Android实现身份证拍摄框

http://blog.csdn.net/lhbtm/article/details/55505668

最近项目需要实现身份证拍照的功能,系统的相机并不能满足需求,故需要自定义相机,先上效果图,使用了Camera+ SurfaceView;

布局文件

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
   >
    <com.example.administrator.camerasurfaceview.CameraSurfaceView
        android:id="@+id/cameraSurfaceView"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

    <com.example.administrator.camerasurfaceview.CameraTopRectView
        android:id="@+id/rectOnCamera"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <Button
            android:layout_alignParentBottom="true"
            android:layout_centerHorizontal="true"
            android:layout_marginBottom="20px"
            android:id="@+id/takePic"
            android:layout_width="80dp"
            android:layout_height="50dp"
            android:background="#88427ac7"
            android:text="拍照"
            android:textColor="#aaa" />
    </RelativeLayout>


</FrameLayout>

MainActivity

package com.example.administrator.camerasurfaceview;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;

public class MainActivity extends AppCompatActivity {

    private Button button;
    private CameraSurfaceView mCameraSurfaceView;
    private RectOnCamera rectOnCamera;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

//        requestWindowFeature(Window.FEATURE_NO_TITLE);
//        // 全屏显示
//        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN);
        setContentView(R.layout.activity_main);

        mCameraSurfaceView = (CameraSurfaceView) findViewById(R.id.cameraSurfaceView);
        button = (Button) findViewById(R.id.takePic);

        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                mCameraSurfaceView.takePicture();
            }
        });
    }


//    public void autoFocus() {
//        mCameraSurfaceView.setAutoFocus();
//    }
}

自定义相机类

package com.example.administrator.camerasurfaceview;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Matrix;
import android.hardware.Camera;
import android.os.Environment;
import android.util.AttributeSet;
import android.util.DisplayMetrics;
import android.util.Log;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.WindowManager;
import android.widget.FrameLayout;
import android.widget.Toast;

import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.List;

/**
 * Created by Administrator on 2017/2/15 0015.//自定义相机
 */
public class CameraSurfaceView extends SurfaceView implements SurfaceHolder.Callback, Camera.AutoFocusCallback {

    private static final String TAG = "CameraSurfaceView";

    private Context mContext;
    private SurfaceHolder holder;
    private Camera mCamera;

    private int mScreenWidth;
    private int mScreenHeight;
    private CameraTopRectView topView;

    public CameraSurfaceView(Context context) {
        this(context, null);
    }

    public CameraSurfaceView(Context context, AttributeSet attrs) {
        this(context, attrs, 0);
    }

    public CameraSurfaceView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        mContext = context;
        getScreenMetrix(context);
        topView = new CameraTopRectView(context,attrs);

        initView();


    }

    //拿到手机屏幕大小
    private void getScreenMetrix(Context context) {
        WindowManager WM = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
        DisplayMetrics outMetrics = new DisplayMetrics();
        WM.getDefaultDisplay().getMetrics(outMetrics);
        mScreenWidth = outMetrics.widthPixels;
        mScreenHeight = outMetrics.heightPixels;

    }

    private void initView() {
        holder = getHolder();//获得surfaceHolder引用
        holder.addCallback(this);
//        holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);//设置类型

    }

    @Override
    public void surfaceCreated(SurfaceHolder holder) {
        Log.i(TAG, "surfaceCreated");
        if (mCamera == null) {
            mCamera = Camera.open();//开启相机
            try {
                mCamera.setPreviewDisplay(holder);//摄像头画面显示在Surface上
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

    }

    @Override
    public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
        Log.i(TAG, "surfaceChanged");

        setCameraParams(mCamera, mScreenWidth, mScreenHeight);
        mCamera.startPreview();
//        mCamera.takePicture(null, null, jpeg);

    }

    @Override
    public void surfaceDestroyed(SurfaceHolder holder) {
        Log.i(TAG, "surfaceDestroyed");
        mCamera.stopPreview();//停止预览
        mCamera.release();//释放相机资源
        mCamera = null;
        holder = null;
    }

    @Override
    public void onAutoFocus(boolean success, Camera Camera) {
        if (success) {
            Log.i(TAG, "onAutoFocus success="+success);
            System.out.println(success);
        }
    }


    private void setCameraParams(Camera camera, int width, int height) {
        Log.i(TAG,"setCameraParams  width="+width+"  height="+height);
        Camera.Parameters parameters = mCamera.getParameters();
        // 获取摄像头支持的PictureSize列表
        List<Camera.Size> pictureSizeList = parameters.getSupportedPictureSizes();
        for (Camera.Size size : pictureSizeList) {
            Log.i(TAG, "pictureSizeList size.width=" + size.width + "  size.height=" + size.height);
        }
        /**从列表中选取合适的分辨率*/
        Camera.Size picSize = getProperSize(pictureSizeList, ((float) height / width));
        if (null == picSize) {
            Log.i(TAG, "null == picSize");
            picSize = parameters.getPictureSize();
        }
        Log.i(TAG, "picSize.width=" + picSize.width + "  picSize.height=" + picSize.height);
        // 根据选出的PictureSize重新设置SurfaceView大小
        float w = picSize.width;
        float h = picSize.height;
        parameters.setPictureSize(picSize.width,picSize.height);
        this.setLayoutParams(new FrameLayout.LayoutParams((int) (height*(h/w)), height));

        // 获取摄像头支持的PreviewSize列表
        List<Camera.Size> previewSizeList = parameters.getSupportedPreviewSizes();

        for (Camera.Size size : previewSizeList) {
            Log.i(TAG, "previewSizeList size.width=" + size.width + "  size.height=" + size.height);
        }
        Camera.Size preSize = getProperSize(previewSizeList, ((float) height) / width);
        if (null != preSize) {
            Log.i(TAG, "preSize.width=" + preSize.width + "  preSize.height=" + preSize.height);
            parameters.setPreviewSize(preSize.width, preSize.height);
        }

        parameters.setJpegQuality(100); // 设置照片质量
        if (parameters.getSupportedFocusModes().contains(android.hardware.Camera.Parameters.FOCUS_MODE_CONTINUOUS_PICTURE)) {
            parameters.setFocusMode(android.hardware.Camera.Parameters.FOCUS_MODE_CONTINUOUS_PICTURE);// 连续对焦模式
        }

        mCamera.cancelAutoFocus();//自动对焦。
        mCamera.setDisplayOrientation(90);// 设置PreviewDisplay的方向，效果就是将捕获的画面旋转多少度显示
        mCamera.setParameters(parameters);

    }

    /**
     * 从列表中选取合适的分辨率
     * 默认w:h = 4:3
     * <p>注意：这里的w对应屏幕的height
     *            h对应屏幕的width<p/>
     */
    private Camera.Size getProperSize(List<Camera.Size> pictureSizeList, float screenRatio) {
        Log.i(TAG, "screenRatio=" + screenRatio);
        Camera.Size result = null;
        for (Camera.Size size : pictureSizeList) {
            float currentRatio = ((float) size.width) / size.height;
            if (currentRatio - screenRatio == 0) {
                result = size;
                break;
            }
        }

        if (null == result) {
            for (Camera.Size size : pictureSizeList) {
                float curRatio = ((float) size.width) / size.height;
                if (curRatio == 4f / 3) {// 默认w:h = 4:3
                    result = size;
                    break;
                }
            }
        }

        return result;
    }


    // 拍照瞬间调用
    private Camera.ShutterCallback shutter = new Camera.ShutterCallback() {
        @Override
        public void onShutter() {
            Log.i(TAG,"shutter");
            System.out.println("执行了吗+1");
        }
    };

    // 获得没有压缩过的图片数据
    private Camera.PictureCallback raw = new Camera.PictureCallback() {

        @Override
        public void onPictureTaken(byte[] data, Camera Camera) {
            Log.i(TAG, "raw");
            System.out.println("执行了吗+2");
        }
    };

    //创建jpeg图片回调数据对象
    private Camera.PictureCallback jpeg = new Camera.PictureCallback() {

        private Bitmap bitmap;

        @Override
        public void onPictureTaken(byte[] data, Camera Camera) {


            topView.draw(new Canvas());

            BufferedOutputStream bos = null;
            Bitmap bm = null;
            if(data != null){




            }

            try {
                // 获得图片
                bm = BitmapFactory.decodeByteArray(data, 0, data.length);

                if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
                    String filePath = "/sdcard/dyk"+System.currentTimeMillis()+".JPEG";//照片保存路径

//                    //图片存储前旋转
                    Matrix m = new Matrix();
                    int height = bm.getHeight();
                    int width = bm.getWidth();
                    m.setRotate(90);
                    //旋转后的图片
                    bitmap = Bitmap.createBitmap(bm, 0, 0, width, height, m, true);


                    System.out.println("执行了吗+3");
                    File file = new File(filePath);
                    if (!file.exists()){
                        file.createNewFile();
                    }
                    bos = new BufferedOutputStream(new FileOutputStream(file));

//                    Bitmap bitmap = BitmapFactory.decodeByteArray(data, 0,
//                            data.length);
                    Bitmap sizeBitmap = Bitmap.createScaledBitmap(bitmap,
                            topView.getViewWidth(), topView.getViewHeight(), true);
                    bm = Bitmap.createBitmap(sizeBitmap, topView.getRectLeft(),
                            topView.getRectTop(),
                            topView.getRectRight() - topView.getRectLeft(),
                            topView.getRectBottom() - topView.getRectTop());// 截取


                    bm.compress(Bitmap.CompressFormat.JPEG, 100, bos);//将图片压缩到流中

                }else{
                    Toast.makeText(mContext,"没有检测到内存卡", Toast.LENGTH_SHORT).show();
                }
            } catch (Exception e) {
                e.printStackTrace();
            } finally {
                try {
                    bos.flush();//输出
                    bos.close();//关闭
                    bm.recycle();// 回收bitmap空间
                    mCamera.stopPreview();// 关闭预览
                    mCamera.startPreview();// 开启预览
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }

        }
    };

    public void takePicture(){
        //设置参数,并拍照
        setCameraParams(mCamera, mScreenWidth, mScreenHeight);
        // 当调用camera.takePiture方法后，camera关闭了预览，这时需要调用startPreview()来重新开启预览
        mCamera.takePicture(null,null, jpeg);
    }

//    public void setAutoFocus(){
//        mCamera.autoFocus(this);
//    }


    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);

    }

}

自定义身份证方框

package com.example.administrator.camerasurfaceview;

import android.app.Activity;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Paint.FontMetricsInt;
import android.graphics.Paint.Style;
import android.graphics.Rect;
import android.util.AttributeSet;
import android.view.View;
import android.view.WindowManager;

//import cn.jiazhengye.panda_home.application.BaseApplication;
//import cn.jiazhengye.panda_home.common.Constant;
//import cn.jiazhengye.panda_home.utils.DisplayUtil;
//import cn.jiazhengye.panda_home.utils.LoggerUtil;

class CameraTopRectView extends View {

    private int panelWidth;
    private int panelHeght;

    private int viewWidth;
    private int viewHeight;

    public int rectWidth;
    public int rectHeght;

    private int rectTop;
    private int rectLeft;
    private int rectRight;
    private int rectBottom;

    private int lineLen;
    private int lineWidht;
    private static final int LINE_WIDTH = 5;
    private static final int TOP_BAR_HEIGHT = 50;
    private static final int BOTTOM_BTN_HEIGHT = 66;

//    private static final int TOP_BAR_HEIGHT = Constant.RECT_VIEW_TOP;
//    private static final int BOTTOM_BTN_HEIGHT = Constant.RECT_VIEW_BOTTOM;

    private static final int LEFT_PADDING = 10;
    private static final int RIGHT_PADDING = 10;
    private static final String TIPS = "请将身份证放入到方框中";

    private Paint linePaint;
    private Paint wordPaint;
    private Rect rect;
    private int baseline;

    public CameraTopRectView(Context context, AttributeSet attrs) {
        super(context, attrs);
        // TODO Auto-generated constructor stub
Activity activity = (Activity) context;

        WindowManager wm = (WindowManager) activity.getSystemService(Context.WINDOW_SERVICE);
        panelWidth = wm.getDefaultDisplay().getWidth();//拿到屏幕的宽
        panelHeght = wm.getDefaultDisplay().getHeight();//拿到屏幕的高

        //高度不需要dp转换px,不然整体相机会向上移动一小节
//        viewHeight = panelHeght - (int) DisplayUtil.dp2px(activity,TOP_BAR_HEIGHT + BOTTOM_BTN_HEIGHT);

        viewHeight = panelHeght;
        //viewHeight,界面的高,viewWidth,界面的宽
        viewWidth = panelWidth;

        /*rectWidth = panelWidth
                - UnitUtils.getInstance(activity).dip2px(
                        LEFT_PADDING + RIGHT_PADDING);*/
rectWidth = panelWidth - (int) DisplayUtil.dp2px(activity,LEFT_PADDING + RIGHT_PADDING);

        rectHeght = (int) (rectWidth * 54 / 85.6);
        // 相对于此view
        rectTop = (viewHeight - rectHeght) / 2;
        rectLeft = (viewWidth - rectWidth) / 2;
        rectBottom = rectTop + rectHeght;
        rectRight = rectLeft + rectWidth;

        lineLen = panelWidth / 8;

        linePaint = new Paint();
        linePaint.setAntiAlias(true);
        linePaint.setColor(Color.rgb(0xdd, 0x42, 0x2f));
        linePaint.setStyle(Style.STROKE);
        linePaint.setStrokeWidth(LINE_WIDTH);// 设置线宽
        linePaint.setAlpha(255);

        wordPaint = new Paint();
        wordPaint.setAntiAlias(true);
        wordPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
        wordPaint.setStrokeWidth(3);
        wordPaint.setTextSize(35);

        rect = new Rect(rectLeft, rectTop - 80, rectRight, rectTop - 10);
        FontMetricsInt fontMetrics = wordPaint.getFontMetricsInt();
        baseline = rect.top + (rect.bottom - rect.top - fontMetrics.bottom + fontMetrics.top) / 2 - fontMetrics.top;
        wordPaint.setTextAlign(Paint.Align.CENTER);
    }

    @Override
    public void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        wordPaint.setColor(Color.TRANSPARENT);
        canvas.drawRect(rect, wordPaint);

        //画蒙层
        wordPaint.setColor(0xa0000000);
        rect = new Rect(0, viewHeight/2+rectHeght/2, viewWidth, viewHeight);
        canvas.drawRect(rect, wordPaint);

        rect = new Rect(0, 0, viewWidth, viewHeight/2-rectHeght/2);
        canvas.drawRect(rect, wordPaint);

        rect = new Rect(0, viewHeight/2-rectHeght/2, (viewWidth-rectWidth)/2, viewHeight/2+rectHeght/2);
        canvas.drawRect(rect, wordPaint);

        rect = new Rect(viewWidth-(viewWidth-rectWidth)/2, viewHeight/2-rectHeght/2, viewWidth, viewHeight/2+rectHeght/2);
        canvas.drawRect(rect, wordPaint);


        //重制rect  并画文字  吧文字置于rect中间
        rect = new Rect(rectLeft, rectTop - 80, rectRight, rectTop - 10);
        wordPaint.setColor(Color.WHITE);
        canvas.drawText(TIPS, rect.centerX(), baseline, wordPaint);
        canvas.drawLine(rectLeft, rectTop, rectLeft + lineLen, rectTop,
                linePaint);
        canvas.drawLine(rectRight - lineLen, rectTop, rectRight, rectTop,
                linePaint);
        canvas.drawLine(rectLeft, rectTop, rectLeft, rectTop + lineLen,
                linePaint);
        canvas.drawLine(rectRight, rectTop, rectRight, rectTop + lineLen,
                linePaint);
        canvas.drawLine(rectLeft, rectBottom, rectLeft + lineLen, rectBottom,
                linePaint);
        canvas.drawLine(rectRight - lineLen, rectBottom, rectRight, rectBottom,
                linePaint);
        canvas.drawLine(rectLeft, rectBottom - lineLen, rectLeft, rectBottom,
                linePaint);
        canvas.drawLine(rectRight, rectBottom - lineLen, rectRight, rectBottom,
                linePaint);
    }

    public int getRectLeft() {
        return rectLeft;
    }

    public int getRectTop() {
        return rectTop;
    }

    public int getRectRight() {
        return rectRight;
    }

    public int getRectBottom() {
        return rectBottom;
    }

    public int getViewWidth() {
        return viewWidth;
    }

    public int getViewHeight() {
        return viewHeight;
    }

}

DisplayUtil工具类

package com.example.administrator.camerasurfaceview;

import android.content.Context;

/**
 * Created by Administrator on 2017/2/16 0016.
 */
public class DisplayUtil {
    /**
     * 将px装换成dp，保证尺寸不变
     * @param context
     * @param pxValue
     * @return
     */
    public static int px2dp(Context context, float pxValue){
        float density = context.getResources().getDisplayMetrics().density;//得到设备的密度
        return (int) (pxValue/density+0.5f);
    }
    public static int dp2px(Context context, float dpValue){
        float density = context.getResources().getDisplayMetrics().density;
        return (int) (dpValue*density+0.5f);
    }
    public static int px2sp(Context context, float pxValue){
        float scaleDensity = context.getResources().getDisplayMetrics().scaledDensity;//缩放密度
        return (int) (pxValue/scaleDensity+0.5f);
    }
    public static int sp2px(Context context, float spValue) {
        float scaleDensity = context.getResources().getDisplayMetrics().scaledDensity;
        return (int) (spValue*scaleDensity+0.5f);
    }
}