SharedPreferences方法的基本使用

通过SharedPreferences方法创建.xml文件，存储数据 具体用法如下：     package com.example.administrator.jreduch08; import android.content.Intent; import android.content.SharedPreferences; import android.os.Bundle; import android.support.v7.app.AppCompatActivity; import android.view.View; import android.widget.Button; import android.widget.CheckBox; import android.widget.EditText; public class SharedPreferencesActivity extends AppCompatActivity { private EditText user; private EditText pwd; private Button save; private CheckBox checkBox; private CheckBox checkBox2; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); user=(EditText)findViewById(R.id.user); pwd=(EditText)findViewById(R.id.pwd); save=(Button)findViewById(R.id.save); checkBox=(CheckBox)findViewById(R.id.checkBox); checkBox2=(CheckBox)findViewById(R.id.checkBox2); //创建.xml文件 final SharedPreferences sp=getSharedPreferences("userInfo",MODE_PRIVATE); save.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { //可以记忆数据 //编辑数据 SharedPreferences.Editor editor=sp.edit(); editor.putString("userName", user.getText().toString()); //把String型转化成Int型 editor.putInt("userPwd", Integer.parseInt(pwd.getText().toString())); editor.commit(); //跳转 Intent intent=new Intent(SharedPreferencesActivity.this,Sp2Activity.class); startActivity(intent);

 

}); } }

 

跳转到

package com.example.administrator.jreduch08; import android.content.SharedPreferences; import android.os.Bundle; import android.support.v7.app.AppCompatActivity; import android.view.View; import android.widget.Button; import android.widget.Switch; public class SettingsActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_settings); Button button=(Button)findViewById(R.id.button); Switch switch1=(Switch)findViewById(R.id.switch1); Switch switch2=(Switch)findViewById(R.id.switch2); final SharedPreferences sp=getSharedPreferences("userInfo", MODE_PRIVATE); boolean choose=sp.getBoolean("choose",false); boolean choose2=sp.getBoolean("choose2",false); switch1.setChecked(choose); switch2.setChecked(choose2); button.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { finish(); } }); } }