Android 侧边滑动关闭Activity的示例代码
0.效果图
1.设置Activity样式属性
<style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar"> <item name="android:windowIsTranslucent">true</item> </style>
2.自定义侧边阴影视图
class SlideBackView extends View { private Paint mBgPaint, mShadowPaint; private RectF mBgRectF, mShadowRectF; private float mRatio; private float mShadowSize; public SlideBackView(Context context) { super(context); mBgPaint = new Paint(); mBgPaint.setAntiAlias(true); mBgPaint.setColor(0xff000000); mShadowPaint = new Paint(); mShadowPaint.setAntiAlias(true); mShadowPaint.setStyle(Paint.Style.FILL); mShadowSize = dp2px(15); } @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { super.onMeasure(widthMeasureSpec, heightMeasureSpec); mBgRectF = new RectF(); mBgRectF.top = 0; mBgRectF.left = 0; mBgRectF.bottom = MeasureSpec.getSize(heightMeasureSpec); mShadowRectF = new RectF(); mShadowRectF.top = 0; mShadowRectF.bottom = MeasureSpec.getSize(heightMeasureSpec); } @Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); int width = getMeasuredWidth(); float right = mRatio * width; mBgRectF.right = right; mBgPaint.setAlpha((int) (128 * (1 - mRatio))); canvas.drawRect(mBgRectF, mBgPaint); mShadowRectF.left = right - mShadowSize; mShadowRectF.right = right; mShadowPaint.setShader(new LinearGradient(mShadowRectF.left, 0, mShadowRectF.right, 0, 0x00000000, 0x26000000, Shader.TileMode.CLAMP)); canvas.drawRect(mShadowRectF, mShadowPaint); } public void setDistance(float ratio) { mRatio = ratio; invalidate(); } private float dp2px(float dpValue) { float density = getResources().getDisplayMetrics().density; return dpValue * density + 0.5F; } }
3.定义可滑动的Activity父类
public class SlideBaseActivity extends AppCompatActivity implements ValueAnimator.AnimatorUpdateListener { private boolean isAnimate, isSlide, isHandle; private float moveNum; private float lastX, lastY; private int lastPointerCount; private float mAnimatedValue; private ValueAnimator mValueAnimator; private SlideBackView mSlideBackView; private float mTouchSlop; private List<ShieldView> shieldViews = new ArrayList<>(); @Override protected void onCreate(@Nullable Bundle savedInstanceState) { getWindow().setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT)); super.onCreate(savedInstanceState); initAnimator(); initSlideBackView(); mTouchSlop = ViewConfiguration.get(this).getScaledTouchSlop(); } @Override public void onAnimationUpdate(ValueAnimator animation) { mAnimatedValue = (float) animation.getAnimatedValue(); moveView(mAnimatedValue); } @Override public boolean dispatchTouchEvent(MotionEvent event) { if (!isAnimate) { float x = event.getRawX(); float y = event.getRawY(); if (event.getPointerCount() != lastPointerCount) { lastPointerCount = event.getPointerCount(); lastX = x; lastY = y; } float offsetX, offsetY; switch (event.getAction()) { case MotionEvent.ACTION_MOVE: offsetX = x - lastX; offsetY = y - lastY; if (!isHandle) { float absX = Math.abs(offsetX); float absY = Math.abs(offsetY); if (absX > mTouchSlop) { if (absX * 0.5f > absY) { isSlide = true; checkSlide((int) x, (int) y); } else { isSlide = false; } isHandle = true; } } else if (isSlide) { moveNum += offsetX; if (moveNum < 0) { moveNum = 0; } moveView(moveNum); lastX = event.getX(); } break; case MotionEvent.ACTION_UP: if (isHandle) { isSlide = false; isHandle = false; isAnimate = true; int width = getWindow().getDecorView().getMeasuredWidth(); if (moveNum < width / 3f) { mValueAnimator.setFloatValues(moveNum, 0); } else { mValueAnimator.setFloatValues(moveNum, width); } mValueAnimator.start(); moveNum = 0; lastPointerCount = 0; } } } return isSlide || super.dispatchTouchEvent(event); } /** * 添加禁用滑动的子布局 */ public void addShieldView(View view) { shieldViews.add(new ShieldView(false, view)); } /** * 添加水平禁用滑动的子布局 */ public void addHorizontalShieldView(View view) { shieldViews.add(new ShieldView(true, view)); } /** * 移除禁用滑动的子布局 */ public void removeShieldView(View view) { for (ShieldView v : shieldViews) { if (v.view != null && v.view.equals(view)) { shieldViews.remove(v); break; } } } /** * 清空禁用滑动的子布局 */ public void clearShieldView() { shieldViews.clear(); } private void initAnimator() { mValueAnimator = new ValueAnimator(); mValueAnimator.setDuration(300); mValueAnimator.addUpdateListener(this); mValueAnimator.addListener(new AnimatorListenerAdapter() { @Override public void onAnimationEnd(Animator animation) { isAnimate = false; if (mAnimatedValue == getWindow().getDecorView().getMeasuredWidth()) { SlideBaseActivity.super.finish(); overridePendingTransition(0, 0); } } }); } private void initSlideBackView() { mSlideBackView = new SlideBackView(this); ViewGroup decorView = (ViewGroup) getWindow().getDecorView(); decorView.addView(mSlideBackView); } private void moveView(float moveX) { ViewGroup decorView = (ViewGroup) getWindow().getDecorView(); mSlideBackView.setDistance(moveX / decorView.getMeasuredWidth()); int count = decorView.getChildCount(); for (int i = 0; i < count; i++) { View view = decorView.getChildAt(i); if (view != mSlideBackView) { view.setX(moveX); } } } private void checkSlide(int x, int y) { for (ShieldView v : shieldViews) { Rect rect = new Rect(); v.view.getGlobalVisibleRect(rect); if (rect.contains(x, y) && (!(lastX < x && !v.view.canScrollHorizontally(-1)) || (!v.isHorizontal))) { isSlide = false; } } } class ShieldView { boolean isHorizontal; View view; public ShieldView(boolean isHorizontal, View view) { this.isHorizontal = isHorizontal; this.view = view; } } }
4.使用
继承SlideBaseActivity
类,可调用addShieldView
或addHorizontalShieldView
方法解决事件冲突。
5.项目源码
https://gitee.com/yugu/slide-demo
总结
到此这篇关于Android 侧边滑动关闭Activity的文章就介绍到这了,更多相关Android 侧边滑动关闭Activity内容请搜索我们以前的文章或继续浏览下面的相关文章希望大家以后多多支持我们!
赞 (0)