[Android UI]android-lockpattern图案解锁的实现分享

    本文属于学习分享，如有雷同纯属巧合 怎么会有雷同呢？

    本着技术分享，学习互助的原则，我在此分享一款已经开源的android 图案解锁的实现。

项目地址：https://code.google.com/p/android-lockpattern/  （考虑到要翻墙，才写了这个demo）

它也是参考了android自带的图案锁的源码而修改的，可以作为app来调用。

先看看实现效果吧！

    开始说说这个demo的结构吧，首先下载源码，把android-lockpattern作为lib来使用

1.创建demo,先把haibison.android.lockpattern.LockPatternActivity.java拷到我们的项目里，他就是图案的activity，我们可以自己在里面改逻辑；然后配置AndroidManifest.xml,加上如下的配置

 <!-- 为了避免由于屏幕的旋转而导致activity被系统kill掉加上如下设定 -->
        <activity
            android:name="LockPatternActivity"
            android:configChanges="orientation|screenSize|keyboard|keyboardHidden"
            android:screenOrientation="user"
            android:theme="@style/Alp.42447968.Theme.Dark" >
        </activity>

/**
 * demo主界面（习惯）
 * @author jan
 */
public class MainActivity extends Activity implements OnClickListener {
	private static final String TAG = "MainActivity";
	//请求创建一个新的图案
	private static final int REQ_CREATE_PATTERN = 1;
	//比较已有的图案
	private static final int REQ_COMPARE_PATTERN = 2;
	//生成随机的图案（个人感觉没啥用(＃－－)/ .）
	private static final int REQ_VERIFY_PATTERN = 3;
	//对比测试的密文，代表一个pattern
	private String testChars = "101b2a675e9fb9546336d5b9ef70418b594184f4";
	private Button openLockPatternBtn,compareButton,verifyModeButton;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		//lockpattern会使用Sharepreference自动保存密文
		AlpSettings.Security.setAutoSavePattern(this, true);
		//隐身模式：不显示勾画的连接线,默认关闭
		AlpSettings.Display.setStealthMode(this, false);
		//启用自定义的解析方式 默认使用SHA1算法摘要
		//<activity
//	    android:name="com.haibison.android.lockpattern.LockPatternActivity"
//	    	    android:configChanges="keyboard|keyboardHidden|orientation|screenSize"
//	    	    android:screenOrientation="user"
//	    	    android:theme="@style/Alp.42447968.Theme.Dialog.Dark" >
//	    	    <meta-data
//	    	        android:name="encrypterClass"
//	    	        android:value="...full.qualified.name.to.your.LPEncrypter" />
//	    	</activity>
		
//		AlpSettings.Security.setEncrypterClass(this, LPEncrypter.class);
		openLockPatternBtn = (Button) findViewById(R.id.open_button);
		openLockPatternBtn.setOnClickListener(this);
		compareButton = (Button) findViewById(R.id.compare_button);
		compareButton.setOnClickListener(this);
		verifyModeButton = (Button) findViewById(R.id.verify_button);
		verifyModeButton.setOnClickListener(this);
	}

	@Override
	protected void onActivityResult(int requestCode, int resultCode, Intent data) {
		switch (requestCode) {
		case REQ_CREATE_PATTERN:
			if (resultCode == RESULT_OK) {
				char[] pattern = data.getCharArrayExtra(LockPatternActivity.EXTRA_PATTERN);
				StringBuffer buffer = new StringBuffer();
				for(char c:pattern){
					buffer.append(c);
				}
				Log.i(TAG, "result=>"+buffer.toString());
				Toast.makeText(this, "消息摘要："+buffer, Toast.LENGTH_SHORT).show();
				//test:101b2a675e9fb9546336d5b9ef70418b594184f4
			}
			break;
		case REQ_COMPARE_PATTERN:
		        /*
		         * 注意！有四种可能出现情况的返回结果
		         */
		        switch (resultCode) {
		        case RESULT_OK:
		            //用户通过验证
		        	Log.d(TAG, "user passed");
		            break;
		        case RESULT_CANCELED:
		            // 用户取消
		        	Log.d(TAG, "user cancelled");
		            break;
		        case LockPatternActivity.RESULT_FAILED:
		            //用户多次失败
		        	Log.d(TAG, "user failed");
		            break;
		        case LockPatternActivity.RESULT_FORGOT_PATTERN:
		            // The user forgot the pattern and invoked your recovery Activity.
		        	Log.d(TAG, "user forgot");
		            break;
		        }

		        /*
		         * 在任何情况下，EXTRA_RETRY_COUNT都代表着用户尝试的图案的次数
		         */
		        int retryCount = data.getIntExtra(
		                LockPatternActivity.EXTRA_RETRY_COUNT, 0);
		        Log.i(TAG, "用户尝试了"+retryCount+"次数");

			break;
		}
	}

	@Override
	public void onClick(View v) {
		switch (v.getId()) {
		//打开一个新的图案
		case R.id.open_button:
			Intent intent = new Intent(
					LockPatternActivity.ACTION_CREATE_PATTERN, null, this,
					LockPatternActivity.class);
			startActivityForResult(intent, REQ_CREATE_PATTERN);
			break;
		//对指定保存的图案做比较
		case R.id.compare_button:
			char[] savedPattern = testChars.toCharArray();
			Intent compare = new Intent(LockPatternActivity.ACTION_COMPARE_PATTERN, null,
			        this, LockPatternActivity.class);
			compare.putExtra(LockPatternActivity.EXTRA_PATTERN, savedPattern);
			startActivityForResult(compare, REQ_COMPARE_PATTERN);
			break;
		//随机图案
		case R.id.verify_button:
			//设置验证的显示次数，默认是4次
			AlpSettings.Display.setCaptchaWiredDots(this, 9);
			Intent verifyIntent = new Intent(LockPatternActivity.ACTION_VERIFY_CAPTCHA, null,
			        this, LockPatternActivity.class);
			startActivityForResult(verifyIntent, REQ_VERIFY_PATTERN);
			break;
		}
	}
}

/**
 * 可提供自定义的加密码方式 
 */
public class LPEncrypter implements IEncrypter {

	@Override
	public char[] encrypt(Context context, List<Cell> pattern) {
		//这只是一个简单的demo,用了很二的加密方式，参考而已。
		StringBuilder result = new StringBuilder();
		for (Cell cell : pattern)
			result.append(Integer.toString(cell.getId() + 1)).append('-');

		return result.substring(0, result.length() - 1).toCharArray();
	}

	@Override
	public List<Cell> decrypt(Context context, char[] encryptedPattern) {
		List<Cell> result = Lists.newArrayList();
		String[] ids = new String(encryptedPattern).split("[^0-9]");
		for (String id : ids)
			result.add(Cell.of(Integer.parseInt(id) - 1));

		return result;
	}

}