Android仿苹果iphone数字锁屏解锁功能

跟着我一起按步骤来做，保证你一学就会。

步骤如下：

一、先自定义一个键盘布局文件：

在项目res/xml目录下新建一个xml文件，比如number_only.xml

 xml version="1.0" encoding="utf-8"?>
 <Keyboard xmlns:android="http://schemas.android.com/apk/res/android"
     android:horizontalGap="0px"
     android:keyHeight="13%p"
     android:keyWidth="33%p"
     android:verticalGap="0px" >

     <Row>
         <Key
             android:codes="49"
             android:keyLabel="1" />
         <Key
             android:codes="50"
             android:keyLabel="2" />
         <Key
             android:codes="51"
             android:keyLabel="3" />
     Row>
     <Row>
         <Key
             android:codes="52"
             android:keyLabel="4" />
         <Key
             android:codes="53"
             android:keyLabel="5" />
         <Key
             android:codes="54"
             android:keyLabel="6" />
     Row>
     <Row>
         <Key
             android:codes="55"
             android:keyLabel="7" />
         <Key
             android:codes="56"
             android:keyLabel="8" />
         <Key
             android:codes="57"
             android:keyLabel="9" />
     Row>
     <Row>
         <Key
             android:codes="-2"
             android:keyLabel="" />
         <Key
             android:codes="48"
             android:keyLabel="0" />
         <Key
             android:codes="-5"
             android:keyIcon="@drawable/keyboard_delete" />
     Row>

 Keyboard>

二、编写一个键盘事件处理的工具类，如KeyboardUtil.java

 import java.util.ArrayList;

 import android.app.Activity;
 import android.inputmethodservice.Keyboard;
 import android.inputmethodservice.KeyboardView;
 import android.inputmethodservice.KeyboardView.OnKeyboardActionListener;
 import android.view.View;
 import android.widget.EditText;

 public class KeyboardUtil {
     private Activity myActivity;
     private KeyboardView keyboardView;
     private Keyboard kb_num_only;

     private ArrayList listEd;
     private String thisPwdText = "";

     public KeyboardUtil(Activity activity) {
         this.myActivity = activity;
         kb_num_only = new Keyboard(activity, R.xml.number_only);
         keyboardView = (KeyboardView) myActivity
                 .findViewById(R.id.keyboard_view);
         keyboardView.setKeyboard(kb_num_only);
         keyboardView.setEnabled(true);
         keyboardView.setPreviewEnabled(true);
         keyboardView.setOnKeyboardActionListener(listener);
     }

     private OnKeyboardActionListener listener = new OnKeyboardActionListener() {
         @Override
         public void swipeUp() {
         }

         @Override
         public void swipeRight() {
         }

         @Override
         public void swipeLeft() {
         }

         @Override
         public void swipeDown() {
         }

         @Override
         public void onText(CharSequence text) {
         }

         @Override
         public void onRelease(int primaryCode) {
         }

         @Override
         public void onPress(int primaryCode) {
         }

         @Override
         public void onKey(int primaryCode, int[] keyCodes) {
             if (primaryCode == -2) {
                 return;
             } else if (primaryCode == Keyboard.KEYCODE_DELETE) {// 回退
                 // 删除按钮所做的动作
                 if (thisPwdText != null && thisPwdText.length() >= 1) {
                     thisPwdText = thisPwdText.substring(0,
                             thisPwdText.length() - 1);
                     System.out.println("thisPwdText=" + thisPwdText);
                     int len = thisPwdText.length();
                     if (len <= 3) {
                         listEd.get(len).setText("");
                     }
                 }
             } else {
                 thisPwdText = thisPwdText + (char) primaryCode;
                 System.out.println("thisPwdText=" + thisPwdText);
                 int len = thisPwdText.length();
                 if (len <= 4) {
                     listEd.get(len - 1).setText("*");
                     if (len == 4) {
                         // 返回值，并清理本次记录，自动进入下次
                         listEd.get(4).setText(thisPwdText);
                         thisPwdText = "";
                     }
                 }
             }
         }
     };

     /**
      * 包括四个密码输入框和一个密码保存框(按此顺序即可)
      *
      * @param etList
      */
     public void setListEditText(ArrayList etList) {
         this.listEd = etList;
     }

     // 显示键盘
     public void showKeyboard() {
         int visibility = keyboardView.getVisibility();
         if (visibility == View.GONE || visibility == View.INVISIBLE) {
             keyboardView.setVisibility(View.VISIBLE);
         }
     }

     // 隐藏键盘
     public void hideKeyboard() {
         int visibility = keyboardView.getVisibility();
         if (visibility == View.VISIBLE) {
             keyboardView.setVisibility(View.INVISIBLE);
         }
     }
 }

三、新建一个activity窗口类：如SetLockPwdActivity.java

 import java.util.ArrayList;
 import android.app.Activity;
 import android.content.Intent;
 import android.os.Bundle;
 import android.os.Handler;
 import android.os.Message;
 import android.text.Editable;
 import android.text.InputType;
 import android.text.TextWatcher;
 import android.view.View;
 import android.view.View.OnClickListener;
 import android.widget.EditText;

 public class SetLockPwdActivity extends Activity {
     private View backView;
     private EditText etPwdOne, etPwdTwo, etPwdThree, etPwdFour, etPwdText;
     private KeyboardUtil kbUtil;
     public String strLockPwdOne;
     public String strLockPwdTwo;
     private Handler mHandler;

     @Override
     protected void onCreate(Bundle savedInstanceState) {
         // TODO Auto-generated method stub
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_set_lock_pwd);
         findView();
         setListener();
         initData();
     }

     void findView() {
         etPwdOne = (EditText) findViewById(R.id.etPwdOne_setLockPwd);
         etPwdTwo = (EditText) findViewById(R.id.etPwdTwo_setLockPwd);
         etPwdThree = (EditText) findViewById(R.id.etPwdThree_setLockPwd);
         etPwdFour = (EditText) findViewById(R.id.etPwdFour_setLockPwd);
         etPwdText = (EditText) findViewById(R.id.etPwdText_setLockPwd);
     }

     void setListener() {
         etPwdText.addTextChangedListener(new TextWatcher() {
             @Override
             public void onTextChanged(CharSequence arg0, int arg1, int arg2,
                     int arg3) {
             }

             @Override
             public void beforeTextChanged(CharSequence arg0, int arg1,
                     int arg2, int arg3) {
             }

             @Override
             public void afterTextChanged(Editable arg0) {
                 if (etPwdFour.getText() != null
                         && etPwdFour.getText().toString().length() >= 1) {
                     new Thread(new Runnable() {
                         @Override
                         public void run() {
                             try {
                                 Thread.sleep(100);
                             } catch (Exception e) {
                                 e.printStackTrace();
                             } finally {
                                 Message msg = mHandler.obtainMessage();
                                 msg.what = R.id.doSuccess;
                                 mHandler.sendMessage(msg);
                             }
                         }
                     }).start();
                 }
             }
         });
     }

     void initData() {
         kbUtil = new KeyboardUtil(SetLockPwdActivity.this);
         ArrayList list = new ArrayList();
         list.add(etPwdOne);
         list.add(etPwdTwo);
         list.add(etPwdThree);
         list.add(etPwdFour);
         list.add(etPwdText);
         kbUtil.setListEditText(list);
         etPwdOne.setInputType(InputType.TYPE_NULL);
         etPwdTwo.setInputType(InputType.TYPE_NULL);
         etPwdThree.setInputType(InputType.TYPE_NULL);
         etPwdFour.setInputType(InputType.TYPE_NULL);
         MyHandle();
     }

     void backToActivity() {
         Intent mIntent = new Intent(SetLockPwdActivity.this, MainActivity.class);
         startActivity(mIntent);
     }


     public void MyHandle() {
         mHandler = new Handler() {
             @Override
             public void handleMessage(Message msg) {
                 super.handleMessage(msg);
                 switch (msg.what) {
                 case R.id.doSuccess:
                     if (etPwdFour.getText() != null
                             && etPwdFour.getText().toString().length() >= 1) {
                         if (strLockPwdOne != null
                                 && strLockPwdOne.length() == 4) {
                             String strReapt = etPwdText.getText().toString();
                             if (strReapt.equals(strLockPwdOne)) {
                                 Validate.Toast(SetLockPwdActivity.this,
                                         "解锁密码设置成功");
                                 strLockPwdOne = null;
                             } else {
                                 Validate.Toast(SetLockPwdActivity.this,
                                         "解锁密码设置失败");
                             }
                         } else {
                             strLockPwdOne = etPwdText.getText().toString();
                         }
                         etPwdOne.setText("");
                         etPwdTwo.setText("");
                         etPwdThree.setText("");
                         etPwdFour.setText("");
                     }
                     break;
                 default:
                     break;
                 }
             }
         };
     }

 }

此activity对应的layout文件：

 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:background="@color/black"
     android:orientation="vertical" >



     <LinearLayout
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_gravity="center_horizontal"
         android:layout_marginTop="55dp"
         android:orientation="horizontal" >

         <EditText
             android:id="@+id/etPwdOne_setLockPwd"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:background="@color/white"
             android:cursorVisible="false"
             android:ems="1"
             android:gravity="center"
             android:lines="1"
             android:textSize="31sp" >
         EditText>

         <EditText
             android:id="@+id/etPwdTwo_setLockPwd"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_marginLeft="16dp"
             android:background="@color/white"
             android:cursorVisible="false"
             android:ems="1"
             android:gravity="center"
             android:textSize="31sp" />

         <EditText
             android:id="@+id/etPwdThree_setLockPwd"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_marginLeft="16dp"
             android:background="@color/white"
             android:cursorVisible="false"
             android:ems="1"
             android:gravity="center"
             android:textSize="31sp" />

         <EditText
             android:id="@+id/etPwdFour_setLockPwd"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_marginLeft="16dp"
             android:background="@color/white"
             android:cursorVisible="false"
             android:ems="1"
             android:gravity="center"
             android:textSize="31sp" />

         <EditText
             android:id="@+id/etPwdText_setLockPwd"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:visibility="gone" />
     LinearLayout>

     <LinearLayout
         android:layout_width="match_parent"
         android:layout_height="match_parent"
         android:gravity="center"
         android:orientation="vertical" >

         <android.inputmethodservice.KeyboardView
             android:id="@+id/keyboard_view"
             android:layout_width="fill_parent"
             android:layout_height="wrap_content"
             android:layout_gravity="center"
             android:background="@color/lightblack"
             android:focusable="true"
             android:focusableInTouchMode="true"
             android:keyBackground="@drawable/keyboard_key"
             android:keyTextColor="@color/white" />
     LinearLayout>

 LinearLayout>

四、最后一步，别忘了在AndroidManifest.xml配置文件中声明上面的activity类。

效果如下：