本文介绍了使用来自其原始类的自定义 android AnalogClock 设置时间的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我想使用 Internet 上提供的 Android 开源项目的 AnalogClock 源代码制作自定义 AnalogClock 类.
I want to make a custom AnalogClock class using source code of AnalogClock by Android Open Source Project that is available in the internet.
我想让时钟设置我想要的时间，而不是当前时间.我没有找到一个明确的例子来说明如何做到这一点，所以也许这篇文章会有用.将源代码复制到新文件后，出现一些错误.下面是AnalogClock的原始源码:
I want to make the clock set the time that I want, not the current time. I didn't find a clear example on how to do it so maybe this post will be useful. After copying source code to new file, I get some errors. Below is the original source code of AnalogClock:
/*
* Copyright (C) 2006 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package android.widget;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.BroadcastReceiver;
import android.content.res.Resources;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.drawable.Drawable;
import android.os.Handler;
import android.text.format.Time;
import android.util.AttributeSet;
import android.view.View;
import android.widget.RemoteViews.RemoteView;
import java.util.TimeZone;
/**
* This widget display an analogic clock with two hands for hours and
* minutes.
*/
@RemoteView
public class AnalogClock extends View {
private Time mCalendar;
private Drawable mHourHand;
private Drawable mMinuteHand;
private Drawable mDial;
private int mDialWidth;
private int mDialHeight;
private boolean mAttached;
private final Handler mHandler = new Handler();
private float mMinutes;
private float mHour;
private boolean mChanged;
public AnalogClock(Context context) {
this(context, null);
}
public AnalogClock(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
!!Error mContext -> 将 mContext 更改为上下文(我可以这样做)吗?
public AnalogClock(Context context, AttributeSet attrs,
int defStyle) {
super(context, attrs, defStyle);
Resources r = mContext.getResources();
!!无法解决错误 com.android.internal.R.我找到了解决这个问题的方法
!!Error com.android.internal.R cannot be resolved.I found a solution to this problem with
mDial = r.getDrawable(Resources.getSystem().getIdentifier("clock_dial","drawable", "android"));
其他行也一样，只是更改名称和可绘制或可样式化.
And same for other lines just changing name and either drawable or styleable.
vvvv----但是下面的代码我还是有问题.
TypedArray a =
context.obtainStyledAttributes(
attrs, com.android.internal.R.styleable.AnalogClock, defStyle, 0);
^^^^----我不知道如何更改它并使其工作
mDial = a.getDrawable(com.android.internal.R.styleable.AnalogClock_dial);
if (mDial == null) {
mDial = r.getDrawable(com.android.internal.R.drawable.clock_dial);
}
mHourHand = a.getDrawable(com.android.internal.R.styleable.AnalogClock_hand_hour);
if (mHourHand == null) {
mHourHand = r.getDrawable(com.android.internal.R.drawable.clock_hand_hour);
}
mMinuteHand = a.getDrawable(com.android.internal.R.styleable.AnalogClock_hand_minute);
if (mMinuteHand == null) {
mMinuteHand = r.getDrawable(com.android.internal.R.drawable.clock_hand_minute);
}
mCalendar = new Time();
mDialWidth = mDial.getIntrinsicWidth();
mDialHeight = mDial.getIntrinsicHeight();
}
@Override
protected void onAttachedToWindow() {
super.onAttachedToWindow();
if (!mAttached) {
mAttached = true;
IntentFilter filter = new IntentFilter();
filter.addAction(Intent.ACTION_TIME_TICK);
filter.addAction(Intent.ACTION_TIME_CHANGED);
filter.addAction(Intent.ACTION_TIMEZONE_CHANGED);
getContext().registerReceiver(mIntentReceiver, filter, null, mHandler);
}
// NOTE: It's safe to do these after registering the receiver since the receiver always runs
// in the main thread, therefore the receiver can't run before this method returns.
// The time zone may have changed while the receiver wasn't registered, so update the Time
mCalendar = new Time();
// Make sure we update to the current time
onTimeChanged();
}
@Override
protected void onDetachedFromWindow() {
super.onDetachedFromWindow();
if (mAttached) {
getContext().unregisterReceiver(mIntentReceiver);
mAttached = false;
}
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
int widthMode = MeasureSpec.getMode(widthMeasureSpec);
int widthSize = MeasureSpec.getSize(widthMeasureSpec);
int heightMode = MeasureSpec.getMode(heightMeasureSpec);
int heightSize = MeasureSpec.getSize(heightMeasureSpec);
float hScale = 1.0f;
float vScale = 1.0f;
if (widthMode != MeasureSpec.UNSPECIFIED && widthSize < mDialWidth) {
hScale = (float) widthSize / (float) mDialWidth;
}
if (heightMode != MeasureSpec.UNSPECIFIED && heightSize < mDialHeight) {
vScale = (float )heightSize / (float) mDialHeight;
}
float scale = Math.min(hScale, vScale);
setMeasuredDimension(resolveSize((int) (mDialWidth * scale), widthMeasureSpec),
resolveSize((int) (mDialHeight * scale), heightMeasureSpec));
}
@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
super.onSizeChanged(w, h, oldw, oldh);
mChanged = true;
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
boolean changed = mChanged;
if (changed) {
mChanged = false;
}
!!!错误 - mRight、mLeft、mBotton、mTop 来自哪里?该文件中没有声明
int availableWidth = mRight - mLeft;
int availableHeight = mBottom - mTop;
int x = availableWidth / 2;
int y = availableHeight / 2;
final Drawable dial = mDial;
int w = dial.getIntrinsicWidth();
int h = dial.getIntrinsicHeight();
boolean scaled = false;
if (availableWidth < w || availableHeight < h) {
scaled = true;
float scale = Math.min((float) availableWidth / (float) w,
(float) availableHeight / (float) h);
canvas.save();
canvas.scale(scale, scale, x, y);
}
if (changed) {
dial.setBounds(x - (w / 2), y - (h / 2), x + (w / 2), y + (h / 2));
}
dial.draw(canvas);
canvas.save();
canvas.rotate(mHour / 12.0f * 360.0f, x, y);
final Drawable hourHand = mHourHand;
if (changed) {
w = hourHand.getIntrinsicWidth();
h = hourHand.getIntrinsicHeight();
hourHand.setBounds(x - (w / 2), y - (h / 2), x + (w / 2), y + (h / 2));
}
hourHand.draw(canvas);
canvas.restore();
canvas.save();
canvas.rotate(mMinutes / 60.0f * 360.0f, x, y);
final Drawable minuteHand = mMinuteHand;
if (changed) {
w = minuteHand.getIntrinsicWidth();
h = minuteHand.getIntrinsicHeight();
minuteHand.setBounds(x - (w / 2), y - (h / 2), x + (w / 2), y + (h / 2));
}
minuteHand.draw(canvas);
canvas.restore();
if (scaled) {
canvas.restore();
}
}
private void onTimeChanged() {
mCalendar.setToNow();
int hour = mCalendar.hour;
int minute = mCalendar.minute;
int second = mCalendar.second;
mMinutes = minute + second / 60.0f;
mHour = hour + mMinutes / 60.0f;
mChanged = true;
}
private final BroadcastReceiver mIntentReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
if (intent.getAction().equals(Intent.ACTION_TIMEZONE_CHANGED)) {
String tz = intent.getStringExtra("time-zone");
mCalendar = new Time(TimeZone.getTimeZone(tz).getID());
}
onTimeChanged();
invalidate();
}
};
}
谁能告诉我:
- 如何让这个类像普通的 AnalogClock 一样工作
- 如何在这个类中编写一个方法来应用我将提供给它的时间?
推荐答案
使用 setTime() 方法自定义 MyAnalogClock.
花了一些时间后，我终于设法解决了这个问题.我希望它对某人有用.只需调用 setTime(hours, minutes, seconds) 方法即可设置时间.
After spending some time I finally managed to solve the problem.I hope it will be useful for someone.You can set time simply by calling setTime(hours, minutes, seconds) method.
import android.content.Context;
import android.content.res.Resources;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.drawable.Drawable;
import android.text.format.Time;
import android.util.AttributeSet;
import android.view.View;
import android.widget.RemoteViews.RemoteView;
/**
* This widget display an analogic clock with two hands for hours and
* minutes.
*/
@RemoteView
public class MyAnalogClock extends View {
private Drawable mHourHand;
private Drawable mMinuteHand;
private Drawable mSecondHand;
private Drawable mDial;
private int mDialWidth;
private int mDialHeight;
private float mSeconds;
private float mMinutes;
private float mHour;
Context mContext;
public MyAnalogClock(Context context) {
super(context);
}
public MyAnalogClock(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public MyAnalogClock(Context context, AttributeSet attrs,
int defStyle) {
super(context, attrs, defStyle);
Resources r = context.getResources();
TypedArray a =
context.obtainStyledAttributes(
attrs, R.styleable.AnalogClock, defStyle, 0);
mContext=context;
// mDial = a.getDrawable(com.android.internal.R.styleable.AnalogClock_dial);
// if (mDial == null) {
mDial = r.getDrawable(R.drawable.clock_dial);
// }
// mHourHand = a.getDrawable(com.android.internal.R.styleable.AnalogClock_hand_hour);
// if (mHourHand == null) {
mHourHand = r.getDrawable(R.drawable.clock_hour);
// }
// mMinuteHand = a.getDrawable(com.android.internal.R.styleable.AnalogClock_hand_minute);
// if (mMinuteHand == null) {
mMinuteHand = r.getDrawable(R.drawable.clock_minute);
mSecondHand = r.getDrawable(R.drawable.clockgoog_minute);
// }
mDialWidth = mDial.getIntrinsicWidth();
mDialHeight = mDial.getIntrinsicHeight();
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
int widthMode = MeasureSpec.getMode(widthMeasureSpec);
int widthSize = MeasureSpec.getSize(widthMeasureSpec);
int heightMode = MeasureSpec.getMode(heightMeasureSpec);
int heightSize = MeasureSpec.getSize(heightMeasureSpec);
float hScale = 1.0f;
float vScale = 1.0f;
if (widthMode != MeasureSpec.UNSPECIFIED && widthSize < mDialWidth) {
hScale = (float) widthSize / (float) mDialWidth;
}
if (heightMode != MeasureSpec.UNSPECIFIED && heightSize < mDialHeight) {
vScale = (float )heightSize / (float) mDialHeight;
}
float scale = Math.min(hScale, vScale);
setMeasuredDimension(resolveSize((int) (mDialWidth * scale), widthMeasureSpec),
resolveSize((int) (mDialHeight * scale), heightMeasureSpec));
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
//Here you can set the size of your clock
int availableWidth = 70;
int availableHeight = 70;
//Actual size
int x = availableWidth / 2;
int y = availableHeight / 2;
final Drawable dial = mDial;
int w = dial.getIntrinsicWidth();
int h = dial.getIntrinsicHeight();
boolean scaled = false;
if (availableWidth < w || availableHeight < h) {
scaled = true;
float scale = Math.min((float) availableWidth / (float) w,
(float) availableHeight / (float) h);
canvas.save();
canvas.scale(scale, scale, x, y);
}
dial.setBounds(x - (w / 2), y - (h / 2), x + (w / 2), y + (h / 2));
dial.draw(canvas);
canvas.save();
canvas.rotate(mHour / 12.0f * 360.0f, x, y);
w = mHourHand.getIntrinsicWidth();
h = mHourHand.getIntrinsicHeight();
mHourHand.setBounds(x - (w / 2), y - (h / 2), x + (w / 2), y + (h / 2));
mHourHand.draw(canvas);
canvas.restore();
canvas.save();
canvas.rotate(mMinutes / 60.0f * 360.0f, x, y);
w = mMinuteHand.getIntrinsicWidth();
h = mMinuteHand.getIntrinsicHeight();
mMinuteHand.setBounds(x - (w / 2), y - (h / 2), x + (w / 2), y + (h / 2));
mMinuteHand.draw(canvas);
canvas.restore();
canvas.save();
canvas.rotate(mSeconds, x, y);
w = mSecondHand.getIntrinsicWidth();
h = mSecondHand.getIntrinsicHeight();
mSecondHand.setBounds(x - (w / 2), y - (h / 2), x + (w / 2), y + (h / 2));
mSecondHand.draw(canvas);
canvas.restore();
if (scaled) {
canvas.restore();
}
}
public void setTime(int hours, int minutes, int seconds)
{
mSeconds = 6.0f*seconds;
mMinutes = minutes + seconds / 60.0f;
mHour = hours + mMinutes / 60.0f;
}
}
您还应该在 drawable 文件夹中放置 4 个可绘制文件，并使用以下代码在 values 文件夹中创建(或更新)attrs 文件:
You should also put 4 drawable files in the drawable folder and create (or update) the attrs file in values folder with the following code:
<?xml version="1.0" encoding="UTF-8"?>
<resources>
<declare-styleable name="AnalogClock">
<attr name="dial" format="reference"/>
<attr name="hand_hour" format="reference"/>
<attr name="hand_minute" format="reference"/>
</declare-styleable>
</resources>
这篇关于使用来自其原始类的自定义 android AnalogClock 设置时间的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！