我打開了主要活動的導航抽屜 onCreate() 。我還想在顯示 1 或 2 秒后關閉該導航抽屜。我試過if(navDrawer.isHovered()){ navDrawer.closeDrawers(); }protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); ButterKnife.bind(this); setToolbarContent(imgNotification,txtNotification); fragmentManager = getSupportFragmentManager(); navDrawer.openDrawer(rightNavigationView,true); if(navDrawer.isHovered()){ navDrawer.closeDrawers(); } }我想知道如何設置關閉導航抽屜的計時器。有什么辦法嗎。
3 回答
FFIVE
TA貢獻1797條經驗 獲得超6個贊
步驟一：添加 Nav Drawer 的監聽器，在打開的回調中實現這個
@Override
public void onDrawerOpened(View drawerView) {
super.onDrawerOpened(drawerView);
}
將此代碼實現到此方法中
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
if(navDrawer.isOpened()){
navDrawer.closeDrawers();
}
}
},2000);
回首憶惘然
TA貢獻1847條經驗 獲得超11個贊
嘗試在 2 秒后關閉
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
navDrawer.closeDrawers();
}
},2000);
楊__羊羊
TA貢獻1943條經驗 獲得超7個贊
不要只是創建隨機處理程序對象，因為這可能會導致諸如由于待處理指令（可運行對象）而隨機關閉抽屜之類的問題。您可以直接將可運行對象發布/延遲后到視圖。例如：-
class ExampleActivity extends AppCompatActivity {
private static final long AUTO_CLOSE_DELAY = 2000L;
@Nullable
private DrawerLayout drawerLayout;
@NonNull
private final Runnable closeDrawerRunnable = new Runnable() {
@Override
public void run() {
if(drawerLayout!=null && drawerLayout.isDrawerOpen(GravityCompat.START)){
drawerLayout.closeDrawer(GravityCompat.START);
}
}
};
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_example);
drawerLayout = findViewById(R.id.drawerLayout);
drawerLayout.addDrawerListener(new DrawerLayout.DrawerListener() {
@Override
public void onDrawerSlide(@NonNull View drawerView, float slideOffset) {
}
@Override
public void onDrawerOpened(@NonNull View drawerView) {
drawerLayout.removeCallbacks(closeDrawerRunnable);
drawerLayout.postDelayed(closeDrawerRunnable,AUTO_CLOSE_DELAY);
}
@Override
public void onDrawerClosed(@NonNull View drawerView) {
drawerLayout.removeCallbacks(closeDrawerRunnable);
}
@Override
public void onDrawerStateChanged(int newState) {
}
});
}
}
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