如何在android中的工具栏图标中显示通知计数

Question

我想像购物车一样为Android制作一个图标计数器.我看到很多电子商务应用购物车图标数量增加.我展示了flipkart app snapshot.:-

Answer 1

在我的解决方案中,每当新通知到达时,计数器将增加(在购物应用程序中观察到)

试试这个,它适用于我的MOTO e2.

确保您的API级别> 14

创建如下布局:

</RelativeLayout>
    <ImageView
        android:id="@+id/counterBackground"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:background="@drawable/unread_background" />

    <TextView
        android:id="@+id/count"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="1"
        android:textSize="8sp"
        android:layout_centerInParent="true"
        android:textColor="#FFFFFF" />
</RelativeLayout>

在onCreateOptionMenu,

@Override
public boolean onCreateOptionsMenu(Menu menu) {
   getMenuInflater().inflate(R.menu.menu_main, menu);

   MenuItem menuItem = menu.findItem(R.id.testAction);
   menuItem.setIcon(buildCounterDrawable(count,  R.drawable.ic_menu_gallery));

   return true;
}

现在,为Icon构建方法:

private Drawable buildCounterDrawable(int count, int backgroundImageId) {
    LayoutInflater inflater = LayoutInflater.from(this);
    View view = inflater.inflate(R.layout.counter_menuitem_layout, null);
    view.setBackgroundResource(backgroundImageId);

    if (count == 0) {
        View counterTextPanel = view.findViewById(R.id.counterValuePanel);
        counterTextPanel.setVisibility(View.GONE);
    } else {
        TextView textView = (TextView) view.findViewById(R.id.count);
        textView.setText("" + count);
    }

    view.measure(View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED),
            View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED));
    view.layout(0, 0, view.getMeasuredWidth(), view.getMeasuredHeight());

    view.setDrawingCacheEnabled(true);
    view.setDrawingCacheQuality(View.DRAWING_CACHE_QUALITY_HIGH);
    Bitmap bitmap = Bitmap.createBitmap(view.getDrawingCache());
    view.setDrawingCacheEnabled(false);

    return new BitmapDrawable(getResources(), bitmap);
}

你可以参考这里

Answer 2

只需更改 android:actionLayout="@layout/feed_update_count" 为 app:actionLayout="@layout/feed_update_count". 它会工作