0, 1, 0, "输入");
        more.setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS);
        if(mMenuVisible) {
            more.setVisible(true);
        } else {
            more.setVisible(false);
        }
        return super.onCreateOptionsMenu(menu);
    }
    //隐藏菜单
    private void updateMenu(){
        mMenuVisible = false;
        supportInvalidateOptionsMenu();
    }




    @Override
    protected void onPause() {
        super.onPause();
        mScanner.scanLeDevice(-1, false);
    }

    @Override
    public void onResume() {
        super.onResume();
    }

    @OnClick({R.id.imageViewBcak, R.id.mtvCommit})
    public  void OnClick(View v){
        switch (v.getId()){
            
            default:
                break;
        }
    }



}

Intent intent = new Intent(this, SecondActivity.class);
startActivity(intent);   //startActivity方法

String PkeUUID = pkeUserSettings.getString("UUID",null);

<2> 让setting处于编辑状态

SharedPreferences.Editor editor = settings.edit();

<3> 存放数据

editor.putString(“name”,”cnblogs”);
editor.putString(“URL”,”www.cnblogs.com”);

<4> 完成提交

editor.commit();