編輯:關於Android編程
最近一直的工作是手機上的DIY操作,功能很多網上資料不多,將最近遇到的功能分解成模塊 今天介紹的是圖片(我這裡也可以是任意View 常見的還有Edittext需要這樣的功能 指定區域多圖片合成 放大 縮小 鏡像 旋轉) 一一分享,當然做法有很多種,我分享其中嘗試後最簡單的一種有做DIY的同學可以加我一起討論。除了美顏沒有那麼牛B的算法外 基本功能都設計到了
慣例先看效果圖
// 注意做類似這種模板功能時候 方位由後台數據提供,這裡我們用假數據 4個點 或者xy 加區域來做示例
//一開始我們公司用的是透明蓋住 操作圖片 但發現 局限性較大。後來直接限定區域。將操作圖片層級移到模板圖上面 隨意疊加
1. 背景圖上繪制操作區域,(操作區域可以不止一個,比如美圖秀秀的模板)
2. 操作區域內加上 編輯素材圖的容器與編輯區域相同
3. 添加可編輯的view(這裡方便觀看用的ImageView)
4. 合成將你想要的View范圍截屏(也可以去掉你不想要的那部分)
知道這個 可以簡化你自己做圖生成圖片的 省略 很多復雜方法 所以先放出來 後面DIY也是用的最多的方法。
flRoot.setClipChildren(false);//是否限制子View在其范圍內*(注意這個屬性必須放在拖動布局的爺爺布局才能生效)
還有這個方法。使其顯示View的全局哪怕被遮擋。方便用戶在編輯圖片的時候更清晰
1.
View view = 你想要合成的當前顯示的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 那麼整個圖片就局部截屏下來了。就類似局部截屏。當然這個bitmap可以繼續操作。又或者你可以把4個按鈕隱藏掉後 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());/這是你的文件存的路徑 自己定義吧
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(); }
自定義的FrameLayout
ImagesTemplates帶的布局 View view = View.inflate(mContext, R.layout.view_images_templates, null);
addView(view);
簡單形成一個組合控件。
<framelayout android:background="#FFF" android:id="@+id/flRoot" android:layout_height="match_parent" android:layout_width="match_parent" xmlns:android="http://schemas.android.com/apk/res/android"><framelayout android:background="#50654786" android:clipchildren="false" android:id="@+id/flZone" android:layout_height="wrap_content" android:layout_width="wrap_content"> </framelayout> </framelayout>
initBg(30, 90, 800, 1200);//背景起點 長寬 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); } //可多個 ----------------------- initEditZone(30, 30, 600, 800);// 展現編輯區域 虛線 和半透明 可能多個拓展 /** * 通過起點和區域范圍 得到編輯區域 * * @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() { //監聽一次馬上結束 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); //設置虛線效果 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); //顯示編輯區域范圍 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.
當然你可以一個ImageView畫4個bitmap搞定 但是後面我否定了這個方法 重寫了這種比較直觀的4個ImageView 作為按鈕蓋在主圖View方法,中間的View可以替換。也方便理解,簡化了後面的步驟。
R.layout.add_img_item
<framelayout android:id="@+id/fl" android:layout_height="wrap_content" android:layout_width="wrap_content" xmlns:android="http://schemas.android.com/apk/res/android"></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() { //監聽一次馬上結束 if (Build.VERSION.SDK_INT < 16) { flEditImage.getViewTreeObserver().removeGlobalOnLayoutListener(this); } else { flEditImage.getViewTreeObserver().removeOnGlobalLayoutListener(this); } int[] location = new int[2]; flEditImage.getLocationOnScreen(location);//獲取在整個屏幕內的絕對坐標 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在其范圍內*(注意這個屬性必須放在拖動布局的爺爺布局才能生效) } 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, "超出范圍已移除", Toast.LENGTH_SHORT).show(); } if (!isMove) { // Log.i("rex", "i 點擊事件 "); } // centerX = (flEditImage.getLeft() + flEditImage.getWidth()) / 2; // centerY = (flEditImage.getTop() + flEditImage.getHeight()) / 2; } return true; } }); //刪除 ivLeft.setOnClickListener(new OnClickListener() { @Override public void onClick(View view) { flZone.removeView(flEditImage); } }); //鏡像 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)); } }); //旋轉 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)); } }); //縮放 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); //獲取在當前窗口內的絕對坐標 flEditImage.getLocationOnScreen(location);//獲取在整個屏幕內的絕對坐標 float radius = ivBLeft.getWidth();//不精確 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;//此處有微量誤差 return scale; } }); }
/** * 判斷是否超出 * @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);//鏡像垂直翻轉 else matrix.postScale(-1, 1); //鏡像水平翻轉 Bitmap newBitmap = Bitmap.createBitmap(bitmap, 0, 0, w, h, matrix, true); bitmap.recycle(); return newBitmap; }
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