android 打开各种文件的方式
16lz
2021-01-23
Java Demo
private void openFile(File file){ Intent intent = new Intent(); intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); intent.setAction(Intent.ACTION_VIEW); //设置intent的Action属性 String type = getMIMEType(file); //获取文件file的MIME类型 intent.setDataAndType(/*uri*/Uri.fromFile(file), type); //设置intent的data和Type属性。 startActivity(intent); //比如说你的MIME类型是打开邮箱，但是你手机里面没装邮箱客户端，就会报错。 } 根据文件后缀名获得对应的MIME类型。
private String getMIMEType(File file) { String type="*/*"; String fName = file.getName(); int dotIndex = fName.lastIndexOf("."); //获取后缀名前的分隔符"."在fName中的位置。 if(dotIndex < 0){ return type; } String end=fName.substring(dotIndex,fName.length()).toLowerCase(); /* 获取文件的后缀名*/ 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//MIME_MapTable??在这里你一定有疑问，这个MIME_MapTable是什么？ if(end.equals(MIME_MapTable[i][0])) type = MIME_MapTable[i][1]; } return type; } MIME_MapTable是所有文件的后缀名所对应的MIME类型的一个String数组：
Java代码
private 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"}, {"", "*/*"} }; - Intent open a picture file public:
Intent intent = new Intent("android.intent.action.VIEW"); intent.addCategory("android.intent.category.DEFAULT"); intent.addFlags (Intent.FLAG_ACTIVITY_NEW_TASK); Uri uri = Uri.fromFile(new File("/mnt/sdcard/images/001041580.jpg")); intent.setDataAndType (uri, "image/*"); this.startActivity(intent); - Intent to open a PDF file:
Intent intent = new Intent("android.intent.action.VIEW"); intent.addCategory("android.intent.category.DEFAULT"); intent.addFlags (Intent.FLAG_ACTIVITY_NEW_TASK); Uri uri = Uri.fromFile(new File("file:///android_asset/helphelp.pdf")); intent.setDataAndType (uri, "application/pdf"); this.startActivity(intent); - Intent to open a text file:
Intent intent = new Intent("android.intent.action.VIEW"); intent.addCategory("android.intent.category.DEFAULT"); intent.addFlags (Intent.FLAG_ACTIVITY_NEW_TASK); if (paramBoolean) { Uri uri1 = Uri.parse (param); intent.setDataAndType (URI1, "text/plain"); } else { Uri uri = Uri.fromFile(new File("/mnt/sdcard/hello.txt")); intent.setDataAndType (URI2, "text/plain"); } this.startActivity(intent); - Intent to open the audio file:
Intent intent = new Intent("android.intent.action.VIEW"); intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); intent.putExtra ("oneshot", 0); intent.putExtra ("configchange", 0); Uri uri = Uri.fromFile(new File("/mnt/sdcard/ren.mp3")); intent.setDataAndType (uri, "audio/*"); this.startActivity(intent); - Intent to open the video file:
Intent intent = new Intent("android.intent.action.VIEW"); intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); intent.putExtra ("oneshot", 0); intent.putExtra ("configchange", 0); Uri uri = Uri.fromFile(new File("/mnt/sdcard/ice.avi")); intent.setDataAndType (uri, "video/*"); this.startActivity(intent); - Intent to open the CHM file:
Intent intent = new Intent("android.intent.action.VIEW"); intent.addCategory("android.intent.category.DEFAULT"); intent.addFlags (Intent.FLAG_ACTIVITY_NEW_TASK); Uri uri = Uri.fromFile(new File("/mnt/sdcard/ice.chm")); intent.setDataAndType (uri, "application / x-chm"); this.startActivity(intent); - Intent to open a Word document:
Intent intent = new Intent("android.intent.action.VIEW"); intent.addCategory("android.intent.category.DEFAULT"); intent.addFlags (Intent.FLAG_ACTIVITY_NEW_TASK); Uri uri = Uri.fromFile(new File("/system/etc/help.doc")); intent.setDataAndType(uri, "application/msword"); this.startActivity(intent); - Android Excel intent:
Intent intent = new Intent("android.intent.action.VIEW"); intent.addCategory("android.intent.category.DEFAULT"); intent.addFlags (Intent.FLAG_ACTIVITY_NEW_TASK); Uri uri = Uri.fromFile(new File("/mnt/sdcard/Book1.xls")); intent.setDataAndType (uri, "application/vnd.ms-excel"); this.startActivity(intent); - Intent to open the PPT file:
Intent intent = new Intent("android.intent.action.VIEW"); intent.addCategory("android.intent.category.DEFAULT"); intent.addFlags (Intent.FLAG_ACTIVITY_NEW_TASK); Uri uri = Uri.fromFile(new File("/mnt/sdcard/download/Android_PPT.ppt")); intent.setDataAndType (uri, "application/vnd.ms-powerpoint"); this.startActivity(intent); - Display Html page::
Uri uri = Uri.parse ("http://www.google.com"); Intent intent = new Intent (Intent.ACTION_VIEW, uri); this.startActivity(intent); - Show map:
Uri uri = Uri.parse ("geo: 38.899533, -77.036476"); Intent intent = new Intent (Intent.Action_VIEW, uri); this.startActivity(intent); - Call the dialer:
Uri uri = Uri.parse ("tel: xxxxxx"); Intent intent = new Intent (Intent.ACTION_DIAL, uri); this.startActivity(intent); - Call :
Uri uri = Uri.parse ("tel: xxxxxx"); Intent it = new Intent (Intent.ACTION_CALL, uri); this.startActivity(intent); /*permission: */ - Call to send text messages of the program :
Intent intent = new Intent (Intent.ACTION_VIEW); intent.putExtra("sms_body", "The SMS text"); intent.setType("vnd.android-dir/mms-sms"); this.startActivity(intent); - Send SMS :
Uri uri = Uri.parse("smsto:0800000123"); Intent intent = new Intent(Intent.ACTION_SENDTO, uri); intent.putExtra("sms_body", "The SMS text"); this.startActivity(intent); - Send MMS :
Uri uri = Uri.parse("content://media/external/images/media/23"); Intent intent = new Intent(Intent.ACTION_SEND); intent.putExtra("sms_body", "some text"); intent.putExtra(Intent.EXTRA_STREAM, uri); intent.setType("image/png"); this.startActivity(intent); - Send an Email :
Uri uri = Uri.parse ("mailto: xxx@abc.com"); Intent intent = new Intent (Intent.ACTION_SENDTO, uri); this.startActivity(intent); - Send an Email with body :
Intent intent = new Intent(Intent.ACTION_SEND); intent.putExtra(Intent.EXTRA_EMAIL,"me@abc.com"); intent.putExtra(Intent.EXTRA_TEXT,"The email body text"); intent.setType ("text/plain"); this.startActivity( Intent.createChooser(intent, "Choose Email Client")); - Send an Email with body,to,cc :
Intent intent = new Intent(Intent.ACTION_SEND); String [] tos ={"me@abc.com"}; String [] ccs ={"you@abc.com"}; intent.putExtra(Intent.EXTRA_EMAIL, tos); intent.putExtra(Intent.EXTRA_CC, ccs); intent.putExtra(Intent.EXTRA_TEXT, "The email body text"); intent.putExtra(Intent.EXTRA_SUBJECT, "The email subject text"); intent.setType("message/rfc822"); this.startActivity( Intent.createChooser(intent, "Choose Email Client")); - Send an Email with attachments :
Intent intent = new Intent(Intent.ACTION_SEND); intent.putExtra(Intent.EXTRA_SUBJECT,"The email subject text"); intent.putExtra(Intent.EXTRA_STREAM,"file :///sdcard/mysong.mp3"); sendIntent.setType("audio/mp3"); this.startActivity( Intent.createChooser(intent,"Choose Email Client")); - Uninstall the program :
Uri uri = Uri.fromParts ("package", strPackageName, null); Intent intent = new Intent (Intent.ACTION_DELETE, uri); this.startActivity( Intent.createChooser(intent,"Choose Email Client")); - Install the apk :
Uri installUri = Uri.fromParts("package", "xxx", null); returnIt = new Intent(Intent.ACTION_PACKAGE_ADDED, installUri); this.startActivity(returnIt); - Search applications :
Uri uri = Uri.parse("market://search?Q=pname:pkg_name"); Intent intent = new Intent(Intent.ACTION_VIEW, uri); this.startActivity(intent); //Where pkg_name is the full package path for an application - Google Search Launch Web Browser :
Intent intent = new Intent(Intent.ACTION_WEB_SEARCH); String term = "Android"; intent.putExtra(SearchManager.QUERY, term); activity.startActivity(intent); - Send text using Intent (to messaging apps) :
Intent intent = new Intent(Intent.ACTION_WEB_SEARCH); String msgBody = "This is message"; Intent intent = new Intent(android.content.Intent.ACTION_SEND); intent.setType("text/plain"); intent.putExtra(android.content.Intent.EXTRA_SUBJECT, "message subject"); intent.putExtra(android.content.Intent.EXTRA_TEXT, msgBody); activity.startActivity(Intent.createChooser(intent, getResources(). getString(R.string.share_by_using))); - Create Shortcut on “Home Screen” :
Intent intent = new Intent(Intent.ACTION_WEB_SEARCH); Intent toPrint = new Intent(this, anCreateshutcut.class); Intent addShortcut = new Intent ("com.android.launcher.action.INSTALL_SHORTCUT"); addShortcut.putExtra(Intent.EXTRA_SHORTCUT_NAME, "Shutcutname"); addShortcut.putExtra(Intent.EXTRA_SHORTCUT_INTENT, toPrint); addShortcut.putExtra(Intent.EXTRA_SHORTCUT_ICON_RESOURCE, Intent.ShortcutIconResource.fromContext(this, R.drawable.icon)); Manifest file: <intent-filter> <action android:name="android.intent.action.CREATE_SHORTCUT"> <category android:name="android.intent.category.LAUNCHER"> category>action>intent-filter> <uses-permission android:name="com.android.launcher. permission.INSTALL_SHORTCUT"> uses-permission> 参考链接
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