drawerLayout-監聽事件四個方法介紹

1.首先我們看一下它的監聽事件的生命周期

代碼如下

 mDrawerLayout.setDrawerListener(new DrawerListener() {
            @Override
            public void onDrawerStateChanged(int arg0) {
                mHistoryHideButton.startAnimation(myAnimation);
                android.util.Log.e("zhangshuli", "statechange");
            }   

            @Override
            public void onDrawerSlide(View arg0, float arg1) {
                mHistoryHideButton.startAnimation(myAnimationRecover);
                android.util.Log.e("zhangshuli", "slide");

            }   

            @Override
            public void onDrawerOpened(View arg0) {
                myHistoryAnimationSetCount = 0;
                myHistoryItemCount= mHistory.mEntries.size()-1;
                if (mHistoryDisplayList.getCount() == 0) {
                    mHistoryClearButton.setEnabled(false);
                } else {
                    mHistoryClearButton.setEnabled(true);
                }   
                android.util.Log.e("zhangshuli", "open");
            }   

            @Override
            public void onDrawerClosed(View arg0) {
                history_clear_choose.setVisibility(View.GONE);
                android.util.Log.e("zhangshuli", "colse");
            }
        });

 

當我們直接點開，也就是執行

if (!mDrawerLayout.isDrawerVisible(GravityCompat.END)) {
                    mDrawerLayout.openDrawer(GravityCompat.END);
                }  

的時候，打印結果如下

03-21 11:58:57.163 E/zhangshuli(28603): statechange
03-21 11:58:57.171 E/zhangshuli(28603): slide
03-21 11:58:57.204 E/zhangshuli(28603): slide
03-21 11:58:57.238 E/zhangshuli(28603): slide
03-21 11:58:57.262 E/zhangshuli(28603): slide
03-21 11:58:57.290 E/zhangshuli(28603): slide
03-21 11:58:57.317 E/zhangshuli(28603): slide
03-21 11:58:57.341 E/zhangshuli(28603): slide
03-21 11:58:57.366 E/zhangshuli(28603): slide
03-21 11:58:57.393 E/zhangshuli(28603): slide
03-21 11:58:57.420 E/zhangshuli(28603): slide
03-21 11:58:57.445 E/zhangshuli(28603): slide
03-21 11:58:57.470 E/zhangshuli(28603): slide
03-21 11:58:57.496 E/zhangshuli(28603): slide
03-21 11:58:57.519 E/zhangshuli(28603): slide
03-21 11:58:57.545 E/zhangshuli(28603): slide
03-21 11:58:57.590 E/zhangshuli(28603): open
03-21 11:58:57.591 E/zhangshuli(28603): statechange

我們可以看到 

onDrawerStateChanged 在狀態開始改變跟狀態改變完成以后各執行一次

onDrawerOpened 最終打開以后執行

onDrawerSlide 一直在移動的過程中執行

關閉的時候，點擊關閉

03-21 12:05:27.180 E/zhangshuli(28603): statechange
03-21 12:05:27.190 E/zhangshuli(28603): slide
03-21 12:05:27.215 E/zhangshuli(28603): slide
03-21 12:05:27.246 E/zhangshuli(28603): slide
03-21 12:05:27.270 E/zhangshuli(28603): slide
03-21 12:05:27.295 E/zhangshuli(28603): slide
03-21 12:05:27.319 E/zhangshuli(28603): slide
03-21 12:05:27.349 E/zhangshuli(28603): slide
03-21 12:05:27.378 E/zhangshuli(28603): slide
03-21 12:05:27.412 E/zhangshuli(28603): slide
03-21 12:05:27.440 E/zhangshuli(28603): slide
03-21 12:05:27.463 E/zhangshuli(28603): slide
03-21 12:05:27.485 E/zhangshuli(28603): slide
03-21 12:05:27.506 E/zhangshuli(28603): slide
03-21 12:05:27.527 E/zhangshuli(28603): slide
03-21 12:05:27.561 E/zhangshuli(28603): slide
03-21 12:05:27.601 E/zhangshuli(28603): colse
03-21 12:05:27.601 E/zhangshuli(28603): statechange

跟上面唯一的區別也就是

徹底關閉的時候，執行

 

onDrawerClosed

 

當我們是滑動打開的時候

 

03-21 12:09:20.367 E/zhangshuli(28603): statechange
03-21 12:09:20.375 E/zhangshuli(28603): slide
03-21 12:09:20.395 E/zhangshuli(28603): statechange
03-21 12:09:20.439 E/zhangshuli(28603): slide
03-21 12:09:20.470 E/zhangshuli(28603): slide
03-21 12:09:20.500 E/zhangshuli(28603): slide
03-21 12:09:20.524 E/zhangshuli(28603): slide
03-21 12:09:20.548 E/zhangshuli(28603): slide
03-21 12:09:20.572 E/zhangshuli(28603): slide
03-21 12:09:20.599 E/zhangshuli(28603): slide
03-21 12:09:20.621 E/zhangshuli(28603): slide
03-21 12:09:20.643 E/zhangshuli(28603): slide
03-21 12:09:20.666 E/zhangshuli(28603): slide
03-21 12:09:20.689 E/zhangshuli(28603): slide
03-21 12:09:20.713 E/zhangshuli(28603): slide
03-21 12:09:20.736 E/zhangshuli(28603): slide
03-21 12:09:20.760 E/zhangshuli(28603): slide
03-21 12:09:20.785 E/zhangshuli(28603): slide
03-21 12:09:20.810 E/zhangshuli(28603): slide
03-21 12:09:20.834 E/zhangshuli(28603): slide
03-21 12:09:20.859 E/zhangshuli(28603): slide
03-21 12:09:20.882 E/zhangshuli(28603): slide
03-21 12:09:20.906 E/zhangshuli(28603): slide
03-21 12:09:20.931 E/zhangshuli(28603): slide
03-21 12:09:20.962 E/zhangshuli(28603): slide
03-21 12:09:20.994 E/zhangshuli(28603): slide
03-21 12:09:21.019 E/zhangshuli(28603): slide
03-21 12:09:21.045 E/zhangshuli(28603): slide
03-21 12:09:21.070 E/zhangshuli(28603): slide
03-21 12:09:21.094 E/zhangshuli(28603): slide
03-21 12:09:21.118 E/zhangshuli(28603): slide
03-21 12:09:21.143 E/zhangshuli(28603): slide
03-21 12:09:21.168 E/zhangshuli(28603): slide
03-21 12:09:21.193 E/zhangshuli(28603): slide
03-21 12:09:21.218 E/zhangshuli(28603): slide
03-21 12:09:21.241 E/zhangshuli(28603): slide
03-21 12:09:21.266 E/zhangshuli(28603): slide
03-21 12:09:21.291 E/zhangshuli(28603): slide
03-21 12:09:21.318 E/zhangshuli(28603): slide
03-21 12:09:21.343 E/zhangshuli(28603): slide
03-21 12:09:21.367 E/zhangshuli(28603): slide
03-21 12:09:21.392 E/zhangshuli(28603): slide
03-21 12:09:21.417 E/zhangshuli(28603): slide
03-21 12:09:21.442 E/zhangshuli(28603): slide
03-21 12:09:21.469 E/zhangshuli(28603): slide
03-21 12:09:21.494 E/zhangshuli(28603): slide
03-21 12:09:21.519 E/zhangshuli(28603): slide
03-21 12:09:21.544 E/zhangshuli(28603): slide
03-21 12:09:21.569 E/zhangshuli(28603): slide
03-21 12:09:21.597 E/zhangshuli(28603): slide
03-21 12:09:21.623 E/zhangshuli(28603): slide
03-21 12:09:21.649 E/zhangshuli(28603): slide
03-21 12:09:21.674 E/zhangshuli(28603): slide
03-21 12:09:21.698 E/zhangshuli(28603): slide
03-21 12:09:21.724 E/zhangshuli(28603): slide
03-21 12:09:21.750 E/zhangshuli(28603): slide
03-21 12:09:21.776 E/zhangshuli(28603): slide
03-21 12:09:21.801 E/zhangshuli(28603): slide
03-21 12:09:21.832 E/zhangshuli(28603): slide
03-21 12:09:21.858 E/zhangshuli(28603): slide
03-21 12:09:21.882 E/zhangshuli(28603): slide
03-21 12:09:21.906 E/zhangshuli(28603): slide
03-21 12:09:21.930 E/zhangshuli(28603): slide
03-21 12:09:21.955 E/zhangshuli(28603): slide
03-21 12:09:21.980 E/zhangshuli(28603): slide
03-21 12:09:22.007 E/zhangshuli(28603): slide
03-21 12:09:22.035 E/zhangshuli(28603): slide
03-21 12:09:22.062 E/zhangshuli(28603): slide
03-21 12:09:22.262 E/zhangshuli(28603): open
03-21 12:09:22.262 E/zhangshuli(28603): statechange

 

其實跟我們直接點開沒太大區別，就是

onDrawerSlide 一直在執行。所以，這個方法應該可以得到你的移動坐標

滑動關閉的時候

03-21 12:11:38.056 E/zhangshuli(28603): statechange
03-21 12:11:38.073 E/zhangshuli(28603): slide
03-21 12:11:38.100 E/zhangshuli(28603): slide
03-21 12:11:38.130 E/zhangshuli(28603): slide
03-21 12:11:38.161 E/zhangshuli(28603): slide
03-21 12:11:38.193 E/zhangshuli(28603): slide
03-21 12:11:38.222 E/zhangshuli(28603): slide
03-21 12:11:38.250 E/zhangshuli(28603): slide
03-21 12:11:38.275 E/zhangshuli(28603): slide
03-21 12:11:38.298 E/zhangshuli(28603): slide
03-21 12:11:38.322 E/zhangshuli(28603): slide
03-21 12:11:38.347 E/zhangshuli(28603): slide
03-21 12:11:38.371 E/zhangshuli(28603): slide
03-21 12:11:38.402 E/zhangshuli(28603): slide
03-21 12:11:38.429 E/zhangshuli(28603): slide
03-21 12:11:38.457 E/zhangshuli(28603): slide
03-21 12:11:38.483 E/zhangshuli(28603): slide
03-21 12:11:38.508 E/zhangshuli(28603): slide
03-21 12:11:38.534 E/zhangshuli(28603): slide
03-21 12:11:38.559 E/zhangshuli(28603): slide
03-21 12:11:38.582 E/zhangshuli(28603): slide
03-21 12:11:38.606 E/zhangshuli(28603): slide
03-21 12:11:38.631 E/zhangshuli(28603): slide
03-21 12:11:38.657 E/zhangshuli(28603): slide
03-21 12:11:38.688 E/zhangshuli(28603): slide
03-21 12:11:38.714 E/zhangshuli(28603): slide
03-21 12:11:38.741 E/zhangshuli(28603): slide
03-21 12:11:38.767 E/zhangshuli(28603): slide
03-21 12:11:38.796 E/zhangshuli(28603): slide
03-21 12:11:38.823 E/zhangshuli(28603): slide
03-21 12:11:38.849 E/zhangshuli(28603): slide
03-21 12:11:38.876 E/zhangshuli(28603): slide
03-21 12:11:38.903 E/zhangshuli(28603): slide
03-21 12:11:38.930 E/zhangshuli(28603): slide
03-21 12:11:38.959 E/zhangshuli(28603): slide
03-21 12:11:38.986 E/zhangshuli(28603): slide
03-21 12:11:39.009 E/zhangshuli(28603): slide
03-21 12:11:39.032 E/zhangshuli(28603): slide
03-21 12:11:39.066 E/zhangshuli(28603): slide
03-21 12:11:39.135 E/zhangshuli(28603): slide
03-21 12:11:39.160 E/zhangshuli(28603): slide
03-21 12:11:39.184 E/zhangshuli(28603): slide
03-21 12:11:39.212 E/zhangshuli(28603): slide
03-21 12:11:39.239 E/zhangshuli(28603): slide
03-21 12:11:39.349 E/zhangshuli(28603): statechange
03-21 12:11:39.360 E/zhangshuli(28603): slide
03-21 12:11:39.383 E/zhangshuli(28603): slide
03-21 12:11:39.404 E/zhangshuli(28603): slide
03-21 12:11:39.425 E/zhangshuli(28603): slide
03-21 12:11:39.446 E/zhangshuli(28603): slide
03-21 12:11:39.467 E/zhangshuli(28603): slide
03-21 12:11:39.488 E/zhangshuli(28603): slide
03-21 12:11:39.508 E/zhangshuli(28603): slide
03-21 12:11:39.529 E/zhangshuli(28603): slide
03-21 12:11:39.549 E/zhangshuli(28603): slide
03-21 12:11:39.585 E/zhangshuli(28603): slide
03-21 12:11:39.619 E/zhangshuli(28603): colse
03-21 12:11:39.619 E/zhangshuli(28603): statechange

 

也是一樣的。所以，在它的方法中，我們可以做很多事情

 

我們可以得出結論
1.onDrawerStateChanged：總是在drawerlayout狀態發生切換時候執行兩次，一次是狀態剛剛發生改變的時候，一次是狀態改變徹底完成的時候，它總是在監聽事件最開始跟末尾個執行一次
2.onDrawerSlide：它是在狀態發生改變的過程中一直執行
3.onDrawerOpened（打開）、onDrawerClosed（關閉）：他們是在狀態改變完成以后執行，是發生在第二次onDrawerStateChanged前面