寫微信分享的時候想著挺簡單的，寫了一半出現的錯誤分享出來。
第一個：
使用BottomDialog實現底部彈框的時候出現：

java.lang.NoClassDefFoundError

本來想著使用這個框架很快就實現了彈框的功能，程式碼就那幾行，加入compile 'top.zibin:BottomDialog:1.0.4'超級簡單，但是出現這個問題找了兩三個小時到快放棄，一直在網上查詢別人出現問題的解決辦法，無果。。第二天早上來的時候突然看到框架裡面有報錯，原來裡面使用到一個recycle包，然後在build gradle新增compile 'com.android.support:recyclerview-v7:25.0.1'

第二個：

使用微信支付分享網頁的時候點選一直沒有反應，然後試了一下分享文字和圖片都可以分享成功，只有網頁的時候分享不成功。

解決辦法：把分享網頁的縮圖不能超過32K，問題成功解決。

總結經驗：出現問題不要陷到自己認為錯誤的怪圈，可能出來溜達一圈或者吃個飯再回來看問題，一眼就出來了。哈哈，省時省力的辦法。

再分享一個在網上找的封裝微信分享的包，拿來直接用。
WechatShareManager：

public class WechatShareManager {
    private static final int THUMB_SIZE = 150;

    public
 
 static final int WECHAT_SHARE_WAY_TEXT = 1;   //文字
    public static final int WECHAT_SHARE_WAY_PICTURE = 2; //圖片
    public static final int WECHAT_SHARE_WAY_WEBPAGE = 3;  //連結
    public static final int WECHAT_SHARE_WAY_VIDEO = 4; //視訊
    public static final int WECHAT_SHARE_TYPE_TALK = SendMessageToWX.Req.WXSceneSession;  //會話
 

    public static final int WECHAT_SHARE_TYPE_FRENDS = SendMessageToWX.Req.WXSceneTimeline; //朋友圈

    private static WechatShareManager mInstance;
    private ShareContent mShareContentText, mShareContentPicture, mShareContentWebpag, mShareContentVideo;
    private IWXAPI mWXApi;
    private Context mContext;

    public WechatShareManager(Context context){
        this.mContext = context;
        //初始化資料
        //初始化微信分享程式碼
        initWechatShare(context);
    }

    /**
     * 獲取WeixinShareManager例項
     * 非執行緒安全，請在UI執行緒中操作
     * @return
     */
    public static WechatShareManager getInstance(Context context){
        if(mInstance == null){
            mInstance = new WechatShareManager(context);
        }
        return mInstance;
    }

    private void initWechatShare(Context context){
        if (mWXApi == null) {
            mWXApi = WXAPIFactory.createWXAPI(context, ApiUtils.WX_ID, true);
        }
        mWXApi.registerApp(ApiUtils.WX_ID);
    }

    /**
     * 通過微信分享
     * @param shareWay 分享的方式（文字、圖片、連結）
     * @param shareType 分享的型別（朋友圈，會話）
     */
    public void shareByWebchat(ShareContent shareContent, int shareType){
        switch (shareContent.getShareWay()) {
            case WECHAT_SHARE_WAY_TEXT:
                shareText(shareContent, shareType);
                break;
            case WECHAT_SHARE_WAY_PICTURE:
                sharePicture(shareContent, shareType);
                break;
            case WECHAT_SHARE_WAY_WEBPAGE:
                shareWebPage(shareContent, shareType);
                break;
            case WECHAT_SHARE_WAY_VIDEO:
                shareVideo(shareContent, shareType);
                break;
        }
    }

    private abstract class ShareContent {
        protected abstract int getShareWay();
        protected abstract String getContent();
        protected abstract String getTitle();
        protected abstract String getURL();
        protected abstract int getPictureResource();
    }

    /**
     * 設定分享文字的內容
     * @author chengcj1
     *
     */
    public class ShareContentText extends ShareContent {
        private String content;

        /**
         * 構造分享文字類
         * @param text 分享的文字內容
         */
        public ShareContentText(String content){
            this.content = content;
        }

        @Override
        protected int getShareWay() {
            return WECHAT_SHARE_WAY_TEXT;
        }

        @Override
        protected String getContent() {
            return content;
        }

        @Override
        protected String getTitle() {
            return null;
        }

        @Override
        protected String getURL() {
            return null;
        }

        @Override
        protected int getPictureResource() {
            return -1;
        }
    }

    /*
     * 獲取文字分享物件
     */
    public ShareContent getShareContentText(String content) {
        if (mShareContentText == null) {
            mShareContentText = new ShareContentText(content);
        }
        return (ShareContentText) mShareContentText;
    }

    /**
     * 設定分享圖片的內容
     * @author chengcj1
     *
     */
    public class ShareContentPicture extends ShareContent {
        private int pictureResource;
        public ShareContentPicture(int pictureResource){
            this.pictureResource = pictureResource;
        }

        @Override
        protected int getShareWay() {
            return WECHAT_SHARE_WAY_PICTURE;
        }

        @Override
        protected int getPictureResource() {
            return pictureResource;
        }

        @Override
        protected String getContent() {
            return null;
        }

        @Override
        protected String getTitle() {
            return null;
        }

        @Override
        protected String getURL() {
            return null;
        }
    }

    /*
     * 獲取圖片分享物件
     */
    public ShareContent getShareContentPicture(int pictureResource) {
        if (mShareContentPicture == null) {
            mShareContentPicture = new ShareContentPicture(pictureResource);
        }
        return (ShareContentPicture) mShareContentPicture;
    }

    /**
     * 設定分享連結的內容
     * @author chengcj1
     *
     */
    public class ShareContentWebpage extends ShareContent {
        private String title;
        private String content;
        private String url;
        private int pictureResource;
        public ShareContentWebpage(String title, String content, String url, int pictureResource){
            this.title = title;
            this.content = content;
            this.url = url;
            this.pictureResource = pictureResource;
        }

        @Override
        protected int getShareWay() {
            return WECHAT_SHARE_WAY_WEBPAGE;
        }

        @Override
        protected String getContent() {
            return content;
        }

        @Override
        protected String getTitle() {
            return title;
        }

        @Override
        protected String getURL() {
            return url;
        }

        @Override
        protected int getPictureResource() {
            return pictureResource;
        }
    }

    /*
     * 獲取網頁分享物件
     */
    public ShareContent getShareContentWebpag(String title, String content, String url, int pictureResource) {
        if (mShareContentWebpag == null) {
            mShareContentWebpag = new ShareContentWebpage(title, content, url, pictureResource);
        }
        return (ShareContentWebpage) mShareContentWebpag;
    }

    /**
     * 設定分享視訊的內容
     * @author chengcj1
     *
     */
    public class ShareContentVideo extends ShareContent {
        private String url;
        public ShareContentVideo(String url) {
            this.url = url;
        }

        @Override
        protected int getShareWay() {
            return WECHAT_SHARE_WAY_VIDEO;
        }

        @Override
        protected String getContent() {
            return null;
        }

        @Override
        protected String getTitle() {
            return null;
        }

        @Override
        protected String getURL() {
            return url;
        }

        @Override
        protected int getPictureResource() {
            return -1;
        }
    }

    /*
     * 獲取視訊分享內容
     */
    public ShareContent getShareContentVideo(String url) {
        if (mShareContentVideo == null) {
            mShareContentVideo = new ShareContentVideo(url);
        }
        return (ShareContentVideo) mShareContentVideo;
    }

    /*
     * 分享文字
     */
    private void shareText(ShareContent shareContent, int shareType) {
        String text = shareContent.getContent();
        //初始化一個WXTextObject物件
        WXTextObject textObj = new WXTextObject();
        textObj.text = text;
        //用WXTextObject物件初始化一個WXMediaMessage物件
        WXMediaMessage msg = new WXMediaMessage();
        msg.mediaObject = textObj;
        msg.description = text;
        //構造一個Req
        SendMessageToWX.Req req = new SendMessageToWX.Req();
        //transaction欄位用於唯一標識一個請求
        req.transaction = buildTransaction("textshare");
        req.message = msg;
        //傳送的目標場景， 可以選擇傳送到會話 WXSceneSession 或者朋友圈 WXSceneTimeline。 預設傳送到會話。
        req.scene = shareType;
        mWXApi.sendReq(req);
    }

    /*
     * 分享圖片
     */
    private void sharePicture(ShareContent shareContent, int shareType) {
        Bitmap bitmap = BitmapFactory.decodeResource(mContext.getResources(), shareContent.getPictureResource());
        WXImageObject imgObj = new WXImageObject(bitmap);

        WXMediaMessage msg = new WXMediaMessage();
        msg.mediaObject = imgObj;

        Bitmap thumbBitmap =  Bitmap.createScaledBitmap(bitmap, THUMB_SIZE, THUMB_SIZE, true);
        bitmap.recycle();
        msg.thumbData = PicUtils.bitmap2Bytes(thumbBitmap);  //設定縮圖

        SendMessageToWX.Req req = new SendMessageToWX.Req();
        req.transaction = buildTransaction("imgshareappdata");
        req.message = msg;
        req.scene = shareType;
        mWXApi.sendReq(req);
    }

    /*
     * 分享連結
     */
    private void shareWebPage(ShareContent shareContent, int shareType) {
        WXWebpageObject webpage = new WXWebpageObject();
        webpage.webpageUrl = shareContent.getURL();
        WXMediaMessage msg = new WXMediaMessage(webpage);
        msg.title = shareContent.getTitle();
        msg.description = shareContent.getContent();

        Bitmap thumb = BitmapFactory.decodeResource(mContext.getResources(), shareContent.getPictureResource());
        if(thumb == null) {
            Toast.makeText(mContext, "圖片不能為空", Toast.LENGTH_SHORT).show();
        } else {
            msg.thumbData = PicUtils.bitmap2Bytes(thumb);
        }

        SendMessageToWX.Req req = new SendMessageToWX.Req();
        req.transaction = buildTransaction("webpage");
        req.message = msg;
        req.scene = shareType;
        mWXApi.sendReq(req);
    }

    /*
     * 分享視訊
     */
    private void shareVideo(ShareContent shareContent, int shareType) {
        WXVideoObject video = new WXVideoObject();
        video.videoUrl = shareContent.getURL();

        WXMediaMessage msg = new WXMediaMessage(video);
        msg.title = shareContent.getTitle();
        msg.description = shareContent.getContent();
        Bitmap thumb = BitmapFactory.decodeResource(mContext.getResources(), R.mipmap.ic_launcher);
//      BitmapFactory.decodeStream(new URL(video.videoUrl).openStream());
        /**
         * 測試過程中會出現這種情況，會有個別手機會出現調不起微信客戶端的情況。造成這種情況的原因是微信對縮圖的大小、title、description等引數的大小做了限制，所以有可能是大小超過了預設的範圍。
         * 一般情況下縮圖超出比較常見。Title、description都是文字，一般不會超過。
         */
        Bitmap thumbBitmap =  Bitmap.createScaledBitmap(thumb, THUMB_SIZE, THUMB_SIZE, true);
        thumb.recycle();
        msg.thumbData =  PicUtils.bitmap2Bytes(thumbBitmap);

        SendMessageToWX.Req req = new SendMessageToWX.Req();
        req.transaction = buildTransaction("video");
        req.message = msg;
        req.scene =  shareType;
        mWXApi.sendReq(req);
    }

    private String buildTransaction(final String type) {
        return (type == null) ? String.valueOf(System.currentTimeMillis()) : type + System.currentTimeMillis();
    }

}

在點選分享的按鈕觸發事件

 //分享

          new BottomDialog(getActivity())
                  .title("分享到")
                  .orientation(BottomDialog.HORIZONTAL)
                  .inflateMenu(R.menu.menu_share)
                  .itemClick( new OnItemClickListener() {
                      @Override
                      public void click(Item item) {
                          if (!isWebchatAvaliable()) {
                              Toast.makeText(mContext, "請先安裝微信", Toast.LENGTH_LONG).show();
                              return;
                          }
                          mWechatShareManager= WechatShareManager.getInstance(getActivity());  ;
                          switch (item.getId()){
                              case R.id.moments:
                                  //分享到朋友圈
                              //    WechatShareManager.ShareContentText mShareContentText = (WechatShareManager.ShareContentText) mWechatShareManager.getShareContentText("微信文字分享");
                                  WechatShareManager.ShareContentWebpage mSharePage = (WechatShareManager.ShareContentWebpage) mWechatShareManager.getShareContentWebpag(getString(R.string.share_title),shareDesc,ApiUtils.SHARE_URL,R.mipmap.share1);
                                  mWechatShareManager.shareByWebchat(mSharePage, WechatShareManager.WECHAT_SHARE_TYPE_FRENDS );
                                  break;
                              case R.id.wechat:
                                //  WechatShareManager.ShareContentText mShareContentText1 = (WechatShareManager.ShareContentText) mWechatShareManager.getShareContentText("微信文字分享");
                                  WechatShareManager.ShareContentWebpage mSharePage2 = (WechatShareManager.ShareContentWebpage) mWechatShareManager.getShareContentWebpag(getString(R.string.share_title),shareDesc,ApiUtils.SHARE_URL,R.mipmap.share1);
                                  mWechatShareManager.shareByWebchat(mSharePage2, WechatShareManager.WECHAT_SHARE_TYPE_TALK );
                                  break;
                          }
                      }
                  })
               .show();

程式碼中有涉及bitmap轉位元組的方法自行百度，很簡單的。