package hghl.pdf_test.widget;import android.animation.ValueAnimator;import android.content.Context;import android.content.res.Resources;import android.graphics.Bitmap;import android.graphics.Canvas;import android.graphics.Paint;import android.graphics.Rect;import android.graphics.drawable.BitmapDrawable;import android.support.annotation.Nullable;import android.util.AttributeSet;import android.util.Log;import android.view.MotionEvent;import android.view.View;import android.view.animation.AccelerateInterpolator;import hghl.pdf_test.R;/** * Created by hghl on 2017/8/15. */public class MyView extends View { private int mBitWidth = 0, mBitHeight = 0; private Resources mResources; private Paint mBitPaint; private Bitmap mBitmap; private Rect mSrcRect, mDestRect; private int mTotalWidth = 0, mTotalHeight = 0; public MyView(Context context) { super(context); } public MyView(Context context, @Nullable AttributeSet attrs) { super(context, attrs); mResources = getResources(); mBitmap = ((BitmapDrawable) mResources.getDrawable(R.drawable.beautiful_girl)).getBitmap(); mBitWidth = mBitmap.getWidth(); mBitHeight = mBitmap.getHeight(); mBitPaint = new Paint(Paint.ANTI_ALIAS_FLAG); mBitPaint.setFilterBitmap(true); mBitPaint.setDither(true); } @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { super.onMeasure(widthMeasureSpec, heightMeasureSpec); int width = getMySize(100, widthMeasureSpec); int height = getMySize(100, heightMeasureSpec); Log.e("SDVLDSNVKDSVDS", "==width===" + width + "====height=======" + height);// if (width < height) {// height = width;// } else {// width = height;// } setMeasuredDimension(width, height); } /** * mSrcRect 截取图片尺寸大小 * mDestRect 图片存放位置及大小 * @param canvas */ @Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); canvas.drawBitmap(mBitmap, mSrcRect, mDestRect, mBitPaint); } private int getMySize(int defaultSize, int measureSpec) { int mySize = defaultSize; int mode = MeasureSpec.getMode(measureSpec); int size = MeasureSpec.getSize(measureSpec); switch (mode) { case MeasureSpec.UNSPECIFIED: {//如果没有指定大小，就设置为默认大小 Log.e("SLDVNSDFVBDF", "=====UNSPECIFIED========"); mySize = defaultSize; break; } case MeasureSpec.AT_MOST: {//如果测量模式是最大取值为size Log.e("SLDVNSDFVBDF", "=====AT_MOST========"); //我们将大小取最大值,你也可以取其他值 mySize = size; break; } case MeasureSpec.EXACTLY: {//如果是固定的大小，那就不要去改变它 Log.e("SLDVNSDFVBDF", "=====EXACTLY========"); mySize = size; break; } } return mySize; } private int picWidth = 0, picHeight = 0, widthLength = 0, heightLength = 0; @Override protected void onSizeChanged(int w, int h, int oldw, int oldh) { super.onSizeChanged(w, h, oldw, oldh); mTotalWidth = w; mTotalHeight = h; picWidth = Math.round(mTotalWidth * 1 / 3f); picHeight = Math.round(mTotalHeight * 1 / 3f); widthLength = Math.round((mTotalWidth - picWidth) / 2.0f); heightLength = Math.round((mTotalHeight - picHeight) / 2.0f); /** * 原图片需要绘制区域 取 mBitWidth、mBitHeight 表示绘制原图片全部区域, * mBitWidth , mBitHeight/2 表示绘制只绘制图片上半截 （new Rect( 0, 0, mBitWidth , mBitHeight/2)）; * 同理mBitWidth/2 , mBitHeight 表示绘制只绘制图片左边半截半截(new Rect( 0, 0, mBitWidth/2 , mBitHeight)); */ mSrcRect = new Rect( 0, 0, mBitWidth , mBitHeight); mDestRect = new Rect( widthLength, heightLength, (mTotalWidth - picWidth) , (mTotalHeight - picHeight)); //绘制drawable的区域 } /** * 位置移动 * @param x * @param y */ public void changePosition( int x, int y) { int currentLeft = x - pressPointX; int currentTop = y - pressPointY; if (mDestRect == null) { mDestRect = new Rect(currentLeft, currentTop, currentLeft + picWidth, currentTop + picHeight); } mDestRect.left = currentLeft; mDestRect.right = currentLeft + picWidth; mDestRect.top = currentTop; mDestRect.bottom = currentTop + picHeight; } /** * 左右移动 * @param x * @param y * @param b true 为左边界移动， false为 右边界移动 */ public void changeLeft(int x, int y, boolean b) { int currentLeft = x - Math.round(picWidth/2.0f); int currentTop = y - Math.round(picHeight/2.0f); if (mDestRect == null) { mDestRect = new Rect(currentLeft, currentTop, currentLeft + picWidth, currentTop + picHeight); } if (b) { mDestRect.left = x; } else { mDestRect.right = x; } } /** * 上下移动 * @param x * @param y * @param b true上边界移动, false 为下边界移动 */ public void changeTop(int x, int y, boolean b) { int currentLeft = x - Math.round(picWidth/2.0f); int currentTop = y - Math.round(picHeight/2.0f); if (mDestRect == null) { mDestRect = new Rect(currentLeft, currentTop, currentLeft + picWidth, currentTop + picHeight); } if (b) { mDestRect.top = y; } else { mDestRect.bottom = y; } } private boolean isMove = false; private int pressPointX = 0, pressPointY = 0 ; @Override public boolean onTouchEvent(MotionEvent event) { int x = Math.round(event.getX()); int y = Math.round(event.getY()); int percentWidth4 = Math.round(picWidth / 4.0f); int percentHeight4 = Math.round(picHeight / 4.0f); switch (event.getAction()) { case MotionEvent.ACTION_DOWN: isMove = false; pressPointX = x - mDestRect.left; pressPointY = y - mDestRect.top; if (x > mDestRect.left && x < mDestRect.right && y < mDestRect.bottom && y > mDestRect.top) { isMove = true; } break; default: break; } if (!isMove) { if (y < (mDestRect.top + percentHeight4)) { changeTop( x, y, true); //上 } else if ( y > (mDestRect.bottom - percentHeight4)){ changeTop( x, y, false); //下 } isTouchInItem(x, y, percentWidth4); } else{ changePosition( x, y); // 移动位置 } picWidth = mDestRect.right - mDestRect.left; picHeight = mDestRect.bottom - mDestRect.top; postInvalidate();// 重绘 return true; } private void isTouchInItem(int x, int y, int percentWidth4){ if (x < (mDestRect.left + percentWidth4)) { changeLeft( x, y, true); //左 } else if (x > (mDestRect.right - percentWidth4)){ changeLeft( x, y, false); //右 } }}
