闲时整理（5）--圆形标签

结合闲时整理（3）------消息提示标签 BadgeView和闲时整理（4）--圆形TextView修改整理了CircleBadgeView这个类，标签是圆形的了，以前的标签是圆角矩形。

package com.glory.room.view;import android.content.Context;
import android.content.res.Resources;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.PaintFlagsDrawFilter;
import android.graphics.Typeface;
import android.graphics.drawable.ShapeDrawable;
import android.graphics.drawable.shapes.OvalShape;
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.ViewParent;
import android.view.ViewGroup.LayoutParams;
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;public class CircleBadgeView 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;private Paint mBgPaint = new Paint();PaintFlagsDrawFilter pfd = new PaintFlagsDrawFilter(0, Paint.ANTI_ALIAS_FLAG|Paint.FILTER_BITMAP_FLAG);public CircleBadgeView(Context context) {this(context, (AttributeSet) null, android.R.attr.textViewStyle);mBgPaint.setColor(Color.WHITE);mBgPaint.setAntiAlias(true);}public CircleBadgeView(Context context, AttributeSet attrs) {this(context, attrs, android.R.attr.textViewStyle);mBgPaint.setColor(Color.WHITE);mBgPaint.setAntiAlias(true);}/*** 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 CircleBadgeView(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 CircleBadgeView(Context context, TabWidget target, int index) {this(context, null, android.R.attr.textViewStyle, target, index);}public CircleBadgeView(Context context, AttributeSet attrs, int defStyle) {this(context, attrs, defStyle, null, 0);}public CircleBadgeView(Context context, AttributeSet attrs, int defStyle, View target, int tabIndex) {super(context, attrs, defStyle);init(context, target, tabIndex);}@Overrideprotected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {// TODO Auto-generated method stubsuper.onMeasure(widthMeasureSpec, heightMeasureSpec);int measuredWidth = getMeasuredWidth();int measuredHeight = getMeasuredHeight();int max = Math.max(measuredWidth, measuredHeight);setMeasuredDimension(max, max);}@Overridepublic void setBackgroundColor(int color) {// TODO Auto-generated method stub//super.setBackgroundColor(Color.RED);mBgPaint.setColor(color);}@Overridepublic void draw(Canvas canvas) {// TODO Auto-generated method stubcanvas.setDrawFilter(pfd);canvas.drawCircle(getWidth()/2, getHeight()/2, Math.max(getWidth(), getHeight())/2, mBgPaint);super.draw(canvas);}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;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(DEFAULT_CORNER_RADIUS_DIP);float[] outerR = new float[] {r, r, r, r, r, r, r, r};RoundRectShape rr = new RoundRectShape(outerR, null, null);OvalShape os = new OvalShape();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;}/*** 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;}
}

使用案例：

 private void initView() {login = (Button) findViewById(R.id.login);badge1 = new CircleBadgeView(this, login);badge1.setText("10");badge1.setBackgroundColor(Color.RED);//设置背景颜色badge1.setTextSize(15);//设置文字大小badge1.setGravity(Gravity.CENTER);//设置文字居中badge1.show();}

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