实验五Activity回传数据与内部存储

1.Activity序列化数据传递

package zhku.edu.exp5_1;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;

public class MainActivity extends Activity implements View.OnClickListener {
    Button btn_serializabale;
    EditText et_phone,et_name,et_major,et_age;
    int age;

    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        btn_serializabale=(Button)findViewById(R.id.zerializable);
        btn_serializabale.setOnClickListener(this);

        et_phone=(EditText)findViewById(R.id.et_phone);
        et_name=(EditText)findViewById(R.id.et_name);
        et_major=(EditText)findViewById(R.id.et_major);
        et_age=(EditText)findViewById(R.id.et_age);
    }

    @Override
    public void onClick(View v) {
        //获取电话，姓名，专业，年龄
        String phone=et_phone.getText().toString();
        String name=et_name.getText().toString();
        String major=et_major.getText().toString();
        String ageString=et_age.getText().toString();

        try {
             age=Integer.parseInt(ageString);
        }catch(Exception e){
            e.printStackTrace();
        }

        Student stu=new Student();
        stu.setPhone(phone);
        stu.setName(name);
        stu.setMajor(major);
        stu.setAge(age);

        Bundle bundle=new Bundle();
        bundle.putSerializable("student",stu);
        Intent intent=new Intent(MainActivity.this,BActivity.class);
        intent.putExtras(bundle);
        startActivity(intent);
    }
}

package zhku.edu.exp5_1;
import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

public class BActivity extends Activity {
    TextView t_phone,t_name,t_major,t_age;
    Button btn_tel;
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_b);

        Intent intent=getIntent();
        Bundle bundle=intent.getExtras();
        Student stu=(Student)bundle.getSerializable("student");

            if(stu!=null){
                String tv1=stu.getPhone();
                String tv2=stu.getName();
                String tv3=stu.getMajor();
                int tv4=stu.getAge();

                String tv5=String.valueOf(tv4);

                t_phone=(TextView)findViewById(R.id.tv_phone);
                t_name=(TextView)findViewById(R.id.tv_name);
                t_major=(TextView) findViewById(R.id.tv_major);
                t_age=(TextView)findViewById(R.id.tv_age);

                t_phone.setText(tv1);
                t_name.setText(tv2);
                t_major.setText(tv3);
                t_age.setText(tv5);
    }
        btn_tel=(Button)findViewById(R.id.btn_tel);
        btn_tel.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                String phone=t_phone.getText().toString();

                Intent it=new Intent();
                Uri callUri=Uri.parse("tel://"+phone);
                it.setAction(Intent.ACTION_DIAL);
                it.setData(callUri);
                startActivity(it);
            }
        });
    }
}

package zhku.edu.exp5_1;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.widget.TextView;

public class TelActivity extends Activity {
    TextView tv_tel;
    Student st=new Student();
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_tel);

        tv_tel=(TextView)findViewById(R.id.tv_tel);

        Intent intent=getIntent();
        //法1；Uri uri=Uri.parse("tel:12345678")可通过uri.toString()输出：tel:12345678
        //法2：Uri uri=Uri.parse("tel://12345678")可通过uri.getHost()输出：12345678
        String out=intent.getData().getHost();
        tv_tel.setText(out);
    }
}

package zhku.edu.exp5_1;
import java.io.Serializable;
public class Student implements Serializable {
    private static final long serialVersionUID=1;
    private String phone;
    private String name;
    private String major;
    private int age;

    public String getPhone() {
        return phone;
    }
    public void setPhone(String phone) {
        this.phone = phone;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getMajor() {
        return major;
    }

    public void setMajor(String major) {
        this.major = major;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }
}

Activity_main.xml



   
    
    
    
    

Activity_b.xml



    
        
        
    
    
    
    

    
        
        
    
    
        
        
    
    

Activity_tel.xml



    
    

AndriodMainfest.xml



    
        
            
                

                
            
        
        

        
            
                
                
                
            
        
    

2. Activity的SharedPreference

MainActivity.java
package zhku.edu.exp5_2;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import java.util.Date;
import java.util.Map;

public class MainActivity extends Activity{
    TextView tv_1,tv_2;
    Button btn_clear;
    Map UserInfo;
    int count;
    String date;

    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        getLoginDate();
        initView();
        changeLoginDate();
    }

    public void initView(){
        tv_1=(TextView)findViewById(R.id.tv_count);
        tv_2=(TextView)findViewById(R.id.tv_date);
        btn_clear=(Button)findViewById(R.id.btn_clear);

        tv_1.setText((count+1)+"");
        tv_2.setText(date);

        btn_clear.setOnClickListener(new View.OnClickListener() {

            public void onClick(View v) {
                MyUtils.clearUserInfo(MainActivity.this);
                tv_1.setText("0");
                tv_2.setText("无");
            }
        });
    }

    public void getLoginDate(){//获取登录信息
        UserInfo=MyUtils.getUserInfo(this);
        count=(Integer)UserInfo.get(MyUtils.NUM);
        date=(String)UserInfo.get(MyUtils.TIME);
    }

    public void changeLoginDate(){//修改登录信息
        MyUtils.saveUserInfo(this,count+1,new Date());
    }
}
MyUtils.java
package zhku.edu.exp5_2;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;

import android.content.Context;
import android.content.SharedPreferences;


public class MyUtils {// 创建工具类封装
    public static final String NAME="data";
    public static final String NUM="count";
    public static final String TIME="date";

    public static void saveUserInfo(Context context, int count, Date date){
//保存Preference
        SharedPreferences sp = context.getSharedPreferences(NAME,
                Context.MODE_PRIVATE);
        SharedPreferences.Editor edit = sp.edit();
        edit.putInt(NUM, count);//更新登录次数
        DateFormat df = new SimpleDateFormat("yyyy‐MM‐dd hh:mm:ss");//更新登录时间
        edit.putString(TIME, df.format(date));//格式化当前日期，以字符串保存
        edit.commit();
    }
    public static Map getUserInfo(Context context) {
        SharedPreferences sp = context.getSharedPreferences(NAME,
                Context.MODE_PRIVATE);
        int count = sp.getInt(NUM, 0);//获取登录次数
        String date = sp.getString(TIME, "无");//获取上次登录时间
        Map data = new HashMap();
        data.put(NUM, new Integer(count));
        data.put(TIME, date);
        return data;//以Map 数据返回
    }
    public static void clearUserInfo(Context context) {
        SharedPreferences sp = context.getSharedPreferences(NAME,
                Context.MODE_PRIVATE);
        SharedPreferences.Editor edit = sp.edit();
        edit.clear();
        edit.commit();
    }
}