第三方分享第一弹----微信分享

第三方分享第一弹----微信分享

大家都知道，分享功能几乎是所有APP都需要的基础功能，为了让大家免于到处去找资料，我这里简单的做了一下总结，也算是自己学习的一个记录。
下面我们先来看下微信的分享功能。

官方资料

首先，想要微信的分享，需要我们去微信公众平台创建我们的应用，这个其实很简单啦，大家按照步骤一步一步来就可以啦，应用审核一般两到三天就可以了，待审核通过以后就可以开始安心的敲代码啦.

微信的分享支持文本，视频，音频，图片，网页甚至小程序，在这里我们来看下官方介绍的方法：

官方文档传送门

首先我们需要依赖微信的第三方库：

    compile 'com.tencent.mm.opensdk:wechat-sdk-android-with-mta:1.1.6'

分享之前需要创建api对象，如下:

IWXAPI api;// WXAPIFactory工厂，获取IWXAPI实例api = WXAPIFactory.createWXAPI(context, Constants.WeChat_APPID, false);// 注册应用boolean flag = api.registerApp(Constants.WeChat_APPID); // 你申请应用的APPID

1.文本分享

WXTextObject textObject = new WXTextObject();textObject.text = "hello";//你要分享出去的文本WXMediaMessage msg = new WXMediaMessage();msg.mediaObject = textObject;msg.description = "hello";SendMessageToWX.Req req = new SendMessageToWX.Req();req.transaction = buildTransaction("text");// 唯一标识一个请求req.message = msg;// 发送到聊天界面——WXSceneSession// 发送到朋友圈——WXSceneTimeline// 添加到微信收藏——WXSceneFavoritereq.scene = SendMessageToWX.Req.WXSceneSession;api.sendReq(req);

2.图片分享

   Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.share_pic);    WXImageObject imageObject = new WXImageObject(bitmap);    WXMediaMessage msg = new WXMediaMessage();    msg.mediaObject = imageObject;    //设置缩略图    Bitmap bmp = Bitmap.createScaledBitmap(bitmap,80,80,true);    bitmap.recycle();    msg.thumbData = BitmapUtils.Bitmap2Bytes(bmp);    SendMessageToWX.Req req = new SendMessageToWX.Req();    req.transaction = buildTransaction("text");// 唯一标识一个请求    req.message = msg;    req.scene = SendMessageToWX.Req.WXSceneSession;    api.sendReq(req);

3.音乐分享

Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.share_pic);    WXMusicObject musicObject = new WXMusicObject();    musicObject.musicUrl = "音乐url";    WXMediaMessage msg = new WXMediaMessage();    msg.mediaObject = musicObject;    msg.title = "音乐标题";    msg.description = "音乐描述";    //设置缩略图    Bitmap bmp = Bitmap.createScaledBitmap(bitmap,80,80,true);    bitmap.recycle();    msg.thumbData = BitmapUtils.Bitmap2Bytes(bmp);    SendMessageToWX.Req req = new SendMessageToWX.Req();    req.transaction = buildTransaction("music");// 唯一标识一个请求    req.message = msg;    req.scene = SendMessageToWX.Req.WXSceneSession;    api.sendReq(req);

4.视频分享

Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.share_pic);    WXMusicObject musicObject = new WXMusicObject();    musicObject.musicUrl = "视频url";    WXMediaMessage msg = new WXMediaMessage();    msg.mediaObject = musicObject;    msg.title = "视频标题";    msg.description = "视频描述";    //设置缩略图    Bitmap bmp = Bitmap.createScaledBitmap(bitmap,80,80,true);    bitmap.recycle();    msg.thumbData = BitmapUtils.Bitmap2Bytes(bmp);    SendMessageToWX.Req req = new SendMessageToWX.Req();    req.transaction = buildTransaction("video");// 唯一标识一个请求    req.message = msg;    req.scene = SendMessageToWX.Req.WXSceneSession;    api.sendReq(req);

5.网页分享

 Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.share_pic);    WXMusicObject musicObject = new WXMusicObject();    musicObject.musicUrl = "网页url";    WXMediaMessage msg = new WXMediaMessage();    msg.mediaObject = musicObject;    msg.title = "网页标题";    msg.description = "网页描述";    //设置缩略图    Bitmap bmp = Bitmap.createScaledBitmap(bitmap,80,80,true);    bitmap.recycle();    msg.thumbData = BitmapUtils.Bitmap2Bytes(bmp);    SendMessageToWX.Req req = new SendMessageToWX.Req();    req.transaction = buildTransaction("webpage");// 唯一标识一个请求    req.message = msg;    req.scene = SendMessageToWX.Req.WXSceneSession;    api.sendReq(req);

小程序的我们暂时就不做分享了，但是从上面的官方案例中我们可以看出分享的代码高度一致，所以小编我就顺便优化了一下，代码如下，不喜勿喷：

经过优化封装后

public class WeChatShare {  // 第三方APP和微信通信的openApi接口  private static IWXAPI iwxapi;  private static Context mContext;  private int share_to = WxShareTo.share_session;  private int share_type = -1;  private String url = "";  private String title = "";  private String description = "";  private String shareText = "";  private Bitmap imageBitmap = null;  private String miniProgramId = "";  private String miniProgramPath = "";  public static WeChatShare regToWx(Context context) {    mContext = context;    // WXAPIFactory工厂，获取IWXAPI实例    iwxapi = WXAPIFactory.createWXAPI(context, Constants.WeChat_APPID, false);    // 注册应用    boolean flag = iwxapi.registerApp(Constants.WeChat_APPID);    Toast.makeText(context, "flag:" + flag, Toast.LENGTH_SHORT).show();    return new WeChatShare();  }  public WeChatShare setWhere(@WxShareTo int shareTo) {    share_to = shareTo;    return this;  }  /**   * 分享的类型   *   * @param type   *   * @return   */  public WeChatShare setType(@WxShareType int type) {    share_type = type;    return this;  }  /**   * 分享的Url   *   * @param url   *   * @return   */  public WeChatShare addUrl(String url) {    this.url = url;    return this;  }  /**   * 分享的标题   *   * @param title   *   * @return   */  public WeChatShare addTitle(String title) {    this.title = title;    return this;  }  /**   * 描述   *   * @param description   *   * @return   */  public WeChatShare addDescription(String description) {    this.description = description;    return this;  }  /**   * 分享的图片url   *   * @param imageUrl   *   * @return   */  public WeChatShare addImage(String imageUrl) {    if (TextUtils.isEmpty(imageUrl)) {      throw new NullPointerException("imageUrl is empty.");    }    addImage(BitmapUtils.getBitmap(imageUrl));    return this;  }  /**   * 分享的图片资源ID   *   * @param imageResource   *   * @return   */  public WeChatShare addImage(int imageResource) {    addImage(BitmapFactory.decodeResource(mContext.getResources(), imageResource));    return this;  }  /**   * 分享的图片bitmap   *   * @param imageBitmap   *   * @return   */  public WeChatShare addImage(Bitmap imageBitmap) {    this.imageBitmap = imageBitmap;    return this;  }  /**   * 分享的wenbennr   *   * @param shareText   *   * @return   */  public WeChatShare addShareText(String shareText) {    this.shareText = shareText;    return this;  }  /**   * 分享小程序的原始Id   *   * @param miniProgramId   *   * @return   */  public WeChatShare addMiniProgramId(String miniProgramId) {    this.miniProgramId = miniProgramId;    return this;  }  /**   * 分享小程序的path   *   * @param miniProgramPath   *   * @return   */  public WeChatShare addMiniProgramPath(String miniProgramPath) {    this.miniProgramPath = miniProgramPath;    return this;  }  public void share() {    WXMediaMessage msg = new WXMediaMessage();    if (share_type < 0) {      throw new NullPointerException("you should set share type first.");    }    // 标题    if (!TextUtils.isEmpty(title)) {      msg.title = title;    }    // 描述    if (!TextUtils.isEmpty(description)) {      msg.description = description;    }    String transaction = "";    switch (share_type) {      case WxShareType.type_text:        // 分享文本        transaction = "text";        msg.description = shareText;        WXTextObject textObject = new WXTextObject();        textObject.text = shareText;        msg.mediaObject = textObject;        break;      case WxShareType.type_image:        // 分享图片        transaction = "img";        if (null == imageBitmap) {          throw new NullPointerException("bitmap is null.");        }        msg.mediaObject = new WXImageObject(imageBitmap);        break;      case WxShareType.type_video:        // 分享视频        transaction = "video";        WXVideoObject videoObject;        videoObject = new WXVideoObject();        videoObject.videoUrl = url;        msg.mediaObject = videoObject;        break;      case WxShareType.type_music:        // 分享音频        transaction = "music";        WXMusicObject musicObject = new WXMusicObject();        musicObject.musicUrl = url;        msg.mediaObject = musicObject;        break;      case WxShareType.type_webPage:        // 分享网页        transaction = "webpage";        WXWebpageObject webpageObject = new WXWebpageObject();        webpageObject.webpageUrl = url;        msg.mediaObject = webpageObject;        break;      case WxShareType.type_miniProgram:        /**         * 注: 要求发起分享的App与小程序属于同一微信开放平台帐号。         * 小程序的原始ID获取方法：登录小程序后台-设置-基本设置-帐号信息         */        // 分享小程序        if (TextUtils.isEmpty(miniProgramId)) {          throw new NullPointerException("miniProgramId is empty.");        }        if (TextUtils.isEmpty(miniProgramPath)) {          throw new NullPointerException("miniProgramPath is empty.");        }        if (TextUtils.isEmpty(url)) {          throw new NullPointerException("the url for lower WeChat to open is empty.");        }        transaction = "webpage";        WXMiniProgramObject miniProgramObject = new WXMiniProgramObject();        miniProgramObject.webpageUrl = url;// 低版本微信将打开的url        miniProgramObject.userName = miniProgramId; // 跳转的小程序的原始ID        miniProgramObject.path = miniProgramPath; // 小程序的path        msg.mediaObject = miniProgramObject;        break;    }    // 缩略图    if (null != imageBitmap) {      Bitmap bmp = Bitmap.createScaledBitmap(imageBitmap, 80, 80, true);      imageBitmap.recycle();      msg.thumbData = BitmapUtils.Bitmap2Bytes(bmp);    }    sendMsg(msg, transaction);  }  /**   * 调起微信分享   *   * @param mediaMessage   */  private void sendMsg(WXMediaMessage mediaMessage, String transaction) {    if (!AppUtils.getInstance(mContext).isAppAvilible(AppUtils.WX_PKGNAME)) {      Toast.makeText(mContext, "您还未安装微信客户端，请先安装.", Toast.LENGTH_SHORT).show();      return;    }    if (TextUtils.isEmpty(transaction)) {      throw new NullPointerException("you should set share type first.");    }    // 构造Req    SendMessageToWX.Req req = new SendMessageToWX.Req();    req.transaction = buildTransaction(transaction);    req.message = mediaMessage;    req.scene = share_to;    iwxapi.sendReq(req);  }  private String buildTransaction(String type) {    return (type == null) ? String.valueOf(System.currentTimeMillis()) : type + System.currentTimeMillis();  }}

分享位置的参数值：

@IntDef ({ share_session, share_timeline, share_favorite })// 枚举数据@Retention (RetentionPolicy.SOURCE) //告诉编译器在生成.class文件时不保留枚举注解数据public @interface WxShareTo {  // 发送到聊天界面——WXSceneSession  int share_session = SendMessageToWX.Req.WXSceneSession;  // 发送到朋友圈——WXSceneTimeline  int share_favorite = SendMessageToWX.Req.WXSceneFavorite;  // 添加到微信收藏——WXSceneFavorite  int share_timeline = SendMessageToWX.Req.WXSceneTimeline;}

分享类型的参数值：

@IntDef ({ type_text, type_image, type_video, type_music, type_webPage, type_miniProgram })//枚举类型@Retention (RetentionPolicy.SOURCE) //告诉编译器在生成.class文件时不保留枚举注解数据public @interface WxShareType {  int type_text = 0;  int type_image = 1;  int type_video = 2;  int type_music = 3;  int type_webPage = 4;  int type_miniProgram = 5;}

相关工具类：

AppUtils.class

public class AppUtils {  public static AppUtils instance;  public static Context mContext;  public static final String QQ_PKGNAME = "com.tencent.mobileqq";  public static final String WX_PKGNAME = "com.tencent.mm";  public static AppUtils getInstance(Context context) {    mContext = context;    if (null == instance) {      synchronized (AppUtils.class) {        if (null == instance) {          instance = new AppUtils();        }      }    }    return instance;  }  public boolean isAppAvilible(String pkgName) {    final PackageManager packageManager = mContext.getPackageManager();// 获取packagemanager    List<PackageInfo> pinfo = packageManager.getInstalledPackages(0);// 获取所有已安装程序的包信息    if (pinfo != null) {      for (int i = 0; i < pinfo.size(); i++) {        String pn = pinfo.get(i).packageName;        if (pn.equals("com.tencent.mm")) {          return true;        }      }    }    return false;  }}

BitmapUtils.class

public class BitmapUtils {  /**   * 将图片内容解析成字节数组   *   * @param inStream   *   * @return byte[]   *   * @throws Exception   */  public static byte[] readStream(InputStream inStream) throws Exception {    byte[] buffer = new byte[1024];    int len = -1;    ByteArrayOutputStream outStream = new ByteArrayOutputStream();    while ((len = inStream.read(buffer)) != -1) {      outStream.write(buffer, 0, len);    }    byte[] data = outStream.toByteArray();    outStream.close();    inStream.close();    return data;  }  /**   * 将字节数组转换为ImageView可调用的Bitmap对象   *   * @param bytes   * @param opts   *   * @return Bitmap   */  public static Bitmap getPicFromBytes(byte[] bytes, BitmapFactory.Options opts) {    if (bytes != null) {      if (opts != null) {        return BitmapFactory.decodeByteArray(bytes, 0, bytes.length, opts);      } else {        return BitmapFactory.decodeByteArray(bytes, 0, bytes.length);      }    }    return null;  }  /**   * 图片缩放   *   * @param bitmap 对象   * @param w 要缩放的宽度   * @param h 要缩放的高度   *   * @return newBmp 新 Bitmap对象   */  public static Bitmap zoomBitmap(Bitmap bitmap, int w, int h) {    int width = bitmap.getWidth();    int height = bitmap.getHeight();    Matrix matrix = new Matrix();    float scaleWidth = ((float) w / width);    float scaleHeight = ((float) h / height);    matrix.postScale(scaleWidth, scaleHeight);    Bitmap newBmp = Bitmap.createBitmap(bitmap, 0, 0, width, height, matrix, true);    return newBmp;  }  /**   * 把Bitmap转Byte   */  public static byte[] Bitmap2Bytes(Bitmap bm) {    ByteArrayOutputStream baos = new ByteArrayOutputStream();    bm.compress(Bitmap.CompressFormat.PNG, 100, baos);    return baos.toByteArray();  }  /**   * 把字节数组保存为一个文件   */  public static File getFileFromBytes(byte[] b, String outputFile) {    BufferedOutputStream stream = null;    File file = null;    try {      file = new File(outputFile);      FileOutputStream fstream = new FileOutputStream(file);      stream = new BufferedOutputStream(fstream);      stream.write(b);    } catch (Exception e) {      e.printStackTrace();    } finally {      if (stream != null) {        try {          stream.close();        } catch (IOException e1) {          e1.printStackTrace();        }      }    }    return file;  }  public static Bitmap getBitmap(String url) {    Bitmap bm = null;    try {      URL iconUrl = new URL(url);      URLConnection conn = iconUrl.openConnection();      HttpURLConnection http = (HttpURLConnection) conn;      int length = http.getContentLength();      conn.connect();      // 获得图像的字符流      InputStream is = conn.getInputStream();      BufferedInputStream bis = new BufferedInputStream(is, length);      bm = BitmapFactory.decodeStream(bis);      bis.close();      is.close();// 关闭流    } catch (Exception e) {      e.printStackTrace();    }    return bm;  }}

使用起来也很简单，如果你看过gilde或者picasso的源码，那么，一眼就能看出来该怎么使用了，在此，仅做一个文本分享的示例：

WeChatShare.regToWx(this)// 注册APP到微信            .setWhere(WxShareTo.share_session)// 设置分享到哪边            .setType(WxShareType.type_text) // 设置分享的类型            .addShareText("你好") // 文本分享添加要分享的文本            .share(); // 发起分享请求

当然有分享就该有回调，这里需要注意的是，微信规定了回调类的格式，首先你需要在包名文件夹下新建wxapi 文件夹，然后在创建 WXEntryActivity 类集成自Activity并实现微信的IWXAPIEventHandler接口，然后就可以在onReq和onResq中得到回调内容，如下：

public class WXEntryActivity extends Activity implements IWXAPIEventHandler {  public static final String TAG = WXEntryActivity.class.getSimpleName().trim();  private IWXAPI api;  @Override protected void onCreate(@Nullable Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    TextView currrentTextView = new TextView(this);    setContentView(currrentTextView);    api = WXAPIFactory.createWXAPI(this, Constants.WeChat_APPID, false);    api.handleIntent(getIntent(), this);  }  @Override protected void onNewIntent(Intent intent) {    super.onNewIntent(intent);    api.handleIntent(intent, this);  }  @Override public void onReq(BaseReq baseReq) {    Log.i(TAG, "onReq: ");  }  @Override public void onResp(BaseResp resp) {    int errorCode = resp.errCode;    Log.i(TAG, "onResp: " + errorCode);    switch (errorCode) {      case BaseResp.ErrCode.ERR_OK:        //用户同意        //String code = ((SendAuth.Resp) resp).code;        Log.i(TAG, "ERR_OK: ");        break;      case BaseResp.ErrCode.ERR_AUTH_DENIED:        //用户拒绝        Log.i(TAG, "ERR_AUTH_DENIED: ");        break;      case BaseResp.ErrCode.ERR_USER_CANCEL:        //用户取消        Log.i(TAG, "ERR_USER_CANCEL: ");        break;      default:        break;    }  }}

自此，微信分享介绍完毕，不足之处，欢迎指正。