android-数字提醒

		

	 

	我们在使用如短信类的软件是时会有未看短信数字的提醒，本人在论坛看到这个效果，就给大家分享一下：

	 

	 

	 

	 

	最重要的是BadgeView这个重写TextView的类：

	 

	import android.content.Context; 

	import android.content.res.Resources; 

	import android.graphics.Color; 

	import android.graphics.Typeface; 

	import android.graphics.drawable.ShapeDrawable; 

	import android.graphics.drawable.shapes.RoundRectShape; 

	import android.util.AttributeSet; 

	import android.util.TypedValue; 

	import android.view.Gravity; 

	import android.view.View; 

	import android.view.ViewGroup; 

	import android.view.ViewGroup.LayoutParams; 

	import android.view.ViewParent; 

	import android.view.animation.AccelerateInterpolator; 

	import android.view.animation.AlphaAnimation; 

	import android.view.animation.Animation; 

	import android.view.animation.DecelerateInterpolator; 

	import android.widget.FrameLayout; 

	import android.widget.TabWidget; 

	import android.widget.TextView; 

	 

	/**

	 * A simple text label view that can be applied as a "badge" to any given {@link android.view.View}. 

	 * This class is intended to be instantiated at runtime rather than included in XML layouts.

	 * 

	 * @author Jeff Gilfelt

	 */ 

	public class BadgeView extends TextView { 

	 

	    public static final int POSITION_TOP_LEFT = 1; 

	    public static final int POSITION_TOP_RIGHT = 2; 

	    public static final int POSITION_BOTTOM_LEFT = 3; 

	    public static final int POSITION_BOTTOM_RIGHT = 4; 

	     

	    private static final int DEFAULT_MARGIN_DIP = 5; 

	    private static final int DEFAULT_LR_PADDING_DIP = 5; 

	    private static final int DEFAULT_CORNER_RADIUS_DIP = 8; 

	    private static final int DEFAULT_POSITION = POSITION_TOP_RIGHT; 

	    private static final int DEFAULT_BADGE_COLOR = Color.RED; 

	    private static final int DEFAULT_TEXT_COLOR = Color.WHITE; 

	     

	    private static Animation fadeIn; 

	    private static Animation fadeOut; 

	     

	    private Context context; 

	    private View target; 

	     

	    private int badgePosition; 

	    private int badgeMargin; 

	    private int badgeColor; 

	     

	    private boolean isShown; 

	     

	    private ShapeDrawable badgeBg; 

	     

	    private int targetTabIndex; 

	     

	    public BadgeView(Context context) { 

	        this(context, (AttributeSet) null, android.R.attr.textViewStyle); 

	    } 

	     

	    public BadgeView(Context context, AttributeSet attrs) { 

	         this(context, attrs, android.R.attr.textViewStyle); 

	    } 

	     

	    /**

	     * Constructor -

	     * 

	     * create a new BadgeView instance attached to a target {@link android.view.View}.

	     *

	     * @param context context for this view.

	     * @param target the View to attach the badge to.

	     */ 

	    public BadgeView(Context context, View target) { 

	         this(context, null, android.R.attr.textViewStyle, target, 0); 

	    } 

	     

	    /**

	     * Constructor -

	     * 

	     * create a new BadgeView instance attached to a target {@link android.widget.TabWidget}

	     * tab at a given index.

	     *

	     * @param context context for this view.

	     * @param target the TabWidget to attach the badge to.

	     * @param index the position of the tab within the target.

	     */ 

	    public BadgeView(Context context, TabWidget target, int index) { 

	        this(context, null, android.R.attr.textViewStyle, target, index); 

	    } 

	     

	    public BadgeView(Context context, AttributeSet attrs, int defStyle) { 

	        this(context, attrs, defStyle, null, 0); 

	    } 

	     

	    public BadgeView(Context context, AttributeSet attrs, int defStyle, View target, int tabIndex) { 

	        super(context, attrs, defStyle); 

	        init(context, target, tabIndex); 

	    } 

	 

	    private void init(Context context, View target, int tabIndex) { 

	         

	        this.context = context; 

	        this.target = target; 

	        this.targetTabIndex = tabIndex; 

	         

	        // apply defaults 

	        badgePosition = DEFAULT_POSITION; 

	        badgeMargin = dipToPixels(DEFAULT_MARGIN_DIP); 

	        badgeColor = DEFAULT_BADGE_COLOR; 

	         

	        setTypeface(Typeface.DEFAULT_BOLD); 

	        int paddingPixels = dipToPixels(DEFAULT_LR_PADDING_DIP); 

	        setPadding(paddingPixels, 0, paddingPixels, 0); 

	        setTextColor(DEFAULT_TEXT_COLOR); 

	         

	        fadeIn = new AlphaAnimation(0, 1); 

	        fadeIn.setInterpolator(new DecelerateIn

补充：移动开发 , Android ,

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