1 DrawerLayout界面點擊事件穿透問題,即點擊Drawerlayout上面的區域,會發現該位置DrawerLayout覆蓋掉的區域的控件可以被點擊 解決方案如下:
//這裏設置clickable(true) 必須動態設置 靜態設置沒有效果
//解決問題 側滑菜單出來的時候 點擊菜單上的區域會有點擊穿透問題
mDrawerLayout.setDrawerListener(new DrawerLayout.DrawerListener() {
@Override
public void onDrawerSlide(View drawerView, float slideOffset) {
}
@Override
public void onDrawerOpened(View drawerView) {
drawerView.setClickable(true);
}
@Override
public void onDrawerClosed(View drawerView) {
}
@Override
public void onDrawerStateChanged(int newState) {
}
});
- 處理DrawerLayout全屏滑動(默認不會全屏滑動)、然後屏蔽掉長按會彈抽屜的方式
/**
* 向右邊滑
* 處理DrawerLayout全屏滑動(默認不會全屏滑動)、然後屏蔽掉長按會彈抽屜的方式
* @param displayWidthPercentage 1.0表示全屏可滑動 0.5只有右半部分可滑屏 0表示沒有滑動事件
*/
fun setDrawerRightEdgeSize(
activity: Activity,
drawerLayout: DrawerLayout,
displayWidthPercentage: Float
) {
if (activity == null || drawerLayout == null) return
try {
// 找到 ViewDragHelper 並設置 Accessible 爲true
val leftDraggerField: Field =
drawerLayout.javaClass.getDeclaredField("mLeftDragger") //Right
// true表示可全屏滑動
leftDraggerField.isAccessible = true
val leftDragger: ViewDragHelper = leftDraggerField[drawerLayout] as ViewDragHelper
// 找到 edgeSizeField 並設置 Accessible 爲true
val edgeSizeField: Field = leftDragger.javaClass.getDeclaredField("mEdgeSize")
// true表示可全屏滑動
edgeSizeField.isAccessible = true
val edgeSize = edgeSizeField.getInt(leftDragger)
// 設置新的邊緣大小
val displaySize = Point()
activity.windowManager.defaultDisplay.getSize(displaySize)
edgeSizeField.setInt(
leftDragger, Math.max(
edgeSize, (displaySize.x *
displayWidthPercentage).toInt()
)
)
//獲取 Layout 的 ViewDragCallBack 實例“mLeftCallback”
//更改其屬性 mPeekRunnable
val leftCallbackField: Field =
drawerLayout.javaClass.getDeclaredField("mLeftCallback")
// true 表示不可長按彈窗
leftCallbackField.isAccessible = true
//因爲無法直接訪問私有內部類,所以該私有內部類實現的接口非常重要,通過多態的方式獲取實例
val leftCallback: ViewDragHelper.Callback =
leftCallbackField[drawerLayout] as ViewDragHelper.Callback
val peekRunnableField: Field = leftCallback.javaClass.getDeclaredField("mPeekRunnable")
// true 表示不可長按彈窗
peekRunnableField.isAccessible = true
peekRunnableField[leftCallback] = Runnable {}
} catch (e: NoSuchFieldException) {
} catch (e: IllegalArgumentException) {
} catch (e: IllegalAccessException) {
}
}
- Android中DrawerLayout+ViewPager滑動衝突及類似側滑抽屜內列表數據條目側滑衝突的解決方法
首先,讓我們先來解決 DrawerLayout 和 ViewPager 的側滑事件衝突。當 DrawerLayout 中嵌套 ViewPager 時,側滑默認是執行 DrawerLayout 的側滑事件,因爲 Android 的事件分發是從 外層 ViewGroup 向裏逐級傳遞到 View 的。
所以會先執行 DrawerLayout 的 onTouchEvent 方法:
@Override
public boolean onTouchEvent(MotionEvent ev) {
mLeftDragger.processTouchEvent(ev);
mRightDragger.processTouchEvent(ev);
final int action = ev.getAction(); boolean wantTouchEvents = true;
switch (action & MotionEventCompat.ACTION_MASK) {
case MotionEvent.ACTION_DOWN: {
final float x = ev.getX();
final float y = ev.getY();
mInitialMotionX = x;
mInitialMotionY = y;
mDisallowInterceptRequested = false;
mChildrenCanceledTouch = false;
break;
}
case MotionEvent.ACTION_UP: {
final float x = ev.getX();
final float y = ev.getY();
boolean peekingOnly = true;
final View touchedView = mLeftDragger.findTopChildUnder((int) x, (int) y);
if (touchedView != null && isContentView(touchedView)) {
final float dx = x - mInitialMotionX;
final float dy = y - mInitialMotionY;
final int slop = mLeftDragger.getTouchSlop();
if (dx * dx + dy * dy < slop * slop) {
// Taps close a dimmed open drawer but only if it isn't locked open.
final View openDrawer = findOpenDrawer();
if (openDrawer != null) {
peekingOnly = getDrawerLockMode(openDrawer) == LOCK_MODE_LOCKED_OPEN;
}
}
}
closeDrawers(peekingOnly);
mDisallowInterceptRequested = false;
break;
}
case MotionEvent.ACTION_CANCEL: {
closeDrawers(true);
mDisallowInterceptRequested = false;
mChildrenCanceledTouch = false; break;
}
}
return wantTouchEvents;
}
可以看到在最後始終返回 wantTouchEvents,也就是返回 true,意味着點擊事件在 DrawerLayout 就被消費掉了,無法傳到 ViewPager。
所以,我們像下面這樣,監聽當 Drawer 打開時,將 DrawerLayout 設置爲 LOCK_MODE_LOCKED_OPEN,這樣在 Drawer 被打開時,就能夠觸發 ViewPager 的滑動事件了。
mDrawerLayout.addDrawerListener(new DrawerLayout.DrawerListener() {
@Override
public void onDrawerSlide(View drawerView, float slideOffset) {
}
@Override
public void onDrawerOpened(View drawerView) {
mDrawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_OPEN);
}
@Override public void onDrawerClosed(View drawerView) {
mDrawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_UNLOCKED);
}
@Override public void onDrawerStateChanged(int newState) {
}
});
但是,當側邊欄的 ViewPager 滑動到最後一頁,再向左滑動時,我們會希望能夠自然的關閉 Drawer。這就需要我們監聽 ViewPager 的 PageChange 事件,當滑動到最後一頁時,將 DrawerLayout 的 LockMode 設置回 LOCK_MODE_UNLOCKED。
然後讓 MainActivity 實現這個:
@Override
public void onPageSelected(boolean isLast) {
if (isLast) {
mDrawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_UNLOCKED);
} else if (mDrawerLayout.getDrawerLockMode(GravityCompat.START) == DrawerLayout.LOCK_MODE_UNLOCKED) {
mDrawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_OPEN);
}
}