我是新手Java程序员和新手Android应用程序开发人员...我正在尝试制作一个简单的24小时数字时钟，就像一个时间选择器。在这种情况下，我不想使用标准的时间选择器小部件。应用程序也应该在Android 2.1 +上运行。
我的时钟应该是这样的 23：59。当用户单击最右边的时钟字段时，范围从 0 到 9（位于同一片段中）的按钮应更新此最右边的字段。还应突出显示该字段。我用
view.setBackgroundResource(R.color.solid_grey);
其他字段应该以相同的方式更新，当然要有一些逻辑来避免无效值。当用户触摸另一个字段时，应从第一个触摸的字段中删除突出显示。
我对这个问题的蹩脚解决方案：我所做的是制作五个文本视图，每个数字一个，冒号一个。我已经将 onTouch 侦听器附加到时钟中的可更改字段和按钮的 onClick 侦听器。然后我有一些或多或少复杂的代码，带有视图持有人和带有视图的标记按钮，以及什么不能让所有这些工作。
一定有更好的方法可以做到这一点！你不觉得吗？
首先，我尝试使用单个 TextView，然后检查字符串中表示文本视图中时钟的哪个索引被单击。但这在突出显示方面效果不佳。该索引也很难精确计算，因为我想不出比使用更好的主意
(int) event.getX();
在时钟文本视图的 OnTouchListener 中。
关于如何以最简单的方式实现这一目标的任何想法？如果没有，我必须坚持使用我制作的难以维护的代码（不，我不会在这里发布它）。：S
好的，我将在这里发布我自己的笨重解决方案。它可能不漂亮，但它正在工作。随意修改它以适合您的喜好。请记住，我是来自瑞典的新手。:P
颜色.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<!-- The two most significant hex sets the transparency value -->
<color name="timefield_highlight_color">#FF8F8F8F</color>
<color name="timefield_no_highlight_color">#FF000000</color>
</resources>
timepicker_digital_24h.xml根据自己的喜好更改@dimen-stuff。在布局中，使用xml包含标记，随心所欲。不要更改视图的id:。
<merge xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
<RelativeLayout
android:id="@+id/layout_timepicker_digital_24h"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="@dimen/vertical_margin" >
<TextView
android:id="@+id/textview_time_set_colon_divider"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:maxLength="1"
android:singleLine="true"
android:text=""
android:textSize="@dimen/alarm_time_huge_textsize"
tools:ignore="SpUsage" />
<TextView
android:id="@+id/textview_time_set_hour_right"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toLeftOf="@id/textview_time_set_colon_divider"
android:maxLength="1"
android:singleLine="true"
android:text=""
android:textSize="@dimen/alarm_time_huge_textsize"
tools:ignore="SpUsage" />
<TextView
android:id="@+id/textview_time_set_hour_left"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toLeftOf="@id/textview_time_set_hour_right"
android:maxLength="1"
android:singleLine="true"
android:text=""
android:textSize="@dimen/alarm_time_huge_textsize"
tools:ignore="SpUsage" />
<TextView
android:id="@+id/textview_time_set_minute_left"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toRightOf="@id/textview_time_set_colon_divider"
android:maxLength="1"
android:singleLine="true"
android:text=""
android:textSize="@dimen/alarm_time_huge_textsize"
tools:ignore="SpUsage" />
<TextView
android:id="@+id/textview_time_set_minute_right"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toRightOf="@id/textview_time_set_minute_left"
android:maxLength="1"
android:singleLine="true"
android:text=""
android:textSize="@dimen/alarm_time_huge_textsize"
tools:ignore="SpUsage" />
</RelativeLayout>
<LinearLayout
android:id="@+id/layout_time_buttons_row_1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="@dimen/horizontal_margin_small"
android:layout_marginRight="@dimen/horizontal_margin_small" >
<Button
android:id="@+id/button_1_time_set"
style="?android:attr/buttonStyleSmall"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_margin="@dimen/button_set_time_margin"
android:layout_weight="1"
android:text="1"
android:textSize="@dimen/button_set_time_textsize"
tools:ignore="HardcodedText" />
<Button
android:id="@+id/button_2_time_set"
style="?android:attr/buttonStyleSmall"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_margin="@dimen/button_set_time_margin"
android:layout_weight="1"
android:text="2"
android:textSize="@dimen/button_set_time_textsize"
tools:ignore="HardcodedText" />
<Button
android:id="@+id/button_3_time_set"
style="?android:attr/buttonStyleSmall"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_margin="@dimen/button_set_time_margin"
android:layout_weight="1"
android:text="3"
android:textSize="@dimen/button_set_time_textsize"
tools:ignore="HardcodedText" />
</LinearLayout>
<LinearLayout
android:id="@+id/layout_time_buttons_row_2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="@dimen/horizontal_margin_small"
android:layout_marginRight="@dimen/horizontal_margin_small" >
<Button
android:id="@+id/button_4_time_set"
style="?android:attr/buttonStyleSmall"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_margin="@dimen/button_set_time_margin"
android:layout_weight="1"
android:text="4"
android:textSize="@dimen/button_set_time_textsize"
tools:ignore="HardcodedText" />
<Button
android:id="@+id/button_5_time_set"
style="?android:attr/buttonStyleSmall"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_margin="@dimen/button_set_time_margin"
android:layout_weight="1"
android:text="5"
android:textSize="@dimen/button_set_time_textsize"
tools:ignore="HardcodedText" />
<Button
android:id="@+id/button_6_time_set"
style="?android:attr/buttonStyleSmall"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_margin="@dimen/button_set_time_margin"
android:layout_weight="1"
android:text="6"
android:textSize="@dimen/button_set_time_textsize"
tools:ignore="HardcodedText" />
</LinearLayout>
<LinearLayout
android:id="@+id/layout_time_buttons_row_3"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="@dimen/horizontal_margin_small"
android:layout_marginRight="@dimen/horizontal_margin_small" >
<Button
android:id="@+id/button_7_time_set"
style="?android:attr/buttonStyleSmall"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_margin="@dimen/button_set_time_margin"
android:layout_weight="1"
android:text="7"
android:textSize="@dimen/button_set_time_textsize"
tools:ignore="HardcodedText" />
<Button
android:id="@+id/button_8_time_set"
style="?android:attr/buttonStyleSmall"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_margin="@dimen/button_set_time_margin"
android:layout_weight="1"
android:text="8"
android:textSize="@dimen/button_set_time_textsize"
tools:ignore="HardcodedText" />
<Button
android:id="@+id/button_9_time_set"
style="?android:attr/buttonStyleSmall"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_margin="@dimen/button_set_time_margin"
android:layout_weight="1"
android:text="9"
android:textSize="@dimen/button_set_time_textsize"
tools:ignore="HardcodedText" />
</LinearLayout>
<Button
android:id="@+id/button_0_time_set"
style="?android:attr/buttonStyleSmall"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="@dimen/vertical_margin_large"
android:layout_marginLeft="@dimen/horizontal_margin"
android:layout_marginRight="@dimen/horizontal_margin"
android:layout_marginTop="@dimen/button_set_time_margin"
android:text="0"
android:textSize="@dimen/button_set_time_textsize"
tools:ignore="HardcodedText" />
</merge>
枚举.java
package com.example.example.timepicker;
public class Enums {
public static enum TimeField {
HOUR_LEFT, HOUR_RIGHT, MINUTE_LEFT, MINUTE_RIGHT, NONE;
public TimeField nextReal() {
TimeField fields[] = TimeField.values();
int ordinal = this.ordinal(); // incoming field index
switch(ordinal) {
case 0: // HOUR_LEFT
ordinal = 1;
break;
case 1: // HOUR_RIGHT
ordinal = 2;
break;
case 2: // MINUTE_LEFT
ordinal = 3;
break;
case 3: // MINUTE_RIGHT
ordinal = 0;
break;
case 4: // NONE
ordinal = 0;
}
return fields[ordinal];
}
}
}
时间选择数字24小时.java
（此代码中有一个 toast 字符串，您必须在 strings.xml 中定义该字符串。
package com.example.example.timepicker;
import android.app.Activity;
import android.content.Context;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.View.OnTouchListener;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;
import com.example.example.R;
import com.example.example.timepicker.Enums.TimeField;
public class TimePickerDigital24h implements OnClickListener, OnTouchListener {
private TimeField mTimeFieldToSet = TimeField.HOUR_LEFT;
private TextView mTextViewHourLeft, mTextViewHourRight, mTextViewMinuteLeft, mTextViewMinuteRight;
private Context mContext;
public TimePickerDigital24h (Context context, String hourOfDay, String minute) {
mContext = context;
mTextViewHourLeft = (TextView) ((Activity) context).findViewById(R.id.textview_time_set_hour_left);
mTextViewHourLeft.setText(hourOfDay.substring(0, 1));
mTextViewHourRight = (TextView) ((Activity) context).findViewById(R.id.textview_time_set_hour_right);
mTextViewHourRight.setText(hourOfDay.substring(1, 2));
mTextViewMinuteLeft = (TextView) ((Activity) context).findViewById(R.id.textview_time_set_minute_left);
mTextViewMinuteLeft.setText(minute.substring(0, 1));
mTextViewMinuteRight = (TextView) ((Activity) context).findViewById(R.id.textview_time_set_minute_right);
mTextViewMinuteRight.setText(minute.substring(1, 2));
mTextViewHourLeft.setOnTouchListener(this);
mTextViewHourRight.setOnTouchListener(this);
mTextViewMinuteLeft.setOnTouchListener(this);
mTextViewMinuteRight.setOnTouchListener(this);
this.setTimeFieldHighlight(TimeField.HOUR_LEFT);
Button button0 = (Button) ((Activity) context).findViewById(R.id.button_0_time_set);
button0.setOnClickListener(this);
Button button1 = (Button) ((Activity) context).findViewById(R.id.button_1_time_set);
button1.setOnClickListener(this);
Button button2 = (Button) ((Activity) context).findViewById(R.id.button_2_time_set);
button2.setOnClickListener(this);
Button button3 = (Button) ((Activity) context).findViewById(R.id.button_3_time_set);
button3.setOnClickListener(this);
Button button4 = (Button) ((Activity) context).findViewById(R.id.button_4_time_set);
button4.setOnClickListener(this);
Button button5 = (Button) ((Activity) context).findViewById(R.id.button_5_time_set);
button5.setOnClickListener(this);
Button button6 = (Button) ((Activity) context).findViewById(R.id.button_6_time_set);
button6.setOnClickListener(this);
Button button7 = (Button) ((Activity) context).findViewById(R.id.button_7_time_set);
button7.setOnClickListener(this);
Button button8 = (Button) ((Activity) context).findViewById(R.id.button_8_time_set);
button8.setOnClickListener(this);
Button button9 = (Button) ((Activity) context).findViewById(R.id.button_9_time_set);
button9.setOnClickListener(this);
}
@Override
public boolean onTouch(View view, MotionEvent event) {
switch(view.getId()) {
case R.id.textview_time_set_hour_left:
mTimeFieldToSet = TimeField.HOUR_LEFT;
this.setTimeFieldHighlight(mTimeFieldToSet);
return true;
case R.id.textview_time_set_hour_right:
mTimeFieldToSet = TimeField.HOUR_RIGHT;
this.setTimeFieldHighlight(mTimeFieldToSet);
return true;
case R.id.textview_time_set_minute_left:
mTimeFieldToSet = TimeField.MINUTE_LEFT;
this.setTimeFieldHighlight(mTimeFieldToSet);
return true;
case R.id.textview_time_set_minute_right:
mTimeFieldToSet = TimeField.MINUTE_RIGHT;
this.setTimeFieldHighlight(mTimeFieldToSet);
return true;
}
return false;
}
@Override
public void onClick(View view) {
int valueToSet = 0;
switch(view.getId()) {
case R.id.button_0_time_set:
valueToSet = 0;
break;
case R.id.button_1_time_set:
valueToSet = 1;
break;
case R.id.button_2_time_set:
valueToSet = 2;
break;
case R.id.button_3_time_set:
valueToSet = 3;
break;
case R.id.button_4_time_set:
valueToSet = 4;
break;
case R.id.button_5_time_set:
valueToSet = 5;
break;
case R.id.button_6_time_set:
valueToSet = 6;
break;
case R.id.button_7_time_set:
valueToSet = 7;
break;
case R.id.button_8_time_set:
valueToSet = 8;
break;
case R.id.button_9_time_set:
valueToSet = 9;
break;
}
try {
this.setTimeField(valueToSet);
} catch (UnsupportedOperationException e) {
Toast.makeText(mContext, mContext.getString(R.string.toast_time_set_error), Toast.LENGTH_LONG).show();
//e.printStackTrace();
}
}
// Setter for timefields in the clock time display. Also highlights the correct field.
private void setTimeField (int valueToSet) throws UnsupportedOperationException {
int hourLeft = Integer.parseInt(mTextViewHourLeft.getText().toString());
int hourRight = Integer.parseInt(mTextViewHourRight.getText().toString());
UnsupportedOperationException exception = new UnsupportedOperationException("Input value invalid for this clock field");
setTimeFieldHighlight(mTimeFieldToSet.nextReal());
switch(mTimeFieldToSet) {
case HOUR_LEFT:
if (valueToSet <= 1) {
mTextViewHourLeft.setText("" + valueToSet);
mTimeFieldToSet = TimeField.HOUR_RIGHT;
break;
} else if (valueToSet <= 2 && hourRight <= 3) {
mTextViewHourLeft.setText("" + valueToSet);
mTimeFieldToSet = TimeField.HOUR_RIGHT;
break;
} else if (valueToSet <= 2 && hourRight >= 4) {
mTextViewHourRight.setText("3");
mTextViewHourLeft.setText("" + valueToSet);
mTimeFieldToSet = TimeField.HOUR_RIGHT;
break;
} else {
setTimeFieldHighlight(mTimeFieldToSet);
throw exception;
}
case HOUR_RIGHT:
if (valueToSet <= 3) {
mTextViewHourRight.setText("" + valueToSet);
mTimeFieldToSet = TimeField.MINUTE_LEFT;
break;
} else if (valueToSet > 3 && hourLeft <= 1) {
mTextViewHourRight.setText("" + valueToSet);
mTimeFieldToSet = TimeField.MINUTE_LEFT;
break;
} else if (valueToSet > 3 && hourLeft >= 2) {
mTextViewHourLeft.setText("1");
mTextViewHourRight.setText("" + valueToSet);
mTimeFieldToSet = TimeField.MINUTE_LEFT;
break;
} else {
setTimeFieldHighlight(mTimeFieldToSet);
throw exception;
}
case MINUTE_LEFT:
if (valueToSet <= 5) {
mTextViewMinuteLeft.setText("" + valueToSet);
mTimeFieldToSet = TimeField.MINUTE_RIGHT;
break;
} else {
setTimeFieldHighlight(mTimeFieldToSet);
throw exception;
}
case MINUTE_RIGHT:
mTextViewMinuteRight.setText("" + valueToSet);
mTimeFieldToSet = TimeField.HOUR_LEFT;
break;
case NONE:
}
}
// Highlighting of the fields in the clock display
private void setTimeFieldHighlight(TimeField field) {
switch(field) {
case HOUR_LEFT:
mTextViewHourLeft.setBackgroundResource(R.color.timefield_highlight_color);
mTextViewHourRight.setBackgroundResource(R.color.timefield_no_highlight_color);
mTextViewMinuteLeft.setBackgroundResource(R.color.timefield_no_highlight_color);
mTextViewMinuteRight.setBackgroundResource(R.color.timefield_no_highlight_color);
break;
case HOUR_RIGHT:
mTextViewHourLeft.setBackgroundResource(R.color.timefield_no_highlight_color);
mTextViewHourRight.setBackgroundResource(R.color.timefield_highlight_color);
mTextViewMinuteLeft.setBackgroundResource(R.color.timefield_no_highlight_color);
mTextViewMinuteRight.setBackgroundResource(R.color.timefield_no_highlight_color);
break;
case MINUTE_LEFT:
mTextViewHourLeft.setBackgroundResource(R.color.timefield_no_highlight_color);
mTextViewHourRight.setBackgroundResource(R.color.timefield_no_highlight_color);
mTextViewMinuteLeft.setBackgroundResource(R.color.timefield_highlight_color);
mTextViewMinuteRight.setBackgroundResource(R.color.timefield_no_highlight_color);
break;
case MINUTE_RIGHT:
mTextViewHourLeft.setBackgroundResource(R.color.timefield_no_highlight_color);
mTextViewHourRight.setBackgroundResource(R.color.timefield_no_highlight_color);
mTextViewMinuteLeft.setBackgroundResource(R.color.timefield_no_highlight_color);
mTextViewMinuteRight.setBackgroundResource(R.color.timefield_highlight_color);
break;
case NONE:
mTextViewHourLeft.setBackgroundResource(R.color.timefield_no_highlight_color);
mTextViewHourRight.setBackgroundResource(R.color.timefield_no_highlight_color);
mTextViewMinuteLeft.setBackgroundResource(R.color.timefield_no_highlight_color);
mTextViewMinuteRight.setBackgroundResource(R.color.timefield_no_highlight_color);
}
}
public String getHourOfDay() {
String hourOfDay = mTextViewHourLeft.getText().toString()
+ mTextViewHourRight.getText().toString();
return hourOfDay;
}
public String getMinute() {
String minute = mTextViewMinuteLeft.getText().toString()
+ mTextViewMinuteRight.getText().toString();
return minute;
}
}
将这段代码放在 Fragment 的 OnActivityCreated 方法中，以实例化 TimePickerDigital24h 对象：**
mTimePicker = new TimePickerDigital24h(getActivity(), "23", "59");
您可以通过以下方式回读用户设置的时间：
mTimePicker.getHourOfDay();
mTimePicker.getMinute();
我相信代码可以在很多方面更好。如果你们知道如何以更简单的方式做到这一点，请告诉我。/疲惫的家伙