实例二
MainActivity
package com.example.test02;
import android.app.Activity;
import android.app.DatePickerDialog;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.DatePicker;
import android.widget.EditText;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.Switch;
import android.widget.Toast;
public class MainActivity extends Activity {
EditText et_birthday;
//SharedPreferences对象，用于轻量级数据存储
private SharedPreferences sp;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// 获取到轻量级存储对象
sp = getSharedPreferences("listDate", MODE_PRIVATE);
//日期获取
et_birthday = findViewById(R.id.et_birthday);
//点击日历选择日期
et_birthday.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
new DatePickerDialog(MainActivity.this, new DatePickerDialog.OnDateSetListener() {
@Override
public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) {
// 此处得到选择的时间，可以进行你想要的操作
String time = year + "-" + (monthOfYear + 1) + "-" + dayOfMonth;
et_birthday.setText(time);
}
}
// 设置初始日期
, 2021, 10, 10).show();
}
});
Button bt_submit = findViewById(R.id.bt_submit);
//保存按钮的点击事件
bt_submit.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
SharedPreferences.Editor editor = sp.edit();//必须创建在里面，不能创建在外面
StringBuilder sb = new StringBuilder();
//创建Stringbuilder对象，用于存储字符串便利
//用户名
EditText et_username = findViewById(R.id.et_username);
sb.append("用户名：" + et_username.getText());
editor.putString("name", et_username.getText().toString());
//口令
EditText et_password = findViewById(R.id.et_password);
sb.append("，口令：" + et_password.getText());
editor.putString("pass", et_password.getText().toString());
//专业
RadioGroup rg_major = findViewById(R.id.rg_major);
RadioButton rb = findViewById(rg_major.getCheckedRadioButtonId());
//getCheckedRadioButtonId 得到被cheked的按钮的id
sb.append("，专业：" + rb.getText());
editor.putString("major", rb.getText().toString());
//爱好
sb.append("，爱好：");
CheckBox cb = findViewById(R.id.cb_net);
if (cb.isChecked()) {
sb.append(cb.getText());
editor.putString("hobby1", cb.getText().toString());
} else {
editor.putString("hobby1", "empty");
}
cb = findViewById(R.id.cb_sports);
if (cb.isChecked()) {
sb.append(cb.getText());
editor.putString("hobby2", cb.getText().toString());
} else {
editor.putString("hobby2", "empty");
}
cb = findViewById(R.id.cb_reading);
if (cb.isChecked()) {
sb.append(cb.getText());
editor.putString("hobby3", cb.getText().toString());
} else {
editor.putString("hobby3", "empty");
}
//设置生日
sb.append("，出生日期：" + et_birthday.getText().toString());
editor.putString("birthday", et_birthday.getText().toString());
//激活与否
Switch switch1=(Switch)findViewById(R.id.switch1);
String s=switch1.isChecked()?"已激活":"未激活";
sb.append("，激活与否：" + s);
editor.putString("sw",s);
//显示到屏幕上
Toast.makeText(MainActivity.this, sb.toString(), Toast.LENGTH_LONG).show();
editor.commit();
//提交
}
});
Button bt_next = (Button) findViewById(R.id.bt_next);
bt_next.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
//创建intent对象,进行跳转
Intent intent = new Intent();
intent.setClass(MainActivity.this, SecondActivity.class);
startActivity(intent);
//如果不关闭当前的会出现好多个页面
MainActivity.this.finish();
}
});
}
}
SecondActivity.java
package com.example.test02;
import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.EditText;
import android.widget.TextView;
public class SecondActivity extends Activity {
EditText et_birthday;
//SharedPreferences对象，用于轻量级数据存储
private SharedPreferences sp;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.second);
// 获取到轻量级存储对象
sp = getSharedPreferences("listDate", MODE_PRIVATE);
//恢复按钮
Button bt_read = (Button) findViewById(R.id.bt_read);
bt_read.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
String name = sp.getString("name", "");
String pass = sp.getString("pass", "");
String major = sp.getString("major", "");
String hobby1 = sp.getString("hobby1", "");
String hobby2 = sp.getString("hobby2", "");
String hobby3 = sp.getString("hobby3", "");
String birthday = sp.getString("birthday", "");
String sw = sp.getString("sw", "");
//恢复用户名
TextView tv_username = findViewById(R.id.tv_username);
tv_username.setText("账号："+name);
//恢复口令
TextView tv_password = findViewById(R.id.tv_password);
tv_password.setText("密码："+pass);
//恢复专业
TextView tv_job = findViewById(R.id.tv_job);
tv_job.setText(name);
if (major.equals("软件")) {//不能直接用major=="软件"
tv_job.setText("专业："+"软件");
} else if (major.equals("物联网")) {
tv_job.setText("专业："+"物联网");
} else if (major.equals("计算机")) {
tv_job.setText("专业："+"计算机");
} else if (major.equals("大数据")) {
tv_job.setText("专业："+"大数据");
}
//恢复爱好
CheckBox cb_net = (CheckBox) findViewById(R.id.cb_net);
CheckBox cb_sports = (CheckBox) findViewById(R.id.cb_sports);
CheckBox cb_reading = (CheckBox) findViewById(R.id.cb_reading);
if (hobby1.equals("上网")) {
cb_net.setChecked(true);
}
if (hobby2.equals("运动")) {
cb_sports.setChecked(true);
}
if (hobby3.equals("读书")) {
cb_reading.setChecked(true);
}
//回复生日
TextView tv_birthday = findViewById(R.id.tv_birthday);
tv_birthday.setText("出生日期："+birthday);
//激活状态
TextView switch1 = findViewById(R.id.tv_switch);
switch1.setText("激活与否："+sw);
}
});
Button bt_next = (Button) findViewById(R.id.bt_next);
bt_next.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
//创建intent对象,进行跳转
Intent intent = new Intent();
intent.setClass(SecondActivity.this,MainActivity.class);
startActivity(intent);
//如果不关闭当前的会出现好多个页面
SecondActivity.this.finish();
}
});
}
}
activity_main.xml
second.xml
