- package com.conowen.remeberPwd;
- import android.app.Activity;
- import android.content.SharedPreferences;
- import android.os.Bundle;
- import android.text.Editable;
- import android.text.InputType;
- import android.text.TextWatcher;
- import android.view.View;
- import android.view.View.OnClickListener;
- import android.widget.ArrayAdapter;
- import android.widget.AutoCompleteTextView;
- import android.widget.Button;
- import android.widget.CheckBox;
- import android.widget.EditText;
- import android.widget.Toast;
- public class RemeberPwdActivity extends Activity {
- AutoCompleteTextView cardNumAuto;
- EditText passwordET;
- Button logBT;
- CheckBox savePasswordCB;
- SharedPreferences sp;
- String cardNumStr;
- String passwordStr;
- /** Called when the activity is first created. */
- @Override
- public void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- setContentView(R.layout.main);
- cardNumAuto = (AutoCompleteTextView) findViewById(R.id.cardNumAuto);
- passwordET = (EditText) findViewById(R.id.passwordET);
- logBT = (Button) findViewById(R.id.logBT);
- sp = this.getSharedPreferences("passwordFile", MODE_PRIVATE);
- savePasswordCB = (CheckBox) findViewById(R.id.savePasswordCB);
- savePasswordCB.setChecked(true);// 默认为记住密码
- cardNumAuto.setThreshold(1);// 输入1个字母就开始自动提示
- passwordET.setInputType(InputType.TYPE_CLASS_TEXT
- | InputType.TYPE_TEXT_VARIATION_PASSWORD);
- // 隐藏密码为InputType.TYPE_TEXT_VARIATION_PASSWORD,也就是0x81
- // 显示密码为InputType.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD,也就是0x91
- cardNumAuto.addTextChangedListener(new TextWatcher() {
- @Override
- public void onTextChanged(CharSequence s, int start, int before,
- int count) {
- // TODO Auto-generated method stub
- String[] allUserName = new String[sp.getAll().size()];// sp.getAll().size()返回的是有多少个键值对
- allUserName = sp.getAll().keySet().toArray(new String[0]);
- // sp.getAll()返回一张hash map
- // keySet()得到的是a set of the keys.
- // hash map是由key-value组成的
- ArrayAdapter<String> adapter = new ArrayAdapter<String>(
- RemeberPwdActivity.this,
- android.R.layout.simple_dropdown_item_1line,
- allUserName);
- cardNumAuto.setAdapter(adapter);// 设置数据适配器
- }
- @Override
- public void beforeTextChanged(CharSequence s, int start, int count,
- int after) {
- // TODO Auto-generated method stub
- }
- @Override
- public void afterTextChanged(Editable s) {
- // TODO Auto-generated method stub
- passwordET.setText(sp.getString(cardNumAuto.getText()
- .toString(), ""));// 自动输入密码
- }
- });
- // 登陆
- logBT.setOnClickListener(new OnClickListener() {
- @Override
- public void onClick(View v) {
- // TODO Auto-generated method stub
- cardNumStr = cardNumAuto.getText().toString();
- passwordStr = passwordET.getText().toString();
- if (!((cardNumStr.equals("test")) && (passwordStr
- .equals("test")))) {
- Toast.makeText(RemeberPwdActivity.this, "密码错误,请重新输入",
- Toast.LENGTH_SHORT).show();
- } else {
- if (savePasswordCB.isChecked()) {// 登陆成功才保存密码
- sp.edit().putString(cardNumStr, passwordStr).commit();
- }
- Toast.makeText(RemeberPwdActivity.this, "登陆成功,正在获取用户数据……",
- Toast.LENGTH_SHORT).show();
- // 跳转到另一个Activity
- // do something
- }
- }
- });
- }
- }
- 布局文件:main.xml
- <?xml version="1.0" encoding="utf-8"?>
- <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
- android:layout_width="fill_parent"
- android:layout_height="fill_parent"
- android:orientation="vertical" >
- <TextView
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:layout_gravity="center_horizontal"
- android:text="简单登陆DEMO"
- android:textSize="25px" />
- <LinearLayout
- xmlns:android="http://schemas.android.com/apk/res/android"
- android:layout_width="fill_parent"
- android:layout_height="fill_parent"
- android:gravity="center"
- android:orientation="vertical" >
- <LinearLayout
- android:layout_width="250dip"
- android:layout_height="wrap_content"
- android:layout_marginLeft="10dp"
- android:layout_marginRight="10dp"
- android:layout_marginTop="15dp"
- android:orientation="vertical" >
- <LinearLayout
- android:layout_width="fill_parent"
- android:layout_height="wrap_content"
- android:orientation="horizontal" >
- <LinearLayout
- android:layout_width="fill_parent"
- android:layout_height="80px"
- android:orientation="vertical" >
- <LinearLayout
- android:layout_width="fill_parent"
- android:layout_height="40px"
- android:orientation="horizontal" >
- <TextView
- android:id="@+id/tv_account"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:layout_marginRight="10dp"
- android:text="用 户 名:"
- android:textSize="15px" />
- <AutoCompleteTextView
- android:id="@+id/cardNumAuto"
- android:layout_width="fill_parent"
- android:layout_height="40px" >
- </AutoCompleteTextView>
- </LinearLayout>
- <LinearLayout
- android:layout_width="fill_parent"
- android:layout_height="40px"
- android:orientation="horizontal" >
- <TextView
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:layout_marginRight="10dp"
- android:text="用户密码:"
- android:textSize="15px" />
- <EditText
- android:id="@+id/passwordET"
- android:layout_width="fill_parent"
- android:layout_height="40px" >
- </EditText>
- </LinearLayout>
- </LinearLayout>
- </LinearLayout>
- <LinearLayout
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:orientation="horizontal" >
- <CheckBox
- android:id="@+id/savePasswordCB"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:layout_marginLeft="20dp"
- android:text="记住密码" >
- </CheckBox>
- <Button
- android:id="@+id/logBT"
- android:layout_width="100px"
- android:layout_height="wrap_content"
- android:layout_marginLeft="40dp"
- android:layout_marginRight="10dp"
- android:text="登录" >
- </Button>
- </LinearLayout>
- </LinearLayout>
- </LinearLayout>
- </LinearLayout>
- SharedPreferences文件,在/data/data/包名/shared_prefs文件夹下面
- <?xml version='1.0' encoding='utf-8' standalone='yes' ?>
- <map>
- <string name="test">test</string>
- <string name="test2">test</string>
- <string name="test1">test</string>
- </map>
- //该片段来自于http://www.codesnippet.cn/detail/191220138147.html
来源: http://www.codesnippet.cn/detail/191220138147.html