BadgeView.java
package com.woo.custom;/*该组件用于实现类似 新消息数量提示 的效果，使用方法： * button=(Button)findViewById(R.id.button); badge1=new BadgeView(this, button); badge1.setText("3"); badge1.setBadgePosition(BadgeView.POSITION_TOP_RIGHT); badge1.setBadgeCornerRadius(5); badge1.setBadgeMargin(10); badge1.setBadgeBackgroundColor(Color.parseColor("#ff8820")); badge1.toggle(); button.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub int num=Integer.parseInt(badge1.getText().toString()); badge1.setText(String.valueOf(num+1)); } }); * */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 = 5;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 int badgeCornerRadius;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 defaultsbadgePosition = DEFAULT_POSITION;badgeMargin = dipToPixels(DEFAULT_MARGIN_DIP);badgeColor = DEFAULT_BADGE_COLOR;badgeCornerRadius = DEFAULT_CORNER_RADIUS_DIP;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 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 containertarget = ((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 ViewGroupViewGroup 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) {if (badgeBg == null) {badgeBg = getDefaultBackground();}setBackgroundDrawable(badgeBg);}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() {int r = dipToPixels(badgeCornerRadius);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(badgeColor);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(badgeMargin, badgeMargin, 0, 0);break;case POSITION_TOP_RIGHT:lp.gravity = Gravity.RIGHT | Gravity.TOP;lp.setMargins(0, badgeMargin, badgeMargin, 0);break;case POSITION_BOTTOM_LEFT:lp.gravity = Gravity.LEFT | Gravity.BOTTOM;lp.setMargins(badgeMargin, 0, 0, badgeMargin);break;case POSITION_BOTTOM_RIGHT:lp.gravity = Gravity.RIGHT | Gravity.BOTTOM;lp.setMargins(0, 0, badgeMargin, badgeMargin);break;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? * */@Overridepublic boolean isShown() {return isShown;}public int getBadgeCornerRadius() {return badgeCornerRadius;}public void setBadgeCornerRadius(int badgeCornerRadius) {this.badgeCornerRadius = badgeCornerRadius;}/** * Returns the positioning of this badge. * * one of POSITION_TOP_LEFT, POSITION_TOP_RIGHT, POSITION_BOTTOM_LEFT, * POSITION_BOTTOM_RIGHT. * */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. * */public void setBadgePosition(int layoutPosition) {this.badgePosition = layoutPosition;}/** * Returns the horizontal/vertical margin from the target View that is * applied to this badge. * */public int getBadgeMargin() {return badgeMargin;}/** * 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.badgeMargin = badgeMargin;}/** * 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;badgeBg = getDefaultBackground();}private int dipToPixels(int dip) {Resources r = getResources();float px = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, dip,r.getDisplayMetrics());return (int) px;}}
调用方式
private BadgeView mMsgNumBv;private Button MyInformationBtn ;MyInformationBtn = (Button) findViewById(R.id.woo_menu_information);mMsgNumBv=new BadgeView(this, MyInformationBtn);mMsgNumBv.setText("3");//设置显示条数mMsgNumBv.setBadgePosition(BadgeView.POSITION_TOP_RIGHT);//位置mMsgNumBv.setBadgeCornerRadius(5);//圆角mMsgNumBv.setBadgeMargin(10);mMsgNumBv.setBadgeBackgroundColor(Color.parseColor("#ff8820"));//背景色//设置显示模式mMsgNumBv.toggle();//显示或隐藏
运行效果
![]()
