android强迫症头像BadgeView

绝地灬酷狼 2022-08-03 08:45 142阅读 0赞

先看图片吧，需要用到的自己下载Demo，不需要的点右上角。

大多数的红点就是这两种，BadgeView是一个类文件，没有打成jar包，方便各位拓展。

[点我下载Demo][Demo]

![Center][]

第一种效果与第二种效果。

先复制 BadgeView类到你的包下，然后在需要使用的地方 new 出来，并设置相关属性。

BadgeView maintabbadgeView = new BadgeView(getApplicationContext(),
    				tvBadgeView);
    		maintabbadgeView.setBadgePosition(BadgeView.POSITION_TOP_RIGHT);
    		maintabbadgeView.setTextSize(1);
    		maintabbadgeView.setBackgroundResource(R.drawable.notificaitonpoint);
    		maintabbadgeView.show();
    
    		BadgeView maintabbadgeView1 = new BadgeView(getApplicationContext(),
    				tvBadgeView1);
    		maintabbadgeView1.setBadgePosition(BadgeView.POSITION_TOP_RIGHT);
    		maintabbadgeView1.setText("4");
    		maintabbadgeView1.show();

BadgeView类：

package com.example.badgeviewdemo;
    
    import android.content.Context;
    import android.content.res.Resources;
    import android.graphics.Color;
    import android.graphics.Typeface;
    import android.graphics.drawable.ShapeDrawable;
    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.
     * 
     */
    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_TOP_RIGHT2 = 7;
    	public static final int POSITION_BOTTOM_LEFT = 3;
    	public static final int POSITION_BOTTOM_RIGHT = 4;
    	public static final int POSITION_CENTER = 5;
    	public static final int POSITION = 6;
    
    	private static final int DEFAULT_MARGIN_DIP = 2;
    	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.parseColor("#CCFF0000"); //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 badgeMarginH;
    	private int badgeMarginV;
    	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;
    		badgeMarginH = dipToPixels(DEFAULT_MARGIN_DIP);
    		badgeMarginV = badgeMarginH;
    		badgeColor = DEFAULT_BADGE_COLOR;
    
    		setTypeface(Typeface.DEFAULT);
    		
    		setTextSize(15);
    		setTextColor(DEFAULT_TEXT_COLOR);
    		setBackgroundResource(R.drawable.bg1);
    		setGravity(Gravity.CENTER);
    		setPadding(1, 1, 1, 1);
    		fadeIn = new AlphaAnimation(0, 1);
    		fadeIn.setInterpolator(new DecelerateInterpolator());
    		fadeIn.setDuration(200);
    
    		fadeOut = new AlphaAnimation(1, 0);
    		fadeOut.setInterpolator(new AccelerateInterpolator());
    		fadeOut.setDuration(200);
    
    		isShown = false;
    
    		if (this.target != null) {
    			applyTo(this.target);
    		} else {
    			show();
    		}
    
    	}
    
    	private void applyTo(View target) {
    
    		LayoutParams lp = target.getLayoutParams();
    		ViewParent parent = target.getParent();
    		FrameLayout container = new FrameLayout(context);
    
    		if (target instanceof TabWidget) {
    
    			// set target to the relevant tab child container
    			target = ((TabWidget) target).getChildTabViewAt(targetTabIndex);
    			this.target = target;
    
    			((ViewGroup) target).addView(container, 
    					new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));
    
    			this.setVisibility(View.GONE);
    			container.addView(this);
    
    		} else {
    
    			// TODO verify that parent is indeed a ViewGroup
    			ViewGroup group = (ViewGroup) parent; 
    			int index = group.indexOfChild(target);
    
    			group.removeView(target);
    			group.addView(container, index, lp);
    
    			container.addView(target);
    
    			this.setVisibility(View.GONE);
    			container.addView(this);
    
    			group.invalidate();
    
    		}
    
    	}
    
    	/**
    	 * Make the badge visible in the UI.
    	 * 
    	 */
    	public void show() {
    		show(false, null);
    	}
    
    	/**
    	 * Make the badge visible in the UI.
    	 *
    	 * @param animate flag to apply the default fade-in animation.
    	 */
    	public void show(boolean animate) {
    		show(animate, fadeIn);
    	}
    
    	/**
    	 * Make the badge visible in the UI.
    	 *
    	 * @param anim Animation to apply to the view when made visible.
    	 */
    	public void show(Animation anim) {
    		show(true, anim);
    	}
    
    	/**
    	 * Make the badge non-visible in the UI.
    	 * 
    	 */
    	public void hide() {
    		hide(false, null);
    	}
    
    	/**
    	 * Make the badge non-visible in the UI.
    	 *
    	 * @param animate flag to apply the default fade-out animation.
    	 */
    	public void hide(boolean animate) {
    		hide(animate, fadeOut);
    	}
    
    	/**
    	 * Make the badge non-visible in the UI.
    	 *
    	 * @param anim Animation to apply to the view when made non-visible.
    	 */
    	public void hide(Animation anim) {
    		hide(true, anim);
    	}
    
    	/**
    	 * Toggle the badge visibility in the UI.
    	 * 
    	 */
    	public void toggle() {
    		toggle(false, null, null);
    	}
    
    	/**
    	 * Toggle the badge visibility in the UI.
    	 * 
    	 * @param animate flag to apply the default fade-in/out animation.
    	 */
    	public void toggle(boolean animate) {
    		toggle(animate, fadeIn, fadeOut);
    	}
    
    	/**
    	 * Toggle the badge visibility in the UI.
    	 *
    	 * @param animIn Animation to apply to the view when made visible.
    	 * @param animOut Animation to apply to the view when made non-visible.
    	 */
    	public void toggle(Animation animIn, Animation animOut) {
    		toggle(true, animIn, animOut);
    	}
    
    	private void show(boolean animate, Animation anim) {
    //		if (getBackground() == null) {
    //			setBackgroundResource(R.drawable.bg1);
    //		}
    		applyLayoutParams();
    
    		if (animate) {
    			this.startAnimation(anim);
    		}
    		this.setVisibility(View.VISIBLE);
    		isShown = true;
    	}
    
    	private void hide(boolean animate, Animation anim) {
    		this.setVisibility(View.GONE);
    		if (animate) {
    			this.startAnimation(anim);
    		}
    		isShown = false;
    	}
    
    	private void toggle(boolean animate, Animation animIn, Animation animOut) {
    		if (isShown) {
    			hide(animate && (animOut != null), animOut);	
    		} else {
    			show(animate && (animIn != null), animIn);
    		}
    	}
    
    	/**
    	 * Increment the numeric badge label. If the current badge label cannot be converted to
    	 * an integer value, its label will be set to "0".
    	 * 
    	 * @param offset the increment offset.
    	 */
    	public int increment(int offset) {
    		CharSequence txt = getText();
    		int i;
    		if (txt != null) {
    			try {
    				i = Integer.parseInt(txt.toString());
    			} catch (NumberFormatException e) {
    				i = 0;
    			}
    		} else {
    			i = 0;
    		}
    		i = i + offset;
    		setText(String.valueOf(i));
    		return i;
    	}
    
    	/**
    	 * Decrement the numeric badge label. If the current badge label cannot be converted to
    	 * an integer value, its label will be set to "0".
    	 * 
    	 * @param offset the decrement offset.
    	 */
    	public int decrement(int offset) {
    		return increment(-offset);
    	}
    
    //	private ShapeDrawable getDefaultBackground() {//画圆
    //
    //		int r = dipToPixels(DEFAULT_CORNER_RADIUS_DIP)+4;
    //		float[] outerR = new float[] {r, r, r, r, r, r, r, r};
    //		RoundRectShape rr = new RoundRectShape(outerR, null, null);
    //		ShapeDrawable drawable = new ShapeDrawable(rr);
    //		drawable.getPaint().setColor(Color.RED);
    //
    //		return drawable;
    //
    //	}
    
    	private void applyLayoutParams() {
    
    		FrameLayout.LayoutParams lp = new FrameLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
    
    		switch (badgePosition) {
    		case POSITION_TOP_LEFT:
    			lp.gravity = Gravity.LEFT | Gravity.TOP;
    			lp.setMargins(badgeMarginV, badgeMarginH, 0, 0);
    			break;
    		case POSITION_TOP_RIGHT:
    			lp.gravity = Gravity.RIGHT | Gravity.TOP;
    			lp.setMargins(0, badgeMarginV, badgeMarginH, 0);
    			break;
    		case POSITION_TOP_RIGHT2:
    			break;
    		case POSITION_BOTTOM_LEFT:
    			lp.gravity = Gravity.LEFT | Gravity.BOTTOM;
    			lp.setMargins(badgeMarginH, 0, 0, badgeMarginV);
    			break;
    		case POSITION_BOTTOM_RIGHT:
    			lp.gravity = Gravity.RIGHT | Gravity.BOTTOM;
    			lp.setMargins(0, 0, badgeMarginH, badgeMarginV);
    			break;
    		case POSITION_CENTER:
    			lp.gravity = Gravity.CENTER;
    			lp.setMargins(0, 0, 0, 0);
    			break;
    		case POSITION://调整适合的手机布局
    			lp.setMargins(325, 105, 0, 0);
    		default:
    			break;
    		}
    
    		setLayoutParams(lp);
    
    	}
    
    	/**
    	 * Returns the target View this badge has been attached to.
    	 * 
    	 */
    	public View getTarget() {
    		return target;
    	}
    
    	/**
    	 * Is this badge currently visible in the UI?
    	 * 
    	 */
    	@Override
    	public boolean isShown() {
    		return isShown;
    	}
    
    	/**
    	 * Returns the positioning of this badge.
    	 * 
    	 * one of POSITION_TOP_LEFT, POSITION_TOP_RIGHT, POSITION_BOTTOM_LEFT, POSITION_BOTTOM_RIGHT, POSTION_CENTER.
    	 * 
    	 */
    	public int getBadgePosition() {
    		return badgePosition;
    	}
    
    	/**
    	 * Set the positioning of this badge.
    	 * 
    	 * @param layoutPosition one of POSITION_TOP_LEFT, POSITION_TOP_RIGHT, POSITION_BOTTOM_LEFT, POSITION_BOTTOM_RIGHT, POSTION_CENTER.
    	 * 
    	 */
    	public void setBadgePosition(int layoutPosition) {
    		this.badgePosition = layoutPosition;
    	}
    
    	/**
    	 * Returns the horizontal margin from the target View that is applied to this badge.
    	 * 
    	 */
    	public int getHorizontalBadgeMargin() {
    		return badgeMarginH;
    	}
    
    	/**
    	 * Returns the vertical margin from the target View that is applied to this badge.
    	 * 
    	 */
    	public int getVerticalBadgeMargin() {
    		return badgeMarginV;
    	}
    
    	/**
    	 * Set the horizontal/vertical margin from the target View that is applied to this badge.
    	 * 
    	 * @param badgeMargin the margin in pixels.
    	 */
    	public void setBadgeMargin(int badgeMargin) {
    		this.badgeMarginH = badgeMargin;
    		this.badgeMarginV = badgeMargin;
    	}
    
    	/**
    	 * Set the horizontal/vertical margin from the target View that is applied to this badge.
    	 * 
    	 * @param horizontal margin in pixels.
    	 * @param vertical margin in pixels.
    	 */
    	public void setBadgeMargin(int horizontal, int vertical) {
    		this.badgeMarginH = horizontal;
    		this.badgeMarginV = vertical;
    	}
    
    	/**
    	 * Returns the color value of the badge background.
    	 * 
    	 */
    	public int getBadgeBackgroundColor() {
    		return badgeColor;
    	}
    
    	/**
    	 * Set the color value of the badge background.
    	 * 
    	 * @param badgeColor the badge background color.
    	 */
    //	public void setBadgeBackgroundColor(int badgeColor) {
    //		this.badgeColor = badgeColor;
    //	}
    
    	private int dipToPixels(int dip) {
    		Resources r = getResources();
    		float px = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, dip, r.getDisplayMetrics());
    		return (int) px;
    	}
    
    }

[Demo]: http://download.csdn.net/detail/u011368551/8959053
[Center]: /images/20220731/d8115134c20a49b3a83358c516de9a27.png