android调用系统相机拍摄多张照片

Android通过调用一次系统相机，拍摄多张照片并返回给activity，其实Android时没有提供这样的api的，但是可以通过其他的方式实现这个功能。

思路：在调用系统相机之前记下时间戳，等拍照后去系统图片媒体库中查询图片创建时间大于时间戳的图片。

调用系统拍照，拍多张：

 intent.setAction(MediaStore.INTENT_ACTION_STILL_IMAGE_CAMERA); activity.startActivityForResult(intent, TAKEONCAMERA);

调用系统拍一张的方法是，还有有点区别的：

Intent intentCamera = new Intent();intentCamera.setAction(MediaStore.ACTION_IMAGE_CAPTURE);intentCamera.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);activity.startActivityForResult(intentCamera, requestCode);

拍照完毕后返回到activity会回调onActivityResult方法，在方法里进行图片的查找：

    /**     * 获取拍摄的照片，在调用takeOnCamera之后返回界面时调用该方法。     */    public static List getTakePhoto(Context context){        Cursor cursor = null;        try {            cursor = context.getContentResolver()                    .query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, PROJECTION,                            null, null,                            MediaStore.Images.Media.DATE_ADDED +  " DESC LIMIT 0,30");            if (cursor != null){                List photoList = new ArrayList<>(cursor.getCount());                cursor.moveToFirst();                while (!cursor.isAfterLast()){                    long createTemp = cursor.getLong(cursor.getColumnIndex(MediaStore.Images.Media.DATE_ADDED));                    if (isAfterStart(startTemp, createTemp)){                        photoList.add(cursor.getString(cursor.getColumnIndex(MediaStore.Images.Media.DATA)));                    }                    cursor.moveToNext();                }                return photoList;            }        }catch (Exception e){            e.printStackTrace();        }finally {            if (cursor != null){                cursor.close();            }        }        return null;    }

完整的代码：

/** * -  相册或拍照选取多张照片工具类 *  * Created by Sunxy on 2018/9/8. */public class GetPhotoUtils {    public static final int TAKEONCAMERA = 1002;    private  static final String[] PROJECTION = {MediaStore.Images.Media._ID,            MediaStore.Images.Media.DATE_ADDED,            MediaStore.Images.Media.DATA};    private static long startTemp = Long.MAX_VALUE;    private static int state = 0;    /**     * 得到手机中所有的照片（async）     */    public static List getAllPhoto(Context context){        Cursor cursor = null;        try {            cursor = context.getContentResolver()                    .query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, PROJECTION,                            null, null,                            MediaStore.Images.Media.DATE_ADDED +  " DESC");            if (cursor != null){                List photoList = new ArrayList<>(cursor.getCount());                cursor.moveToFirst();                while (!cursor.isAfterLast()){                    photoList.add(cursor.getString(cursor.getColumnIndex(MediaStore.Images.Media.DATA)));                    cursor.moveToNext();                }                return photoList;            }        }catch (Exception e){            e.printStackTrace();        }finally {            if (cursor != null){                cursor.close();            }        }        return null;    }    /**     * 调手机相机拍多张照片     */    public static void takeOnCamera(Activity activity) {        //打开相机之前，记录时间1        startTemp = System.currentTimeMillis();        Intent intent = new Intent();        //此处之所以诸多try catch，是因为各大厂商手机不确定哪个方法        try {            intent.setAction(MediaStore.INTENT_ACTION_STILL_IMAGE_CAMERA);            activity.startActivityForResult(intent, TAKEONCAMERA);        } catch (Exception e) {            try {                intent.setAction(MediaStore.ACTION_IMAGE_CAPTURE_SECURE);                activity.startActivityForResult(intent, TAKEONCAMERA);            } catch (Exception e1) {                try {                    intent.setAction(MediaStore.INTENT_ACTION_STILL_IMAGE_CAMERA_SECURE);                    activity.startActivityForResult(intent, TAKEONCAMERA);                } catch (Exception ell) {                    ToastUtils.showToast(activity, "打开摄像机失败，请从相册选择照片");                }            }        }    }    /**     * 获取拍摄的照片，在调用takeOnCamera之后返回界面是调用该方法。     */    public static List getTakePhoto(Context context){        Cursor cursor = null;        try {            cursor = context.getContentResolver()                    .query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, PROJECTION,                            null, null,                            MediaStore.Images.Media.DATE_ADDED +  " DESC LIMIT 0,30");            if (cursor != null){                List photoList = new ArrayList<>(cursor.getCount());                cursor.moveToFirst();                while (!cursor.isAfterLast()){                    long createTemp = cursor.getLong(cursor.getColumnIndex(MediaStore.Images.Media.DATE_ADDED));                    if (isAfterStart(startTemp, createTemp)){                        photoList.add(cursor.getString(cursor.getColumnIndex(MediaStore.Images.Media.DATA)));                    }                    cursor.moveToNext();                }                return photoList;            }        }catch (Exception e){            e.printStackTrace();        }finally {            if (cursor != null){                cursor.close();            }        }        return null;    }    /**     * 判断照片创建时间是不是在开始之后，     * 时间戳可能是10位或者是13位，要先统一位数     *     */    private static boolean isAfterStart(long startTemp, long createTemp){        if (state == 0){            int startTempLength = String.valueOf(startTemp).length();            int createTempLength = String.valueOf(createTemp).length();            if (startTempLength == createTempLength){                state = 1;            }else if(startTempLength == 10 && createTempLength == 13){                state = 2;            }else if(startTempLength == 13 && createTempLength == 10){                state = 3;            }        }        if (state == 2){            startTemp = startTemp * 1000;        }else if(state == 3){            startTemp = startTemp / 1000;        }        return createTemp - startTemp >= 0;    }}

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