效果图:
MainActivity.java
package jk.quickpay.login; import jk.quickpay.login.FileService; import java.util.Map; import android.app.Activity; import android.os.Bundle; import android.text.TextUtils; import android.view.Menu; import android.view.View; import android.widget.Button; import android.widget.CheckBox; import android.widget.EditText; import android.widget.Toast; public class MainActivity extends Activity { public EditText edit_name, edit_pass; public Button btn_login; public CheckBox box_remeber; public FileService fileService; protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); fileService = new FileService(this); edit_name = (EditText) findViewById(R.id.edit_name); edit_pass = (EditText) findViewById(R.id.edit_pass); btn_login = (Button) findViewById(R.id.btn_login); box_remeber = (CheckBox) findViewById(R.id.cbx_remember); btn_login.setOnClickListener(new MyOnClickListener()); Map<String, String> map = fileService.readFile("private.txt"); if (map != null) { edit_name.setText(map.get("name")); edit_pass.setText(map.get("pass")); } } public boolean onCreateOptionsMenu(Menu menu) { getMenuInflater().inflate(R.menu.main, menu); return true; } class MyOnClickListener implements View.OnClickListener { public void onClick(View v) { int id = v.getId(); switch (id) { case R.id.btn_login: String name = edit_name.getText().toString(); String pass = edit_pass.getText().toString(); if (TextUtils.isEmpty(name)) { Toast.makeText(MainActivity.this, "用户名不能为空", Toast.LENGTH_SHORT).show(); return; } else if (TextUtils.isEmpty(pass)) { Toast.makeText(MainActivity.this, "密码不能为空", Toast.LENGTH_SHORT).show(); return; } else { if (box_remeber.isChecked()) { MainActivity.this.fileService.saveToRom(name, pass, "private.txt"); Toast.makeText(MainActivity.this, "用户名和密码已保存", Toast.LENGTH_SHORT).show(); } else { Toast.makeText(MainActivity.this, "用户名和密码不需要保存", Toast.LENGTH_SHORT).show(); } } break; default: break; } } } }
FileService.java
package jk.quickpay.login; import java.io.FileInputStream; import java.io.FileOutputStream; import java.util.HashMap; import java.util.Map; import jk.quickpay.login.StreamTools; import android.content.Context; public class FileService { public Context context; public FileService(Context context) { this.context = context; } public boolean saveToRom(String name,String pass,String fileName){ try{ FileOutputStream fos=context.openFileOutput(fileName, Context.MODE_PRIVATE); String result=name+":"+pass; fos.write(result.getBytes()); fos.flush(); fos.close(); }catch(Exception e){ e.printStackTrace(); return false; } return true; } public Map<String,String> readFile(String fileName){ Map<String,String> map=null; try{ FileInputStream fis=context.openFileInput(fileName); String value=StreamTools.getValue(fis); String values[]=value.split(":"); if(values.length>0){ map=new HashMap<String, String>(); map.put("name", values[0]); map.put("pass", values[1]); } }catch(Exception e){ e.printStackTrace(); } return map; } }
StreamTools.java
package jk.quickpay.login; import java.io.ByteArrayOutputStream; import java.io.FileInputStream; public class StreamTools { public static String getValue(FileInputStream fis) throws Exception{ ByteArrayOutputStream stream=new ByteArrayOutputStream(); byte[] buffer=new byte[1024]; int length=-1; while((length=fis.read(buffer))!=-1){ stream.write(buffer,0,length); } stream.flush(); stream.close(); String value=stream.toString(); return value; } }
activity_main.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=".LoginActivity" > <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_alignParentLeft="true" android:layout_alignParentTop="true" android:orientation="vertical" > <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" > <TextView android:id="@+id/view_account" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/account" /> <EditText android:id="@+id/edit_name" android:layout_width="0dp" android:layout_height="wrap_content" android:layout_weight="1" android:ems="10" android:inputType="textPersonName" > <requestFocus /> </EditText> </LinearLayout> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" > <TextView android:id="@+id/view_pass" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/password" /> <EditText android:id="@+id/edit_pass" android:layout_width="0dp" android:layout_height="wrap_content" android:layout_weight="1" android:ems="10" android:inputType="textPassword" /> </LinearLayout> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal"> <Button android:id="@+id/btn_login" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_weight="0.1" android:text="@string/login" /> <Button android:id="@+id/btn_reg" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_weight="0.1" android:text="@string/register" /> <Button android:id="@+id/btn_out" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_weight="0.1" android:text="@string/quit" /> </LinearLayout> <CheckBox android:id="@+id/cbx_remember" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="80dp" android:text="@string/text_rember" /> </LinearLayout> </LinearLayout>
时间: 2024-09-18 02:24:31