Android 8.1 Launcher3实现动态指针时钟功能

本文主要实现功能，可能有不合理的地方 首先创建一个实现功能的工具里，直接上代码： ? 1 2 3 4 5 6 7 0 Comments

本文主要实现功能，可能有不合理的地方

首先创建一个实现功能的工具里，直接上代码：

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import android.content.Context;

import android.graphics.Bitmap;

import android.os.Handler;

import android.os.Message;

import com.android.launcher3.ItemInfo;

import com.android.launcher3.LauncherSettings;

import com.android.launcher3.ShortcutInfo;

import com.android.launcher3.util.LogUtil;

public class DeskClockUtil {

private OnDeskClockIconChangeListener mListener;

private ItemInfo mItemInfo;

private boolean mIsResume;

private Handler mHandler = new Handler() {

@Override

public void handleMessage(Message msg) {

super.handleMessage(msg);

if (msg.what == 100) {

Message msg1 = new Message();

msg1.what = 100;

msg1.obj = msg.obj;

mHandler.sendMessageDelayed(msg1, 60000);

if (mListener != null && mItemInfo != null) {

mListener.onChange(IconUtil.getDeskClockIcon((Context) msg.obj), mItemInfo);

}

}

}

};

private static DeskClockUtil sInstance;

private DeskClockUtil() {

}

public static DeskClockUtil getInstance() {

if (sInstance == null) {

sInstance = new DeskClockUtil();

}

return sInstance;

}

private void refresh(Context context) {

if (mListener != null && mItemInfo != null) {

mListener.onChange(IconUtil.getDeskClockIcon(context), mItemInfo);

}

if (mHandler.hasMessages(100)) {

mHandler.removeMessages(100);

}

Message msg = new Message();

msg.what = 100;

msg.obj = context;

mHandler.sendMessageDelayed(msg,

1000 * (60 - Integer.parseInt(DateUtils.getCurrentSecond())));

}

public void onResume(Context context) {

mIsResume = true;

refresh(context);

}

public void onPause() {

mIsResume = false;

mHandler.removeMessages(100);

}

public void setListener(OnDeskClockIconChangeListener listener, ItemInfo info, Context context) {

if (!(info instanceof ShortcutInfo)) {

return;

}

String pkg = null;

if (info.getIntent() != null && info.getIntent().getComponent() != null) {

pkg = info.getIntent().getComponent().getPackageName();

}

if (!"com.android.deskclock".equals(pkg) || info.itemType == LauncherSettings.Favorites.ITEM_TYPE_DEEP_SHORTCUT) {

return;

}

mListener = listener;

mItemInfo = info;

if (mIsResume) {

refresh(context);

}

}

public interface OnDeskClockIconChangeListener {

void onChange(Bitmap icon, ItemInfo info);

}

}

画出动态时钟

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import android.content.Context;

import android.graphics.*;

import com.android.launcher3.R;

public class IconUtil {

private static final String TAG = "IconUtil";

private static Bitmap getBitmap(Context context, int res) {

BitmapFactory.Options options = new BitmapFactory.Options();

options.inPreferredConfig = Bitmap.Config.ARGB_4444;

return BitmapFactory.decodeResource(context.getResources(), res, options);

}

public static Bitmap getDeskClockIcon(Context context) {

// 添加一个带表盘的背景图

Bitmap empty = getBitmap(context, R.drawable.icon_time);

int x = empty.getWidth();

int y = empty.getHeight();

Bitmap deskClock = Bitmap.createBitmap(x, y, Bitmap.Config.ARGB_4444);

Canvas canvas = new Canvas(deskClock);

Paint paint = new Paint();

paint.setAntiAlias(true);

canvas.drawBitmap(empty, 0, 0, paint);

//设置圆角

paint.setStrokeCap(Paint.Cap.ROUND);

paint.setStrokeWidth(5);

paint.setColor(context.getResources().getColor(R.color.deskclock_time));

// 时针的长度

int radius = 35;

// 圆心的x y 坐标

int cx = x / 2;

int cy = y / 2;

int hour = Integer.parseInt(DateUtils.getCurrentHour());

int min = Integer.parseInt(DateUtils.getCurrentMin());

//时针的角度，这里是整点的角度。因为0°是从3点开始，所以这里减90°，从9点开始计算角度

int drgeeHour = hour * 30 - 90;

if (drgeeHour < 0) {

drgeeHour += 360;

}

// 加上时针在两个整点之间的角度，一分钟在分针上是6°，在时针上是min * 6 / 12

drgeeHour += min * 6 / 12;

//时针 针尖的x y坐标，相当于已知圆心坐标和半径，求圆上任意一点的坐标

int xHour = (int) (cx + radius * Math.cos(drgeeHour * 3.14 / 180));

int yHour = (int) (cy + radius * Math.sin(drgeeHour * 3.14 / 180));

canvas.drawLine(xHour, yHour, cx, cy, paint);

//分针的长度

radius = 45;

paint.setStrokeWidth(3);

paint.setColor(Color.RED);

//分针的角度

int drgeeMin = min * 6 - 90;

if (drgeeMin < 0) {

drgeeMin += 360;

}

//分针 针尖的x y坐标

int x1 = (int) (cx + radius * Math.cos(drgeeMin * Math.PI / 180));

int y1 = (int) (cy + radius * Math.sin(drgeeMin * Math.PI / 180));

canvas.drawLine(x1, y1, cx, cy, paint);

return deskClock;

}

}

时间工具类

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import java.text.SimpleDateFormat;

public class DateUtils {

public static String getCurrentDay() {

SimpleDateFormat format = new SimpleDateFormat("dd");

Long t = new Long(System.currentTimeMillis());

String d = format.format(t);

return d;

}

public static String getCurrentSecond() {

SimpleDateFormat format = new SimpleDateFormat("ss");

Long t = new Long(System.currentTimeMillis());

String d = format.format(t);

return d;

}

public static String getCurrentMin() {

SimpleDateFormat format = new SimpleDateFormat("mm");

Long t = new Long(System.currentTimeMillis());

String d = format.format(t);

return d;

}

public static String getCurrentHour() {

SimpleDateFormat format = new SimpleDateFormat("HH");

Long t = new Long(System.currentTimeMillis());

String d = format.format(t);

return d;

}

}

下面就比较简单了，我是在BubbleTextView.java中添加listener，我这里偷懒了，应该给时钟单独创建一个view，继承BubbleTextView。

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private void applyIconAndLabel(Bitmap icon, ItemInfo info) {

/* begin */

setDeskClockIcon(info);

/* end */

applyIcon(icon, info);

setText(info.title);

if (info.contentDescription != null) {

setContentDescription(info.isDisabled()

? getContext().getString(R.string.disabled_app_label, info.contentDescription)

: info.contentDescription);

}

}

private void setDeskClockIcon(ItemInfo info) {

DeskClockUtil.getInstance().setListener(new DeskClockUtil.OnDeskClockIconChangeListener() {

@Override

public void onChange(Bitmap icon, ItemInfo info) {

applyIcon(icon, info);

}

}, info, getContext());

}

private void applyIcon(Bitmap icon, ItemInfo info) {

FastBitmapDrawable iconDrawable = DrawableFactory.get(getContext()).newIcon(icon, info);

iconDrawable.setIsDisabled(info.isDisabled());

setIcon(iconDrawable);

}

在Launcher.java的onResume()和onPause()中分别开始和暂停

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@Override protected void onResume() {

......

/* begin */

DeskClockUtil.getInstance().onResume(this);

/* end */

if (mLauncherCallbacks != null) {

mLauncherCallbacks.onResume();

}

}

@Override

protected void onPause() {

// Ensure that items added to Launcher are queued until Launcher returns

InstallShortcutReceiver.enableInstallQueue(InstallShortcutReceiver.FLAG_ACTIVITY_PAUSED);

super.onPause();

mPaused = true;

mDragController.cancelDrag();

mDragController.resetLastGestureUpTime();

// We call onHide() aggressively. The custom content callbacks should be able to

// debounce excess onHide calls.

if (mWorkspace.getCustomContentCallbacks() != null) {

mWorkspace.getCustomContentCallbacks().onHide();

}

if (mLauncherCallbacks != null) {

mLauncherCallbacks.onPause();

}

/* begin */

DeskClockUtil.getInstance().onPause();

/* end */

}

这样就可以了，如果想要加秒针，在IconUtil中再把秒针画出来就行。
还有日历的动态图标也可以用同样的方法实现

总结

以上所述是小编给大家介绍的Android 8.1 Launcher3实现动态指针时钟功能，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对服务器之家网站的支持！

原文链接：https://blog.csdn.net/qq_30552095/article/details/81021625

本文链接：https://my.lmcjl.com/post/8069.html

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