安卓微信开放平台分享功能

这个我研究了好几天，微信文档跳着写的，还tm没技术支持，下面分享下我的心得，也算帮一下依然困在此的人 时间关系我没插图，见谅

1去【资源中心下载sdk】 （我们需要里面的jar包），和【签名生成工具】    移动应用抽屉里介入指南是文档  ，资源下载是 jar包 和签名工具

2.下载官方提供的Demo（需要复制里面的代码，demo导入eclips会报错不用管）

3.注册个微信开放平台的帐号，并且创建你们公司的app  跟着它的提示一步步走 注意看框下面的灰字提示

东西准备完 步骤开始

4.libammsdk.jar  这个jar包复制到项目 libs里，右键 Build Path --Configure Build Path..点进去  Libraries里有个 Add JARs 添加你的jar包

5.复制代码到你的事件里

需要分享的页面创建变量

 private static final String APP_ID ="wxb8c2413759c";//ID是第3步创建应用成功后才有的

 private IWXAPI api;

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如点击事件里加入核心代码

regToWx();
    WXWebpageObject webpage = new WXWebpageObject();
    webpage.webpageUrl = "www.baidu.com";
    WXMediaMessage msg = new WXMediaMessage(webpage);
    msg.title = "WebPage";
    msg.description = "WebPage";
    Bitmap thumb = BitmapFactory.decodeResource(getResources(),
    R.drawable.ic_launcher);
    msg.thumbData = Util.bmpToByteArray(thumb, true);
   
    SendMessageToWX.Req req = new SendMessageToWX.Req();
    req.transaction = buildTransaction("webpage");
    req.message = msg;
    req.scene = SendMessageToWX.Req.WXSceneSession;
    api.sendReq(req);
    finish();

 private void regToWx() {
    api = WXAPIFactory.createWXAPI(this, APP_ID, false);
  // 将应用注册到微信
  api.registerApp(APP_ID);
    }

还差一个工具类 代码太多了 起个名为Util 的工具类

private static final String TAG = "SDK_Sample.Util";

public static byte[] bmpToByteArray(final Bitmap bmp,
final boolean needRecycle) {
ByteArrayOutputStream output = new ByteArrayOutputStream();
bmp.compress(CompressFormat.PNG, 100, output);
if (needRecycle) {
bmp.recycle();
}


byte[] result = output.toByteArray();
try {
output.close();
} catch (Exception e) {
e.printStackTrace();
}


return result;
}


public static byte[] getHtmlByteArray(final String url) {
URL htmlUrl = null;
InputStream inStream = null;
try {
htmlUrl = new URL(url);
URLConnection connection = htmlUrl.openConnection();
HttpURLConnection httpConnection = (HttpURLConnection) connection;
int responseCode = httpConnection.getResponseCode();
if (responseCode == HttpURLConnection.HTTP_OK) {
inStream = httpConnection.getInputStream();
}
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
byte[] data = inputStreamToByte(inStream);


return data;
}


public static byte[] inputStreamToByte(InputStream is) {
try {
ByteArrayOutputStream bytestream = new ByteArrayOutputStream();
int ch;
while ((ch = is.read()) != -1) {
bytestream.write(ch);
}
byte imgdata[] = bytestream.toByteArray();
bytestream.close();
return imgdata;
} catch (Exception e) {
e.printStackTrace();
}


return null;
}


public static byte[] readFromFile(String fileName, int offset, int len) {
if (fileName == null) {
return null;
}


File file = new File(fileName);
if (!file.exists()) {
Log.i(TAG, "readFromFile: file not found");
return null;
}


if (len == -1) {
len = (int) file.length();
}


Log.d(TAG, "readFromFile : offset = " + offset + " len = " + len
+ " offset + len = " + (offset + len));


if (offset < 0) {
Log.e(TAG, "readFromFile invalid offset:" + offset);
return null;
}
if (len <= 0) {
Log.e(TAG, "readFromFile invalid len:" + len);
return null;
}
if (offset + len > (int) file.length()) {
Log.e(TAG, "readFromFile invalid file len:" + file.length());
return null;
}


byte[] b = null;
try {
RandomAccessFile in = new RandomAccessFile(fileName, "r");
b = new byte[len]; // ���������ļ���С������
in.seek(offset);
in.readFully(b);
in.close();


} catch (Exception e) {
Log.e(TAG, "readFromFile : errMsg = " + e.getMessage());
e.printStackTrace();
}
return b;
}


private static final int MAX_DECODE_PICTURE_SIZE = 1920 * 1440;


public static Bitmap extractThumbNail(final String path, final int height,
final int width, final boolean crop) {
Assert.assertTrue(path != null && !path.equals("") && height > 0
&& width > 0);


BitmapFactory.Options options = new BitmapFactory.Options();


try {
options.inJustDecodeBounds = true;
Bitmap tmp = BitmapFactory.decodeFile(path, options);
if (tmp != null) {
tmp.recycle();
tmp = null;
}


Log.d(TAG, "extractThumbNail: round=" + width + "x" + height
+ ", crop=" + crop);
final double beY = options.outHeight * 1.0 / height;
final double beX = options.outWidth * 1.0 / width;
Log.d(TAG, "extractThumbNail: extract beX = " + beX + ", beY = "
+ beY);
options.inSampleSize = (int) (crop ? (beY > beX ? beX : beY)
: (beY < beX ? beX : beY));
if (options.inSampleSize <= 1) {
options.inSampleSize = 1;
}


// NOTE: out of memory error
while (options.outHeight * options.outWidth / options.inSampleSize > MAX_DECODE_PICTURE_SIZE) {
options.inSampleSize++;
}


int newHeight = height;
int newWidth = width;
if (crop) {
if (beY > beX) {
newHeight = (int) (newWidth * 1.0 * options.outHeight / options.outWidth);
} else {
newWidth = (int) (newHeight * 1.0 * options.outWidth / options.outHeight);
}
} else {
if (beY < beX) {
newHeight = (int) (newWidth * 1.0 * options.outHeight / options.outWidth);
} else {
newWidth = (int) (newHeight * 1.0 * options.outWidth / options.outHeight);
}
}


options.inJustDecodeBounds = false;


Log.i(TAG, "bitmap required size=" + newWidth + "x" + newHeight
+ ", orig=" + options.outWidth + "x" + options.outHeight
+ ", sample=" + options.inSampleSize);
Bitmap bm = BitmapFactory.decodeFile(path, options);
if (bm == null) {
Log.e(TAG, "bitmap decode failed");
return null;
}


Log.i(TAG,
"bitmap decoded size=" + bm.getWidth() + "x"
+ bm.getHeight());
final Bitmap scale = Bitmap.createScaledBitmap(bm, newWidth,
newHeight, true);
if (scale != null) {
bm.recycle();
bm = scale;
}


if (crop) {
final Bitmap cropped = Bitmap.createBitmap(bm,
(bm.getWidth() - width) >> 1,
(bm.getHeight() - height) >> 1, width, height);
if (cropped == null) {
return bm;
}


bm.recycle();
bm = cropped;
Log.i(TAG,
"bitmap croped size=" + bm.getWidth() + "x"
+ bm.getHeight());
}
return bm;


} catch (final OutOfMemoryError e) {
Log.e(TAG, "decode bitmap failed: " + e.getMessage());
options = null;
}


return null;
}

工具类尾部

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6.清单文件里加入权限 官方文档有  注意放权限的位置和receiver的位置 

 <!-- 微信分享权限 -->
    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
    <uses-permission android:name="android.permission.READ_PHONE_STATE" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <!-- 微信分享权限 -->

<!--微信服务注册 -->
            <receiver
            android:name=".AppRegister"
            android:permission="com.tencent.mm.plugin.permission.SEND" >
            <intent-filter>
                <action android:name="com.tencent.mm.plugin.openapi.Intent.ACTION_REFRESH_WXAPP" />
            </intent-filter>
        </receiver>
       <!--微信服务注册 -->

7.去微信开放平台--管理中心-创建应用--  一般两天就审核通过了

需要注意几个地方 1 包名一定写你项目的 2.签名是应用审核通过后，去签名生成工具输入你的包名后给你生成的绿色签名码 添加到你开放平台--管理中心的应用签名处

最后一步 去应用后台把官方给的APP_ID复制到你的代码里  应该就可以了，今天是周一 我周五没实现就差个小步骤，以上全是凭印象写的  我现在能实现指定分享给好友，到朋友圈应该就改个参数，具体去官方deno里看下，只能帮这么多了