For Creating badge:
BadgeDrawable.java
`package com.example.priyankam.customnotificationbadge;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.ColorFilter;
import android.graphics.Paint;
import android.graphics.Rect;
import android.graphics.Typeface;
import android.graphics.drawable.Drawable;
public class BadgeDrawable extends Drawable {
private float mTextSize;
private Paint mBadgePaint;
private Paint mTextPaint;
private Rect mTxtRect = new Rect();
private String mCount = "";
private boolean mWillDraw = false;
public BadgeDrawable(Context context) {
// mTextSize = 10dp;
mTextSize = context.getResources().getDimension(R.dimen.margin_ssmall);
mBadgePaint = new Paint();
mBadgePaint.setColor(Color.RED);
mBadgePaint.setAntiAlias(true);
mBadgePaint.setStyle(Paint.Style.FILL);
mTextPaint = new Paint();
mTextPaint.setColor(Color.WHITE);
mTextPaint.setTypeface(Typeface.DEFAULT_BOLD);
mTextPaint.setTextSize(mTextSize);
mTextPaint.setAntiAlias(true);
mTextPaint.setTextAlign(Paint.Align.CENTER);
}
@Override
public void draw(Canvas canvas) {
if (!mWillDraw) {
return;
}
Rect bounds = getBounds();
float width = bounds.right - bounds.left;
float height = bounds.bottom - bounds.top;
// Position the badge in the top-right quadrant of the icon.
float radius = ((Math.min(width, height) / 2) - 1) / (float) 1.6;
float centerX = width - radius - 1;
float centerY = radius + 1;
// Draw badge circle.
canvas.drawCircle(centerX, centerY, radius, mBadgePaint);
// Draw badge count text inside the circle.
mTextPaint.getTextBounds(mCount, 0, mCount.length(), mTxtRect);
float textHeight = mTxtRect.bottom - mTxtRect.top;
float textY = centerY + (textHeight / 2f);
canvas.drawText(mCount, centerX, textY, mTextPaint);
}
/*
Sets the count (i.e notifications) to display.
*/
public void setCount(int count) {
mCount = Integer.toString(count);
// Only draw a badge if there are notifications.
mWillDraw = count > 0;
invalidateSelf();
}
@Override
public void setAlpha(int alpha) {
// do nothing
}
@Override
public int getOpacity() {
// TODO Auto-generated method stub
return 0;
}
@Override
public void setColorFilter(ColorFilter cf) {
// TODO Auto-generated method stub
}
}`
menu.xml
`<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto">
<item
android:id="@+id/action_cart"
android:icon="@drawable/ic_menu_notifications"
android:title="notification"
app:showAsAction="always" />
</menu>`
** In MainActivity.java added following code **
`@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return super.onCreateOptionsMenu(menu);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
// Handle presses on the action bar items
switch (id) {
case R.id.action_cart:
GlobalClass.setAddToCart(context, item,numMessages);
invalidateOptionsMenu();
//This is the proper solution for Open Some Activity after clicking the action in notification
// Open InfoActivity Class on "Info" Button Click
Intent intentInfo = new Intent(this, InfoActivity.class);
// Send data to InfoActivity Class
intentInfo.putExtra("title", strTitle);
intentInfo.putExtra("text", strText);
startActivity(intentInfo);
numMessages=0;//clear notification count
invalidateOptionsMenu();
return true;
default:
onBackPressed();
return true;
}
}`
And also add the following code ,where you want to update the notification count:
`bcustomnotify.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
GlobalClass.setNotifyCount(numMessages);
// force the ActionBar to relayout its MenuItems.
// onCreateOptionsMenu(Menu) will be called again.
invalidateOptionsMenu();
}
});`
and also refresh the count onResume():
`@Override
protected void onResume() {
super.onResume();
// force the ActionBar to relayout its MenuItems.
// onCreateOptionsMenu(Menu) will be called again.
invalidateOptionsMenu();
}`
GlobalClass.java
`package com.example.priyankam.customnotificationbadge;
import android.app.Activity;
import android.content.Context;
import android.graphics.drawable.LayerDrawable;
import android.view.MenuItem;
public class GlobalClass extends Activity {
private static LayerDrawable icon;
public GlobalClass() {
//constructor
}
public static void setAddToCart(Context context, MenuItem item, int numMessages) {
icon = (LayerDrawable) item.getIcon();
SetNotificationCount.setBadgeCount(context, icon,GlobalClass.setNotifyCount(numMessages));
}
public static int setNotifyCount(int numMessages) {
int count=numMessages;
return count;
}
}`
SetNotificationCount.java
`package com.example.priyankam.customnotificationbadge;
import android.content.Context;
import android.graphics.drawable.Drawable;
import android.graphics.drawable.LayerDrawable;
public class SetNotificationCount {
public static void setBadgeCount(Context context, LayerDrawable icon, int count) {
BadgeDrawable badge;
// Reuse drawable if possible
Drawable reuse = icon.findDrawableByLayerId(R.id.ic_badge);
if (reuse != null && reuse instanceof BadgeDrawable) {
badge = (BadgeDrawable) reuse;
} else {
badge = new BadgeDrawable(context);
}
badge.setCount(count);
icon.mutate();
icon.setDrawableByLayerId(R.id.ic_badge, badge);
}
}`
