本文實(shí)例為大家分享了Android實(shí)現(xiàn)app分享文件到微信的具體代碼，供大家參考，具體內(nèi)容如下

1.使用WXFileObject構(gòu)造分享方法發(fā)送到微信；2.調(diào)用系統(tǒng)分享方法，把文件直接發(fā)送到微信；

那么下面來(lái)分別看看怎么實(shí)現(xiàn)：

0、準(zhǔn)備工作

首先，需要在AndroidManifest.xml中配置FileProvider信息，以適配10以后版本文件讀取問(wèn)題

AndroidManifest.xml

<provider android:name='androidx.core.content.FileProvider' android:authorities='${applicationId}.fileprovider' android:exported='false' android:grantUriPermissions='true' tools:replace='android:authorities'> <meta-dataandroid:name='android.support.FILE_PROVIDER_PATHS'android:resource='@xml/file_paths'tools:replace='android:resource' /></provider>

file_paths.xml

<paths> <external-pathname='external_files'path='.' /></paths>

一、使用WXFileObject構(gòu)造分享方法發(fā)送到微信

這種方式分享需要接入微信分享的SDK，分享到微信后可以顯示來(lái)源。但是官方文檔中沒(méi)有WXFileObject的示例，所以這里貼一段自己寫(xiě)的方法給大家做參考，其他分享類型可以參考官方文檔

ShareUtils.java

public static final String PACKAGE_WECHAT = 'com.tencent.mm'; /** * 分享文件到微信好友 by WXAPI * * @param thumbId 分享到微信顯示的圖標(biāo) */ public static void shareFileToWechat(Context context, File file, int thumbId) { if (!isInstallApp(context, ShareUtils.PACKAGE_WECHAT)) { Toast.makeText(context, '您需要安裝微信客戶端', Toast.LENGTH_LONG).show(); return;}//構(gòu)建發(fā)送文件體WXFileObject fileObject = new WXFileObject();byte[] fileBytes = readFile(file);//設(shè)置需要發(fā)送的文件byte[]fileObject.setFileData(fileBytes);fileObject.setFilePath(file.getAbsolutePath());//使用媒體消息分享WXMediaMessage msg = new WXMediaMessage(fileObject);//這個(gè)title有講究，最好設(shè)置為帶后綴的文件名，否則可能分享到微信后無(wú)法讀取msg.title = file.getName();//設(shè)置顯示的預(yù)覽圖 需小于32KBif (thumbId <= 0) thumbId = R.mipmap.ic_launcher;msg.thumbData = readBitmap(context, thumbId);//發(fā)送請(qǐng)求SendMessageToWX.Req req = new SendMessageToWX.Req();//創(chuàng)建唯一標(biāo)識(shí)req.transaction = String.valueOf(System.currentTimeMillis());req.message = msg;req.scene = SendMessageToWX.Req.WXSceneSession; //WXSceneSession:分享到對(duì)話// 通過(guò)WXAPIFactory工廠，獲取IWXAPI的實(shí)例IWXAPI api = WXAPIFactory.createWXAPI(context, WXEntryActivity.APP_ID, true);// 將應(yīng)用的appId注冊(cè)到微信api.registerApp(WXEntryActivity.APP_ID);api.sendReq(req); } // 判斷是否安裝指定app public static boolean isInstallApp(Context context, String app_package) {final PackageManager packageManager = context.getPackageManager();List<PackageInfo> pInfo = packageManager.getInstalledPackages(0);if (pInfo != null) { for (int i = 0; i < pInfo.size(); i++) {String pn = pInfo.get(i).packageName;if (app_package.equals(pn)) { return true;} }}return false; } /** * 圖片讀取成byte[] */ private static byte[] readBitmap(Context context, int resourceId) {Bitmap bitmap = BitmapFactory.decodeResource(context.getResources(), resourceId);ByteArrayOutputStream bos = new ByteArrayOutputStream();try { bitmap.compress(Bitmap.CompressFormat.PNG, 100, bos); return bos.toByteArray();} catch (Exception e) { e.printStackTrace();} finally { closeQuietly(bos);}return null; } /** * file文件讀取成byte[] */ private static byte[] readFile(File file) {RandomAccessFile rf = null;byte[] data = null;try { rf = new RandomAccessFile(file, 'r'); data = new byte[(int) rf.length()]; rf.readFully(data);} catch (Exception exception) { exception.printStackTrace();} finally { closeQuietly(rf);}return data; } //關(guān)閉讀取file private static void closeQuietly(Closeable closeable) {try { if (closeable != null) {closeable.close(); }} catch (Exception exception) { exception.printStackTrace(); }}

效果如下：

二、調(diào)用系統(tǒng)分享方法，把文件直接發(fā)送到微信

此種方式的好處就是不依賴微信SDK，調(diào)用系統(tǒng)提供的分享彈窗來(lái)分享到微信。

/** * 直接文件到微信好友 * * @param picFile 文件路徑 */ public static void shareWechatFriend(Context mContext, File picFile) { //首先判斷是否安裝微信if (isInstallApp(mContext, ShareUtils.PACKAGE_WECHAT)) { Intent intent = new Intent(); intent.setPackage(PACKAGE_WECHAT); intent.setAction(Intent.ACTION_SEND); String type = '*/*'; for (int i = 0; i < MATCH_ARRAY.length; i++) {//判斷文件的格式if (picFile.getAbsolutePath().toString().contains(MATCH_ARRAY[i][0].toString())) { type = MATCH_ARRAY[i][1]; break;} } intent.setType(type); Uri uri = null; if (picFile != null) {//這部分代碼主要功能是判斷了下文件是否存在，在android版本高過(guò)7.0（包括7.0版本）//當(dāng)前APP是不能直接向外部應(yīng)用提供file開(kāi)頭的的文件路徑，//需要通過(guò)FileProvider轉(zhuǎn)換一下。否則在7.0及以上版本手機(jī)將直接crash。try { ApplicationInfo applicationInfo = mContext.getApplicationInfo(); int targetSDK = applicationInfo.targetSdkVersion; if (targetSDK >= Build.VERSION_CODES.N && Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {uri = FileProvider.getUriForFile(mContext, mContext.getApplicationContext().getPackageName() + '.fileprovider', picFile); } else {uri = Uri.fromFile(picFile); } intent.putExtra(Intent.EXTRA_STREAM, uri);} catch (Exception e) { e.printStackTrace();} } intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); if (getVersionCode(mContext, PACKAGE_WECHAT) > VERSION_CODE_FOR_WEI_XIN_VER7) {// 微信7.0及以上版本intent.setAction(Intent.ACTION_SEND);intent.putExtra(Intent.EXTRA_STREAM, uri); } mContext.startActivity(Intent.createChooser(intent, '分享文件'));} else { Toast.makeText(mContext, '您需要安裝微信客戶端', Toast.LENGTH_LONG).show();} } // 建立一個(gè)文件類型與文件后綴名的匹配表 private static final String[][] MATCH_ARRAY = { //{后綴名， 文件類型} {'.3gp', 'video/3gpp'}, {'.apk', 'application/vnd.android.package-archive'}, {'.asf', 'video/x-ms-asf'}, {'.avi', 'video/x-msvideo'}, {'.bin', 'application/octet-stream'}, {'.bmp', 'image/bmp'}, {'.c', 'text/plain'}, {'.class', 'application/octet-stream'}, {'.conf', 'text/plain'}, {'.cpp', 'text/plain'}, {'.doc', 'application/msword'}, {'.exe', 'application/octet-stream'}, {'.gif', 'image/gif'}, {'.gtar', 'application/x-gtar'}, {'.gz', 'application/x-gzip'}, {'.h', 'text/plain'}, {'.htm', 'text/html'}, {'.html', 'text/html'}, {'.jar', 'application/java-archive'}, {'.java', 'text/plain'}, {'.jpeg', 'image/jpeg'}, {'.jpg', 'image/jpeg'}, {'.js', 'application/x-javascript'}, {'.log', 'text/plain'}, {'.m3u', 'audio/x-mpegurl'}, {'.m4a', 'audio/mp4a-latm'}, {'.m4b', 'audio/mp4a-latm'}, {'.m4p', 'audio/mp4a-latm'}, {'.m4u', 'video/vnd.mpegurl'}, {'.m4v', 'video/x-m4v'}, {'.mov', 'video/quicktime'}, {'.mp2', 'audio/x-mpeg'}, {'.mp3', 'audio/x-mpeg'}, {'.mp4', 'video/mp4'}, {'.mpc', 'application/vnd.mpohun.certificate'}, {'.mpe', 'video/mpeg'}, {'.mpeg', 'video/mpeg'}, {'.mpg', 'video/mpeg'}, {'.mpg4', 'video/mp4'}, {'.mpga', 'audio/mpeg'}, {'.msg', 'application/vnd.ms-outlook'}, {'.ogg', 'audio/ogg'}, {'.pdf', 'application/pdf'}, {'.png', 'image/png'}, {'.pps', 'application/vnd.ms-powerpoint'}, {'.ppt', 'application/vnd.ms-powerpoint'}, {'.prop', 'text/plain'}, {'.rar', 'application/x-rar-compressed'}, {'.rc', 'text/plain'}, {'.rmvb', 'audio/x-pn-realaudio'}, {'.rtf', 'application/rtf'}, {'.sh', 'text/plain'}, {'.tar', 'application/x-tar'}, {'.tgz', 'application/x-compressed'}, {'.txt', 'text/plain'}, {'.wav', 'audio/x-wav'}, {'.wma', 'audio/x-ms-wma'}, {'.wmv', 'audio/x-ms-wmv'}, {'.wps', 'application/vnd.ms-works'}, {'.xml', 'text/plain'}, {'.z', 'application/x-compress'}, {'.zip', 'application/zip'}, {'', '*/*'} };

效果如下：

以上，就是app通過(guò)微信分享文件的2種解決方式。

以上就是本文的全部?jī)?nèi)容，希望對(duì)大家的學(xué)習(xí)有所幫助，也希望大家多多支持好吧啦網(wǎng)。