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>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<EditText> 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<EditText> 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);
}
}
}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<EditText> list = new ArrayList<EditText>();
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;
}
}
};
}
}
<?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>
效果如下：
原文地址：http://blog.csdn.net/wanggsx918/article/details/40860785
