Android微信SDK实现分享

摘自：http://blog.csdn.net/shineflowers/article/details/47951965

用微信提供的SDK来实现分享

从http://open.weixin.qq.com下载Android相关的jar包，将libammsdk.jar加入到项目中。

微信分享的核心类，部分代码如下：

WechatShareManager.Java

[java] view
plain copy

package com.jackie.umeng.share;

import android.content.Context;

import android.graphics.Bitmap;

import android.graphics.BitmapFactory;

import android.util.Log;

import android.widget.Toast;

import com.tencent.mm.sdk.modelmsg.SendMessageToWX;

import com.tencent.mm.sdk.modelmsg.WXImageObject;

import com.tencent.mm.sdk.modelmsg.WXMediaMessage;

import com.tencent.mm.sdk.modelmsg.WXTextObject;

import com.tencent.mm.sdk.modelmsg.WXVideoObject;

import com.tencent.mm.sdk.modelmsg.WXWebpageObject;

import com.tencent.mm.sdk.openapi.IWXAPI;

import com.tencent.mm.sdk.openapi.WXAPIFactory;

/**

* 实现微信分享功能的核心类

* @author chengcj1

*

*/

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; //图片

public static final int WECHAT_SHARE_WAY_WEBPAGE = 3; //链接

public static final int WECHAT_SHARE_WAY_VIDEO = 4; //视频

public static final int WECHAT_SHARE_TYPE_TALK = SendMessageToWX.Req.WXSceneSession; //会话

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;

private WechatShareManager(Context context){

this.mContext = context;

//初始化数据

//初始化微信分享代码

initWechatShare(context);

}

/**

* 获取WeixinShareManager实例

* 非线程安全，请在UI线程中操作

* @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, WechatShareUtil.WECHAT_APP_ID, true);

}

mWXApi.registerApp(WechatShareUtil.WECHAT_APP_ID);

}

/**

* 通过微信分享

* @param shareWay 分享的方式（文本、图片、链接）

* @param shareType 分享的类型（朋友圈，会话）

*/

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();

}

/**

* 设置分享文字的内容

* @author chengcj1

*

*/

public class ShareContentText extends ShareContent {

private String content;

/**

* 构造分享文字类

* @param text 分享的文字内容

*/

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;

}

}

/*

* 获取文本分享对象

*/

public ShareContent getShareContentText(String content) {

if (mShareContentText == null) {

mShareContentText = new ShareContentText(content);

}

return (ShareContentText) mShareContentText;

}

/**

* 设置分享图片的内容

* @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;

}

}

/*

* 获取图片分享对象

*/

public ShareContent getShareContentPicture(int pictureResource) {

if (mShareContentPicture == null) {

mShareContentPicture = new ShareContentPicture(pictureResource);

}

return (ShareContentPicture) mShareContentPicture;

}

/**

* 设置分享链接的内容

* @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;

}

}

/*

* 获取网页分享对象

*/

public ShareContent getShareContentWebpag(String title, String content, String url, int pictureResource) {

if (mShareContentWebpag == null) {

mShareContentWebpag = new ShareContentWebpage(title, content, url, pictureResource);

}

return (ShareContentWebpage) mShareContentWebpag;

}

/**

* 设置分享视频的内容

* @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;

}

}

/*

* 获取视频分享内容

*/

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);

}

/*

* 分享图片

*/

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 = WechatShareUtil.bitmapToByteArray(thumbBitmap, true); //设置缩略图

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

req.transaction = buildTransaction("imgshareappdata");

req.message = msg;

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 = WechatShareUtil.bitmapToByteArray(thumb, true);

}

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.send_music_thumb);

// 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 = WechatShareUtil.bitmapToByteArray(thumbBitmap, true);

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();

}

}

MainActivity.java

[java] view
plain copy

package com.jackie.umeng.share;

import com.jackie.umeng.share.WechatShareManager.ShareContentPicture;

import com.jackie.umeng.share.WechatShareManager.ShareContentText;

import com.jackie.umeng.share.WechatShareManager.ShareContentVideo;

import android.app.Activity;

import android.content.Context;

import android.content.pm.PackageManager;

import android.os.Bundle;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.Toast;

public class MainActivity extends Activity implements OnClickListener {

private Button mShareText, mSharePicture, mShareVideo;

private WechatShareManager mShareManager;

private Context mContext;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

mShareText = (Button) findViewById(R.id.share_text);

mSharePicture = (Button) findViewById(R.id.share_picture);

mShareVideo = (Button) findViewById(R.id.share_video);

mShareText.setOnClickListener(this);

mSharePicture.setOnClickListener(this);

mShareVideo.setOnClickListener(this);

mContext = this;

mShareManager = WechatShareManager.getInstance(mContext);

}

@Override

public void onClick(View v) {

if (!isWebchatAvaliable()) {

Toast.makeText(mContext, "请先安装微信", Toast.LENGTH_LONG).show();

return;

}

switch (v.getId()) {

case R.id.share_text:

ShareContentText mShareContentText = (ShareContentText) mShareManager.getShareContentText("微信文本分享");

mShareManager.shareByWebchat(mShareContentText, WechatShareManager.WECHAT_SHARE_TYPE_FRENDS);

break;

case R.id.share_picture:

ShareContentPicture mShareContentPicture = (ShareContentPicture) mShareManager.getShareContentPicture(R.drawable.share);

mShareManager.shareByWebchat(mShareContentPicture, WechatShareManager.WECHAT_SHARE_TYPE_FRENDS);

break;

case R.id.share_video:

ShareContentVideo mShareContentVideo = (ShareContentVideo) mShareManager.getShareContentVideo("http://baidu.hz.letv.com/kan/agSlT?fr=v.baidu.com/");

mShareManager.shareByWebchat(mShareContentVideo, WechatShareManager.WECHAT_SHARE_TYPE_FRENDS);

break;

default:

break;

}

}

private boolean isWebchatAvaliable() {

//检测手机上是否安装了微信

try {

getPackageManager().getPackageInfo("com.tencent.mm", PackageManager.GET_ACTIVITIES);

return true;

} catch (Exception e) {

return false;

}

}

}