游戏截图支持缩放
This commit is contained in:
khy
279
app/src/main/java/com/gh/common/view/ZoomSimpleDraweeView.java
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279
app/src/main/java/com/gh/common/view/ZoomSimpleDraweeView.java
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package com.gh.common.view;
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import android.content.Context;
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import android.graphics.Canvas;
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import android.graphics.Matrix;
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import android.graphics.RectF;
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import android.net.Uri;
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import android.util.AttributeSet;
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import android.view.GestureDetector;
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import android.view.MotionEvent;
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import android.view.ScaleGestureDetector;
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import com.facebook.drawee.view.SimpleDraweeView;
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import com.gh.gamecenter.eventbus.EBReuse;
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import de.greenrobot.event.EventBus;
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/**
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* Created by khy on 2016/10/26.
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*/
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public class ZoomSimpleDraweeView extends SimpleDraweeView {
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private ScaleGestureDetector mScaleDetector;
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private GestureDetector mGestureDetector;
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private float mCurrentScale = 1f;
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private Matrix mCurrentMatrix;
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private setOnSingleClickListener mClickListener;
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private float imgagePro = -1; // 图片宽高比
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public ZoomSimpleDraweeView(Context context) {
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super(context);
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init();
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}
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public ZoomSimpleDraweeView(Context context, AttributeSet attrs) {
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super(context, attrs);
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init();
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}
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public ZoomSimpleDraweeView(Context context, AttributeSet attrs, int defStyle) {
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super(context, attrs, defStyle);
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init();
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}
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private void init() {
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mCurrentMatrix = new Matrix();
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ScaleGestureDetector.OnScaleGestureListener scaleListener = new ScaleGestureDetector
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.SimpleOnScaleGestureListener() {
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@Override
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public boolean onScale(ScaleGestureDetector detector) {
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float scaleFactor = detector.getScaleFactor();
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if (mCurrentScale < 4f || detector.getScaleFactor() < 1f){
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mCurrentScale *= scaleFactor;
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mCurrentMatrix.postScale(scaleFactor, scaleFactor, detector.getFocusX(), detector.getFocusY());
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invalidate();
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}
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return true;
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}
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@Override
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public void onScaleEnd(ScaleGestureDetector detector) {
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super.onScaleEnd(detector);
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if (mCurrentScale < 1f) {
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reset();
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}
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checkBorder();
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}
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};
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mScaleDetector = new ScaleGestureDetector(getContext(), scaleListener);
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GestureDetector.SimpleOnGestureListener gestureListener = new GestureDetector.SimpleOnGestureListener() {
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@Override
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public boolean onSingleTapConfirmed(MotionEvent e) {
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if (mClickListener != null) {
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mClickListener.onClick();
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}
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return true;
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}
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@Override
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public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {
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if (mCurrentScale > 1f) {
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mCurrentMatrix.postTranslate(-distanceX, -distanceY);
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invalidate();
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checkBorder();
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}
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return true;
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}
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@Override
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public boolean onDoubleTap(MotionEvent e) {
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final float x = e.getX();
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final float y = e.getY();
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float scaleSize ; //扩大或缩小的倍数
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if (mCurrentScale > 1.5f){ //缩小时直接回到原画大小
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scaleSize = 0.5f;
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ZoomSimpleDraweeView.this.post(new AutoScaleRunnable(mCurrentScale * scaleSize, getWidth() / 2f, getHeight() / 2f, false));
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} else {
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scaleSize = 2.0f;
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ZoomSimpleDraweeView.this.post(new AutoScaleRunnable(mCurrentScale * scaleSize, x, y, true));
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}
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return true;
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}
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@Override
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public boolean onSingleTapUp(MotionEvent e) {
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return super.onSingleTapUp(e);
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}
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};
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mGestureDetector = new GestureDetector(getContext(), gestureListener);
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}
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/**
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* 检查图片边界是否移到view以内
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* 目的是让图片边缘不要移动到view里面
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*/
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private void checkBorder() {
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RectF rectF = getDisplayRect(mCurrentMatrix);
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boolean reset = false;
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float dx = 0;
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float dy = 0;
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if (rectF.left > 0) {
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dx = getLeft() - rectF.left;
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reset = true;
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}
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if (rectF.top > 0) {
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dy = getTop() - rectF.top;
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reset = true;
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}
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if (rectF.right < getRight()) {
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dx = getRight() - rectF.right;
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reset = true;
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}
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if (rectF.bottom < getHeight()) {
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dy = getHeight() - rectF.bottom;
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reset = true;
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}
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if (reset) {
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mCurrentMatrix.postTranslate(dx, dy);
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invalidate();
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}
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if (dy == 0 && reset || mCurrentScale == 1f){
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EventBus.getDefault().post(new EBReuse("isStopMove"));
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} else{
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EventBus.getDefault().post(new EBReuse("isStartove"));
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}
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}
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/**
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* Helper method that maps the supplied Matrix to the current Drawable
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*
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* @param matrix - Matrix to map Drawable against
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* @return RectF - Displayed Rectangle
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*/
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private RectF getDisplayRect(Matrix matrix) {
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// int bottom;
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// if (imgagePro != -1){
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// bottom = (int) (getRight()*imgagePro);
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// } else {
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// bottom = getBottom();
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// }
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RectF rectF = new RectF(getLeft(), getTop(), getRight(), getBottom());
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matrix.mapRect(rectF);
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return rectF;
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}
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@Override
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public void setImageURI(Uri uri) {
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reset();
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super.setImageURI(uri);
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}
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@Override
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protected void onDraw(Canvas canvas) {
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int saveCount = canvas.save();
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canvas.concat(mCurrentMatrix);
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super.onDraw(canvas);
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canvas.restoreToCount(saveCount);
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}
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@Override
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public boolean onTouchEvent(MotionEvent event) {
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mScaleDetector.onTouchEvent(event);
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if (!mScaleDetector.isInProgress()) {
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mGestureDetector.onTouchEvent(event);
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}
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return true;
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}
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/**
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* 重置图片
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*/
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public void reset() {
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mCurrentMatrix.reset();
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mCurrentScale = 1f;
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invalidate();
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EventBus.getDefault().post(new EBReuse("isStopMove"));
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}
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private final float[] matrixValues = new float[9];
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public final float getScale() {
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mCurrentMatrix.getValues(matrixValues);
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return matrixValues[Matrix.MSCALE_X];
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}
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/**
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* 自动缩放的任务
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*/
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private class AutoScaleRunnable implements Runnable {
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static final float BIGGER = 1.07f;
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static final float SMALLER = 0.96f;
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private float mTargetScale;
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private boolean isExp;
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/**
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* 缩放的中心
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*/
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private float x;
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private float y;
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/**
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* @param isExp :判断是否是放大
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*/
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public AutoScaleRunnable(float targetScale, float x, float y, boolean isExp) {
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this.mTargetScale = targetScale;
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this.x = x;
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this.y = y;
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this.isExp = isExp;
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}
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@Override
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public void run() {
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if (isExp){ //放大
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mCurrentMatrix.postScale(BIGGER, BIGGER, x, y);
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invalidate();
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if (mCurrentScale < mTargetScale && mCurrentScale <= 4) {
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ZoomSimpleDraweeView.this.postDelayed(this, 10);
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mCurrentScale = mCurrentScale * BIGGER;
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} else {
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checkBorder();
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mCurrentScale = getScale();
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}
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}else {//缩小
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mCurrentMatrix.postScale(SMALLER, SMALLER, x, y);
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invalidate();
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checkBorder();
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if (getScale() > 1.01) {
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ZoomSimpleDraweeView.this.postDelayed(this, 1);
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mCurrentScale = mCurrentScale * SMALLER;
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} else {
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reset();
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}
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}
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}
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}
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//图片宽高比例
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public void setImagePro (float imgPro){
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this.imgagePro = imgPro;
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}
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public void setOnSingleClickListener(setOnSingleClickListener listener) {
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mClickListener = listener;
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}
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public interface setOnSingleClickListener {
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void onClick();
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}
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}
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