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Android 手势密码锁

一:简介

现在有很多银行类APP、涉及到支付类的APP都集成了指纹、手势等二次验证功能,从而使APP获得更高的安全性。今天我们就来分析一下手势密码锁功能的具体实现。

二:源码

源码Demo获取方法

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三:demo源码分析

网上也不乏有一些手势密码的介绍,但是大多是使用第三方库,今天和大家介绍的是通过继承ViewGroup和View实现的原生手势密码锁。

项目文件

1.逻辑代码类分析

页面逻辑主要通过手势密码容器类(GestureContentView)、手势密码路径绘制类(GestureDrawline)、手势密码图案提示类(LockIndicator)三个类来实现。 核心代码如下:

package demo.gesturepsd.gesturepsd_android.widget;

import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;

import demo.gesturepsd.gesturepsd_android.R;
import demo.gesturepsd.gesturepsd_android.common.AppUtil;
import demo.gesturepsd.gesturepsd_android.entity.GesturePoint;
import demo.gesturepsd.gesturepsd_android.widget.GestureDrawline.GestureCallBack;

import java.util.ArrayList;
import java.util.List;

/**
 * 手势密码容器类
 *
 */
public class GestureContentView extends ViewGroup {

	private int baseNum = 6;

	private int[] screenDispaly;

	/**
	 * 每个点区域的宽度
	 */
	private int blockWidth;
	/**
	 * 声明一个集合用来封装坐标集合
	 */
	private List<GesturePoint> list;
	private Context context;
	private boolean isVerify;
	private GestureDrawline gestureDrawline;

	/**
	 * 包含9个ImageView的容器,初始化
	 * @param context
	 * @param isVerify 是否为校验手势密码
	 * @param passWord 用户传入密码
	 * @param callBack 手势绘制完毕的回调
	 */
	public GestureContentView(Context context, boolean isVerify, String passWord, GestureCallBack callBack) {
		super(context);
		screenDispaly = AppUtil.getScreenDispaly(context);
		blockWidth = screenDispaly[0]/3;
		this.list = new ArrayList<GesturePoint>();
		this.context = context;
		this.isVerify = isVerify;
		// 添加9个图标
		addChild();
		// 初始化一个可以画线的view
		gestureDrawline = new GestureDrawline(context, list, isVerify, passWord, callBack);
	}

	private void addChild(){
		for (int i = 0; i < 9; i++) {
			ImageView image = new ImageView(context);
			image.setBackgroundResource(R.drawable.gesture_node_normal);
			this.addView(image);
			invalidate();
			// 第几行
			int row = i / 3;
			// 第几列
			int col = i % 3;
			// 定义点的每个属性
			int leftX = col*blockWidth+blockWidth/baseNum;
			int topY = row*blockWidth+blockWidth/baseNum;
			int rightX = col*blockWidth+blockWidth-blockWidth/baseNum;
			int bottomY = row*blockWidth+blockWidth-blockWidth/baseNum;
			GesturePoint p = new GesturePoint(leftX, rightX, topY, bottomY, image,i+1);
			this.list.add(p);
		}
	}

	public void setParentView(ViewGroup parent){
		// 得到屏幕的宽度
		int width = screenDispaly[0];
		LayoutParams layoutParams = new LayoutParams(width, width);
		this.setLayoutParams(layoutParams);
		gestureDrawline.setLayoutParams(layoutParams);
		parent.addView(gestureDrawline);
		parent.addView(this);
	}

	@Override
	protected void onLayout(boolean changed, int l, int t, int r, int b) {
		for (int i = 0; i < getChildCount(); i++) {
			//第几行
			int row = i/3;
			//第几列
			int col = i%3;
			View v = getChildAt(i);
			v.layout(col*blockWidth+blockWidth/baseNum, row*blockWidth+blockWidth/baseNum,
					col*blockWidth+blockWidth-blockWidth/baseNum, row*blockWidth+blockWidth-blockWidth/baseNum);
		}
	}

	@Override
	protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
		super.onMeasure(widthMeasureSpec, heightMeasureSpec);
		// 遍历设置每个子view的大小
		for (int i = 0; i < getChildCount(); i++) {
			View v = getChildAt(i);
			v.measure(widthMeasureSpec, heightMeasureSpec);
		}
	}

	/**
	 * 保留路径delayTime时间长
	 * @param delayTime
	 */
	public void clearDrawlineState(long delayTime) {
		gestureDrawline.clearDrawlineState(delayTime);
	}

}
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2.页面交互实现分析

设置手势密码页面(GestureEditActivity)

通过设置手势路径转换成数字密码,并通过SharedPreferences存储起来,代码如下:

package demo.gesturepsd.gesturepsd_android;

import android.app.Activity;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.text.Html;
import android.text.TextUtils;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.widget.FrameLayout;
import android.widget.TextView;
import android.widget.Toast;

import demo.gesturepsd.gesturepsd_android.widget.GestureContentView;
import demo.gesturepsd.gesturepsd_android.widget.GestureDrawline.GestureCallBack;
import demo.gesturepsd.gesturepsd_android.widget.LockIndicator;

/**
 *
 * 手势密码设置界面
 *
 */
public class GestureEditActivity extends Activity implements OnClickListener {
	/** 手机号码*/
	public static final String PARAM_PHONE_NUMBER = "PARAM_PHONE_NUMBER";
	/** 意图 */
	public static final String PARAM_INTENT_CODE = "PARAM_INTENT_CODE";
	/** 首次提示绘制手势密码,可以选择跳过 */
	public static final String PARAM_IS_FIRST_ADVICE = "PARAM_IS_FIRST_ADVICE";

	private static final String fileName = "logintext";//定义保存的文件的名称

	private TextView mTextTitle;
	private TextView mTextCancel;
	private LockIndicator mLockIndicator;
	private TextView mTextTip;
	private FrameLayout mGestureContainer;
	private GestureContentView mGestureContentView;
	private TextView mTextReset;
	private String mParamSetUpcode = null;
	private String mParamPhoneNumber;
	private boolean mIsFirstInput = true;
	private String mFirstPassword = null;
	private String mConfirmPassword = null;
	private int mParamIntentCode;

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_gesture_edit);
		setUpViews();
		setUpListeners();
	}

	private void setUpViews() {
		mTextTitle = (TextView) findViewById(R.id.text_title);
		mTextCancel = (TextView) findViewById(R.id.text_cancel);
		mTextReset = (TextView) findViewById(R.id.text_reset);
		mTextReset.setClickable(false);
		mLockIndicator = (LockIndicator) findViewById(R.id.lock_indicator);
		mTextTip = (TextView) findViewById(R.id.text_tip);
		mGestureContainer = (FrameLayout) findViewById(R.id.gesture_container);
		// 初始化一个显示各个点的viewGroup
		mGestureContentView = new GestureContentView(this, false, "", new GestureCallBack() {
			@Override
			public void onGestureCodeInput(String inputCode) {
				if (!isInputPassValidate(inputCode)) {
					mTextTip.setText(Html.fromHtml("<font color='#c70c1e'>最少链接4个点, 请重新输入</font>"));
					mGestureContentView.clearDrawlineState(0L);
					return;
				}
				if (mIsFirstInput) {
					mFirstPassword = inputCode;
					updateCodeList(inputCode);
					mGestureContentView.clearDrawlineState(0L);
					mTextReset.setClickable(true);
					mTextReset.setText(getString(R.string.reset_gesture_code));
				} else {
					if (inputCode.equals(mFirstPassword)) {
						Toast.makeText(GestureEditActivity.this, "设置成功", Toast.LENGTH_SHORT).show();
						Log.i("charge password", mFirstPassword);

						SharedPreferences share = getSharedPreferences(fileName, MODE_PRIVATE);
						SharedPreferences.Editor editor = share.edit();
						editor.putString("psdtype", mFirstPassword);
						editor.commit();

						mGestureContentView.clearDrawlineState(0L);
						GestureEditActivity.this.finish();
					} else {
						mTextTip.setText(Html.fromHtml("<font color='#c70c1e'>与上一次绘制不一致,请重新绘制</font>"));
						// 左右移动动画
						Animation shakeAnimation = AnimationUtils.loadAnimation(GestureEditActivity.this, R.anim.shake);
						mTextTip.startAnimation(shakeAnimation);
						// 保持绘制的线,1.5秒后清除
						mGestureContentView.clearDrawlineState(1300L);
					}
				}
				mIsFirstInput = false;
			}

			@Override
			public void checkedSuccess() {

			}

			@Override
			public void checkedFail() {

			}
		});
		// 设置手势解锁显示到哪个布局里面
		mGestureContentView.setParentView(mGestureContainer);
		updateCodeList("");
	}

	private void setUpListeners() {
		mTextCancel.setOnClickListener(this);
		mTextReset.setOnClickListener(this);
	}

	private void updateCodeList(String inputCode) {
		// 更新选择的图案
		mLockIndicator.setPath(inputCode);
	}

	@Override
	public void onClick(View v) {
		switch (v.getId()) {
			case R.id.text_cancel:
				this.finish();
				break;
			case R.id.text_reset:
				mIsFirstInput = true;
				updateCodeList("");
				mTextTip.setText(getString(R.string.set_gesture_pattern));
				break;
			default:
				break;
		}
	}

	private boolean isInputPassValidate(String inputPassword) {
		if (TextUtils.isEmpty(inputPassword) || inputPassword.length() < 4) {
			return false;
		}
		return true;
	}

}
复制代码

校验手势密码页面(GestureVerifyActivity)

通过SharedPreferences获取到设置页面存储的密码与校验输入的密码进行对比,校验密码是否正确,源码如下:

package demo.gesturepsd.gesturepsd_android;

import android.app.Activity;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.text.Html;
import android.text.TextUtils;
import android.view.View;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.widget.FrameLayout;
import android.widget.ImageView;
import android.widget.RelativeLayout;
import android.widget.TextView;
import android.widget.Toast;

import demo.gesturepsd.gesturepsd_android.widget.GestureContentView;
import demo.gesturepsd.gesturepsd_android.widget.GestureDrawline.GestureCallBack;

/**
 *
 * 手势绘制/校验界面
 *
 */
public class GestureVerifyActivity extends Activity implements android.view.View.OnClickListener {
	/** 手机号码*/
	public static final String PARAM_PHONE_NUMBER = "PARAM_PHONE_NUMBER";
	/** 意图 */
	public static final String PARAM_INTENT_CODE = "PARAM_INTENT_CODE";

	private static final String fileName = "logintext";//定义保存的文件的名称

	private RelativeLayout mTopLayout;
	private TextView mTextTitle;
	private TextView mTextCancel;
	private ImageView mImgUserLogo;
	private TextView mTextPhoneNumber;
	private TextView mTextTip;
	private FrameLayout mGestureContainer;
	private GestureContentView mGestureContentView;
	private TextView mTextForget;
	private TextView mTextOther;
	private String mParamPhoneNumber;
	private long mExitTime = 0;
	private int mParamIntentCode;

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_gesture_verify);
		ObtainExtraData();
		setUpViews();
		setUpListeners();
	}

	private void ObtainExtraData() {
		mParamPhoneNumber = getIntent().getStringExtra(PARAM_PHONE_NUMBER);
		mParamIntentCode = getIntent().getIntExtra(PARAM_INTENT_CODE, 0);
	}

	private void setUpViews() {
		mTopLayout = (RelativeLayout) findViewById(R.id.top_layout);
		mTextTitle = (TextView) findViewById(R.id.text_title);
		mTextCancel = (TextView) findViewById(R.id.text_cancel);
		mImgUserLogo = (ImageView) findViewById(R.id.user_logo);
		mTextPhoneNumber = (TextView) findViewById(R.id.text_phone_number);
		mTextTip = (TextView) findViewById(R.id.text_tip);
		mGestureContainer = (FrameLayout) findViewById(R.id.gesture_container);
		mTextForget = (TextView) findViewById(R.id.text_forget_gesture);
		mTextOther = (TextView) findViewById(R.id.text_other_account);


		SharedPreferences share = super.getSharedPreferences(fileName,
				MODE_PRIVATE);

		String psdtype = share.getString("psdtype", null);

		// 初始化一个显示各个点的viewGroup
		mGestureContentView = new GestureContentView(this, true, psdtype,
				new GestureCallBack() {

					@Override
					public void onGestureCodeInput(String inputCode) {

					}

					@Override
					public void checkedSuccess() {
						mGestureContentView.clearDrawlineState(0L);
						Toast.makeText(GestureVerifyActivity.this, "密码正确", 1000).show();
						GestureVerifyActivity.this.finish();
					}

					@Override
					public void checkedFail() {
						mGestureContentView.clearDrawlineState(1300L);
						mTextTip.setVisibility(View.VISIBLE);
						mTextTip.setText(Html
								.fromHtml("<font color='#c70c1e'>密码错误</font>"));
						// 左右移动动画
						Animation shakeAnimation = AnimationUtils.loadAnimation(GestureVerifyActivity.this, R.anim.shake);
						mTextTip.startAnimation(shakeAnimation);
					}
				});
		// 设置手势解锁显示到哪个布局里面
		mGestureContentView.setParentView(mGestureContainer);
	}

	private void setUpListeners() {
		mTextCancel.setOnClickListener(this);
		mTextForget.setOnClickListener(this);
		mTextOther.setOnClickListener(this);
	}

	private String getProtectedMobile(String phoneNumber) {
		if (TextUtils.isEmpty(phoneNumber) || phoneNumber.length() < 11) {
			return "";
		}
		StringBuilder builder = new StringBuilder();
		builder.append(phoneNumber.subSequence(0,3));
		builder.append("****");
		builder.append(phoneNumber.subSequence(7,11));
		return builder.toString();
	}



	@Override
	public void onClick(View v) {
		switch (v.getId()) {
			case R.id.text_cancel:
				this.finish();
				break;
			default:
				break;
		}
	}

}
复制代码

主页面(MainActivity)

主页面是设置手势密码和校验手势密码的两个按钮,源码比较简单,不做展示。

四:Demo 截图

设置手势密码

校验手势密码

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