Java 隐藏特定时间的布局
我正在构建应用程序。因为我想在上午8点到12点之间隐藏我的布局。我尝试使用线程和异步任务,但我不知道如何给出8到12之间的时间段Java 隐藏特定时间的布局,java,android,time,timepicker,Java,Android,Time,Timepicker,我正在构建应用程序。因为我想在上午8点到12点之间隐藏我的布局。我尝试使用线程和异步任务,但我不知道如何给出8到12之间的时间段 <LinearLayout android:layout_width="wrap_content" android:layout_height="wrap_content" android:orientation="horizontal"> <de.hdodenhof.circleimagev
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal">
<de.hdodenhof.circleimageview.CircleImageView
android:layout_width="40dp"
android:layout_height="50dp"
android:layout_marginLeft="3dp"
android:scaleType="centerCrop"
android:src="@drawable/vegitables"
app:civ_border_color="#80000000"
app:civ_border_width="1dp" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:layout_marginLeft="5dp"
android:text="Veg :"
android:textColor="#F00"
android:textSize="18sp"
android:textStyle="bold" />
</LinearLayout>
<ListView
android:id="@+id/list"
android:layout_width="match_parent"
android:layout_height="150dp"/>
</LinearLayout>
试试这个:
Calendar now = Calendar.getInstance();
int currentHour = now.get(Calendar.HOUR_OF_DAY);
if(currentHour >=7 && currentHour <= 11)
rootLayoutReference.setVisibility(View.GONE);
else
rootLayoutReference.setVisibility(View.VISIBLE);
Calendar now=Calendar.getInstance();
int currentHour=now.get(Calendar.HOUR/OF\u DAY);
如果(currentHour>=7&¤tHour请尝试以下操作:
Calendar now = Calendar.getInstance();
int currentHour = now.get(Calendar.HOUR_OF_DAY);
if(currentHour >=7 && currentHour <= 11)
rootLayoutReference.setVisibility(View.GONE);
else
rootLayoutReference.setVisibility(View.VISIBLE);
Calendar now=Calendar.getInstance();
int currentHour=now.get(Calendar.HOUR/OF\u DAY);
如果(currentHour>=7&¤tHour首先,上午12点表示午夜,而下午12点表示中午。我假设您的意思是中午,但此解决方案可以轻松更改为任何时间边界
您可以将以下内容添加到活动中:
public class MyActivity extends AppCompatActivity {
private Handler handler;
private View layout;
private Runnable updateVisibilityCallback;
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.my_activity);
handler = new Handler(Looper.getMainLooper());
layout = findViewById(R.id.layout);
updateVisibilityCallback = new Runnable() {
@Override
public void run() {
updateTextVisibility();
}
};
}
@Override
protected void onResume() {
super.onResume();
updateTextVisibility();
}
@Override
protected void onPause() {
super.onPause();
handler.removeCallbacks(updateVisibilityCallback);
}
private void updateTextVisibility() {
Calendar calendar = Calendar.getInstance();
int hour = calendar.get(Calendar.HOUR_OF_DAY);
if (8 <= hour && hour <= 11) {
layout.setVisibility(View.GONE);
} else {
layout.setVisibility(View.VISIBLE);
}
handler.postDelayed(updateVisibilityCallback, getVisibilityUpdateDelay());
}
private long getVisibilityUpdateDelay() {
Calendar rightNow = Calendar.getInstance();
int hour = rightNow.get(Calendar.HOUR_OF_DAY);
Calendar nextUpdate = Calendar.getInstance();
nextUpdate.set(Calendar.MINUTE, 0);
nextUpdate.set(Calendar.SECOND, 0);
nextUpdate.set(Calendar.MILLISECOND, 0);
if (hour < 8) {
nextUpdate.set(Calendar.HOUR_OF_DAY, 8);
} else if (hour < 12) {
nextUpdate.set(Calendar.HOUR_OF_DAY, 12);
} else {
nextUpdate.add(Calendar.DATE, 1);
nextUpdate.set(Calendar.HOUR_OF_DAY, 8);
}
return nextUpdate.getTimeInMillis() - rightNow.getTimeInMillis();
}
}
公共类MyActivity扩展了AppCompatActivity{
私人经办人;
私家景观布局;
私有可运行的updateVisibilityCallback;
@凌驾
创建时受保护的void(@Nullable Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.my_活动);
handler=新处理程序(Looper.getMainLooper());
布局=findViewById(R.id.layout);
updateVisibilityCallback=new Runnable(){
@凌驾
公开募捐{
updateTextVisibility();
}
};
}
@凌驾
受保护的void onResume(){
super.onResume();
updateTextVisibility();
}
@凌驾
受保护的void onPause(){
super.onPause();
handler.removeCallbacks(updateVisibilityCallback);
}
私有void updateTextVisibility(){
日历=Calendar.getInstance();
int hour=calendar.get(calendar.hour/OF\u DAY);
如果(8首先,上午12点意味着午夜,而下午12点意味着中午。我假设你的意思是中午,但这个解决方案可以很容易地更改为任何时间边界
您可以将以下内容添加到活动中:
public class MyActivity extends AppCompatActivity {
private Handler handler;
private View layout;
private Runnable updateVisibilityCallback;
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.my_activity);
handler = new Handler(Looper.getMainLooper());
layout = findViewById(R.id.layout);
updateVisibilityCallback = new Runnable() {
@Override
public void run() {
updateTextVisibility();
}
};
}
@Override
protected void onResume() {
super.onResume();
updateTextVisibility();
}
@Override
protected void onPause() {
super.onPause();
handler.removeCallbacks(updateVisibilityCallback);
}
private void updateTextVisibility() {
Calendar calendar = Calendar.getInstance();
int hour = calendar.get(Calendar.HOUR_OF_DAY);
if (8 <= hour && hour <= 11) {
layout.setVisibility(View.GONE);
} else {
layout.setVisibility(View.VISIBLE);
}
handler.postDelayed(updateVisibilityCallback, getVisibilityUpdateDelay());
}
private long getVisibilityUpdateDelay() {
Calendar rightNow = Calendar.getInstance();
int hour = rightNow.get(Calendar.HOUR_OF_DAY);
Calendar nextUpdate = Calendar.getInstance();
nextUpdate.set(Calendar.MINUTE, 0);
nextUpdate.set(Calendar.SECOND, 0);
nextUpdate.set(Calendar.MILLISECOND, 0);
if (hour < 8) {
nextUpdate.set(Calendar.HOUR_OF_DAY, 8);
} else if (hour < 12) {
nextUpdate.set(Calendar.HOUR_OF_DAY, 12);
} else {
nextUpdate.add(Calendar.DATE, 1);
nextUpdate.set(Calendar.HOUR_OF_DAY, 8);
}
return nextUpdate.getTimeInMillis() - rightNow.getTimeInMillis();
}
}
公共类MyActivity扩展了AppCompatActivity{
私人经办人;
私家景观布局;
私有可运行的updateVisibilityCallback;
@凌驾
创建时受保护的void(@Nullable Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.my_活动);
handler=新处理程序(Looper.getMainLooper());
布局=findViewById(R.id.layout);
updateVisibilityCallback=new Runnable(){
@凌驾
公开募捐{
updateTextVisibility();
}
};
}
@凌驾
受保护的void onResume(){
super.onResume();
updateTextVisibility();
}
@凌驾
受保护的void onPause(){
super.onPause();
handler.removeCallbacks(updateVisibilityCallback);
}
私有void updateTextVisibility(){
日历=Calendar.getInstance();
int hour=calendar.get(calendar.hour/OF\u DAY);
if(8)您需要设置一个函数在上午8点到12点之间隐藏此版面(使用检查当前时间),并在承载此版面的活动的onResume()
中调用它。if(getNow在上午8点到12点之间){layout.hide()}或者{layout.show()}
您需要设置一个函数在上午8点到12点之间隐藏此版面(使用检查当前时间)并在托管此版面的活动的onResume()
中调用它。如果(getNow在上午8点到12点之间){layout.hide()}否则{layout.show()}
一天中的小时数
不是以零为基础的。您可以使用8和12。我在这方面做了很少的更改,因为(日历日中的小时数)它给我24小时,所以如果(currentHour>=8&¤tHourhour\u OF_DAY
不是以零为基础的,你可以使用8和12。我在这方面做了一些改动,因为(Calendar.hour\u OF_DAY)它给我24小时,所以我把if(currentHour>=8&¤tHour>放在这里