如果要监听是否安装的话,你要在程序中监听或伏扰程序安装广播
注册一下广播接收者,android系统安装和卸载都会发送广播的
这样,当你回来界面的时候,如果广厅逗播没有接收就表示用户取消了安装
1.下载软件安装包,存放在手机的SD卡上,这样就可以在Android手机里直接察握安装。这个方法需要首先对手机进行设置,“菜单键”-settings(设置)-Applications(应用程序)-Unknown sources(选择“未知源”)2.可以用USB数据线连接电脑,然后在电脑上对Android手机进行安装,但是首先需要在电脑上安装APK安装器等软件,可以批量安装程序,非常方便。枯没薯这个方没者法也需要首先对手机进行设置,settings(设置)-Applications(应用程序)-Development(开发)-USB debugging(选择“USB 调试”)
应用中如何调用系统所装的软件打开一个文件,这是我们经常碰到的问题,下面是我所用到的一种方法,和大家一起分享一下!
这个是打开文件的一个方法:
Java代码
/**
* 打开文件
* @param file
*/
private 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
startActivity(intent)
}
/**
* 根据文件后缀名获得对应的MIME类型。
* @param file
*/
private 耐手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()
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=0i<MIME_MapTable.lengthi++){ //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"态亩旅, "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"帆凳, "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"},
{"", "*/*"}
}
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