1 <?xml version="1.0" encoding="utf-8"?>
2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
3 android:layout_width="match_parent"
4 android:layout_height="match_parent"
5 android:background="#E6E6E6"
6 android:orientation="vertical"
7 android:padding="10dp">
8 <ImageView
9 android:layout_width="70dp"
10 android:layout_height="70dp"
11 android:layout_centerHorizontal="true"
12 android:layout_gravity="center_horizontal"
13 android:layout_marginTop="30dp"
14 android:src="@mipmap/ic_launcher_round" />
15 <LinearLayout
16 android:layout_width="match_parent"
17 android:layout_height="wrap_content"
18 android:layout_marginTop="15dp"
19 android:background="@android:color/white"
20 android:orientation="horizontal">
21 <TextView
22 android:layout_width="wrap_content"
23 android:layout_height="wrap_content"
24 android:padding="10dp"
25 android:text="账号:"
26 android:textColor="#000"
27 android:textSize="20sp" />
28 <EditText
29 android:id="@+id/et_account"
30 android:layout_width="match_parent"
31 android:layout_height="wrap_content"
32 android:layout_marginLeft="5dp"
33 android:background="@null"
34 android:padding="10dp" />
35 </LinearLayout>
36 <LinearLayout
37 android:layout_width="match_parent"
38 android:layout_height="wrap_content"
39 android:layout_marginTop="10dp"
40 android:background="@android:color/white"
41 android:orientation="horizontal">
42 <TextView
43 android:id="@+id/tv_password"
44 android:layout_width="wrap_content"
45 android:layout_height="wrap_content"
46 android:padding="10dp"
47 android:text="密码:"
48 android:textColor="#000"
49 android:textSize="20sp" />
50 <EditText
51 android:id="@+id/et_password"
52 android:layout_width="match_parent"
53 android:layout_height="wrap_content"
54 android:layout_marginLeft="5dp"
55 android:background="@null"
56 android:inputType="textPassword"
57 android:padding="10dp" />
58 </LinearLayout>
59 <Button
60 android:id="@+id/btn_login"
61 android:layout_width="match_parent"
62 android:layout_height="wrap_content"
63 android:layout_marginTop="25dp"
64 android:background="#3C8DC4"
65 android:text="登录"
66 android:textColor="@android:color/white"
67 android:textSize="20sp" />
68 </LinearLayout>
1 package cn.itcast.saveqq;
2
3 import android.os.Bundle;
4 import android.support.v7.app.AppCompatActivity;
5 import android.text.TextUtils;
6 import android.view.View;
7 import android.widget.Button;
8 import android.widget.EditText;
9 import android.widget.Toast;
10
11 import java.util.Map;
12
13 public class MainActivity extends AppCompatActivity implements View.OnClickListener
14 {
15 private EditText et_account; //账号输入框
16 private EditText et_password; //密码输入框
17 private Button btn_login; //登录按钮
18 @Override
19 protected void onCreate(Bundle savedInstanceState) {
20 super.onCreate(savedInstanceState);
21 setContentView(R.layout.activity_main);
22 initView();
23 //通过工具类FileSaveQQ中的getUserInfo()方法获取QQ账号和密码信息
24 // Map<String, String> userInfo = FileSaveQQ.getUserInfo(this);
25 Map<String, String> userInfo = SPSaveQQ.getUserInfo(this);
26 if (userInfo != null) {
27 et_account.setText(userInfo.get("account")); //将获取的账号显示到界面上
28 et_password.setText(userInfo.get("password")); //将获取的密码显示到界面上
29 }
30 }
31 private void initView() {
32 et_account = (EditText) findViewById(R.id.et_account);
33 et_password = (EditText) findViewById(R.id.et_password);
34 btn_login = (Button) findViewById(R.id.btn_login);
35 //设置按钮的点击监听事件
36 btn_login.setOnClickListener(this);
37 }
38 @Override
39 public void onClick(View v) {
40 switch (v.getId()) {
41 case R.id.btn_login:
42 //当点击登录按钮时，获取界面上输入的QQ账号和密码
43 String account = et_account.getText().toString().trim();
44 String password = et_password.getText().toString();
45 //检验输入的账号和密码是否为空
46 if (TextUtils.isEmpty(account)) {
47 Toast.makeText(this, "请输入QQ账号", Toast.LENGTH_SHORT).show();
48 return;
49 }
50 if (TextUtils.isEmpty(password)) {
51 Toast.makeText(this, "请输入密码", Toast.LENGTH_SHORT).show();
52 return;
53 }
54 Toast.makeText(this, "登录成功", Toast.LENGTH_SHORT).show();
55 //保存用户信息
56 boolean isSaveSuccess = FileSaveQQ.saveUserInfo(this, account,
57 password);
58 /* boolean isSaveSuccess = SPSaveQQ.saveUserInfo(this, account, password);*/
59 if (isSaveSuccess) {
60 Toast.makeText(this, "保存成功", Toast.LENGTH_SHORT).show();
61 } else {
62 Toast.makeText(this, "保存失败", Toast.LENGTH_SHORT).show();
63 }
64 break;
65 }
66 }
67 }
1 package cn.itcast.saveqq;
2
3 import android.content.Context;
4 import android.util.Log;
5
6 import java.io.FileInputStream;
7 import java.io.FileOutputStream;
8 import java.io.IOException;
9 import java.util.HashMap;
10 import java.util.Map;
11
12 public class FileSaveQQ {
13 //保存QQ账号和登录密码到data.txt文件中
14 public static boolean saveUserInfo(Context context, String account, String
15 password) {
16 FileOutputStream fos = null;
17 try {
18 //获取文件的输出流对象fos
19 fos = context.openFileOutput("data.txt",
20 Context.MODE_PRIVATE);
21 //将数据转换为字节码的形式写入data.txt文件中
22 fos.write((account + ":" + password).getBytes());
23 return true;
24 } catch (Exception e) {
25 e.printStackTrace();
26 return false;
27 }finally {
28 try {
29 if(fos != null){
30 fos.close();
31 }
32 } catch (IOException e) {
33 e.printStackTrace();
34 }
35 }
36 }
37 //从data.txt文件中获取存储的QQ账号和密码
38 public static Map<String, String> getUserInfo(Context context) {
39 String content = "";
40 FileInputStream fis = null;
41 try {
42 //获取文件的输入流对象fis
43 fis = context.openFileInput("data.txt");
44 //将输入流对象中的数据转换为字节码的形式
45 byte[] buffer = new byte[fis.available()];
46 fis.read(buffer);//通过read()方法读取字节码中的数据
47 content = new String(buffer); //将获取的字节码转换为字符串
48 Map<String, String> userMap = new HashMap<String, String>();
49 String[] infos = content.split(":");//将字符串以“：”分隔后形成一个数组的形式
50 userMap.put("account", infos[0]); //将数组中的第一个数据放入userMap集合中
51 userMap.put("password", infos[1]); //将数组中的第二个数据放入userMap集合中
52 return userMap;
53 } catch (Exception e) {
54 e.printStackTrace();
55 return null;
56 }finally {
57 try {
58 if(fis != null){
59 fis.close();
60 }
61 } catch (IOException e) {
62 e.printStackTrace();
63 }
64 }
65 }
66 }
1 package cn.itcast.saveqq;
2
3 import android.content.Context;
4 import android.content.SharedPreferences;
5
6 import java.util.HashMap;
7 import java.util.Map;
8
9 public class SPSaveQQ{
10 // 保存QQ账号和登录密码到data.xml文件中
11 public static boolean saveUserInfo(Context context, String account,
12 String password) {
13 SharedPreferences sp = context.getSharedPreferences("data",
14 Context.MODE_PRIVATE);
15 SharedPreferences.Editor edit = sp.edit();
16 edit.putString("userName", account);
17 edit.putString("pwd", password);
18 edit.commit();
19 return true;
20 }
21 //从data.xml文件中获取存储的QQ账号和密码
22 public static Map<String, String> getUserInfo(Context context) {
23 SharedPreferences sp = context.getSharedPreferences("data",
24 Context.MODE_PRIVATE);
25 String account = sp.getString("userName", null);
26 String password = sp.getString("pwd", null);
27 Map<String, String> userMap = new HashMap<String, String>();
28 userMap.put("account", account);
29 userMap.put("password", password);
30 return userMap;
31 }
32 }
