3-29打卡

sharedperference
• 所花时间：5
• 代码行数：121
• 博客容量：1
• 代码如下：

package com.example.chapter07;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.view.View;
import android.widget.EditText;
import android.widget.RadioGroup;
import android.widget.Toast;

public class sharedPreference extends AppCompatActivity implements View.OnClickListener {

    private EditText et_age;
    private EditText et_class;
    private EditText et_name;
    private RadioGroup rg_sex;
    private SharedPreferences preferences;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_shared_preference);
        et_age=findViewById(R.id.et_age);
        et_class=findViewById(R.id.et_class);
        et_name=findViewById(R.id.et_name);
        rg_sex=findViewById(R.id.rg_sex);
        findViewById(R.id.bt_submit).setOnClickListener(this);
        preferences = getSharedPreferences("config", MODE_PRIVATE);
        reload();

    }

    private void reload() {
        String name =preferences.getString("name",null);
        int age=preferences.getInt("age",0);
        String sClass =preferences.getString("class",null);
        String sex=preferences.getString("sex",null);

        if(name!=null){
            et_name.setText(name);
        }
        if(age!=0){
            et_age.setText(String.valueOf(age));
        }
        if(sex!=null){
            rg_sex.check(sex.equals("男")?R.id.rb_male:R.id.rb_female);
        }
        if(sClass!=null){
            et_class.setText(sClass);
        }
    }


    @Override
    public void onClick(View v) {
        String name=et_name.getText().toString();
        String age=et_age.getText().toString();
        String sClass=et_class.getText().toString();
        String sex=rg_sex.getCheckedRadioButtonId()==(R.id.rb_female)?"女":"男";
        SharedPreferences.Editor edit = preferences.edit();
        edit.putString("name",name);
        edit.putInt("age", Integer.valueOf(age));
        edit.putString("class",sClass);
        edit.putString("sex",sex);

        boolean res=edit.commit();
        if(res){
            Toast toast = Toast.makeText(this, "提交成功", Toast.LENGTH_SHORT);
            toast.show();
        }
    }
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        >
        <TextView
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="wrap_content"
            android:text="姓    名:"
            android:textSize="17sp"
            />
       <EditText
           android:id="@+id/et_name"
           android:layout_width="0dp"
           android:layout_weight="2"
           android:layout_height="wrap_content"
           android:hint="请输入姓名"
           android:inputType="text"
           android:background="@drawable/focusedit"
           android:maxLength="10"
           />
    </LinearLayout>


    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        >
        <TextView
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="wrap_content"
            android:text="年   龄:"
            android:textSize="17sp"
            />
        <EditText
            android:id="@+id/et_age"
            android:layout_width="0dp"
            android:layout_weight="2"
            android:layout_height="wrap_content"
            android:hint="请输入年龄:"
            android:inputType="number"
            android:background="@drawable/focusedit"
            android:maxLength="5"
            />
    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        >
        <TextView
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="wrap_content"
            android:text="专    业:"
            android:textSize="17sp"
            android:maxLength="15"
            />
        <EditText
            android:id="@+id/et_class"
            android:layout_width="0dp"
            android:layout_weight="2"
            android:layout_height="wrap_content"
            android:hint="请输入专业"
            android:inputType="text"
            android:background="@drawable/focusedit"
            />
    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        >
        <TextView
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="match_parent"
            android:text="性    别:"
            android:textSize="17sp"
            />
        <RadioGroup
            android:id="@+id/rg_sex"
            android:layout_weight="1.3"
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:orientation="horizontal"
            >
            <RadioButton
                android:id="@+id/rb_male"
                android:layout_width="0dp"
                android:layout_weight="1"
                android:layout_height="wrap_content"
                android:text="男"
                />

            <RadioButton
                android:id="@+id/rb_female"
                android:layout_width="0dp"
                android:layout_weight="1"
                android:layout_height="wrap_content"
                android:text="女"
                />
        </RadioGroup>
    </LinearLayout>

    <Button
        android:id="@+id/bt_submit"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="提交"
        />

</LinearLayout>