如何通过多个包含为线性布局中的所有项目设置 onclick 侦听器

Question

我们正在构建 Android 闹钟应用程序，并且对移动开发了解不多。所以问题是：我们有 days_of_the_week.xml 线性布局，带有水平的星期几，它在 days_pick.xml 布局中被 included 多次，并且这个布局在 activity_add_page.xml 中被 included 。 我们希望能够以某种方式选择并突出显示用户在该组件中选择的日期。

是否可以不写这样的东西来做到这一点：

        one_week.monday_tv.setOnClickListener{
        it.setBackgroundColor(getColor(R.color.purple_active))
    }

days_of_the_week.xml：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/week_layout"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content">

    <TextView
        android:id="@+id/monday_tv"
        android:padding="5dp"
        android:layout_margin="5dp"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/monday" />

    <TextView
        android:id="@+id/tuesday_tv"
        android:padding="5dp"
        android:layout_margin="5dp"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/tuesday" />

    <TextView
        android:id="@+id/wednesday_tv"
        android:padding="5dp"
        android:layout_margin="5dp"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/wednesday" />

    <TextView
        android:id="@+id/thursday_tv"
        android:padding="5dp"
        android:layout_margin="5dp"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/thursday" />

    <TextView
        android:id="@+id/friday_tv"
        android:padding="5dp"
        android:layout_margin="5dp"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/friday" />

    <TextView
        android:id="@+id/saturday_tv"
        android:padding="5dp"
        android:layout_margin="5dp"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/saturday" />

    <TextView
        android:id="@+id/sunday_tv"
        android:padding="5dp"
        android:layout_margin="5dp"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/sunday" />

</LinearLayout>

days_pick.xml：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">


    <androidx.constraintlayout.widget.ConstraintLayout
        android:id="@+id/one_week"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        android:visibility="visible"
        >

        <include
            android:id="@+id/inc_week"
            layout="@layout/days_of_the_week"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintHorizontal_bias="0.497"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintVertical_bias="0.0" />

        <Button
            android:id="@+id/show_two_weeks_btn"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/even_odd_dp"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/inc_week"
            app:layout_constraintVertical_bias="0.043" />
    </androidx.constraintlayout.widget.ConstraintLayout>


    <androidx.constraintlayout.widget.ConstraintLayout
        android:id="@+id/two_weeks"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        android:visibility="gone"
        >


        <TextView
            android:id="@+id/odd_tv"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="10dp"
            android:rotation="-90"
            android:text="@string/odd_dp"
            android:textSize="12sp"
            app:layout_constraintEnd_toStartOf="@+id/odd_week"
            app:layout_constraintHorizontal_bias="0.901"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent" />

        <TextView
            android:id="@+id/even_tv"
            android:layout_width="30dp"
            android:layout_height="18dp"
            android:layout_marginTop="24dp"
            android:layout_marginEnd="8dp"
            android:rotation="-90"
            android:text="@string/even_dp"
            android:textSize="12sp"
            app:layout_constraintEnd_toStartOf="@+id/even_week"
            app:layout_constraintHorizontal_bias="0.984"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/odd_tv" />

        <include
            android:id="@+id/odd_week"
            layout="@layout/days_of_the_week"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintHorizontal_bias="0.497"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintVertical_bias="0.0" />

        <include
            android:id="@+id/even_week"
            layout="@layout/days_of_the_week"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintHorizontal_bias="0.497"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/odd_week"
            app:layout_constraintVertical_bias="0.007" />

        <Button
            android:id="@+id/show_one_week_btn"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="4dp"
            android:text="@string/one_week_dp"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintHorizontal_bias="0.498"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/even_week"
            app:layout_constraintVertical_bias="0.0" />


    </androidx.constraintlayout.widget.ConstraintLayout>



</LinearLayout>

activity_add_page.xml：

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">

        <TimePicker
            android:id="@+id/time_picker"
            style="@style/TimePickerAddingPageTheme"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center"
            android:layout_marginTop="36dp"
            android:layout_marginBottom="20dp"
            android:scaleX="1.50"
            android:scaleY="1.50"
            android:theme="@style/TimePickerAddingPageTheme"
            android:timePickerMode="spinner"/>

        <include
            android:id="@+id/week_pick"
            layout="@layout/days_pick"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            app:layout_constraintVertical_bias="0.212"
            android:layout_margin="20dp"/>

        <ScrollView
            android:id="@+id/scrollView2"
            android:layout_width="match_parent"
            android:layout_height="400dp">

            <LinearLayout
                android:id="@+id/linearLayout"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:orientation="vertical">

                <View
                    android:id="@+id/divider2"
                    android:layout_width="wrap_content"
                    android:layout_height="1dp"
                    android:layout_gravity="center"
                    android:layout_marginStart="28dp"
                    android:layout_marginEnd="28dp"
                    android:layout_marginBottom="10dp"
                    android:background="?android:attr/listDivider" />

                <EditText
                    android:id="@+id/editTextTextPersonName"
                    android:layout_width="347dp"
                    android:layout_height="wrap_content"
                    android:layout_gravity="center"
                    android:autofillHints="username"
                    android:backgroundTint="?attr/colorError"
                    android:ems="10"
                    android:hint="@string/signal_name_ap"
                    android:inputType="textPersonName"
                    android:maxLength="15" />

                <androidx.constraintlayout.widget.ConstraintLayout
                    android:layout_width="match_parent"
                    android:layout_height="72dp">

                    <TextView
                        style="@style/EachAddingPageTextStyle"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_marginStart="30dp"
                        android:text="@string/repeat_signal_ap"
                        app:layout_constraintBottom_toBottomOf="parent"
                        app:layout_constraintStart_toStartOf="parent"
                        app:layout_constraintTop_toTopOf="parent"
                        app:layout_constraintVertical_bias="0.509" />


                    <Spinner
                        android:id="@+id/repeat_spn_ap"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_marginEnd="28dp"
                        android:background="@drawable/spinner_background"
                        android:entries="@array/timeset_array"
                        android:gravity="center_vertical"
                        android:paddingStart="0dp"
                        android:paddingEnd="20dp"
                        app:layout_constraintBottom_toBottomOf="parent"
                        app:layout_constraintEnd_toEndOf="parent"
                        app:layout_constraintTop_toTopOf="parent" />

                </androidx.constraintlayout.widget.ConstraintLayout>

                <androidx.constraintlayout.widget.ConstraintLayout
                    android:layout_width="match_parent"
                    android:layout_height="72dp">

                    <TextView
                        style="@style/EachAddingPageTextStyle"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_marginStart="30dp"
                        android:text="@string/signal_melody_ap"
                        app:layout_constraintBottom_toBottomOf="parent"
                        app:layout_constraintStart_toStartOf="parent"
                        app:layout_constraintTop_toTopOf="parent"
                        app:layout_constraintVertical_bias="0.509" />

                    <Button
                        android:id="@+id/melody_btn_ap"
                        android:layout_width="30dp"
                        android:layout_height="28dp"
                        android:layout_marginEnd="25dp"
                        android:background="@drawable/ic_arrow_left"
                        android:onClick="onClick"
                        app:layout_constraintBottom_toBottomOf="parent"
                        app:layout_constraintEnd_toEndOf="parent"
                        app:layout_constraintTop_toTopOf="parent" />

                </androidx.constraintlayout.widget.ConstraintLayout>

                <androidx.constraintlayout.widget.ConstraintLayout
                    android:layout_width="match_parent"
                    android:layout_height="72dp">

                    <TextView
                        style="@style/EachAddingPageTextStyle"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_marginStart="30dp"
                        android:text="@string/vibration_ap"
                        app:layout_constraintBottom_toBottomOf="parent"
                        app:layout_constraintStart_toStartOf="parent"
                        app:layout_constraintTop_toTopOf="parent"
                        app:layout_constraintVertical_bias="0.433" />

                    <androidx.appcompat.widget.SwitchCompat
                        android:id="@+id/vibration_switch"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_marginEnd="25dp"
                        android:thumb="@drawable/custom_thumb"
                        app:layout_constraintBottom_toBottomOf="parent"
                        app:layout_constraintEnd_toEndOf="parent"
                        app:layout_constraintTop_toTopOf="parent"
                        app:layout_constraintVertical_bias="0.511"
                        app:showText="false"
                        app:switchMinWidth="40dp"
                        app:track="@drawable/custom_track" />

                </androidx.constraintlayout.widget.ConstraintLayout>

                <androidx.constraintlayout.widget.ConstraintLayout
                    android:layout_width="match_parent"
                    android:layout_height="72dp">

                    <TextView
                        style="@style/EachAddingPageTextStyle"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_marginStart="30dp"
                        android:text="@string/puzzle_on_alarm_ap"
                        app:layout_constraintBottom_toBottomOf="parent"
                        app:layout_constraintStart_toStartOf="parent"
                        app:layout_constraintTop_toTopOf="parent"
                        app:layout_constraintVertical_bias="0.509" />

                    <androidx.appcompat.widget.SwitchCompat
                        android:id="@+id/puzzle_switch"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_marginEnd="25dp"
                        android:thumb="@drawable/custom_thumb"
                        app:layout_constraintBottom_toBottomOf="parent"
                        app:layout_constraintEnd_toEndOf="parent"
                        app:layout_constraintTop_toTopOf="parent"
                        app:layout_constraintVertical_bias="0.511"
                        app:showText="false"
                        app:switchMinWidth="40dp"
                        app:track="@drawable/custom_track" />

                </androidx.constraintlayout.widget.ConstraintLayout>



            </LinearLayout>
        </ScrollView>
    </LinearLayout>

    <androidx.constraintlayout.widget.ConstraintLayout
        android:id="@+id/constraintLayout"
        android:layout_width="match_parent"
        android:layout_height="72dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent">

        <TextView
            style="@style/BottomBtnAddingPageTextStyle"
            android:id="@+id/cancel_tv_ap"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity=""
            android:onClick="onClick"
            android:text="@string/cancel_ap"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toStartOf="@+id/space2"
            app:layout_constraintHorizontal_bias="0.506"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintVertical_bias="0.509" />

        <Space
            android:id="@+id/space2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent" />

        <TextView
            style="@style/BottomBtnAddingPageTextStyle"
            android:id="@+id/save_tv_ap"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:onClick="onClick"
            android:text="@string/save_ap"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintHorizontal_bias="0.503"
            app:layout_constraintStart_toEndOf="@+id/space2"
            app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintVertical_bias="0.509" />

    </androidx.constraintlayout.widget.ConstraintLayout>

</androidx.constraintlayout.widget.ConstraintLayout>

添加页面活动.kt：

package com.example.alarme

import android.content.Intent
import android.graphics.Color
import android.graphics.drawable.ColorDrawable
import android.os.Bundle
import android.util.Log
import android.view.View
import android.widget.*
import androidx.appcompat.widget.SwitchCompat
import androidx.core.view.children
import androidx.fragment.app.FragmentActivity
import androidx.lifecycle.ViewModelProvider
import com.example.alarme.db.Alarm
import com.example.alarme.db.AlarmViewModel
import kotlinx.android.synthetic.main.activity_add_page.*
import kotlinx.android.synthetic.main.days_of_the_week.*
import kotlinx.android.synthetic.main.days_of_the_week.view.*
import kotlinx.android.synthetic.main.days_pick_fragment.*
import kotlinx.android.synthetic.main.days_pick_fragment.view.*
import java.sql.Time
import java.util.Calendar

class AddPageActivity : FragmentActivity() {
    private lateinit var alarmViewModel: AlarmViewModel
    var mTimePicker: TimePicker? = null
    var now: Calendar? = null
    var alarmName: EditText? = null
    var vibration: SwitchCompat? = null
    var puzzle: SwitchCompat? = null
    var weekMode: Spinner? = null

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_add_page)
        title = ""

        mTimePicker = findViewById(R.id.time_picker)
        mTimePicker?.setIs24HourView(true)

        mTimePicker?.descendantFocusability = TimePicker.FOCUS_BLOCK_DESCENDANTS

        //TODO: after localization be made, add verification of a language -> to 24 Hour mode/to AM,PM mode

        now = Calendar.getInstance()
        alarmName = findViewById(R.id.editTextTextPersonName)
        vibration = findViewById(R.id.vibration_switch)
        puzzle = findViewById(R.id.puzzle_switch)
        weekMode = findViewById(R.id.repeat_spn_ap)
        mTimePicker?.hour = now!![Calendar.HOUR_OF_DAY]
        mTimePicker?.minute = now!![Calendar.MINUTE]

        alarmViewModel = ViewModelProvider(this).get(AlarmViewModel::class.java)


        // my garbage listeners

//        val daysOneWeek = one_week.children.forEach {
//            daysListener(one_week, it.id)
//        }

        one_week.monday_tv.setOnClickListener{
            it.setBackgroundColor(getColor(R.color.purple_active))
        }

        daysListener(one_week, R.id.monday_tv)

        show_one_week_btn.setOnClickListener{
            one_week.visibility = View.VISIBLE
            two_weeks.visibility = View.GONE
        }

        show_two_weeks_btn.setOnClickListener{
            one_week.visibility = View.GONE
            two_weeks.visibility = View.VISIBLE
        }


        repeat_spn_ap.onItemSelectedListener = object : AdapterView.OnItemSelectedListener {
            override fun onItemSelected(parent: AdapterView<*>, view: View?, pos: Int, id: Long) {
                if (pos == 2) {
                    week_pick.visibility = View.VISIBLE
                }
                else {
                    week_pick.visibility = View.GONE
                }
            }

            override fun onNothingSelected(parent: AdapterView<*>) {
                week_pick.visibility = View.GONE
                // Another interface callback
            }
        }
    }

    private fun daysListener(weekCount: View, day: Int){
        weekCount.setOnClickListener{
            val currentDay = it.findViewById<TextView>(day)
            currentDay.setOnClickListener{
                currentDay.setBackgroundColor(getColor(R.color.purple_active))
            }
        }
    }

    fun onClick(view: View) {
        when (view.id) {
            R.id.melody_btn_ap -> {
                startActivity(Intent(this, MelodyPickActivity::class.java))
            }
            R.id.cancel_tv_ap -> {
                finish()
            }
            R.id.save_tv_ap -> {
                addAlarmToDb()
                finish()
            }
        }
    }

    private fun addAlarmToDb() {
        alarmViewModel.addAlarm(Alarm(
                0,
                "" + alarmName?.text,
                Time(mTimePicker!!.hour, mTimePicker!!.minute, 0),
                true,
                vibration?.isChecked!!,
                0, // will be fixed later with updated UI
                weekMode?.selectedItemPosition!!
        ))
    }
}

正如你所看到的，我尝试使用 forEach 但没有帮助

Answer 1

您可以在

AddPageActivity.kt

中声明一个通用方法。如下：

 fun onClickDayOfWeek(view: View) {
    Log.d("TAG", "View Clicked having ID= " + view.id)
   view.setBackgroundColor(getColor(R.color.purple_active))
 }

然后点击每个

view

，如下所示：

<TextView
    android:id="@+id/monday_tv"
    android:padding="5dp"
    android:layout_margin="5dp"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="@string/monday"
    android:onClick="onClickDayOfWeek" /> <!-- handling click-->

<TextView
    android:id="@+id/tuesday_tv"
    android:padding="5dp"
    android:layout_margin="5dp"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="@string/tuesday"
    android:onClick="onClickDayOfWeek" /> <!-- handling click-->

Answer 2

虽然这是一个老问题，但这可以是另一个解决方案。 从您想听到的布局：

fun example(){
    setContentView(R.layout.exampleLayout)
    val currentView: View =findViewById(R.id.exampleLayout)
    userActivityListener(currentView)
    ...
}

和监听器方法：

fun userActivityListener(currentView: View) {   
    currentView.setOnClickListener {        
        your code here   
    }
}