如何在Android应用中添加一个桌面未读角标功能
这期内容当中小编将会给大家带来有关如何在Android应用中添加一个桌面未读角标功能，文章内容丰富且以专业的角度为大家分析和叙述，阅读完这篇文章希望大家可以有所收获。
公司主营业务：成都做网站、成都网站建设、移动网站开发等业务。帮助企业客户真正实现互联网宣传，提高企业的竞争能力。创新互联建站是一支青春激扬、勤奋敬业、活力青春激扬、勤奋敬业、活力澎湃、和谐高效的团队。公司秉承以“开放、自由、严谨、自律”为核心的企业文化，感谢他们对我们的高要求，感谢他们从不同领域给我们带来的挑战，让我们激情的团队有机会用头脑与智慧不断的给客户带来惊喜。创新互联建站推出交口免费做网站回馈大家。
1.原生系统（原生的Launcher ）,只能修改快捷方式，增加和删除都会有toast提示
2.小米 三星 索尼 手机: 自定义的launcher: 发送显示未读消息数的action已经不同了。具体可以去看代码。。。
判断手机的代码：
/***
* 在应用图标的快捷方式上加数字
* @param clazz 启动的activity
* @param isShowNum 是否显示数字
* @param num 显示的数字：整型
* @param isStroke 是否加上边框
*
*/
public static void addNumShortCut(Context context,Class<?> clazz,boolean isShowNum, String num, boolean isStroke)
{
Log.e(TAG, "manufacturer="+Build.MANUFACTURER);
if (Build.MANUFACTURER.equalsIgnoreCase("Xiaomi")){
//小米
xiaoMiShortCut(context, clazz, num);
}else if(Build.MANUFACTURER.equalsIgnoreCase("samsung")){
//三星
samsungShortCut(context, num);
}else {//其他原生系统手机
installRawShortCut(context, MainActivity.class, isShowNum, num, isStroke);
}
}下面写好的工具类，上面的方法也在其中。
/***
* 应用的快捷方式工具类
*
* @author yang
*
*/
public class AppShortCutUtil {
private static final String TAG = "AppShortCutUtil";
//默认圆角半径
private static final int DEFAULT_CORNER_RADIUS_DIP = 8;
//默认边框宽度
private static final int DEFAULT_STROKE_WIDTH_DIP = 2;
//边框的颜色
private static final int DEFAULT_STROKE_COLOR = Color.WHITE;
//中间数字的颜色
private static final int DEFAULT_NUM_COLOR = Color.parseColor("#CCFF0000");
/***
*
* 生成有数字的图片(没有边框)
* @param context
* @param icon 图片
* @param isShowNum 是否要绘制数字
* @param num 数字字符串：整型数字 超过99，显示为"99+"
* @return
*/
public static Bitmap generatorNumIcon(Context context, Bitmap icon, boolean isShowNum, String num) {
DisplayMetrics dm = context.getResources().getDisplayMetrics();
//基准屏幕密度
float baseDensity = 1.5f;//240dpi
float factor = dm.density/baseDensity;
Log.e(TAG, "density:"+dm.density);
Log.e(TAG, "dpi:"+dm.densityDpi);
Log.e(TAG, "factor:"+factor);
// 初始化画布
int iconSize = (int) context.getResources().getDimension(android.R.dimen.app_icon_size);
Bitmap numIcon = Bitmap.createBitmap(iconSize, iconSize, Config.ARGB_8888);
Canvas canvas = new Canvas(numIcon);
// 拷贝图片
Paint iconPaint = new Paint();
iconPaint.setDither(true);// 防抖动
iconPaint.setFilterBitmap(true);// 用来对Bitmap进行滤波处理，这样，当你选择Drawable时，会有抗锯齿的效果
Rect src = new Rect(0, 0, icon.getWidth(), icon.getHeight());
Rect dst = new Rect(0, 0, iconSize, iconSize);
canvas.drawBitmap(icon, src, dst, iconPaint);
if(isShowNum){
if(TextUtils.isEmpty(num)){
num = "0";
}
if(!TextUtils.isDigitsOnly(num)){
//非数字
Log.e(TAG, "the num is not digit :"+ num);
num = "0";
}
int numInt = Integer.valueOf(num);
if(numInt > 99){//超过99
num = "99+";
// 启用抗锯齿和使用设备的文本字体大小
Paint numPaint = new Paint(Paint.ANTI_ALIAS_FLAG | Paint.DEV_KERN_TEXT_FLAG);
numPaint.setColor(Color.WHITE);
numPaint.setTextSize(20f*factor);
numPaint.setTypeface(Typeface.DEFAULT_BOLD);
int textWidth=(int)numPaint.measureText(num, 0, num.length());
Log.e(TAG, "text width:"+textWidth);
int circleCenter = (int) (15*factor);//中心坐标
int circleRadius = (int) (13*factor);//圆的半径
//绘制左边的圆形
Paint leftCirPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
leftCirPaint.setColor(Color.RED);
canvas.drawCircle(iconSize-circleRadius-textWidth+(10*factor), circleCenter, circleRadius, leftCirPaint);
//绘制右边的圆形
Paint rightCirPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
rightCirPaint.setColor(Color.RED);
canvas.drawCircle(iconSize-circleRadius, circleCenter, circleRadius, rightCirPaint);
//绘制中间的距形
Paint rectPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
rectPaint.setColor(Color.RED);
RectF oval = new RectF(iconSize-circleRadius-textWidth+(10*factor), 2*factor, iconSize-circleRadius, circleRadius*2+2*factor);
canvas.drawRect(oval, rectPaint);
//绘制数字
canvas.drawText(num, (float)(iconSize-textWidth/2-(24*factor)), 23*factor, numPaint);
}else{//<=99
// 启用抗锯齿和使用设备的文本字体大小
Paint numPaint = new Paint(Paint.ANTI_ALIAS_FLAG | Paint.DEV_KERN_TEXT_FLAG);
numPaint.setColor(Color.WHITE);
numPaint.setTextSize(20f*factor);
numPaint.setTypeface(Typeface.DEFAULT_BOLD);
int textWidth=(int)numPaint.measureText(num, 0, num.length());
Log.e(TAG, "text width:"+textWidth);
//绘制外面的圆形
//Paint outCirPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
//outCirPaint.setColor(Color.WHITE);
//canvas.drawCircle(iconSize - 15, 15, 15, outCirPaint);
//绘制内部的圆形
Paint inCirPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
inCirPaint.setColor(Color.RED);
canvas.drawCircle(iconSize-15*factor, 15*factor, 15*factor, inCirPaint);
//绘制数字
canvas.drawText(num, (float)(iconSize-textWidth/2-15*factor), 22*factor, numPaint);
}
}
return numIcon;
}
/***
*
* 生成有数字的图片(没有边框)
* @param context
* @param icon 图片
* @param isShowNum 是否要绘制数字
* @param num 数字字符串：整型数字 超过99，显示为"99+"
* @return
*/
public static Bitmap generatorNumIcon2(Context context, Bitmap icon, boolean isShowNum, String num) {
DisplayMetrics dm = context.getResources().getDisplayMetrics();
//基准屏幕密度
float baseDensity = 1.5f;//240dpi
float factor = dm.density/baseDensity;
Log.e(TAG, "density:"+dm.density);
Log.e(TAG, "dpi:"+dm.densityDpi);
Log.e(TAG, "factor:"+factor);
// 初始化画布
int iconSize = (int) context.getResources().getDimension(android.R.dimen.app_icon_size);
Bitmap numIcon = Bitmap.createBitmap(iconSize, iconSize, Config.ARGB_8888);
Canvas canvas = new Canvas(numIcon);
// 拷贝图片
Paint iconPaint = new Paint();
iconPaint.setDither(true);// 防抖动
iconPaint.setFilterBitmap(true);// 用来对Bitmap进行滤波处理，这样，当你选择Drawable时，会有抗锯齿的效果
Rect src = new Rect(0, 0, icon.getWidth(), icon.getHeight());
Rect dst = new Rect(0, 0, iconSize, iconSize);
canvas.drawBitmap(icon, src, dst, iconPaint);
if(isShowNum){
if(TextUtils.isEmpty(num)){
num = "0";
}
if(!TextUtils.isDigitsOnly(num)){
//非数字
Log.e(TAG, "the num is not digit :"+ num);
num = "0";
}
int numInt = Integer.valueOf(num);
if(numInt > 99){//超过99
num = "99+";
}
//启用抗锯齿和使用设备的文本字体大小
//测量文本占用的宽度
Paint numPaint = new Paint(Paint.ANTI_ALIAS_FLAG | Paint.DEV_KERN_TEXT_FLAG);
numPaint.setColor(Color.WHITE);
numPaint.setTextSize(20f*factor);
numPaint.setTypeface(Typeface.DEFAULT_BOLD);
int textWidth=(int)numPaint.measureText(num, 0, num.length());
Log.e(TAG, "text width:"+textWidth);
/**----------------------------------*
* TODO 绘制圆角矩形背景 start
*------------------------------------*/
//圆角矩形背景的宽度
int backgroundHeight = (int) (2*15*factor);
int backgroundWidth = textWidth>backgroundHeight ? (int)(textWidth+10*factor) : backgroundHeight;
canvas.save();//保存状态
ShapeDrawable drawable = getDefaultBackground(context);
drawable.setIntrinsicHeight(backgroundHeight);
drawable.setIntrinsicWidth(backgroundWidth);
drawable.setBounds(0, 0, backgroundWidth, backgroundHeight);
canvas.translate(iconSize-backgroundWidth, 0);
drawable.draw(canvas);
canvas.restore();//重置为之前保存的状态
/**----------------------------------*
* TODO 绘制圆角矩形背景 end
*------------------------------------*/
//绘制数字
canvas.drawText(num, (float)(iconSize-(backgroundWidth + textWidth)/2), 22*factor, numPaint);
}
return numIcon;
}
/***
*
* 生成有数字的图片(有边框)
* @param context
* @param icon 图片
* @param isShowNum 是否要绘制数字
* @param num 数字字符串：整型数字 超过99，显示为"99+"
* @return
*/
public static Bitmap generatorNumIcon3(Context context, Bitmap icon, boolean isShowNum, String num) {
DisplayMetrics dm = context.getResources().getDisplayMetrics();
//基准屏幕密度
float baseDensity = 1.5f;//240dpi
float factor = dm.density/baseDensity;
Log.e(TAG, "density:"+dm.density);
Log.e(TAG, "dpi:"+dm.densityDpi);
Log.e(TAG, "factor:"+factor);
// 初始化画布
int iconSize = (int) context.getResources().getDimension(android.R.dimen.app_icon_size);
Bitmap numIcon = Bitmap.createBitmap(iconSize, iconSize, Config.ARGB_8888);
Canvas canvas = new Canvas(numIcon);
// 拷贝图片
Paint iconPaint = new Paint();
iconPaint.setDither(true);// 防抖动
iconPaint.setFilterBitmap(true);// 用来对Bitmap进行滤波处理，这样，当你选择Drawable时，会有抗锯齿的效果
Rect src = new Rect(0, 0, icon.getWidth(), icon.getHeight());
Rect dst = new Rect(0, 0, iconSize, iconSize);
canvas.drawBitmap(icon, src, dst, iconPaint);
if(isShowNum){
if(TextUtils.isEmpty(num)){
num = "0";
}
if(!TextUtils.isDigitsOnly(num)){
//非数字
Log.e(TAG, "the num is not digit :"+ num);
num = "0";
}
int numInt = Integer.valueOf(num);
if(numInt > 99){//超过99
num = "99+";
}
//启用抗锯齿和使用设备的文本字体大小
//测量文本占用的宽度
Paint numPaint = new Paint(Paint.ANTI_ALIAS_FLAG | Paint.DEV_KERN_TEXT_FLAG);
numPaint.setColor(Color.WHITE);
numPaint.setTextSize(20f*factor);
numPaint.setTypeface(Typeface.DEFAULT_BOLD);
int textWidth=(int)numPaint.measureText(num, 0, num.length());
Log.e(TAG, "text width:"+textWidth);
/**----------------------------------*
* TODO 绘制圆角矩形背景：先画边框，再画内部的圆角矩形 start
*------------------------------------*/
//圆角矩形背景的宽度
int backgroundHeight = (int) (2*15*factor);
int backgroundWidth = textWidth>backgroundHeight ? (int)(textWidth+10*factor) : backgroundHeight;
//边框的宽度
int strokeThickness = (int) (2*factor);
canvas.save();//保存状态
int strokeHeight = backgroundHeight + strokeThickness*2;
int strokeWidth = textWidth>strokeHeight ? (int)(textWidth+ 10*factor + 2*strokeThickness) : strokeHeight;
ShapeDrawable outStroke = getDefaultStrokeDrawable(context);
outStroke.setIntrinsicHeight(strokeHeight);
outStroke.setIntrinsicWidth(strokeWidth);
outStroke.setBounds(0, 0, strokeWidth, strokeHeight);
canvas.translate(iconSize-strokeWidth-strokeThickness, strokeThickness);
outStroke.draw(canvas);
canvas.restore();//重置为之前保存的状态
canvas.save();//保存状态
ShapeDrawable drawable = getDefaultBackground(context);
drawable.setIntrinsicHeight((int) (backgroundHeight+2*factor));
drawable.setIntrinsicWidth((int) (backgroundWidth+2*factor));
drawable.setBounds(0, 0, backgroundWidth, backgroundHeight);
canvas.translate(iconSize-backgroundWidth-2*strokeThickness, 2*strokeThickness);
drawable.draw(canvas);
canvas.restore();//重置为之前保存的状态
/**----------------------------------*
* TODO 绘制圆角矩形背景 end
*------------------------------------*/
//绘制数字
canvas.drawText(num, (float)(iconSize-(backgroundWidth + textWidth+4*strokeThickness)/2), (22)*factor+2*strokeThickness, numPaint);
}
return numIcon;
}
/***
*
* 生成有数字的图片(有边框的)
* @param context
* @param icon 图片
* @param isShowNum 是否要绘制数字
* @param num 数字字符串：整型数字 超过99，显示为"99+"
* @return
*/
public static Bitmap generatorNumIcon4(Context context, Bitmap icon, boolean isShowNum, String num) {
DisplayMetrics dm = context.getResources().getDisplayMetrics();
//基准屏幕密度
float baseDensity = 1.5f;//240dpi
float factor = dm.density/baseDensity;
Log.e(TAG, "density:"+dm.density);
Log.e(TAG, "dpi:"+dm.densityDpi);
Log.e(TAG, "factor:"+factor);
// 初始化画布
int iconSize = (int) context.getResources().getDimension(android.R.dimen.app_icon_size);
Bitmap numIcon = Bitmap.createBitmap(iconSize, iconSize, Config.ARGB_8888);
Canvas canvas = new Canvas(numIcon);
// 拷贝图片
Paint iconPaint = new Paint();
iconPaint.setDither(true);// 防抖处理
iconPaint.setFilterBitmap(true);// 用来对Bitmap进行滤波处理，这样，当你选择Drawable时，会有抗锯齿的效果
Rect src = new Rect(0, 0, icon.getWidth(), icon.getHeight());
Rect dst = new Rect(0, 0, iconSize, iconSize);
canvas.drawBitmap(icon, src, dst, iconPaint);
if(isShowNum){
if(TextUtils.isEmpty(num)){
num = "0";
}
if(!TextUtils.isDigitsOnly(num)){
//非数字
Log.e(TAG, "the num is not digit :"+ num);
num = "0";
}
int numInt = Integer.valueOf(num);
if(numInt > 99){//超过99
num = "99+";
}
//启用抗锯齿和使用设备的文本字体
//测量文本占用的宽度
Paint numPaint = new Paint(Paint.ANTI_ALIAS_FLAG | Paint.DEV_KERN_TEXT_FLAG);
numPaint.setColor(Color.WHITE);
numPaint.setTextSize(25f*factor);
numPaint.setTypeface(Typeface.DEFAULT_BOLD);
int textWidth=(int)numPaint.measureText(num, 0, num.length());
Log.e(TAG, "text width:"+textWidth);
/**----------------------------------*
* TODO 绘制圆角矩形背景 start
*------------------------------------*/
//边框的宽度
int strokeThickness = (int) (DEFAULT_STROKE_WIDTH_DIP*factor);
//圆角矩形背景的宽度
float radiusPx = 15*factor;
int backgroundHeight = (int) (2*(radiusPx+strokeThickness));//2*(半径+边框宽度)
int backgroundWidth = textWidth>backgroundHeight ? (int)(textWidth + 10*factor + 2*strokeThickness) : backgroundHeight;
canvas.save();//保存状态
ShapeDrawable drawable = getDefaultBackground2(context);
drawable.setIntrinsicHeight(backgroundHeight);
drawable.setIntrinsicWidth(backgroundWidth);
drawable.setBounds(0, 0, backgroundWidth, backgroundHeight);
canvas.translate(iconSize-backgroundWidth-strokeThickness, 2*strokeThickness);
drawable.draw(canvas);
canvas.restore();//重置为之前保存的状态
/**----------------------------------*
* TODO 绘制圆角矩形背景 end
*------------------------------------*/
//绘制数字
canvas.drawText(num, (float)(iconSize-(backgroundWidth + textWidth+2*strokeThickness)/2), (float) (25*factor+2.5*strokeThickness), numPaint);
}
return numIcon;
}
/***
* 创建原生系统的快捷方式
* @param context
* @param clazz 启动的activity
* @param isShowNum 是否显示数字
* @param num 显示的数字：整型
* @param isStroke 是否加上边框
*/
public static void installRawShortCut(Context context, Class<?> clazz, boolean isShowNum, String num, boolean isStroke) {
Log.e(TAG, "installShortCut....");
Intent shortcutIntent = new Intent( "com.android.launcher.action.INSTALL_SHORTCUT");
//名称
shortcutIntent.putExtra(Intent.EXTRA_SHORTCUT_NAME, context.getString(R.string.app_name));
// 是否可以有多个快捷方式的副本，参数如果是true就可以生成多个快捷方式，如果是false就不会重复添加
shortcutIntent.putExtra("duplicate", false);
//点击快捷方式：打开activity
Intent mainIntent = new Intent(Intent.ACTION_MAIN);
mainIntent.addCategory(Intent.CATEGORY_LAUNCHER);
mainIntent.setClass(context, clazz);
shortcutIntent.putExtra(Intent.EXTRA_SHORTCUT_INTENT, mainIntent);
//快捷方式的图标
if(isStroke){
shortcutIntent.putExtra(Intent.EXTRA_SHORTCUT_ICON,
generatorNumIcon4(
context,
((BitmapDrawable)context.getResources().getDrawable(R.drawable.ic_launcher)).getBitmap(),
isShowNum,
num));
}else{
shortcutIntent.putExtra(Intent.EXTRA_SHORTCUT_ICON,
generatorNumIcon2(
context,
((BitmapDrawable)context.getResources().getDrawable(R.drawable.ic_launcher)).getBitmap(),
isShowNum,
num));
}
context.sendBroadcast(shortcutIntent);
}
/***
* 是否已经创建了快捷方式
* @param context
* @return
*/
public static boolean isAddShortCut(Context context) {
Log.e(TAG, "isAddShortCut....");
boolean isInstallShortcut = false;
final ContentResolver cr = context.getContentResolver();
//TODO 注释的代码，在有的手机：修改了ROM的系统，不能支持
/*int versionLevel = android.os.Build.VERSION.SDK_INT;
String AUTHORITY = "com.android.launcher2.settings";
//2.2以上的系统的文件文件名字是不一样的
if (versionLevel >= 8) {
AUTHORITY = "com.android.launcher2.settings";
} else {
AUTHORITY = "com.android.launcher.settings";
}*/
String AUTHORITY = getAuthorityFromPermission(context, "com.android.launcher.permission.READ_SETTINGS");
Log.e(TAG, "AUTHORITY : " +AUTHORITY);
final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY
+ "/favorites?notify=true");
Cursor c = cr.query(CONTENT_URI,
new String[] { "title" }, "title=?",
new String[] { context.getString(R.string.app_name) }, null);
if (c != null && c.getCount() > 0) {
isInstallShortcut = true;
}
if(c != null){
c.close();
}
Log.e(TAG, "isAddShortCut....isInstallShortcut="+isInstallShortcut);
return isInstallShortcut;
}
/**
* 删除快捷方式
* @param context
* @param clazz
*/
public static void deleteShortCut(Context context, Class<?> clazz){
Log.e(TAG, "delShortcut....");
if (Build.MANUFACTURER.equalsIgnoreCase("Xiaomi")){
//小米
//当为""时，不显示数字，相当于隐藏了)
xiaoMiShortCut(context, clazz, "");
}else if(Build.MANUFACTURER.equalsIgnoreCase("samsung")){
//三星
samsungShortCut(context, "0");
}else {//其他原生系统手机
//删除显示数字的快捷方式
deleteRawShortCut(context, clazz);
//安装不显示数字的快捷方式
//installRawShortCut(context, clazz, false, "0");
}
}
/***
* 删除原生系统的快捷方式
* @param context
* @param clazz 启动的activity
*/
public static void deleteRawShortCut(Context context, Class<?> clazz) {
Intent intent = new Intent("com.android.launcher.action.UNINSTALL_SHORTCUT");
//快捷方式的名称
intent.putExtra(Intent.EXTRA_SHORTCUT_NAME, context.getString(R.string.app_name));
Intent intent2 = new Intent();
intent2.setClass(context, clazz);
intent2.setAction(Intent.ACTION_MAIN);
intent2.addCategory(Intent.CATEGORY_LAUNCHER);
intent.putExtra(Intent.EXTRA_SHORTCUT_INTENT,intent2);
context.sendBroadcast(intent);
}
/***
* 取得权限相应的认证URI
* @param context
* @param permission
* @return
*/
public static String getAuthorityFromPermission(Context context, String permission) {
if (TextUtils.isEmpty(permission)) {
return null;
}
List packInfos = context.getPackageManager().getInstalledPackages(PackageManager.GET_PROVIDERS);
if (packInfos == null) {
return null;
}
for (PackageInfo info : packInfos) {
ProviderInfo[] providers = info.providers;
if (providers != null) {
for (ProviderInfo provider : providers) {
if (permission.equals(provider.readPermission)
|| permission.equals(provider.writePermission)) {
return provider.authority;
}
}
}
}
return null;
}
/***
* 在小米应用图标的快捷方式上加数字
*
*
* @param context
* @param num 显示的数字：大于99，为"99"，当为""时，不显示数字，相当于隐藏了)
*
* 注意点：
* context.getPackageName()+"/."+clazz.getSimpleName() （这个是启动activity的路径）中的"/."不能缺少
*
*/
public static void xiaoMiShortCut(Context context,Class<?> clazz, String num)
{
Log.e(TAG, "xiaoMiShortCut....");
Intent localIntent = new Intent("android.intent.action.APPLICATION_MESSAGE_UPDATE");
localIntent.putExtra("android.intent.extra.update_application_component_name", context.getPackageName()+"/."+clazz.getSimpleName());
if(TextUtils.isEmpty(num)){
num = "";
}else{
int numInt = Integer.valueOf(num);
if (numInt > 0){
if (numInt > 99){
num = "99";
}
}else{
num = "0";
}
}
localIntent.putExtra("android.intent.extra.update_application_message_text", num);
context.sendBroadcast(localIntent);
}
/***
* 索尼手机：应用图标的快捷方式上加数字
* @param context
* @param num
*/
public static void sonyShortCut(Context context, String num)
{
String activityName = getLaunchActivityName(context);
if (activityName == null){
return;
}
Intent localIntent = new Intent();
int numInt = Integer.valueOf(num);
boolean isShow = true;
if (numInt < 1){
num = "";
isShow = false;
}else if (numInt > 99){
num = "99";
}
localIntent.putExtra("com.sonyericsson.home.intent.extra.badge.SHOW_MESSAGE", isShow);
localIntent.setAction("com.sonyericsson.home.action.UPDATE_BADGE");
localIntent.putExtra("com.sonyericsson.home.intent.extra.badge.ACTIVITY_NAME", activityName);
localIntent.putExtra("com.sonyericsson.home.intent.extra.badge.MESSAGE", num);
localIntent.putExtra("com.sonyericsson.home.intent.extra.badge.PACKAGE_NAME", context.getPackageName());
context.sendBroadcast(localIntent);
}
/***
* 三星手机：应用图标的快捷方式上加数字
* @param context
* @param num
*/
public static void samsungShortCut(Context context, String num)
{
int numInt = Integer.valueOf(num);
if (numInt < 1)
{
num = "0";
}else if (numInt > 99){
num = "99";
}
String activityName = getLaunchActivityName(context);
Intent localIntent = new Intent("android.intent.action.BADGE_COUNT_UPDATE");
localIntent.putExtra("badge_count", num);
localIntent.putExtra("badge_count_package_name", context.getPackageName());
localIntent.putExtra("badge_count_class_name", activityName);
context.sendBroadcast(localIntent);
}
/***
* 在应用图标的快捷方式上加数字
* @param clazz 启动的activity
* @param isShowNum 是否显示数字
* @param num 显示的数字：整型
* @param isStroke 是否加上边框
*
*/
public static void addNumShortCut(Context context,Class<?> clazz,boolean isShowNum, String num, boolean isStroke)
{
Log.e(TAG, "manufacturer="+Build.MANUFACTURER);
if (Build.MANUFACTURER.equalsIgnoreCase("Xiaomi")){
//小米
xiaoMiShortCut(context, clazz, num);
}else if(Build.MANUFACTURER.equalsIgnoreCase("samsung")){
//三星
samsungShortCut(context, num);
}else {//其他原生系统手机
installRawShortCut(context, MainActivity.class, isShowNum, num, isStroke);
}
}
/***
* 取得当前应用的启动activity的名称：
* mainfest.xml中配置的 android:name:"
* @param context
* @return
*/
public static String getLaunchActivityName(Context context)
{
PackageManager localPackageManager = context.getPackageManager();
Intent localIntent = new Intent("android.intent.action.MAIN");
localIntent.addCategory("android.intent.category.LAUNCHER");
try
{
Iterator localIterator = localPackageManager.queryIntentActivities(localIntent, 0).iterator();
while (localIterator.hasNext())
{
ResolveInfo localResolveInfo = localIterator.next();
if (!localResolveInfo.activityInfo.applicationInfo.packageName.equalsIgnoreCase(context.getPackageName()))
continue;
String str = localResolveInfo.activityInfo.name;
return str;
}
}
catch (Exception localException)
{
return null;
}
return null;
}
/***
* 得到一个默认的背景：圆角矩形
* 使用代码来生成一个背景：相当于用的xml的背景
*
* @return
*/
private static ShapeDrawable getDefaultBackground(Context context) {
//这个是为了应对不同分辨率的手机，屏幕兼容性
int r = dipToPixels(context,DEFAULT_CORNER_RADIUS_DIP);
float[] outerR = new float[] {r, r, r, r, r, r, r, r};
//圆角矩形
RoundRectShape rr = new RoundRectShape(outerR, null, null);
ShapeDrawable drawable = new ShapeDrawable(rr);
drawable.getPaint().setColor(DEFAULT_NUM_COLOR);//设置颜色
return drawable;
}
/***
* 得到一个默认的背景：圆角矩形
* 使用代码来生成一个背景：相当于用的xml的背景
*
* @return
*/
private static ShapeDrawable getDefaultBackground2(Context context) {
//这个是为了应对不同分辨率的手机，屏幕兼容性
int r = dipToPixels(context,DEFAULT_CORNER_RADIUS_DIP);
float[] outerR = new float[] {r, r, r, r, r, r, r, r};
int distance = dipToPixels(context,DEFAULT_STROKE_WIDTH_DIP);
//圆角矩形
RoundRectShape rr = new RoundRectShape(outerR, null, null);
customBorderDrawable drawable = new customBorderDrawable(context,rr);
drawable.getFillpaint().setColor(DEFAULT_NUM_COLOR);//设置填充颜色
drawable.getStrokepaint().setColor(DEFAULT_STROKE_COLOR);//设置边框颜色
drawable.getStrokepaint().setStrokeWidth(distance);//设置边框宽度
return drawable;
}
/***
* 得到一个默认的背景：圆角矩形
* 使用代码来生成一个背景：相当于用的xml的背景
*
* @return
*/
private static ShapeDrawable getDefaultStrokeDrawable(Context context) {
//这个是为了应对不同分辨率的手机，屏幕兼容性
int r = dipToPixels(context, DEFAULT_CORNER_RADIUS_DIP);
int distance = dipToPixels(context, DEFAULT_STROKE_WIDTH_DIP);
float[] outerR = new float[] {r, r, r, r, r, r, r, r};
//圆角矩形
RoundRectShape rr = new RoundRectShape(outerR, null, null);
ShapeDrawable drawable = new ShapeDrawable(rr);
drawable.getPaint().setStrokeWidth(distance);
drawable.getPaint().setStyle(Paint.Style.FILL);
drawable.getPaint().setColor(DEFAULT_STROKE_COLOR);//设置颜色
return drawable;
}
/***
* dp to px
* @param dip
* @return
*/
public static int dipToPixels(Context context, int dip) {
Resources r = context.getResources();
float px = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, dip, r.getDisplayMetrics());
return (int) px;
}
} 上述就是小编为大家分享的如何在Android应用中添加一个桌面未读角标功能了，如果刚好有类似的疑惑，不妨参照上述分析进行理解。如果想知道更多相关知识，欢迎关注创新互联行业资讯频道。
网站栏目：如何在Android应用中添加一个桌面未读角标功能
网页URL：http://pwwzsj.com/article/pgcjos.html
