简单处理原理:javascript
public void openFile0(File file){ String fileName = file.getAbsolutePath(); if(fileName.endsWith(".png") || fileName.endsWith(".jpg") || fileName.endsWith(".jpeg") || fileName.endsWith(".gif")){ Intent intent = new Intent(); intent.setAction(android.content.Intent.ACTION_VIEW); intent.setDataAndType(Uri.fromFile(file), "image/*"); startActivity(intent); }else if(fileName.endsWith(".mp4") || fileName.endsWith(".3gp") || fileName.endsWith(".avi") || fileName.endsWith(".flv") || fileName.endsWith(".wmv") || fileName.endsWith(".rmvb") || fileName.endsWith(".asf") || fileName.endsWith(".mkv") || fileName.endsWith(".mpg")){ Intent intent = new Intent(); intent.setAction(android.content.Intent.ACTION_VIEW); intent.setDataAndType(Uri.fromFile(file), "video/*"); startActivity(intent); }else if(fileName.endsWith(".mp3") || fileName.endsWith(".ogg") || fileName.endsWith(".ape")){ Intent intent = new Intent(); intent.setAction(android.content.Intent.ACTION_VIEW); intent.setDataAndType(Uri.fromFile(file), "audio/*"); startActivity(intent); }else if(fileName.endsWith(".apk")){ Intent intent = new Intent(); intent.setAction("android.intent.action.VIEW"); intent.addCategory("android.intent.category.DEFAULT"); intent.setDataAndType(Uri.fromFile(file), "application/vnd.android.package-archive"); startActivity(intent); } }
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通用性处理关键代码:java
/** * 调用可能打开文件的软件打开文件 * @param file */ public void openFile(File file){ Intent intent = new Intent(); intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); //设置intent的Action属性 intent.setAction(Intent.ACTION_VIEW); //获取文件file的MIME类型 String type = getMIMEType(file); //设置intent的data和Type属性。 intent.setDataAndType(/*uri*/Uri.fromFile(file), type); //跳转 try { startActivity(intent); // 可能无应用可打开, 避免程序崩溃 } catch (Exception e) { Toast.makeText(MainActivity.this, "无应用可打开此文件", Toast.LENGTH_SHORT).show(); return; } }
/** * 根据文件后缀名得到对应的MIME类型。 * @param file */ private String getMIMEType(File file) { String type="*/*"; String fName = file.getName(); //获取后缀名前的分隔符"."在fName中的位置。 int dotIndex = fName.lastIndexOf("."); if(dotIndex < 0){ return type; } /* 获取文件的后缀名*/ String end=fName.substring(dotIndex,fName.length()).toLowerCase(Locale.CHINA); if(end=="")return type; //在MIME和文件类型的匹配表中找到对应的MIME类型。 for(int i=0;i<FileFormatParams.MIME_MapTable.length;i++){ if(end.equals(FileFormatParams.MIME_MapTable[i][0])) type = FileFormatParams.MIME_MapTable[i][1]; } return type; }
/** * 文件后缀对应文件类型。 * */ public class FileFormatParams { public static final String 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/vnd.openxmlformats-officedocument.wordprocessingml.document"}, {".xls", "application/vnd.ms-excel"}, {".xlsx", "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"}, {".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"}, {".pptx", "application/vnd.openxmlformats-officedocument.presentationml.presentation"}, {".prop", "text/plain"}, {".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/x-zip-compressed"}, {"", "*/*"} }; }