If you want to see more algorithm questions, you can scan the QR code above to follow my WeChat official account " Data Structure and Algorithms ". Up to now, I have updated more than 500 algorithm questions in the official account , some of which have been sorted into pdf documents. , As of now, there are more than 800 pages in total (and will continue to increase), you can reply to the keyword "pdf" in the official account to download.
Camera was originally used to take pictures in Android, which has been basically abandoned, and then Camera2, which is more flexible to use, but a little more complicated, and then CameraX, which is more convenient to use. Let's take a look at the demo effect first
He can use the front or rear camera to take pictures, autofocus, and also can realize ID photos and cut
How to use
Add in the buid.gradle file in the root directory
allprojects {
repositories {
...
maven {
url 'https://jitpack.io' }
}
}
Then add in the buid.gradle of the used module
implementation 'com.github.sdwwld:CameraX:1.1.2'
The usage is very simple, just a few lines of code
new CameraParam.Builder()
.setActivity(this)
.build();
Of course, if you can’t meet your needs, you can also modify more attributes
String cameraPath = Environment.getExternalStorageDirectory().getPath() + File.separator + "DCIM" + File.separator + "Camera";
File cameraFolder = new File(cameraPath);
if (!cameraFolder.exists()) {
cameraFolder.mkdirs();
}
SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyyMMdd_HHmmss");
CameraParam mCameraParam =
new CameraParam.Builder()
.setActivity(this)//！！！参数必须要有
.setFront(false)//是否是前置摄像头，true是前置摄像头，false是后置摄像头
.setShowMask(true)//是否显示裁剪区，如果显示，图片会进行裁剪
.setShowSwitch(true)//是否显示摄像头切换按钮，如果显示，可以点击切换前后摄像头
.setSwitchLeft(Tools.dp2px(this, 40))//摄像头切换按钮到屏幕左边的距离
.setSwitchTop(Tools.dp2px(this, 40))//摄像头切换按钮到屏幕上边的距离
.setSwitchSize(Tools.dp2px(this, 40))//摄像头切换按钮的大小（宽高一样，是正方形的）
.setBackText("返回")//下面返回键显示的文字
.setBackColor(Color.WHITE)//下面返回键的颜色
.setBackSize(16)//下面返回键的尺寸
.setBackLeft(Tools.dp2px(this, 10))//返回键到屏幕左边的距离
.setTakePhotoSize(Tools.dp2px(this, 60))//拍照按钮的大小（还有拍照完之后显示的保存和放弃保存的按钮，这3个按钮的大小是一样的）
.setMaskMarginLeftAndRight(Tools.dp2px(this, 20))//如果显示裁剪框，裁剪框左右两边倒屏幕的距离
.setMaskMarginTop(Tools.dp2px(this, 120))如果显示裁剪框，裁剪框到屏幕上边的距离
.setMaskRatioW(8)//下面一行和当前行表示的是裁剪框的宽高比
.setMaskRatioH(5)
.setResultBottom(Tools.dp2px(this, 60))//拍照按钮到屏幕下边的距离（还有拍照完之后显示的保存和放弃保存的按钮）
.setResultLeftAndRight(Tools.dp2px(this, 60))//拍照完之后显示的保存和放弃保存的按钮到左边和右边的距离
.setSwitchImgId(R.drawable.ic_switch)//切换摄像头的按钮
.setMaskImgId(R.drawable.bg_bankcard)//剪切框
.setSaveImgId(R.mipmap.success)//拍照成功之后的保存按钮
.setCancelImgId(R.mipmap.failed)//拍照成功之后的放弃按钮
.setTakePhotoImgId(R.mipmap.take_button)//拍照按钮
.setPicturePath(cameraFolder.getAbsolutePath() + File.separator + "IMG_" + simpleDateFormat.format(new Date()) + ".jpg")//拍照保存的路径
.setShowFocusTips(true)//点击屏幕聚焦成功的时候是否需要提示
.setFocusFailTips("聚焦失败")//聚焦失败的提示
.setFocusSuccessTips("聚焦成功")//聚焦成功的提示
.setFocusViewTime(3)//聚焦的时间，是秒
.setFocusViewColor(ContextCompat.getColor(this, R.color.blue))//聚焦框的颜色
.setFocusViewSize(Tools.dp2px(this, 60))//聚焦框的大小（正方形的）
.setCornerViewSize(Tools.dp2px(this, 12))//聚焦框的圆角大小
.setFocusViewStrokeSize(Tools.dp2px(this, 2))//聚焦框线条宽度
.setRequestCode(CameraConstant.REQUEST_CODE)//请求码
.build();
//第一个参数是必须要有的，后面的参数不是必须的，如果想获取默认参数可以像下面这样
Log.d("wld______", mCameraParam.getPicturePath());
As for the file acquisition path, you can use the following method
@Override
protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
super.onActivityResult(requestCode, resultCode, data);
//requestCode默认是CameraConstant.REQUEST_CODE ，当然也可以在上面的CameraParam创建的时候
//调用setRequestCode修改
if (requestCode == CameraConstant.REQUEST_CODE && resultCode == RESULT_OK) {
//获取图片路径
String picturePath = data.getStringExtra(CameraConstant.PICTURE_PATH_KEY);
//显示出来
img_picture.setVisibility(View.VISIBLE);
img_picture.setImageBitmap(BitmapFactory.decodeFile(picturePath));
}
}
The specific project demo can be downloaded on github .