Android DIY之路 （一） 指定区域多图片合成 放大 缩小 镜像 旋转 等
最近一直的工作是手机上的DIY操作，功能很多网上资料不多，将最近遇到的功能分解成模块 今天介绍的是图片（我这里也可以是任意View 常见的还有Edittext需要这样的功能 指定区域多图片合成 放大 缩小 镜像 旋转） 一一分享，当然做法有很多种，我分享其中尝试后最简单的一种
有做DIY的同学可以加我一起讨论。除了美颜没有那么牛B的算法外 基本功能都设计到了
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惯例先看效果图
// 注意做类似这种模板功能时候 方位由后台数据提供，这里我们用假数据 4个点 或者xy 加区域来做示例
//一开始我们公司用的是透明盖住 操作图片 但发现 局限性较大。后来直接限定区域。将操作图片层级移到模板图上面 随意叠加
1. 背景图上绘制操作区域，（操作区域可以不止一个，比如美图秀秀的模板）
2. 操作区域内加上 编辑素材图的容器与编辑区域相同
3. 添加可编辑的view（这里方便观看用的ImageView）
4. 合成将你想要的View范围截屏（也可以去掉你不想要的那部分）
合成将你想要的View范围截屏文件
知道这个 可以简化你自己做图生成图片的 省略 很多复杂方法 所以先放出来 后面DIY也是用的最多的方法。
flRoot.setClipChildren(false);//是否限制子View在其范围内*（注意这个属性必须放在拖动布局的爷爷布局才能生效）
还有这个方法。使其显示View的全局哪怕被遮挡。方便用户在编辑图片的时候更清晰
１.
View view ＝ 你想要合成的当前显示的view
Bitmap bitmap = Bitmap.createBitmap(view .getWidth(), view .getHeight(), Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(bitmap);
canvas.drawColor(Color.WHITE);
view .draw(canvas);
如果本例中我是ivTemps 那么整个图片就局部截屏下来了。就类似局部截屏。当然这个ｂｉｔｍａｐ可以继续操作。又或者你可以把４个按钮隐藏掉后 再局部截屏
２.
ｂｉｔｍａｐ存文件
public static String saveBitmap(Context context, Bitmap bitmap) {
File file = null;
try {
file = new File(getCacheDir(), getFileName());／这是你的文件存的路径 自己定义吧
FileOutputStream os = new FileOutputStream(file);
bitmap = small(bitmap,0.5f);
mmmmmm = Bitmap.createBitmap(bitmap).copy(Bitmap.Config.ARGB_8888, true);
bitmap.compress(Bitmap.CompressFormat.PNG, 100, os);
os.flush();
os.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return file.getPath();
}
背景图上绘制操作区域
<com.rex.refreshapp.ImagesTemplates
android:id="@+id/ivTemps"
android:layout_width="match_parent"
android:layout_height="wrap_content"
/>自定义的FrameLayout
ImagesTemplates带的布局 View view = View.inflate(mContext, R.layout.view_images_templates, null);
addView(view);
简单形成一个组合控件。
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/flRoot"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#FFF"
>
<ImageView
android:id="@+id/ivBg"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
<FrameLayout
android:id="@+id/flZone"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#50654786"
android:clipChildren="false"
>
FrameLayout>
FrameLayout>操作区域内加上 编辑素材图的容器与编辑区域相同
initBg(30, 90, 800, 1200);//背景起点 长宽
private void initBg(int x, int y, int width, int height) {
ivBg.setX(x);
ivBg.setY(y);
ivBg.setScaleType(ImageView.ScaleType.CENTER_CROP);
ivBg.setImageResource(R.mipmap.yudi);
ViewGroup.LayoutParams layoutParams = ivBg.getLayoutParams();
layoutParams.width = width;
layoutParams.height = height;
ivBg.setLayoutParams(layoutParams);
}
//可多个
-----------------------
initEditZone(30, 30, 600, 800);// 展现编辑区域 虚线 和半透明 可能多个拓展
/**
* 通过起点和区域范围 得到编辑区域
*
* @param x
* @param y
* @param width
* @param height
*/
private void initEditZone(final int x, final int y, final int width, final int height) {
ViewTreeObserver vto = ivBg.getViewTreeObserver();
vto.addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
@Override
public void onGlobalLayout() {
//监听一次马上结束
if (Build.VERSION.SDK_INT < 16) {
ivBg.getViewTreeObserver().removeGlobalOnLayoutListener(this);
} else {
ivBg.getViewTreeObserver().removeOnGlobalLayoutListener(this);
}
Bitmap bitmap = Bitmap.createBitmap(ivBg.getWidth(), ivBg.getHeight(), Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(bitmap);
canvas.drawColor(Color.WHITE);
ivBg.draw(canvas);
Paint p = new Paint();
p.setStyle(Paint.Style.STROKE);
//设置虚线效果
p.setPathEffect(new DashPathEffect(new float[]{10, 5}, 0));
p.setStrokeWidth(3);
p.setColor(Color.parseColor("#D0104C"));
Path path = new Path();
path.moveTo(x, y);
path.lineTo(x + width, y);
path.lineTo(x + width, y + height);
path.lineTo(x, y + height);
path.close();
canvas.drawPath(path, p);
ivBg.setImageBitmap(bitmap);
//显示编辑区域范围
flZone.setX(x + ivBg.getX());
flZone.setY(y + ivBg.getY());
FrameLayout.LayoutParams layoutParams = (LayoutParams) flZone.getLayoutParams();
layoutParams.width = width;
layoutParams.height = height;
flZone.setLayoutParams(layoutParams);
}
}
);
}
- 1.
添加可编辑的view（这里方便观看用的ImageView）
当然你可以一个ImageView画4个bitmap搞定 但是后面我否定了这个方法 重写了这种比较直观的4个ImageView 作为按钮盖在主图View方法，中间的View可以替换。也方便理解，简化了后面的步骤。
R.layout.add_img_item
<FrameLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/fl"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
>
<ImageView
android:id="@+id/iv"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_margin="15dp"
android:scaleType="centerCrop"/>
<ImageView
android:id="@+id/ivLeft"
android:layout_width="30dp"
android:layout_height="30dp"
android:layout_gravity="top|left"
android:src="@mipmap/r_close"
/>
<ImageView
android:id="@+id/ivRight"
android:layout_width="30dp"
android:layout_height="30dp"
android:layout_gravity="top|right"
android:src="@mipmap/r_rotate"
/>
<ImageView
android:id="@+id/ivBLeft"
android:layout_width="30dp"
android:layout_height="30dp"
android:layout_gravity="bottom|left"
android:src="@mipmap/r_symmetric"
/>
<ImageView
android:id="@+id/ivBRight"
android:layout_width="30dp"
android:layout_height="30dp"
android:layout_gravity="bottom|right"
android:src="@mipmap/r_zoom"
/>
FrameLayout> private void initEditImage() {
final View flEditImage = View.inflate(mContext, R.layout.add_img_item, null);
flZone.addView(flEditImage);
final ImageView iv = (ImageView) flEditImage.findViewById(R.id.iv);
final ImageView ivLeft = (ImageView) flEditImage.findViewById(R.id.ivLeft);
final ImageView ivRight = (ImageView) flEditImage.findViewById(R.id.ivRight);
final ImageView ivBLeft = (ImageView) flEditImage.findViewById(R.id.ivBLeft);
final ImageView ivBRight = (ImageView) flEditImage.findViewById(R.id.ivBRight);
iv.setImageResource(R.mipmap.shaosiming);
flEditImage.setTag(iv);
ViewTreeObserver vto = flEditImage.getViewTreeObserver();
vto.addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
@Override
public void onGlobalLayout() {
//监听一次马上结束
if (Build.VERSION.SDK_INT < 16) {
flEditImage.getViewTreeObserver().removeGlobalOnLayoutListener(this);
} else {
flEditImage.getViewTreeObserver().removeOnGlobalLayoutListener(this);
}
int[] location = new int[2];
flEditImage.getLocationOnScreen(location);//获取在整个屏幕内的绝对坐标
centerX0 = location[0] + flEditImage.getWidth() / 2;
centerY0 = location[1] + flEditImage.getHeight() / 2;
}
}
);
//平移
flEditImage.setOnTouchListener(new OnTouchListener() {
private boolean isMove;
private int downY;
private int downX;
private ImageView iv;
@Override
public boolean onTouch(View view, MotionEvent event) {
FrameLayout flview = (FrameLayout) view;
iv = (ImageView) view.getTag();
if (event.getAction() == MotionEvent.ACTION_DOWN) {
downX = (int) event.getRawX();
downY = (int) event.getRawY();
isMove = false;
}
if (event.getAction() == MotionEvent.ACTION_MOVE) {
isMove = true;
int moveX = (int) event.getRawX();
int moveY = (int) event.getRawY();
// Log.d(TAG,"moveX "+moveX+" moveY "+moveY);
int dx = moveX - downX;
int dy = moveY - downY;
int i1 = dx + (int) ViewHelper.getTranslationX(flview);
int i2 = dy + (int) ViewHelper.getTranslationY(flview);
ViewHelper.setTranslationX(flview, i1);
ViewHelper.setTranslationY(flview, i2);
downX = moveX;
downY = moveY;
Log.i("rex", "ACTION_MOVE");
flRoot.setClipChildren(false);//是否限制子View在其范围内*（注意这个属性必须放在拖动布局的爷爷布局才能生效）
}
if (event.getAction() == MotionEvent.ACTION_UP) {
Log.i("rex", "ACTION_UP");
centerX = centerX0 + flEditImage.getTranslationX();
centerY = centerY0 + flEditImage.getTranslationY();
flRoot.setClipChildren(true);
flRoot.invalidate();
if (CheckIsOut(iv, flview)) {
ViewGroup parent = (ViewGroup) flview.getParent();
parent.removeView(flview);
// flZone.removeView(flview);
Toast.makeText(mContext, "超出范围已移除", Toast.LENGTH_SHORT).show();
}
if (!isMove) {
// Log.i("rex", "i 点击事件 ");
}
// centerX = (flEditImage.getLeft() + flEditImage.getWidth()) / 2;
// centerY = (flEditImage.getTop() + flEditImage.getHeight()) / 2;
}
return true;
}
});
//删除
ivLeft.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View view) {
flZone.removeView(flEditImage);
}
});
//镜像
ivBLeft.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View view) {
Bitmap bitmap = Bitmap.createBitmap(iv.getWidth(), iv.getHeight(), Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(bitmap);
canvas.drawColor(Color.WHITE);
iv.draw(canvas);
iv.setImageBitmap(flip(bitmap, false));
}
});
//旋转
ivRight.setOnTouchListener(new OnTouchListener() {
private float mDownY;
private float mDownX;
//
// float centerX = flEditImage.getWidth() / 2;
// float centerY = flEditImage.getHeight() / 2;
@Override
public boolean onTouch(View view, MotionEvent event) {
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
mDownX = event.getRawX();
mDownY = event.getRawY();
break;
case MotionEvent.ACTION_MOVE:
float moveX = event.getRawX();
float moveY = event.getRawY();
float rotate = flEditImage.getRotation();
float angle = getDegress(moveX, moveY) - getDegress(mDownX, mDownY);
// float angle = getDegress(mDownX, mDownY) - getDegress(moveX, moveY);
Log.d("name", "degress -> " + (angle + rotate));
flEditImage.setRotation((rotate + angle) % 360);
mDownX = moveX;
mDownY = moveY;
break;
case MotionEvent.ACTION_UP:
break;
}
return true;
}
private float getDegress(float newX, float newY) {
float x = newX - centerX;
float y = newY - centerY;
return (float) Math.toDegrees(Math.atan2(y, x));
}
});
//缩放
ivBRight.setOnTouchListener(new OnTouchListener() {
@Override
public boolean onTouch(View view, MotionEvent event) {
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
// mDownX = event.getRawX();
// mDownY = event.getRawY();
break;
case MotionEvent.ACTION_MOVE:
float moveX = event.getRawX();
float moveY = event.getRawY();
float bili = getBili(moveX, moveY);
Log.d("rex", "bili -> " + bili);
flEditImage.setScaleX(bili);
flEditImage.setScaleY(bili);
correct4ButtonSize(1 / bili);
Log.d("rex", " ivBRight.getScaleX(); " + ivBRight.getScaleX());
// mDownX = moveX;
// mDownY = moveY;
break;
case MotionEvent.ACTION_UP:
break;
}
return true;
}
/**
*
* @param bili
*/
private void correct4ButtonSize(float bili) {
ivLeft.setScaleX(bili);
ivLeft.setScaleY(bili);
ivRight.setScaleX(bili);
ivRight.setScaleY(bili);
ivBLeft.setScaleX(bili);
ivBLeft.setScaleY(bili);
ivBRight.setScaleX(bili);
ivBRight.setScaleY(bili);
;
}
private float getBili(float moveX, float moveY) {
int[] location = new int[2];
// flEditImage.getLocationInWindow(location); //获取在当前窗口内的绝对坐标
flEditImage.getLocationOnScreen(location);//获取在整个屏幕内的绝对坐标
float radius = ivBLeft.getWidth();//不精确
float oldLine = (float) Math.sqrt(flEditImage.getWidth() * flEditImage.getWidth() + flEditImage.getHeight() * flEditImage.getHeight());
float newLine = (float) Math.sqrt((moveX - location[0] + radius) * (moveX - location[0] + radius) + (moveY - location[1] + radius) * (moveY - location[1] + radius));
float scale = newLine / oldLine;//此处有微量误差
return scale;
}
});
} /**
* 判断是否超出
* @param iv
* @param fl
* @return
*/
private boolean CheckIsOut(ImageView iv, FrameLayout fl) {
int maxX = flZone.getWidth();
int maxY = flZone.getHeight();
int a = fl.getWidth();
int a2 = (int) fl.getX();
int a3 = iv.getLeft();
int a4 = iv.getRight();
int x1 = (int) (fl.getX() + iv.getLeft());
int x2 = (int) (fl.getX() + fl.getWidth() - iv.getLeft());
int y1 = (int) (fl.getY() + iv.getTop());
int y2 = (int) (fl.getY() + fl.getHeight() - iv.getTop());
if (x1 > maxX || x2 < 0 || y1 > maxY || y2 < 0) {
return true;
}
return false;
}
public static Bitmap flip(Bitmap bitmap, boolean isVer) {
int w = bitmap.getWidth();
int h = bitmap.getHeight();
Matrix matrix = new Matrix();
if (isVer)
matrix.postScale(1, -1);//镜像垂直翻转
else
matrix.postScale(-1, 1); //镜像水平翻转
Bitmap newBitmap = Bitmap.createBitmap(bitmap, 0, 0, w, h, matrix, true);
bitmap.recycle();
return newBitmap;
}