相信大家都体验过android通讯录中的弹窗效果。如图所示:
android中提供了QuickContactBadge来实现这一效果。这里简单演示下。
首先创建布局文件:
- <?xml version="1.0" encoding="utf-8"?>
- <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
- android:orientation="vertical"
- android:layout_width="fill_parent"
- android:layout_height="fill_parent"
- >
- <QuickContactBadge
- android:id="@+id/badge"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:src="@drawable/icon">
- </QuickContactBadge>
- </LinearLayout>
很简单,在布局中添加一个QuickContactBadge组件即可。
在Activity中配置:
- public class QuickcontactActivity extends Activity {
-
-
- @Override
- public void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- setContentView(R.layout.main);
-
- QuickContactBadge smallBadge = (QuickContactBadge) findViewById(R.id.badge);
-
- smallBadge.assignContactFromEmail("[email protected]", true);
-
- smallBadge.setMode(ContactsContract.QuickContact.MODE_SMALL);
- }
- }
注意加入读通讯录的权限
<uses-permission android:name="android.permission.READ_CONTACTS"></uses-permission>
实现效果如图:
但是这个组件局限性很大,弹出窗口中只能是一些contact操作。但是仔细一想,这样的操作并不难,不就是一个带动画的弹窗么。下面就来我们自己实现一个。
实现一个带动画的弹窗并不难,在我的之前一篇博客中有讲过弹窗PopupWindow的使用,不清楚弹窗的朋友可以去看下。在这里实现的难点主要有这些:
1.判断基准view在屏幕中的位置,从而确定弹窗弹出的位置以及动画。这是非常重要的一点,或许基准在屏幕上方,那么就要向下弹出。
2.动态的添加弹窗中的按钮,并实现点击
3.箭头位置的控制。箭头应该保持在基准的下方。
4.动画的匹配。里面有两种动画。一种是PopupWindow弹出动画,我们通过设置弹窗的style来实现(style的用法可以参考我之前的博客)。另一种是弹窗中间的布局的动画。
了解了难点以后,写起来就方便了。
首先实现弹窗的布局:
- <?xml version="1.0" encoding="utf-8"?>
- <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content">
-
- <FrameLayout
- android:layout_marginTop="10dip"
- android:id="@+id/header2"
- android:layout_width="fill_parent"
- android:layout_height="wrap_content"
- android:background="@drawable/quickcontact_top_frame"/>
-
- <ImageView
- android:id="@+id/arrow_up"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:src="@drawable/quickcontact_arrow_up" />
-
- <HorizontalScrollView
- android:id="@+id/scroll"
- android:layout_width="fill_parent"
- android:layout_height="wrap_content"
- android:fadingEdgeLength="0dip"
- android:layout_below="@id/header2"
- android:background="@drawable/quickcontact_slider_background"
- android:scrollbars="none">
-
- <LinearLayout
- android:id="@+id/tracks"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:paddingTop="4dip"
- android:paddingBottom="4dip"
- android:orientation="horizontal">
-
- <ImageView
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:src="@drawable/quickcontact_slider_grip_left" />
-
- <ImageView
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:src="@drawable/quickcontact_slider_grip_right" />
-
- </LinearLayout>
-
- </HorizontalScrollView>
-
- <FrameLayout
- android:id="@+id/footer"
- android:layout_width="fill_parent"
- android:layout_height="wrap_content"
- android:layout_below="@id/scroll"
- android:background="@drawable/quickcontact_bottom_frame" />
-
- <ImageView
- android:id="@+id/arrow_down"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:layout_marginTop="-1dip"
- android:layout_below="@id/footer"
- android:src="@drawable/quickcontact_arrow_down" />
-
- </RelativeLayout>
窗体内部使用一个HorizontalScrollView可以实现一个滑动效果。我们可以动态的在这个布局中添加按钮,我们称作Actionitem。
写一个ActionItem类,使得我们可以用一个ArrayList做容器,动态的添加这些actionitem。这些都是服务于第二个难点。
- package com.notice.quickaction;
-
- import android.graphics.drawable.Drawable;
- import android.view.View.OnClickListener;
-
-
-
-
- public class ActionItem {
-
- private Drawable icon;
- private String title;
- private OnClickListener listener;
-
-
-
-
- public ActionItem() {
- }
-
-
-
-
- public ActionItem(Drawable icon) {
- this.icon = icon;
- }
-
-
-
-
- public void setTitle(String title) {
- this.title = title;
- }
-
-
-
-
-
-
- public String getTitle() {
- return this.title;
- }
-
-
-
-
- public void setIcon(Drawable icon) {
- this.icon = icon;
- }
-
-
-
-
- public Drawable getIcon() {
- return this.icon;
- }
-
-
-
-
- public void setOnClickListener(OnClickListener listener) {
- this.listener = listener;
- }
-
-
-
-
- public OnClickListener getListener() {
- return this.listener;
- }
- }
接下来就是这个弹窗的实现了,我们继承PopupWindow类。在这个类中我们需要实现通过位置设置动画及弹出位置,并且给出一个方法供实现类调用,来动态添加item和设置动画效果。
代码如下:
-
-
-
- public class QuickActions extends PopupWindow {
-
- private final View root;
- private final ImageView mArrowUp;
- private final ImageView mArrowDown;
- private final Animation mTrackAnim;
- private final LayoutInflater inflater;
- private final Context context;
-
- protected final View anchor;
- protected final PopupWindow window;
- private Drawable background = null;
- protected final WindowManager windowManager;
-
- protected static final int ANIM_GROW_FROM_LEFT = 1;
- protected static final int ANIM_GROW_FROM_RIGHT = 2;
- protected static final int ANIM_GROW_FROM_CENTER = 3;
- protected static final int ANIM_AUTO = 4;
-
- private int animStyle;
- private boolean animateTrack;
- private ViewGroup mTrack;
- private ArrayList<ActionItem> actionList;
-
-
-
-
-
-
- public QuickActions(View anchor) {
- super(anchor);
-
- this.anchor = anchor;
- this.window = new PopupWindow(anchor.getContext());
-
-
- window.setTouchInterceptor(new OnTouchListener() {
-
- @Override
- public boolean onTouch(View v, MotionEvent event) {
- if (event.getAction() == MotionEvent.ACTION_OUTSIDE) {
- QuickActions.this.window.dismiss();
-
- return true;
- }
-
- return false;
- }
- });
-
-
- windowManager = (WindowManager) anchor.getContext().getSystemService(Context.WINDOW_SERVICE);
-
- actionList = new ArrayList<ActionItem>();
- context = anchor.getContext();
- inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
-
-
- root = (ViewGroup) inflater.inflate(R.layout.quickaction, null);
-
-
- mArrowDown = (ImageView) root.findViewById(R.id.arrow_down);
- mArrowUp = (ImageView) root.findViewById(R.id.arrow_up);
-
- setContentView(root);
-
- mTrackAnim = AnimationUtils.loadAnimation(anchor.getContext(), R.anim.rail);
-
-
- mTrackAnim.setInterpolator(new Interpolator() {
-
- public float getInterpolation(float t) {
-
- final float inner = (t * 1.55f) - 1.1f;
-
- return 1.2f - inner * inner;
- }
- });
-
-
- mTrack = (ViewGroup) root.findViewById(R.id.tracks);
- animStyle = ANIM_AUTO;
- animateTrack = true;
- }
-
-
-
-
- public void animateTrack(boolean animateTrack) {
- this.animateTrack = animateTrack;
- }
-
-
-
-
- public void setAnimStyle(int animStyle) {
- this.animStyle = animStyle;
- }
-
-
-
-
- public void addActionItem(ActionItem action) {
- actionList.add(action);
- }
-
-
-
-
- public void show() {
-
- preShow();
-
- int[] location = new int[2];
-
- anchor.getLocationOnScreen(location);
-
-
- Rect anchorRect = new Rect(location[0], location[1], location[0] + anchor.getWidth(), location[1]
- + anchor.getHeight());
-
- root.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
- root.measure(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
-
- int rootWidth = root.getMeasuredWidth();
- int rootHeight = root.getMeasuredHeight();
-
-
- int screenWidth = windowManager.getDefaultDisplay().getWidth();
-
-
- int xPos = (screenWidth - rootWidth) / 2;
- int yPos = anchorRect.top - rootHeight;
-
- boolean onTop = true;
-
-
- if (rootHeight > anchorRect.top) {
- yPos = anchorRect.bottom;
- onTop = false;
- }
-
-
- showArrow(((onTop) ? R.id.arrow_down : R.id.arrow_up), anchorRect.centerX());
-
-
- setAnimationStyle(screenWidth, anchorRect.centerX(), onTop);
-
-
- createActionList();
-
-
- window.showAtLocation(this.anchor, Gravity.NO_GRAVITY, xPos, yPos);
-
-
- if (animateTrack) mTrack.startAnimation(mTrackAnim);
- }
-
-
-
-
- protected void preShow() {
- if (root == null) {
- throw new IllegalStateException("需要为弹窗设置布局");
- }
-
-
- if (background == null) {
- window.setBackgroundDrawable(new BitmapDrawable());
- } else {
- window.setBackgroundDrawable(background);
- }
-
- window.setWidth(WindowManager.LayoutParams.WRAP_CONTENT);
- window.setHeight(WindowManager.LayoutParams.WRAP_CONTENT);
- window.setTouchable(true);
- window.setFocusable(true);
- window.setOutsideTouchable(true);
-
- window.setContentView(root);
- }
-
-
-
-
-
-
-
-
- private void setAnimationStyle(int screenWidth, int requestedX, boolean onTop) {
-
- int arrowPos = requestedX - mArrowUp.getMeasuredWidth() / 2;
-
- switch (animStyle) {
- case ANIM_GROW_FROM_LEFT:
- window.setAnimationStyle((onTop) ? R.style.Animations_PopUpMenu_Left : R.style.Animations_PopDownMenu_Left);
- break;
-
- case ANIM_GROW_FROM_RIGHT:
- window.setAnimationStyle((onTop) ? R.style.Animations_PopUpMenu_Right : R.style.Animations_PopDownMenu_Right);
- break;
-
- case ANIM_GROW_FROM_CENTER:
- window.setAnimationStyle((onTop) ? R.style.Animations_PopUpMenu_Center : R.style.Animations_PopDownMenu_Center);
- break;
-
- case ANIM_AUTO:
- if (arrowPos <= screenWidth / 4) {
- window.setAnimationStyle((onTop) ? R.style.Animations_PopUpMenu_Left : R.style.Animations_PopDownMenu_Left);
- } else if (arrowPos > screenWidth / 4 && arrowPos < 3 * (screenWidth / 4)) {
- window.setAnimationStyle((onTop) ? R.style.Animations_PopUpMenu_Center : R.style.Animations_PopDownMenu_Center);
- } else {
- window.setAnimationStyle((onTop) ? R.style.Animations_PopDownMenu_Right : R.style.Animations_PopDownMenu_Right);
- }
-
- break;
- }
- }
-
-
-
-
- private void createActionList() {
- View view;
- String title;
- Drawable icon;
- OnClickListener listener;
- int index = 1;
-
- for (int i = 0; i < actionList.size(); i++) {
- title = actionList.get(i).getTitle();
- icon = actionList.get(i).getIcon();
- listener = actionList.get(i).getListener();
-
- view = getActionItem(title, icon, listener);
-
- view.setFocusable(true);
- view.setClickable(true);
-
-
- mTrack.addView(view, index);
-
- index++;
- }
- }
-
-
-
-
-
-
-
-
-
- private View getActionItem(String title, Drawable icon, OnClickListener listener) {
-
- LinearLayout container = (LinearLayout) inflater.inflate(R.layout.action_item, null);
- ImageView img = (ImageView) container.findViewById(R.id.icon);
- TextView text = (TextView) container.findViewById(R.id.title);
-
- if (icon != null) {
- img.setImageDrawable(icon);
- } else {
- img.setVisibility(View.GONE);
- }
-
- if (title != null) {
- text.setText(title);
- } else {
- text.setVisibility(View.GONE);
- }
-
- if (listener != null) {
- container.setOnClickListener(listener);
- }
-
- return container;
- }
-
-
-
-
-
-
-
- private void showArrow(int whichArrow, int requestedX) {
- final View showArrow = (whichArrow == R.id.arrow_up) ? mArrowUp : mArrowDown;
- final View hideArrow = (whichArrow == R.id.arrow_up) ? mArrowDown : mArrowUp;
-
- final int arrowWidth = mArrowUp.getMeasuredWidth();
-
- showArrow.setVisibility(View.VISIBLE);
-
- ViewGroup.MarginLayoutParams param = (ViewGroup.MarginLayoutParams) showArrow.getLayoutParams();
-
-
- param.leftMargin = requestedX - arrowWidth / 2;
-
- hideArrow.setVisibility(View.INVISIBLE);
- }
-
- }
有点长,不过注释都写的很清楚了。show()方法完成窗口的弹出。里面调用其他方法设置了窗口弹出的位置,设置了相应的动画弹出风格和箭头朝向以及位置,创建了action item。大家可以从这个方法里开始看,看每个的实现。
最后写个测试类。放一个Button在屏幕顶部,一个在屏幕底部。点击弹出弹窗。
再讲下PopupWindow的风格的实现。其中一个风格代码如下:
- <style name="Animations.PopDownMenu.Left">
- <item name="@android:windowEnterAnimation">@anim/grow_from_topleft_to_bottomright</item>
- <item name="@android:windowExitAnimation">@anim/shrink_from_bottomright_to_topleft</item>
- </style>
写两个item,分别实现弹出和消失动画。因为篇幅有限(好像已经很长了。。。),就不全部贴出来了。动画都是一个scale加一个alpha,对动画不熟悉的朋友可以自己研究下,从底部弹出的动画文件grow_from_bottom.xml:
- <?xml version="1.0" encoding="utf-8"?>
- <set xmlns:android="http://schemas.android.com/apk/res/android">
- <scale
- android:fromXScale="0.3" android:toXScale="1.0"
- android:fromYScale="0.3" android:toYScale="1.0"
- android:pivotX="50%" android:pivotY="100%"
- android:duration="@android:integer/config_shortAnimTime"
- />
- <alpha
- android:interpolator="@android:anim/decelerate_interpolator"
- android:fromAlpha="0.0" android:toAlpha="1.0"
- android:duration="@android:integer/config_shortAnimTime"
- />
- </set>
最后来看看实现效果: