Android 微信分享图片

private String APP_ID = "00000000000000000"; //微信 APPID
private IWXAPI iwxapi;

private void regToWx() {iwxapi = WXAPIFactory.createWXAPI(context, APP_ID, true);//这里context记得初始化
    iwxapi.registerApp(APP_ID);
}

IMServer.getDiskBitmap(IMServer.url);

这个是我写的 一个从内存卡读取照片的类..   可根据自己需求更改

private void wxShare() {Bitmap bp = IMServer.getDiskBitmap(IMServer.url);WXImageObject wxImageObject = new WXImageObject(bp);WXMediaMessage msg = new WXMediaMessage();msg.mediaObject = wxImageObject;//设置缩略图Bitmap mBp = Bitmap.createScaledBitmap(bp, 120, 120, true);bp.recycle();msg.thumbData = bmpToByteArray(mBp, true);SendMessageToWX.Req req = new SendMessageToWX.Req();req.transaction = buildTransaction("img");//  transaction字段用req.message = msg;req.scene = SendMessageToWX.Req.WXSceneSession;iwxapi.sendReq(req);
}

我先上代码,我们看看上面的代码..设置缩略图那

 

官方给的 代码是  

msg.thumbData = Util.bmpToByteArray(thumbBitmap, true);

然后Util类,居然找不到(我用了qq的jar包,只能在这里找到.....)

所以我只能去demo里面找,然后把bmpToByteArray方法提取出来,如下

public static byte[] bmpToByteArray(final Bitmap bmp, final boolean needRecycle) {ByteArrayOutputStream output = new ByteArrayOutputStream();bmp.compress(Bitmap.CompressFormat.PNG, 100, output);if (needRecycle) {bmp.recycle();}byte[] result = output.toByteArray();try {output.close();} catch (Exception e) {e.printStackTrace();}return result;
}

然后再往下看,

  req.transaction = buildTransaction("img");//  transaction字段用

很明显  后面的是一个方法, 官方也没给出...   老方法 ,去demo里面找,如下

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