Android SharedPreferences应用实例(记录App的使用次数)

package com.lucky.test46sharedpreferences_apply;

import android.content.SharedPreferences;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {
    SharedPreferences sharedPreferences;
    SharedPreferences.Editor editor;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //实例化SharedPreferences，参数1为name（随意命名即可）、参数2为数据存储的模式
        sharedPreferences=getSharedPreferences("lucky",MODE_WORLD_READABLE);
        editor=sharedPreferences.edit();
        int count=sharedPreferences.getInt("count",1); //读取数据
        Toast.makeText(MainActivity.this,count+"",Toast.LENGTH_SHORT).show();
        editor.putInt("count",++count); //放入需要存储的数据
        editor.commit(); //数据提交，注意：一定不能忘

    }
}