网上找了很多代码，发现便宜又方便的只有这一个了
- 新建BaseActivity
/**
* 滑动关闭页面基类，使用时继承此类并使用BlankTheme主题即可
*/
public abstract class BaseSwipeActivity extends BaseActivity {
private SwipeLayout swipeLayout;
/**
* 是否可以滑动关闭页面
*/
protected boolean swipeEnabled = true;
/**
* 是否可以在页面任意位置右滑关闭页面，如果是false则从左边滑才可以关闭。
*/
protected boolean swipeAnyWhere = false;
public BaseSwipeActivity() {
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
swipeLayout = new SwipeLayout(this);
}
public void setSwipeAnyWhere(boolean swipeAnyWhere) {
this.swipeAnyWhere = swipeAnyWhere;
}
public boolean isSwipeAnyWhere() {
return swipeAnyWhere;
}
public void setSwipeEnabled(boolean swipeEnabled) {
this.swipeEnabled = swipeEnabled;
}
public boolean isSwipeEnabled() {
return swipeEnabled;
}
@Override
protected void onResume() {
super.onResume();
}
@Override
protected void onPostCreate(Bundle savedInstanceState) {
super.onPostCreate(savedInstanceState);
swipeLayout.replaceLayer(this);
}
public static int getScreenWidth(Context context) {
DisplayMetrics metrics = new DisplayMetrics();
WindowManager manager = (WindowManager) context.getSystemService(WINDOW_SERVICE);
manager.getDefaultDisplay().getMetrics(metrics);
return metrics.widthPixels;
}
private boolean swipeFinished = false;
@Override
public void finish() {
if (swipeFinished) {
super.finish();
overridePendingTransition(0, 0);
} else {
swipeLayout.cancelPotentialAnimation();
super.finish();
overridePendingTransition(0, R.anim.slide_out_right);
}
}
class SwipeLayout extends FrameLayout { /*private View backgroundLayer;用来设置滑动时的背景色*/
private Drawable leftShadow;
public SwipeLayout(Context context) {
super(context);
}
public SwipeLayout(Context context, AttributeSet attrs) {
super(context, attrs);
}
public SwipeLayout(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
}
public void replaceLayer(Activity activity) {
leftShadow = activity.getResources().getDrawable(R.drawable.left_shadow);
touchSlop = (int) (touchSlopDP * activity.getResources().getDisplayMetrics().density);
sideWidth = (int) (sideWidthInDP * activity.getResources().getDisplayMetrics().density);
mActivity = activity;
screenWidth = getScreenWidth(activity);
setClickable(true);
final ViewGroup root = (ViewGroup) activity.getWindow().getDecorView();
content = root.getChildAt(0);
ViewGroup.LayoutParams params = content.getLayoutParams();
ViewGroup.LayoutParams params2 = new ViewGroup.LayoutParams(-1, -1);
root.removeView(content);
this.addView(content, params2);
root.addView(this, params);
}
@Override
protected boolean drawChild(@NonNull Canvas canvas, @NonNull View child, long drawingTime) {
boolean result = super.drawChild(canvas, child, drawingTime);
final int shadowWidth = leftShadow.getIntrinsicWidth();
int left = (int) (getContentX()) - shadowWidth;
leftShadow.setBounds(left, child.getTop(), left + shadowWidth, child.getBottom());
leftShadow.draw(canvas);
return result;
}
boolean canSwipe = false;
/**
* 超过了touchslop仍然没有达到没有条件，则忽略以后的动作
*/
boolean ignoreSwipe = false;
View content;
Activity mActivity;
int sideWidthInDP = 16;
int sideWidth = 72;
int screenWidth = 1080;
VelocityTracker tracker;
float downX;
float downY;
float lastX;
float currentX;
float currentY;
int touchSlopDP = 30;
int touchSlop = 60;
@Override
public boolean dispatchTouchEvent(@NonNull MotionEvent ev) {
if (swipeEnabled && !canSwipe && !ignoreSwipe)
if (swipeAnyWhere) switch (ev.getAction()) {
case MotionEvent.ACTION_DOWN:
downX = ev.getX();
downY = ev.getY();
currentX = downX;
currentY = downY;
lastX = downX;
break;
case MotionEvent.ACTION_MOVE:
float dx = ev.getX() - downX;
float dy = ev.getY() - downY;
if (dx * dx + dy * dy > touchSlop * touchSlop)
if (dy == 0f || Math.abs(dx / dy) > 1) {
downX = ev.getX();
downY = ev.getY();
currentX = downX;
currentY = downY;
lastX = downX;
canSwipe = true;
tracker = VelocityTracker.obtain();
return true;
} else ignoreSwipe = true;
break;
}
else if (ev.getAction() == MotionEvent.ACTION_DOWN && ev.getX() < sideWidth) {
canSwipe = true;
tracker = VelocityTracker.obtain();
return true;
}
if (ev.getAction() == MotionEvent.ACTION_UP || ev.getAction() == MotionEvent.ACTION_CANCEL)
ignoreSwipe = false;
return super.dispatchTouchEvent(ev);
}
@Override
public boolean onInterceptTouchEvent(MotionEvent ev) {
return canSwipe || super.onInterceptTouchEvent(ev);
}
boolean hasIgnoreFirstMove;
@Override
public boolean onTouchEvent(@NonNull MotionEvent event) {
if (canSwipe) {
tracker.addMovement(event);
int action = event.getAction();
switch (action) {
case MotionEvent.ACTION_DOWN:
downX = event.getX();
downY = event.getY();
currentX = downX;
currentY = downY;
lastX = downX;
break;
case MotionEvent.ACTION_MOVE:
currentX = event.getX();
currentY = event.getY();
float dx = currentX - lastX;
if (dx != 0f && !hasIgnoreFirstMove) {
hasIgnoreFirstMove = true;
dx = dx / dx;
}
if (getContentX() + dx < 0) setContentX(0);
else setContentX(getContentX() + dx);
lastX = currentX;
break;
case MotionEvent.ACTION_UP:
case MotionEvent.ACTION_CANCEL:
tracker.computeCurrentVelocity(10000);
tracker.computeCurrentVelocity(1000, 20000);
canSwipe = false;
hasIgnoreFirstMove = false;
int mv = screenWidth / 200 * 1000;
if (Math.abs(tracker.getXVelocity()) > mv)
animateFromVelocity(tracker.getXVelocity());
else if (getContentX() > screenWidth / 2) animateFinish(false);
else animateBack(false);
tracker.recycle();
break;
default:
break;
}
}
return super.onTouchEvent(event);
}
ObjectAnimator animator;
public void cancelPotentialAnimation() {
if (animator != null) {
animator.removeAllListeners();
animator.cancel();
}
}
public void setContentX(float x) {
int ix = (int) x;
content.setX(ix);
invalidate();
}
public float getContentX() {
return content.getX();
}
/**
* 弹回，不关闭，因为left是0，所以setX和setTranslationX效果是一样的 @param withVel 使用计算出来的时间
*/
private void animateBack(boolean withVel) {
cancelPotentialAnimation();
animator = ObjectAnimator.ofFloat(this, "contentX", getContentX(), 0);
int tmpDuration = withVel ? ((int) (duration * getContentX() / screenWidth)) : duration;
if (tmpDuration < 100) tmpDuration = 100;
animator.setDuration(tmpDuration);
animator.setInterpolator(new DecelerateInterpolator());
animator.start();
}
private void animateFinish(boolean withVel) {
cancelPotentialAnimation();
animator = ObjectAnimator.ofFloat(this, "contentX", getContentX(), screenWidth);
int tmpDuration = withVel ? ((int) (duration * (screenWidth - getContentX()) / screenWidth)) : duration;
if (tmpDuration < 100) tmpDuration = 100;
animator.setDuration(tmpDuration);
animator.setInterpolator(new DecelerateInterpolator());
animator.addListener(new Animator.AnimatorListener() {
@Override
public void onAnimationStart(Animator animation) {
}
@Override
public void onAnimationRepeat(Animator animation) {
}
@Override
public void onAnimationEnd(Animator animation) {
if (!mActivity.isFinishing()) {
swipeFinished = true;
mActivity.finish();
}
}
@Override
public void onAnimationCancel(Animator animation) {
}
});
animator.start();
}
private final int duration = 200;
private void animateFromVelocity(float v) {
if (v > 0)
if (getContentX() < screenWidth / 2 && v * duration / 1000 + getContentX() < screenWidth / 2)
animateBack(false);
else animateFinish(true);
else if (getContentX() > screenWidth / 2 && v * duration / 1000 + getContentX() > screenWidth / 2)
animateFinish(false);
else animateBack(true);
}
}
}
2继承该类的activity使用BlankTheme主题
<activity android:name=".activities.ViewTest" android:theme="@style/BlankTheme"></activity>
