本文实例为大家分享了Android实现app分享文件到微信的具体代码，供大家参考，具体内容如下
两种实现方案：
1.使用WXFileObject构造分享方法发送到微信；
2.调用系统分享方法，把文件直接发送到微信；
那么下面来分别看看怎么实现：
0、准备工作
首先，需要在AndroidManifest.xml中配置FileProvider信息，以适配10以后版本文件读取问题
AndroidManifest.xml
file_paths.xml
一、使用WXFileObject构造分享方法发送到微信
这种方式分享需要接入微信分享的SDK，分享到微信后可以显示来源。但是官方文档中没有WXFileObject的示例，所以这里贴一段自己写的方法给大家做参考，其他分享类型可以参考官方文档
ShareUtils.java
public static final String PACKAGE_WECHAT = "com.tencent.mm";
/**
* 分享文件到微信好友 by WXAPI
*
* @param thumbId 分享到微信显示的图标
*/
public static void shareFileToWechat(Context context, File file, int thumbId) {
if (!isInstallApp(context, ShareUtils.PACKAGE_WECHAT)) {
Toast.makeText(context, "您需要安装微信客户端", Toast.LENGTH_LONG).show();
return;
}
//构建发送文件体
WXFileObject fileObject = new WXFileObject();
byte[] fileBytes = readFile(file);
//设置需要发送的文件byte[]
fileObject.setFileData(fileBytes);
fileObject.setFilePath(file.getAbsolutePath());
//使用媒体消息分享
WXMediaMessage msg = new WXMediaMessage(fileObject);
//这个title有讲究，最好设置为带后缀的文件名，否则可能分享到微信后无法读取
msg.title = file.getName();
//设置显示的预览图 需小于32KB
if (thumbId <= 0) thumbId = R.mipmap.ic_launcher;
msg.thumbData = readBitmap(context, thumbId);
//发送请求
SendMessageToWX.Req req = new SendMessageToWX.Req();
//创建唯一标识
req.transaction = String.valueOf(System.currentTimeMillis());
req.message = msg;
req.scene = SendMessageToWX.Req.WXSceneSession; //WXSceneSession:分享到对话
// 通过WXAPIFactory工厂，获取IWXAPI的实例
IWXAPI api = WXAPIFactory.createWXAPI(context, WXEntryActivity.APP_ID, true);
// 将应用的appId注册到微信
api.registerApp(WXEntryActivity.APP_ID);
api.sendReq(req);
}
// 判断是否安装指定app
public static boolean isInstallApp(Context context, String app_package) {
final PackageManager packageManager = context.getPackageManager();
List 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;
}
/**
* 图片读取成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文件读取成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;
}
//关闭读取file
private static void closeQuietly(Closeable closeable) {
try {
if (closeable != null) {
closeable.close();
}
} catch (Exception exception) {
exception.printStackTrace();
}
}
效果如下：
二、调用系统分享方法，把文件直接发送到微信
此种方式的好处就是不依赖微信SDK，调用系统提供的分享弹窗来分享到微信。
/**
* 直接文件到微信好友
*
* @param picFile 文件路径
*/
public static void shareWechatFriend(Context mContext, File picFile) {
//首先判断是否安装微信
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++) {
//判断文件的格式
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) {
//这部分代码主要功能是判断了下文件是否存在，在android版本高过7.0（包括7.0版本）
//当前APP是不能直接向外部应用提供file开头的的文件路径，
//需要通过FileProvider转换一下。否则在7.0及以上版本手机将直接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, "您需要安装微信客户端", Toast.LENGTH_LONG).show();
}
}
// 建立一个文件类型与文件后缀名的匹配表
private static final String[][] MATCH_ARRAY = {
//{后缀名， 文件类型}
{".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通过微信分享文件的2种解决方式。
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。