ClipViewLayout.java
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package com.share.mvpsdk.widgets.headclip;
/**
* Created by Horrarndoo on 2017/9/25.
* <p>
*/
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Matrix;
import android.graphics.PointF;
import android.graphics.Rect;
import android.graphics.RectF;
import android.graphics.drawable.Drawable;
import android.media.ExifInterface;
import android.net.Uri;
import android.text.TextUtils;
import android.util.AttributeSet;
import android.util.TypedValue;
import android.view.MotionEvent;
import android.view.ViewTreeObserver;
import android.widget.ImageView;
import android.widget.RelativeLayout;
import com.share.mvpsdk.R;
import com.share.mvpsdk.utils.LogUtils;
import java.io.IOException;
import static com.share.mvpsdk.utils.FileUtils.getRealFilePathFromUri;
/**
* 头像上传原图裁剪容器
*/
public class ClipViewLayout extends RelativeLayout {
//裁剪原图
private ImageView imageView;
//裁剪框
private ClipView clipView;
//裁剪框水平方向间距,xml布局文件中指定
private float mHorizontalPadding;
//裁剪框垂直方向间距,计算得出
private float mVerticalPadding;
//图片缩放、移动操作矩阵
private Matrix matrix = new Matrix();
//图片原来已经缩放、移动过的操作矩阵
private Matrix savedMatrix = new Matrix();
//动作标志:无
private static final int NONE = 0;
//动作标志:拖动
private static final int DRAG = 1;
//动作标志:缩放
private static final int ZOOM = 2;
//初始化动作标志
private int mode = NONE;
//记录起始坐标
private PointF start = new PointF();
//记录缩放时两指中间点坐标
private PointF mid = new PointF();
private float oldDist = 1f;
//用于存放矩阵的9个值
private final float[] matrixValues = new float[9];
//最小缩放比例
private float minScale;
//最大缩放比例
private float maxScale = 4;
public ClipViewLayout(Context context) {
this(context, null);
}
public ClipViewLayout(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public ClipViewLayout(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
init(context, attrs);
}
//初始化控件自定义的属性
public void init(Context context, AttributeSet attrs) {
TypedArray array = context.obtainStyledAttributes(attrs, R.styleable.ClipViewLayout);
//获取剪切框距离左右的边距, 默认为50dp
mHorizontalPadding = array.getDimensionPixelSize(R.styleable.ClipViewLayout_mHorizontalPadding,
(int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 50, getResources().getDisplayMetrics()));
//获取裁剪框边框宽度,默认1dp
int clipBorderWidth = array.getDimensionPixelSize(R.styleable.ClipViewLayout_clipBorderWidth,
(int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 1, getResources().getDisplayMetrics()));
//裁剪框类型(圆或者矩形)
int clipType = array.getInt(R.styleable.ClipViewLayout_clipType, 1);
//回收
array.recycle();
clipView = new ClipView(context);
//设置裁剪框类型
clipView.setClipType(clipType == 1 ? ClipView.ClipType.CIRCLE : ClipView.ClipType.RECTANGLE);
//设置剪切框边框
clipView.setClipBorderWidth(clipBorderWidth);
//设置剪切框水平间距
clipView.setmHorizontalPadding(mHorizontalPadding);
imageView = new ImageView(context);
//相对布局布局参数
android.view.ViewGroup.LayoutParams lp = new LayoutParams(
android.view.ViewGroup.LayoutParams.MATCH_PARENT,
android.view.ViewGroup.LayoutParams.MATCH_PARENT);
this.addView(imageView, lp);
this.addView(clipView, lp);
}
/**
* 初始化图片
*/
public void setImageSrc(final Uri uri) {
//需要等到imageView绘制完毕再初始化原图
ViewTreeObserver observer = imageView.getViewTreeObserver();
observer.addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
public void onGlobalLayout() {
initSrcPic(uri);
imageView.getViewTreeObserver().removeGlobalOnLayoutListener(this);
}
});
}
/**
* 初始化图片
* step 1: decode 出 720*1280 左右的照片 因为原图可能比较大 直接加载出来会OOM
* step 2: 将图片缩放 移动到imageView 中间
*/
public void initSrcPic(Uri uri) {
if (uri == null) {
return;
}
LogUtils.d("**********clip_view uri******* " + uri);
String path = getRealFilePathFromUri(getContext(), uri);
LogUtils.d("**********clip_view path******* " + path);
if (TextUtils.isEmpty(path)) {
return;
}
//这里decode出720*1280 左右的照片,防止OOM
Bitmap bitmap = decodeSampledBitmap(path, 720, 1280);
if (bitmap == null) {
return;
}
//竖屏拍照的照片,直接使用的话,会旋转90度,下面代码把角度旋转过来
int rotation = getExifOrientation(path); //查询旋转角度
Matrix m = new Matrix();
m.setRotate(rotation);
bitmap = Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth(), bitmap.getHeight(), m, true);
//图片的缩放比
float scale;
if (bitmap.getWidth() >= bitmap.getHeight()) {//宽图
scale = (float) imageView.getWidth() / bitmap.getWidth();
//如果高缩放后小于裁剪区域 则将裁剪区域与高的缩放比作为最终的缩放比
Rect rect = clipView.getClipRect();
//高的最小缩放比
minScale = rect.height() / (float) bitmap.getHeight();
if (scale < minScale) {
scale = minScale;
}
} else {//高图
//高的缩放比
scale = (float) imageView.getHeight() / bitmap.getHeight();
//如果宽缩放后小于裁剪区域 则将裁剪区域与宽的缩放比作为最终的缩放比
Rect rect = clipView.getClipRect();
//宽的最小缩放比
minScale = rect.width() / (float) bitmap.getWidth();
if (scale < minScale) {
scale = minScale;
}
}
// 缩放
matrix.postScale(scale, scale);
// 平移,将缩放后的图片平移到imageview的中心
//imageView的中心x
int midX = imageView.getWidth() / 2;
//imageView的中心y
int midY = imageView.getHeight() / 2;
//bitmap的中心x
int imageMidX = (int) (bitmap.getWidth() * scale / 2);
//bitmap的中心y
int imageMidY = (int) (bitmap.getHeight() * scale / 2);
matrix.postTranslate(midX - imageMidX, midY - imageMidY);
imageView.setScaleType(ImageView.ScaleType.MATRIX);
imageView.setImageMatrix(matrix);
imageView.setImageBitmap(bitmap);
}
/**
* 查询图片旋转角度
*/
public static int getExifOrientation(String filepath) {// YOUR MEDIA PATH AS STRING
int degree = 0;
ExifInterface exif = null;
try {
exif = new ExifInterface(filepath);
} catch (IOException ex) {
ex.printStackTrace();
}
if (exif != null) {
int orientation = exif.getAttributeInt(ExifInterface.TAG_ORIENTATION, -1);
if (orientation != -1) {
switch (orientation) {
case ExifInterface.ORIENTATION_ROTATE_90:
degree = 90;
break;
case ExifInterface.ORIENTATION_ROTATE_180:
degree = 180;
break;
case ExifInterface.ORIENTATION_ROTATE_270:
degree = 270;
break;
}
}
}
return degree;
}
@Override
public boolean onTouchEvent(MotionEvent event) {
switch (event.getAction() & MotionEvent.ACTION_MASK) {
case MotionEvent.ACTION_DOWN:
savedMatrix.set(matrix);
//设置开始点位置
start.set(event.getX(), event.getY());
mode = DRAG;
break;
case MotionEvent.ACTION_POINTER_DOWN:
//开始放下时候两手指间的距离
oldDist = spacing(event);
if (oldDist > 10f) {
savedMatrix.set(matrix);
midPoint(mid, event);
mode = ZOOM;
}
break;
case MotionEvent.ACTION_UP:
break;
case MotionEvent.ACTION_POINTER_UP:
mode = NONE;
break;
case MotionEvent.ACTION_MOVE:
if (mode == DRAG) { //拖动
matrix.set(savedMatrix);
float dx = event.getX() - start.x;
float dy = event.getY() - start.y;
mVerticalPadding = clipView.getClipRect().top;
matrix.postTranslate(dx, dy);
//检查边界
checkBorder();
} else if (mode == ZOOM) { //缩放
//缩放后两手指间的距离
float newDist = spacing(event);
if (newDist > 10f) {
//手势缩放比例
float scale = newDist / oldDist;
if (scale < 1) { //缩小
if (getScale() > minScale) {
matrix.set(savedMatrix);
mVerticalPadding = clipView.getClipRect().top;
matrix.postScale(scale, scale, mid.x, mid.y);
//缩放到最小范围下面去了,则返回到最小范围大小
while (getScale() < minScale) {
//返回到最小范围的放大比例
scale = 1 + 0.01F;
matrix.postScale(scale, scale, mid.x, mid.y);
}
}
//边界检查
checkBorder();
} else { //放大
if (getScale() <= maxScale) {
matrix.set(savedMatrix);
mVerticalPadding = clipView.getClipRect().top;
matrix.postScale(scale, scale, mid.x, mid.y);
}
}
}
}
imageView.setImageMatrix(matrix);
break;
}
return true;
}
/**
* 根据当前图片的Matrix获得图片的范围
*/
private RectF getMatrixRectF(Matrix matrix) {
RectF rect = new RectF();
Drawable d = imageView.getDrawable();
if (null != d) {
rect.set(0, 0, d.getIntrinsicWidth(), d.getIntrinsicHeight());
matrix.mapRect(rect);
}
return rect;
}
/**
* 边界检测
*/
private void checkBorder() {
RectF rect = getMatrixRectF(matrix);
float deltaX = 0;
float deltaY = 0;
int width = imageView.getWidth();
int height = imageView.getHeight();
// 如果宽或高大于屏幕,则控制范围 ; 这里的0.001是因为精度丢失会产生问题,但是误差一般很小,所以我们直接加了一个0.01
if (rect.width() >= width - 2 * mHorizontalPadding) {
if (rect.left > mHorizontalPadding) {
deltaX = -rect.left + mHorizontalPadding;
}
if (rect.right < width - mHorizontalPadding) {
deltaX = width - mHorizontalPadding - rect.right;
}
}
if (rect.height() >= height - 2 * mVerticalPadding) {
if (rect.top > mVerticalPadding) {
deltaY = -rect.top + mVerticalPadding;
}
if (rect.bottom < height - mVerticalPadding) {
deltaY = height - mVerticalPadding - rect.bottom;
}
}
matrix.postTranslate(deltaX, deltaY);
}
/**
* 获得当前的缩放比例
*/
public final float getScale() {
matrix.getValues(matrixValues);
return matrixValues[Matrix.MSCALE_X];
}
/**
* 多点触控时,计算最先放下的两指距离
*/
private float spacing(MotionEvent event) {
float x = event.getX(0) - event.getX(1);
float y = event.getY(0) - event.getY(1);
return (float) Math.sqrt(x * x + y * y);
}
/**
* 多点触控时,计算最先放下的两指中心坐标
*/
private void midPoint(PointF point, MotionEvent event) {
float x = event.getX(0) + event.getX(1);
float y = event.getY(0) + event.getY(1);
point.set(x / 2, y / 2);
}
/**
* 获取剪切图
*/
public Bitmap clip() {
imageView.setDrawingCacheEnabled(true);
imageView.buildDrawingCache();
Rect rect = clipView.getClipRect();
Bitmap cropBitmap = null;
Bitmap zoomedCropBitmap = null;
try {
cropBitmap = Bitmap.createBitmap(imageView.getDrawingCache(), rect.left, rect.top, rect.width(), rect.height());
zoomedCropBitmap = zoomBitmap(cropBitmap, 200, 200);
} catch (Exception e) {
e.printStackTrace();
}
if (cropBitmap != null) {
cropBitmap.recycle();
}
// 释放资源
imageView.destroyDrawingCache();
return zoomedCropBitmap;
}
/**
* 图片等比例压缩
*
* @param filePath
* @param reqWidth 期望的宽
* @param reqHeight 期望的高
* @return
*/
public static Bitmap decodeSampledBitmap(String filePath, int reqWidth,
int reqHeight) {
// First decode with inJustDecodeBounds=true to check dimensions
final BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
options.inPreferredConfig = Bitmap.Config.RGB_565;
//bitmap is null
Bitmap bitmap = BitmapFactory.decodeFile(filePath, options);
// Calculate inSampleSize
options.inSampleSize = calculateInSampleSize(options, reqWidth,
reqHeight);
// Decode bitmap with inSampleSize set
options.inJustDecodeBounds = false;
return BitmapFactory.decodeFile(filePath, options);
}
/**
* 计算InSampleSize
* 宽的压缩比和高的压缩比的较小值 取接近的2的次幂的值
* 比如宽的压缩比是3 高的压缩比是5 取较小值3 而InSampleSize必须是2的次幂,取接近的2的次幂4
*
* @param options
* @param reqWidth
* @param reqHeight
* @return
*/
public static int calculateInSampleSize(BitmapFactory.Options options,
int reqWidth, int reqHeight) {
// Raw height and width of image
final int height = options.outHeight;
final int width = options.outWidth;
int inSampleSize = 1;
if (height > reqHeight || width > reqWidth) {
// Calculate ratios of height and width to requested height and
// width
final int heightRatio = Math.round((float) height
/ (float) reqHeight);
final int widthRatio = Math.round((float) width / (float) reqWidth);
// Choose the smallest ratio as inSampleSize value, this will
// guarantee
// a final image with both dimensions larger than or equal to the
// requested height and width.
int ratio = heightRatio < widthRatio ? heightRatio : widthRatio;
// inSampleSize只能是2的次幂 将ratio就近取2的次幂的值
if (ratio < 3)
inSampleSize = ratio;
else if (ratio < 6.5)
inSampleSize = 4;
else if (ratio < 8)
inSampleSize = 8;
else
inSampleSize = ratio;
}
return inSampleSize;
}
/**
* 图片缩放到指定宽高
* <p/>
* 非等比例压缩,图片会被拉伸
*
* @param bitmap 源位图对象
* @param w 要缩放的宽度
* @param h 要缩放的高度
* @return 新Bitmap对象
*/
public static Bitmap zoomBitmap(Bitmap bitmap, int w, int h) {
int width = bitmap.getWidth();
int height = bitmap.getHeight();
Matrix matrix = new Matrix();
float scaleWidth = ((float) w / width);
float scaleHeight = ((float) h / height);
matrix.postScale(scaleWidth, scaleHeight);
Bitmap newBmp = Bitmap.createBitmap(bitmap, 0, 0, width, height, matrix, false);
return newBmp;
}
}