一. 配置

(1)module下build.gradle

implementation ('com.xyzlf.share:sharesdk:0.0.10') {

exclude group: 'com.android.support', module: 'appcompat-v7'

}

(2)AndroidManifest.xml

权限：

与activity平级，设置微信key：

二. 实现

(1)注册wxapi,

IWXAPI wxapi = WXAPIFactory.createWXAPI(this, "你的微信appid", true);

// 注册

wxapi.registerApp("你的微信appid");

(2)分享图片方法

private static final int THUMB_SIZE = 150;

/**

* 分享图片

* @param bitmap 图片

* @param shareType 0：分享到好友 1：分享到朋友圈

*/

private void sharePicture(Bitmap bitmap, int shareType) {

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 = Util.bmpToByteArray(thumbBitmap); //设置缩略图

SendMessageToWX.Req req = new SendMessageToWX.Req();

req.transaction = buildTransaction("imgshareappdata");

req.message = msg;

req.scene = shareType;

wxapi.sendReq(req);

}

public static byte[] bmpToByteArray(Bitmap bm) {

ByteArrayOutputStream baos = new ByteArrayOutputStream();

bm.compress(Bitmap.CompressFormat.PNG, 100, baos);

return baos.toByteArray();

}

private String buildTransaction(final String type) {

return (type == null) ? String.valueOf(System.currentTimeMillis()) : type + System.currentTimeMillis();

}

(3)截屏方法(截取当前界面)

/**

* 截屏

*

* @param activity 需要截屏的activity

* @return

*/

public static Bitmap capture(Activity activity) {

activity.getWindow().getDecorView().setDrawingCacheEnabled(true);

Bitmap bmp = activity.getWindow().getDecorView().getDrawingCache();

return bmp;

}

(4)调用

sharePicture(capture(MainActivity.this), 0);

至此，分享图片功能完成。

三. 扩展

下面是微信分享文字，链接，视频的

/*

* 分享文字

*/

private void shareText(String text, int shareType) {

//初始化一个WXTextObject对象

WXTextObject textObj = new WXTextObject();

textObj.text = text;

//用WXTextObject对象初始化一个WXMediaMessage对象

WXMediaMessage msg = new WXMediaMessage();

msg.mediaObject = textObj;

msg.description = text;

//构造一个Req

SendMessageToWX.Req req = new SendMessageToWX.Req();

//transaction字段用于唯一标识一个请求

req.transaction = buildTransaction("textshare");

req.message = msg;

//发送的目标场景， 可以选择发送到会话 WXSceneSession 或者朋友圈 WXSceneTimeline。 默认发送到会话。

req.scene = shareType;

mWXApi.sendReq(req);

}

/*

* 分享链接

*/

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, "图片不能为空", Toast.LENGTH_SHORT).show();

} else {

msg.thumbData = Util.bmpToByteArray(thumb);

}

SendMessageToWX.Req req = new SendMessageToWX.Req();

req.transaction = buildTransaction("webpage");

req.message = msg;

req.scene = shareType;

mWXApi.sendReq(req);

}

/*

* 分享视频

*/

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.drawable.ic_launcher_background);

// BitmapFactory.decodeStream(new URL(video.videoUrl).openStream());

/**

* 测试过程中会出现这种情况，会有个别手机会出现调不起微信客户端的情况。造成这种情况的原因是微信对缩略图的大小、title、description等参数的大小做了限制，所以有可能是大小超过了默认的范围。

* 一般情况下缩略图超出比较常见。Title、description都是文本，一般不会超过。

*/

Bitmap thumbBitmap = Bitmap.createScaledBitmap(thumb, THUMB_SIZE, THUMB_SIZE, true);

thumb.recycle();

msg.thumbData = Util.bmpToByteArray(thumbBitmap);

SendMessageToWX.Req req = new SendMessageToWX.Req();

req.transaction = buildTransaction("video");

req.message = msg;

req.scene = shareType;

mWXApi.sendReq(req);

}