Android是谷歌的移动操作系统，用于编程或开发数字设备（智能手机，平板电脑，汽车，电视，磨损，玻璃，物联网）。对于与Android相关的主题，请使用特定于Android的标签，如android-intent，android-activity，android-adapter等。对于开发或编程以外的问题，但与Android框架相关的问题，请使用以下链接：https：// android.stackexchange.com。
最好的方法是什么？如何为应用程序设置配置文件？ 我希望该应用程序能够查看SD卡上的文本文件，并选择某些信息
我需要验证是否抛出了例外或调用了一些记录方法。 这是我的代码 有趣的停止（）{ println（“ -----”） CoroutinesCope（dispatchers.io）.launch { t ...
那里有手机生成GPS坐标，经度的范围从0到360？ 我的应用程序的经度范围为-180至180。 因此，我只是想知道我是否需要添加额外的步骤来检查并确保这也是设备使用的格式。 有电话还是
有手机或浏览器产生GSP坐标的经度范围从0到360？
在我的Android应用程序中，我有一个功能可以共享一些信息。我使用意图（纯文本）以用户选择的任何方式共享信息（WhatsApp，电子邮件等）。现在，我有
设置Android：带有databinding的TextAppearance
android:textAppearance
当键盘专注于该按钮时，如何在按钮上添加边框？为了使我的应用程序可访问，我需要在集中元素中添加边框。目前看起来像第一个pi ...
改变Android datepicker的颜色 我尝试了如何更改Android 5.0的datePicker对话框颜色的一些建议 公共静态空白
更改datePicker对话框的颜色，但唯一的问题是下一个按钮在编写代码
WEBVTT 00:00:00.000 --> 00:00:05.000 /xxxxx/xxxx-xxx-xx-xxx.webp#xywh=0,0,160,90 00:00:05.000 --> 00:00:10.000 /xxxxx/xxxx-xxx-xx-xxx.webp#xywh=160,0,160,90 00:00:10.000 --> 00:00:15.000 /xxxxx/xxxx-xxx-xx-xxx.webp#xywh=320,0,160,90 00:00:15.000 --> 00:00:20.000 /xxxxx/xxxx-xxx-xx-xxx.webp#xywh=480,0,160,90 00:00:20.000 --> 00:00:25.000 /xxxxx/xxxx-xxx-xx-xxx.webp#xywh=640,0,160,90 00:00:25.000 --> 00:00:30.000 /xxxxx/xxxx-xxx-xx-xxx.webp#xywh=0,90,160,90 00:00:30.000 --> 00:00:35.000 /xxxxx/xxxx-xxx-xx-xxx.webp#xywh=160,90,160,90 00:00:35.000 --> 00:00:40.000 /xxxxx/xxxx-xxx-xx-xxx.webp#xywh=320,90,160,90
我在xml布局文件中有一个按钮 <Button android:id="@+id/button_heat" android:layout_width="0dp" android:layout_height="0dp" android:text="@string/heat" android:textSize="11sp" android:background="@drawable/heat_button_background" app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintHeight_percent="0.124" app:layout_constraintHorizontal_bias="0.373" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toTopOf="parent" app:layout_constraintVertical_bias="0.885" app:layout_constraintWidth_percent="0.12" /> IT已连接到主Java片段中的重复侦听器： // Define and register RepeatListener on the heat button binding.buttonHeat.setOnTouchListener(new RepeatListener(30, 30, this.getContext(), view -> { rotationAngle -= 11.0F; binding.fan.setRotation(-rotationAngle); currentlyActiveEventRectangleInTarget = checkPositionsOfActiveElements(true); if (currentlyActiveEventRectangleInTarget!= lastIntervalActiveEventRectangleInTarget) { if (lastIntervalActiveEventRectangleInTarget !=null && lastIntervalActiveEventRectangleInTarget.getEventType().equals(FR_Game.VIEW_EVENT_RECTANGLE_SOLAR)) { lastIntervalActiveEventRectangleInTarget.setBackground(ContextCompat.getDrawable(requireContext(), R.drawable.game_event_rectangle_solar_1)); } if (lastIntervalActiveEventRectangleInTarget !=null && lastIntervalActiveEventRectangleInTarget.getEventType().equals(FR_Game.VIEW_EVENT_RECTANGLE_WIND)) { lastIntervalActiveEventRectangleInTarget.setBackground(ContextCompat.getDrawable(requireContext(), R.drawable.game_event_rectangle_wind_1)); } if (lastIntervalActiveEventRectangleInTarget !=null && lastIntervalActiveEventRectangleInTarget.getEventType().equals(FR_Game.VIEW_EVENT_RECTANGLE_GAS)) { lastIntervalActiveEventRectangleInTarget.setBackground(ContextCompat.getDrawable(requireContext(), R.drawable.game_event_rectangle_gas_1)); } if (lastIntervalActiveEventRectangleInTarget !=null && lastIntervalActiveEventRectangleInTarget.getEventType().equals(FR_Game.VIEW_EVENT_RECTANGLE_COAL)) { lastIntervalActiveEventRectangleInTarget.setBackground(ContextCompat.getDrawable(requireContext(), R.drawable.game_event_rectangle_coal_1)); } lastIntervalActiveEventRectangleInTarget = currentlyActiveEventRectangleInTarget; } else { if (lastIntervalActiveEventRectangleInTarget !=null && lastIntervalActiveEventRectangleInTarget.getEventType().equals(FR_Game.VIEW_EVENT_RECTANGLE_SOLAR)) { lastIntervalActiveEventRectangleInTarget.setBackground(ContextCompat.getDrawable(requireContext(), R.drawable.game_event_rectangle_solar_2)); } if (lastIntervalActiveEventRectangleInTarget !=null && lastIntervalActiveEventRectangleInTarget.getEventType().equals(FR_Game.VIEW_EVENT_RECTANGLE_WIND)) { lastIntervalActiveEventRectangleInTarget.setBackground(ContextCompat.getDrawable(requireContext(), R.drawable.game_event_rectangle_wind_2)); } if (lastIntervalActiveEventRectangleInTarget !=null && lastIntervalActiveEventRectangleInTarget.getEventType().equals(FR_Game.VIEW_EVENT_RECTANGLE_GAS)) { lastIntervalActiveEventRectangleInTarget.setBackground(ContextCompat.getDrawable(requireContext(), R.drawable.game_event_rectangle_gas_2)); } if (lastIntervalActiveEventRectangleInTarget !=null && lastIntervalActiveEventRectangleInTarget.getEventType().equals(FR_Game.VIEW_EVENT_RECTANGLE_COAL)) { lastIntervalActiveEventRectangleInTarget.setBackground(ContextCompat.getDrawable(requireContext(), R.drawable.game_event_rectangle_coal_2)); } } // the code to execute repeatedly if(heatBuilding) { thermometer.changeTemperature(0.6); RepeatListener.setCurrentlyActiveGameRectangle(currentlyActiveEventRectangleInTarget); } if (heatDHWTank) { hotWaterTank.changeVolumeBar(0.6); RepeatListener.setCurrentlyActiveGameRectangle(currentlyActiveEventRectangleInTarget); } lastIntervalActiveEventRectangleInTarget = currentlyActiveEventRectangleInTarget; view.performClick(); })); The repeat listener looks like this package com.example.game; import android.annotation.SuppressLint; import android.content.Context; import android.os.Handler; import android.view.MotionEvent; import android.view.View; import androidx.core.content.ContextCompat; /** * A class, that can be used as a TouchListener on any view (e.g. a Button). * It cyclically runs a clickListener, emulating keyboard-like behaviour. First * click is fired immediately, next one after the initialInterval, and subsequent * ones after the normalInterval. * * <p>Interval is scheduled after the onClick completes, so it has to run fast. * If it runs slow, it does not generate skipped onClicks. Can be rewritten to * achieve this. */ public class RepeatListener implements View.OnTouchListener { private final Handler handler = new Handler(); private final int initialInterval; private final int normalInterval; private final View.OnClickListener clickListener; private View touchedView; private final Context context; private static View_Game_Event_Rectangle currentlyActiveGameRectangle; private final Runnable handlerRunnable = new Runnable() { @Override public void run() { if(touchedView.isEnabled()) { handler.postDelayed(this, normalInterval); clickListener.onClick(touchedView); } else { // if the view was disabled by the clickListener, remove the callback handler.removeCallbacks(handlerRunnable); touchedView.setPressed(false); touchedView = null; } } }; /** * @param initialInterval The interval after first click event * @param normalInterval The interval after second and subsequent click * events * @param clickListener The OnClickListener, that will be called * periodically */ public RepeatListener(int initialInterval, int normalInterval, Context context, View.OnClickListener clickListener) { if (clickListener == null) throw new IllegalArgumentException("null runnable"); if (initialInterval < 0 || normalInterval < 0) throw new IllegalArgumentException("negative interval"); this.initialInterval = initialInterval; this.normalInterval = normalInterval; this.clickListener = clickListener; this.context = context; } @SuppressLint("ClickableViewAccessibility") public boolean onTouch(View view, MotionEvent motionEvent) { switch (motionEvent.getAction()) { case MotionEvent.ACTION_DOWN: handler.removeCallbacks(handlerRunnable); handler.postDelayed(handlerRunnable, initialInterval); touchedView = view; touchedView.setPressed(true); touchedView.setBackgroundResource(R.drawable.heat_button_background_pressed); clickListener.onClick(view); if (currentlyActiveGameRectangle !=null) { if(currentlyActiveGameRectangle.getEventType().equals(FR_Game.VIEW_EVENT_RECTANGLE_SOLAR)) { currentlyActiveGameRectangle.setBackground(ContextCompat.getDrawable(context, R.drawable.game_event_rectangle_solar_2)); } if(currentlyActiveGameRectangle.getEventType().equals(FR_Game.VIEW_EVENT_RECTANGLE_WIND)) { currentlyActiveGameRectangle.setBackground(ContextCompat.getDrawable(context, R.drawable.game_event_rectangle_wind_2)); } if(currentlyActiveGameRectangle.getEventType().equals(FR_Game.VIEW_EVENT_RECTANGLE_GAS)) { currentlyActiveGameRectangle.setBackground(ContextCompat.getDrawable(context, R.drawable.game_event_rectangle_gas_2)); } if(currentlyActiveGameRectangle.getEventType().equals(FR_Game.VIEW_EVENT_RECTANGLE_COAL)) { currentlyActiveGameRectangle.setBackground(ContextCompat.getDrawable(context, R.drawable.game_event_rectangle_coal_2)); } } return true; case MotionEvent.ACTION_UP: // Restore normal background if (touchedView != null) { touchedView.setBackgroundResource(R.drawable.heat_button_background_normal); touchedView.setPressed(false); // Remove the pressed state handler.removeCallbacks(handlerRunnable); } if (currentlyActiveGameRectangle !=null) { if(currentlyActiveGameRectangle.getEventType().equals(FR_Game.VIEW_EVENT_RECTANGLE_SOLAR)) { currentlyActiveGameRectangle.setBackground(ContextCompat.getDrawable(context, R.drawable.game_event_rectangle_solar_1)); } if(currentlyActiveGameRectangle.getEventType().equals(FR_Game.VIEW_EVENT_RECTANGLE_WIND)) { currentlyActiveGameRectangle.setBackground(ContextCompat.getDrawable(context, R.drawable.game_event_rectangle_wind_1)); } if(currentlyActiveGameRectangle.getEventType().equals(FR_Game.VIEW_EVENT_RECTANGLE_GAS)) { currentlyActiveGameRectangle.setBackground(ContextCompat.getDrawable(context, R.drawable.game_event_rectangle_gas_1)); } if(currentlyActiveGameRectangle.getEventType().equals(FR_Game.VIEW_EVENT_RECTANGLE_COAL)) { currentlyActiveGameRectangle.setBackground(ContextCompat.getDrawable(context, R.drawable.game_event_rectangle_coal_1)); } } return true; case MotionEvent.ACTION_CANCEL: handler.removeCallbacks(handlerRunnable); touchedView.setPressed(false); touchedView = null; return true; } return false; } public static void setCurrentlyActiveGameRectangle(View_Game_Event_Rectangle currentlyActiveGameRectangle) { RepeatListener.currentlyActiveGameRectangle = currentlyActiveGameRectangle; } } 我有3个XML可绘制的文件： heat_button_background： <?xml version="1.0" encoding="utf-8"?> <selector xmlns:android="http://schemas.android.com/apk/res/android"> <item android:state_pressed="true"> <layer-list> <item> <shape android:shape="rectangle"> <solid android:color="#FFFFFF" /> <!-- White when pressed --> <corners android:radius="8dp" /> <!-- Rounded corners --> </shape> </item> </layer-list> </item> <item> <layer-list> <item> <shape android:shape="rectangle"> <solid android:color="#CCCCCC" /> <!-- Light gray when not pressed --> <corners android:radius="8dp" /> <!-- Rounded corners --> </shape> </item> </layer-list> </item> </selector> -heat_button_background_normal： <?xml version="1.0" encoding="utf-8"?> <selector xmlns:android="http://schemas.android.com/apk/res/android"> <item> <layer-list> <item> <shape android:shape="rectangle"> <solid android:color="#CCCCCC" /> <!-- Light gray when not pressed --> <corners android:radius="8dp" /> <!-- Rounded corners --> </shape> </item> </layer-list> </item> </selector> -heat_button_background_presse： <?xml version="1.0" encoding="utf-8"?> <selector xmlns:android="http://schemas.android.com/apk/res/android"> <item> <layer-list> <item> <shape android:shape="rectangle"> <solid android:color="#FFFFFF" /> <!-- White when pressed --> <corners android:radius="8dp" /> <!-- Rounded corners --> </shape> </item> </layer-list> </item> </selector> 当按下按钮时，请不更改其颜色或有关其布局的任何内容（Altough使用重复侦听器正常工作的游戏应用程序中的按钮逻辑）。您能想到为什么会发生这种情况吗？我认为这可能与重复的听众有关，因为它可能会刷新布局或类似的东西。但是我尝试了很多，无法解决问题。 reminder：有人知道为什么会发生这种情况吗？ 任期RepeatListener.java import android.annotation.SuppressLint; import android.content.Context; import android.graphics.drawable.Drawable; import android.view.MotionEvent; import android.view.View; import android.os.Handler; import androidx.core.content.ContextCompat; public class RepeatListener implements View.OnTouchListener { private final int initialInterval; private final int normalInterval; private final View.OnClickListener clickListener; private final Context context; private final Handler handler = new Handler(); private View touchedView; private final Runnable handlerRunnable = new Runnable() { @Override public void run() { if (touchedView != null && touchedView.isPressed()) { clickListener.onClick(touchedView); handler.postDelayed(this, normalInterval); } } }; public RepeatListener(int initialInterval, int normalInterval, Context context, View.OnClickListener clickListener) { if (clickListener == null) throw new IllegalArgumentException("null runnable"); if (initialInterval < 0 || normalInterval < 0) throw new IllegalArgumentException("negative interval"); this.initialInterval = initialInterval; this.normalInterval = normalInterval; this.clickListener = clickListener; this.context = context; } @SuppressLint("ClickableViewAccessibility") @Override public boolean onTouch(View view, MotionEvent motionEvent) { switch (motionEvent.getAction()) { case MotionEvent.ACTION_DOWN: handler.removeCallbacks(handlerRunnable); handler.postDelayed(handlerRunnable, initialInterval); touchedView = view; touchedView.setPressed(true); // Change background when pressed Drawable pressedDrawable = ContextCompat.getDrawable(context, R.drawable.heat_button_background_pressed); touchedView.setBackground(pressedDrawable); clickListener.onClick(view); return true; case MotionEvent.ACTION_UP: case MotionEvent.ACTION_CANCEL: if (touchedView != null) { touchedView.setPressed(false); handler.removeCallbacks(handlerRunnable); // Restore default background Drawable normalDrawable = ContextCompat.getDrawable(context, R.drawable.heat_button_background_normal); touchedView.setBackground(normalDrawable); touchedView = null; } return true; } return false; } } 任职背景绘图 res/drawable/heat_button_background_normal.xml <?xml version="1.0" encoding="utf-8"?> <shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle"> <solid android:color="#CCCCCC"/> <!-- Light gray when not pressed --> <corners android:radius="8dp"/> </shape> res/drawable/heat_button_background_pressed.xml <?xml version="1.0" encoding="utf-8"?> <shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle"> <solid android:color="#FFFFFF"/> <!-- White when pressed --> <corners android:radius="8dp"/> </shape>
没有默认支持将Kotlin密封类插入或检索到房间数据库中的支持。枚举可以轻松工作，但不能密封班级。下面是我下载status seal的示例 @