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以下代码是发送Intent让系统打开文件的Activity源码:
- importClass(java.io.File)
- importClass (android.content.Intent)
- importClass (android.net.Uri)
- importClass (android.os.Build)
- importClass (android.os.StrictMode)
- function openAndroidFile( filepath){
- var intent = new Intent();
- try {
- if (Build.VERSION.SDK_INT >= 25) {
- //安卓7.0以上
- var builder = new StrictMode.VmPolicy.Builder();
- StrictMode.setVmPolicy(builder.build());
- var file = new File(filepath);
- // intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);//设置标记
- intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
- intent.setAction(Intent.ACTION_VIEW);//动作,查看
- intent.setDataAndType(Uri.fromFile(file), getMIMEType(filepath))
- }else {
- intent = new Intent("android.intent.action.VIEW");
- intent.addCategory("android.intent.category.DEFAULT");
- intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
- // uri1 = Uri.parse(filepath );
- // intent.setDataAndType(uri1, "text/plain");
- //
- uri2 = Uri.fromFile(new File(filepath ));
- intent.setDataAndType(uri2, "text/plain");
- }
- }catch( az){
- logd("openAndroidFile:"+az)
- }
- return intent
- }
- function getMIMEType(file) {
- var MIME_MapTable=
- //{后缀名, MIME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",
- ".docx": "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",
- ".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",
- ".pptx": "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",
- ".xls": "text/plain",
- ".csv": "text/plain",
- ".wav": "audio/x-wav",
- ".wma": "audio/x-ms-wma",
- ".wmv": "audio/x-ms-wmv",
- ".wps": "application/vnd.ms-works",
- //".xml", "text/xml",
- ".xml": "text/plain",
- ".z": "application/x-compress",
- ".zip": "application/zip",
- "": "*/*"}
- var type="*/*";
- var fName = file
- //获取后缀名前的分隔符"."在fName中的位置。
- var dotIndex = fName.lastIndexOf(".");
- if(dotIndex < 0)
- return type;
- /* 获取文件的后缀名 */
- var fileType = fName.substr(dotIndex).toLowerCase();
- if(fileType == null || "".equals(fileType))
- return type;
- //在MIME和文件类型的匹配表中找到对应的MIME类型。
- for(var key in MIME_MapTable){
- if(fileType.equals(key )){
- type = MIME_MapTable[key];
- }
- }
- return type;
- }
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