android--仿苹果数字解锁功能

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

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：

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：