实现记录密码和用户名

来源：互联网发布：网络印刷平台的趋势编辑：程序博客网时间：2024/06/05 09:47
绪论
这几天学会了用SharedPreferences类，这个类可以实现简单的存储，主要用于保存窗口状态。
效果图
代码
Welcome.javapackage com.gxs.login;import com.example.login.R;import com.gxs.listview.*;import android.os.Bundle;import android.preference.Preference;import android.app.Activity;import android.app.SearchManager.OnCancelListener;import android.content.Context;import android.content.Intent;import android.content.SharedPreferences;import android.content.SharedPreferences.Editor;import android.util.Log;import android.view.Menu;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.CheckBox;import android.widget.EditText;import android.widget.Toast;public class Welcome extends Activity implements OnClickListener{private EditText uname = null;private EditText upswd = null;private CheckBox checkbox = null;private Button login = null;SharedPreferences sp = null;     @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.layout_main);        sp = this.getSharedPreferences("userinfo", Context.MODE_PRIVATE);        init();        }       public void init(){uname = (EditText) findViewById(R.id.user_input);upswd = (EditText) findViewById(R.id.pass_input);checkbox = (CheckBox) findViewById(R.id.checkBoxLogin);    login = (Button) findViewById(R.id.new_user);    if (sp.getBoolean("auto", false))  {      uname.setText(sp.getString("uname", null));      upswd.setText(sp.getString("upswd", null));       checkbox.setChecked(true);         }    login.setOnClickListener(this);}@Overridepublic void onClick(View v) {if (v == login){String name = uname.getText().toString(); String pswd = upswd.getText().toString(); if(name.trim().equals("")){    Toast.makeText(this, "请您输入用户名！", Toast.LENGTH_SHORT).show();return;    }    if(pswd.trim().equals("")){    Toast.makeText(this, "请您输入密码！", Toast.LENGTH_SHORT).show();return;    }boolean autoLogin = checkbox.isChecked();if (autoLogin){Editor editor = sp.edit();editor.putString("uname", name);editor.putString("upswd", pswd);editor.putBoolean("auto", true);editor.commit();}else{  Editor editor = sp.edit();editor.putString("uname", null);editor.putString("upswd", null);editor.putBoolean("auto", false);editor.commit();}//Intent跳转Intent intent = new Intent(Welcome.this,Content.class);startActivity(intent);finish();}}   }Content.javapackage com.as.listview;import java.util.List;import com.example.login.R;import com.as.*;import android.app.Activity;import android.os.Bundle;import android.widget.ArrayAdapter;import android.widget.ListView;public class Content extends Activity{private ListView listview_fruits;@Overrideprotected void onCreate(Bundle savedInstanceState) {// TODO Auto-generated method stubsuper.onCreate(savedInstanceState);setContentView(R.layout.content);}}layout_main.xml<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical"     android:background="#ADD8E6">    <RelativeLayout        android:id="@+id/login_div"        android:layout_width="fill_parent"        android:layout_height="221dp"        android:layout_margin="15dip"        android:background="@drawable/btn_bg"        android:padding="15dip" >        <TextView            android:id="@+id/login_user_input"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:layout_alignParentTop="true"            android:layout_margin="5dp"            android:text="@string/user"            android:textSize="16dp"            android:typeface="sans" />        <EditText            android:id="@+id/user_input"            android:layout_width="fill_parent"            android:layout_height="wrap_content"            android:layout_below="@id/login_user_input"            android:background="@android:drawable/editbox_background"            android:inputType="text"            android:singleLine="true" />        <TextView            android:id="@+id/login_pass_input"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:layout_below="@id/user_input"            android:layout_margin="5dp"            android:text="@string/pass"            android:textSize="16dp"            android:typeface="sans" />        <EditText            android:id="@+id/pass_input"            android:layout_width="fill_parent"            android:layout_height="wrap_content"            android:layout_below="@id/login_pass_input"            android:background="@android:drawable/editbox_background"            android:inputType="textPassword"            android:singleLine="true" />        <CheckBox            android:id="@+id/checkBoxLogin"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:layout_alignLeft="@+id/pass_input"            android:layout_alignParentBottom="true"            android:text="@string/no_user" />        <Button            android:id="@+id/new_user"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:layout_alignParentBottom="true"            android:layout_alignRight="@+id/pass_input"            android:layout_marginRight="28dp"            android:onClick="To_Title"            android:text="@string/new_user" />    </RelativeLayout>     <LinearLayout         android:layout_width="match_parent"         android:layout_height="match_parent"         android:orientation="vertical" >         <TextView             android:layout_width="402dp"             android:layout_height="51dp"             android:layout_marginLeft="50dp"             android:background="@drawable/gxs_ziti" />                  <Button             android:layout_width="120dp"             android:layout_height="120dp"             android:onClick="To_fruist"             android:background="@drawable/gxs2"              android:layout_marginLeft="80dp"             />                  </LinearLayout>     </LinearLayout>content.xml<LinearLayout 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=".Welcome"     >    <TextView        android:id="@+id/textView1"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="内容"        android:textAppearance="?android:attr/textAppearanceLarge" /></LinearLayout>
0 0