【Android开发日记】微信API 分享到朋友圈

准备：

1.提交应用，得到APP_ID

2.下载SDK，将libammsdk.jar 拷到自己工程的libs中，添加。

代码：

//创建实例
WeChatapi = WXAPIFactory.createWXAPI(ShareMainActivity.this, Constants.WeChat_APP_ID,true);
//检查版本是否支持
int wxSdkVersion = WeChatapi.getWXAppSupportAPI();
if (wxSdkVersion  < WeChat_TIMELINE_SUPPORTED_VERSION)
Toast.makeText(ShareMainActivity.this, "版本限制只能发送给好友", Toast.LENGTH_LONG).show();

//注册
WeChatapi.registerApp(Constants.WeChat_APP_ID);
String filePath=Environment.getExternalStorageDirectory()+"/"+picnum+".jpg";
File file = new File(filePath);
if (!file.exists()) {
Toast.makeText(ShareMainActivity.this, "文件不存在" + " path = " + filePath, Toast.LENGTH_LONG).show();
}
else{
WXImageObject imgObj = new WXImageObject();
imgObj.setImagePath(filePath);

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

Bitmap bmp = BitmapFactory.decodeFile(filePath);
Bitmap thumbBmp = Bitmap.createScaledBitmap(bmp, THUMB_SIZE, THUMB_SIZE, true);
bmp.recycle();
msg.thumbData = Util.bmpToByteArray(thumbBmp, true);

SendMessageToWX.Req req = new SendMessageToWX.Req();
req.transaction = buildTransaction("img");
req.message = msg;
req.scene = (wxSdkVersion >= WeChat_TIMELINE_SUPPORTED_VERSION )? SendMessageToWX.Req.WXSceneTimeline : SendMessageToWX.Req.WXSceneSession;
WeChatapi.sendReq(req);

finish();

备注：

1.其中picnum为要分享的图片的名称。

2.没有涉及授权

3.使用的demo中的图片分享功能，同时分享图片和文字见教程：http://www.cnblogs.com/airshow/archive/2012/11/07/2758016.html