android 集成系统分享和第三方分享案例

  现在很多的应用基本都会集成分享这个功能,该功能包括系统分享(比如邮件,短信)和第三方分享(比如QQ和微信)。其中有些公司会选择使用第三方的库来简化这些操作,加快开发,用的比较多的比如友盟社会化分享SDK,缺点就是自由度太低,因为可能你仅仅只是需要QQ和微信,其他的公司就会选择自己导入所需要的第三方SDK来自定义分享功能,自由度高,于是这篇博客主要来介绍后一种自定义分享功能的案例demo,下图是demo的运行效果:
  
  具体分析一下源码,由于分享的内容根据需求的不同而不同,为了简单起见,我们就以最常用的图文+链接的形式为例,其他情况何以根据需求修改相关类。第一步定义分享的实体类:
  ShareModel.java

public class ShareModel {
    /** 分享的类型,图片,文字等 */
    public int type;
    /** 分享的标题 */
    public String title;
    /** 分享内容 */
    public String content;
    /** 分享的链接 */
    public String shareUrl;
    /** 分享图片的网络url */
    public ArrayList<String> imageUrl;
    /** 分享图片的本地path路径 */
    public ArrayList<String> imagePath;
}

  这个类定义了分享的基本数据类型(按照需求修改该类即可,比如可以添加视频语音之类)。接着我们建立各自的分享模块用来区分不同的分享(这里以系统和QQ分享为例),并且每个分享模块都要继承自同一个接口IShare:
  IShare.java

public interface IShare {
    /** * @param model 调用分享的实体 * @param context 上下文 * @param type 调用该分享的类别 * @param callback 分享回调 */
    void doShare(ShareModel model, Context context, int type, IShareCallback callback);

    /** * 该函数在{@link android.app.Activity#onActivityResult(int, int, Intent)} * 调用,用来处理分享的回调,比如QQ和系统分享(微信这种不需要在onActivityResult中处理的直接返回false即可) * @return 是否为该分享的回调 */
    boolean doShareCallback(int requestCode, int resultCode, Intent data);
}

  该接口定义了两个函数,一个是分享函数,另一个是分享的回调函数,系统分享和QQ分享的相关类继承该接口实现这两个函数:
  QQ分享TencentShare .class

public class TencentShare implements IShare {
    @Override
    public void doShare(ShareModel model, Context context, int type, IShareCallback callback) {
        //具体看源码
    }
    @Override
    public boolean doShareCallback(int requestCode, int resultCode, Intent data) {
        //具体看源码
    }
}

  系统分享SystemShare.class

public class SystemShare implements IShare {
    @Override
    public void doShare(ShareModel model, Context context, int type, IShareCallback callback) {
        //具体看源码
    }
    @Override
    public boolean doShareCallback(int requestCode, int resultCode, Intent data) {
        //具体看源码
    }
}

  如果需要集成其他第三方分享,新建相关类实现相关函数即可。然后就是最重要的管理类了,看看该类的源码:

public class ShareManager {
    private Activity activity;
    private IShareCallback callback;
    private PopupWindow popupWindow;
    /** 最新一次调用分享的对象 */
    private IShare shareObject;

    /** * @param callback 分享出去的回调 */
    public ShareManager(Activity activity, IShareCallback callback){
        this.activity = activity;
        this.callback = callback;
        //初始化Share枚举类
        Share demo = Share.QQ_FRIEND;
    }

    /** * 用来展示分享popUpWindow * @param model 分享出去的实体 */
    public void show(final ShareModel model) {
        if (popupWindow == null) {
            popupWindow = new ShareGridViewPopupWindow(activity, new ShareGridViewPopupWindow.IShareClickCallback() {
                @Override
                public void onShareCallback(int position) {
                    try {
                        Class<? extends IShare> clazz = Share.values()[position].getShareClass();
                        shareObject = clazz.newInstance();
                        shareObject.doShare(model, activity, Share.values()[position].getType(), callback);
                    } catch (InstantiationException e) {
                        e.printStackTrace();
                    } catch (IllegalAccessException e) {
                        e.printStackTrace();
                    }
                }
            });
            popupWindow.setOnDismissListener(new PopupWindow.OnDismissListener() {
                @Override
                public void onDismiss() {
                    popupWindow = null;
                }
            });
        }
        popupWindow.showAtLocation(activity.getWindow().getDecorView(), Gravity.BOTTOM | Gravity.CENTER_HORIZONTAL, 0, 0);
    }

    /** * 用来在activity的onActivityResult函数中注册分享回调,比如QQ和系统分享 * @return 是否是分享回调,如果是,返回true,表明activity不用处理相关result */
    public boolean registerOnActivityCallback(int requestCode, int resultCode, Intent data){
            return shareObject!=null && shareObject.doShareCallback(requestCode, resultCode, data);
    }

    /** * 在此处动态添加分享模块 */
    public enum Share {
        QQ_FRIEND("QQ", R.mipmap.logo_qq, 0, TencentShare.class),
        QQ_ZONE("QQ空间", R.mipmap.logo_qzone, 1, TencentShare.class),

        MAIL("邮件", R.mipmap.logo_email, 0, SystemShare.class),
        MESSAGE("信息", R.mipmap.logo_shortmessage, 1, SystemShare.class);

        private String name;
        private int drawable;
        private Class<? extends IShare> shareClass;
        private int type;

        Share(String name, int drawable, int type, Class<? extends IShare> shareClass){
            this.name = name;
            this.drawable = drawable;
            this.type = type;
            this.shareClass = shareClass;
        }

        public String getName(){
            return name;
        }
        public int getDrawableId(){
            return drawable;
        }
        public int getType(){
            return type;
        }
        public Class<? extends IShare> getShareClass() {
            return shareClass;
        }
    }
}

  该类使用一个enum来集中定义所有的分享,每个分享都会有一个名字和图片用来展示,而点击效果的回调则是由相关继承自IShare接口的class类对象调用doShare函数来进行处理,这么做的好处是利于管理和以后的分享类别的增加和删除。该类中还有一个registerOnActivityCallback函数,该函数是用来在Activity中的onActivityResult中注册分享回调,通知相关分享的回调成功与否。
  我们在这里使用popupWindow来弹出分享框,于是需要自定义一个popupWindow:
  ShareGridViewPopupWindow.java类:

public class ShareGridViewPopupWindow extends PopupWindow {

    private View mMenuView;
    private LayoutInflater inflater;
    private GridView gridView;
    private TextView tv_dismiss;
    private Activity context;
    private View view;

    public ShareGridViewPopupWindow(Activity context, final IShareClickCallback callback) {
        super();
        this.context = context;
        inflater = (LayoutInflater) context.getSystemService(Service.LAYOUT_INFLATER_SERVICE);
        mMenuView = inflater.inflate(R.layout.share_popupwindow, null);

        gridView = (GridView) mMenuView.findViewById(R.id.gridview);
        tv_dismiss = (TextView) mMenuView.findViewById(R.id.tv_dismiss);

        gridView.setAdapter(new GridViewAdapter());
        gridView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                if (callback != null)
                    callback.onShareCallback(position);
                dismiss();
            }
        });

        this.setAnimationStyle(R.style.share_PopupAnimation);
        //http://stackoverflow.com/questions/3121232/android-popup-window-dismissal
        this.setBackgroundDrawable(new BitmapDrawable(null,""));
        this.setFocusable(true);

        tv_dismiss.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                dismiss();
            }
        });

        this.setContentView(mMenuView);
        this.setWidth(LayoutParams.MATCH_PARENT);
        this.setHeight(LayoutParams.WRAP_CONTENT);

        //点击popUpWindow其他部分消失
        mMenuView.setOnTouchListener(new OnTouchListener() {
            public boolean onTouch(View v, MotionEvent event) {
                int height = mMenuView.findViewById(R.id.pop_layout).getTop();
                int y = (int) event.getY();
                if (event.getAction() == MotionEvent.ACTION_UP) {
                    if (y < height) {
                        dismiss();
                    }
                }
                return true;
            }
        });

        //增加popUpWindow其他部分的灰色效果
        view = new View(context);
        view.setBackgroundColor(Color.parseColor("#b0000000"));
        ((ViewGroup)context.getWindow().getDecorView().getRootView()).addView(view);
    }

    private class GridViewAdapter extends BaseAdapter {

        @Override
        public int getCount() {
            return ShareManager.Share.values().length;
        }

        @Override
        public Object getItem(int position) {
            return ShareManager.Share.values()[position];
        }

        @Override
        public long getItemId(int position) {
            return position;
        }

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            if (convertView == null) {
                convertView = inflater.inflate(R.layout.share_grid_item, null);
            }

            convertView.findViewById(R.id.iv_image).setBackgroundResource(ShareManager.Share.values()[position].getDrawableId());
            ((TextView)convertView.findViewById(R.id.tv_text)).setText(ShareManager.Share.values()[position].getName());
            return convertView;
        }
    }

    @Override
    public void dismiss() {
        super.dismiss();
        ((ViewGroup)context.getWindow().getDecorView().getRootView()).removeView(view);
    }

    public interface IShareClickCallback {
        void onShareCallback(int position);
    }
}

  该popupWindow使用gridView来进行布局,大家可以根据需求修改该布局,关于popupWindow的使用我这里说几点:第一点是popupWindow点击外部和返回键消失的处理,点击外部消失需要使用setOnTouchListener函数来监控用户触摸的位置,按下返回键的处理需要先使用setBackgroundDrawable函数给该popupWindow设置一个背景,接着使用setFocusable函数设置焦点;第二点是外侧的灰色背景,我这里使用的是当popupWindow展示的时候在decorView上加入一个透明黑色的view,在dismiss的时候去掉,这样效果就达到了。
  基本的思想就介绍完了,很简单,具体的大家可以去看源码:
  https://github.com/zhaozepeng/ShareManager

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