package com.example.q;
import java.util.HashMap;
import java.util.Map;
import android.content.Context;
import android.content.SharedPreferences;
public class SPSaveQQ {
public static boolean saveUserInfo(Context context,String account,String password) {
SharedPreferences sp=context.getSharedPreferences("data", Context.MODE_PRIVATE);
SharedPreferences.Editor edit = sp.edit();
edit.putString("username", account);
edit.putString("pwd", password);
edit.commit();
return true;
}
public static Map<String, String> getUserInfo(Context context){
SharedPreferences sp=context.getSharedPreferences("data", Context.MODE_PRIVATE);
String account = sp.getString("username", null);
String password=sp.getString("pwd", null);
Map<String, String> userMap = new HashMap<String, String>();
userMap.put("account", account);
userMap.put("password", password);
return userMap;
}
}
-
package com.example.q;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.text.TextUtils;
import java.util.Map;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
public class MainActivity extends ActionBarActivity implements OnClickListener {
private Button bt1;
private EditText et1;
private EditText et2;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initView();
// Map<String, String> userInfo = FileSaveQQ.getUserInfo(this);
// if (userInfo != null) {
// et1.setText(userInfo.get("account"));
// et2.setText(userInfo.get("password"));
// }
}
private void initView() {
// TODO Auto-generated method stub
bt1 = (Button) findViewById(R.id.button1);
et1 = (EditText) findViewById(R.id.username);
et2 = (EditText) findViewById(R.id.password);
bt1.setOnClickListener(this);
}
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
switch (v.getId()) {
case R.id.button1:
String account = et1.getText().toString().trim();
String password = et2.getText().toString();
if(TextUtils.isEmpty(account)) {
Toast.makeText(this, "请输入帐号", Toast.LENGTH_SHORT).show();
return;
}
if(TextUtils.isEmpty(password)) {
Toast.makeText(this, "请输入密码", Toast.LENGTH_SHORT).show();
return;
}
Toast.makeText(this, "登陆成功", Toast.LENGTH_SHORT).show();
boolean isSaveSuccess = FileSaveQQ.saveUserInfo(this, account, password);
if (isSaveSuccess) {
Toast.makeText(this, "保存成功", Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(this, "保存失败", Toast.LENGTH_SHORT).show();
}
break;
}
}
}
package com.example.q;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import android.content.Context;
public class FileSaveQQ {
public static boolean saveUserInfo(Context context, String account, String password) {
FileOutputStream fos = null;
try {
fos = context.openFileOutput("data.txt", Context.MODE_PRIVATE);
fos.write((account + ":" + password).getBytes());
return true;
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
return false;
} finally {
try { if (fos != null) {
fos.close();
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
public static Map<String, String> getUserInfo(Context context) {
String content = "";
FileInputStream fis = null;
try {
fis = context.openFileInput("data.txt");
byte[] buffer = new byte[fis.available()];
fis.read(buffer);
content = new String(buffer);
Map<String, String> userMap = new HashMap<String, String>();
String[] infos = content.split(":");
userMap.put("account", infos[0]);
userMap.put("password", infos[1]);
return userMap;
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
return null;
} finally {
try {
if (fis != null) {
fis.close();}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.example.q.MainActivity" >
<TextView
android:id="@+id/tv_account"
android:layout_width="fill_parent"
android:layout_height="40dp"
android:layout_centerVertical="true"
android:layout_centerHorizontal="true"
android:background="#FFFFFF"
android:text="帐号:"
android:textSize="30dp"
/>
<TextView
android:id="@+id/tv_account1"
android:layout_width="fill_parent"
android:layout_height="40dp"
android:layout_below="@+id/tv_account"
android:layout_centerVertical="true"
android:background="#FFFFFF"
android:text="密码:"
android:textSize="30dp"
/>
<EditText
android:id="@+id/password"
android:layout_width="400dp"
android:layout_height="40dp"
android:layout_below="@+id/tv_account"
android:ems="10"
android:gravity="center"
android:background="@null"
/>
<EditText
android:id="@+id/username"
android:layout_width="match_parent"
android:layout_height="40dp"
android:layout_centerInParent="true"
android:ems="10"
android:gravity="center"
android:background="@null"
/>
<TextView
android:id="@+id/textView1"
android:layout_width="400dp"
android:layout_height="40dp"
android:layout_centerHorizontal="true"
android:layout_below="@+id/button1" />
<ImageView
android:id="@+id/imageView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="@+id/tv_account"
android:layout_centerHorizontal="true"
android:layout_marginBottom="43dp"
android:src="@drawable/logo" />
<Button
android:id="@+id/button1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/textView1"
android:layout_below="@+id/tv_account1"
android:layout_marginTop="56dp"
android:background="#545bcb"
android:onClick="CCC"
android:text="登录"
android:textColor="#ffffff"
android:textSize="20dp" />
</RelativeLayout>
