密码设置，可更改密码，输入密码之后才能进入界面，例如密码正确之后才能进入查看个人信息
先看截图，界面有点儿小丑，自己根据需要在修改啦~~
[代码]java代码：
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import java.io.ByteArrayOutputStream; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; import java.lang.reflect.Field;
import android.os.Bundle; import android.app.Activity; import android.app.AlertDialog; import android.content.Context; import android.content.DialogInterface; import android.content.DialogInterface.OnKeyListener; import android.text.method.NumberKeyListener; import android.util.Log; import android.view.KeyEvent; import android.view.LayoutInflater; import android.view.View; import android.widget.EditText; import android.widget.Toast;
public class MainActivity extends Activity {
String fileName = "syspass.txt"; public boolean fileIsExists(){ try{ File f = new File(fileName); if(f.exists()==true){ return false; }else{ return true; } }catch(Exception e){ return false; } } String syspassword = null;
@Override protected void onCreate(Bundle savedInstanceState) { // TODO Auto-generated method stub super.onCreate(savedInstanceState); setContentView(R.layout.activity_main);
inputTitleDialog();
}
private void inputTitleDialog() {//获取初始密码，判断是否正确 if(!fileIsExists()==false){ FileInputStream is = null; ByteArrayOutputStream os2 = null;
try{ is = openFileInput(fileName); os2 = new ByteArrayOutputStream(); int len = 0; byte[] buffer = new byte[1024]; while((len=is.read(buffer))!=-1){ os2.write(buffer,0,len); } }catch(IOException e){ Log.i("SettingsActivity","error"); }finally{ try{ if(os2!=null){ os2.close(); } if(is!=null){ is.close(); } }catch(IOException e){ Log.i("SettingsActivity","error"); } }
if(os2!=null){ byte[] content_byte = os2.toByteArray(); syspassword = new String(content_byte); } }else{ syspassword=null; } final String syspass = syspassword; if(syspass==null){ showSetDialog(); }else{ final EditText passEdit = new EditText(this);
numericOnlyListener(passEdit);
AlertDialog builder = new AlertDialog.Builder(this) .setTitle("键入密码") .setIcon(R.drawable.ic_launcher) .setView(passEdit) .setOnKeyListener(new OnKeyListener(){ public boolean onKey(DialogInterface dialog,int keyCode,KeyEvent event){ if(keyCode == KeyEvent.KEYCODE_BACK && event.getRepeatCount()==0){ MainActivity.this.finish(); return false; } return false; } }) .setNegativeButton(getString(R.string.preference_change_password_title),//change the password new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int which) { String inputPassWord = passEdit.getText().toString(); if(!(inputPassWord.equals(syspass)) || inputPassWord==null){ Toast.makeText(MainActivity.this,"旧密码错误，请重试",Toast.LENGTH_SHORT).show(); // SettingsActivity.this.finish(); passEdit.setText(""); try{ //The following three sentences control the closing of the frame //这三句代码是设置dialog是否关闭 Field field=dialog.getClass().getSuperclass().getDeclaredField("mShowing"); field.setAccessible(true); field.set(dialog,false);//true:Close the dialog box false:The dialog box is not closed }catch(Exception e){ e.printStackTrace(); }
}else{ showSetDialog(); } } }) .setPositiveButton(getString(R.string.lockpassword_ok_label), new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int which) {
String inputPassWord = passEdit.getText().toString(); if(!(inputPassWord.equals(syspass)) ){ Toast.makeText(MainActivity.this,R.string.lockpassword_confirm_passwords_dont_match,Toast.LENGTH_SHORT).show(); MainActivity.this.finish(); } } }) .show(); builder.setCanceledOnTouchOutside(false); } }
public void showSetDialog() { //设置初始密码 LayoutInflater factory = LayoutInflater.from(this); final View textEntryView = factory.inflate(R.layout.dialog, null); final EditText editTextPass = (EditText) textEntryView.findViewById(R.id.editTextPass); final EditText editTextrePass = (EditText)textEntryView.findViewById(R.id.editTextrePass);
numericOnlyListener(editTextrePass); numericOnlyListener(editTextPass);
AlertDialog ad1 = new AlertDialog.Builder(this) .setTitle("设置密码:") .setIcon(R.drawable.ic_launcher) .setView(textEntryView) .setOnKeyListener(new OnKeyListener(){ public boolean onKey(DialogInterface dialog,int keyCode,KeyEvent event){ if(keyCode == KeyEvent.KEYCODE_BACK && event.getRepeatCount()==0){ MainActivity.this.finish(); return false; } return false; } }) .setPositiveButton("确定", new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int i) { // Prompt two passwords do not matchdestv
if(!(editTextPass.getText().toString().equals(editTextrePass.getText().toString())) || editTextPass.getText().toString().equals("") || editTextrePass.getText().toString().equals("")){// Toast.makeText(MainActivity.this,R.string.lockpassword_confirm_passwords_dont_match,Toast.LENGTH_LONG).show(); MainActivity.this.finish();
}else{
FileOutputStream os = null; try{ os = openFileOutput(fileName,Context.MODE_PRIVATE); os.write((editTextPass.getText().toString()).getBytes()); }catch(IOException e){ Log.i("MainActivity","error"); }finally{ try{ os.close(); }catch(IOException e){ Log.i("MainActivity","error"); } } } } }) .show(); ad1.setCanceledOnTouchOutside(false); }
/** * 设置输入框输入密码的类型 * 这里只能输入小写字母和数字，输入以外的都无效 * 可以根据自己的需要设置 * @param v */ public void numericOnlyListener(EditText v){ v.setKeyListener(new NumberKeyListener() {
@Override public int getInputType() { // TODO Auto-generated method stub return android.text.InputType.TYPE_CLASS_TEXT; }
@Override protected char[] getAcceptedChars() { // TODO Auto-generated method stub char numberChars[]={'a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z','1','2','3','4','5','6','7','8','9','0'}; return numberChars; } }); } } |
xml布局文件activity_main.xml 我没有添加什么东西，这个根据自己的需求输入密码正确后进入的界面
还有个dialog的布局文件
dialog.xml
[代码]java代码：
1 2 3 | <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" tools:context=".MainActivity"> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"<br> xmlns:tools="http://schemas.android.com/tools"<br> android:layout_width="match_parent"<br> android:layout_height="match_parent"<br> tools:context=".MainActivity" ><br><br> <EditText<br> android:id="@+id/editTextPass"<br> android:layout_width="fill_parent"<br> android:layout_height="wrap_content"<br> android:hint="密码" /><br><br> <EditText<br> android:id="@+id/editTextrePass"<br> android:layout_width="fill_parent"<br> android:layout_height="wrap_content"<br> android:layout_below="@+id/editTextPass"<br> android:ems="10"<br> android:hint="确认密码" /><br><br></RelativeLayout><edittext android:id="@+id/editTextPass" android:layout_width="fill_parent" android:layout_height="wrap_content" android:hint="密码"> <edittext android:id="@+id/editTextrePass" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_below="@+id/editTextPass" android:ems="10" android:hint="确认密码"> </edittext></edittext></relativelayout> |
strings.xml
[代码]java代码：
1 | <string name="preference_change_password_title">更改密码</string><br> <string name="lockpassword_ok_label">确定</string><br> <string name="lockpassword_confirm_passwords_dont_match">旧密码不匹配</string><string name="lockpassword_confirm_passwords_dont_match"></string> |
代码就这些，很简单。需要的话可以直接添加到项目中去。
随时随地看视频
