1.申请权限
<uses-permission android:name="android.permission.REQUEST_INSTALL_PACKAGES" />
2.下载apk
try {
//读取文件
InputStream inputStream = body.byteStream();
//创建文件夹
File dirPath = Environment.getExternalStorageDirectory();
File dirsFile = new File(dirPath.getPath()+DOWNLOAD_PATH);
if (!dirsFile.exists()){
dirsFile.mkdirs();
}
String fileName = "quickFlight.apk";
File file = new File(dirsFile.toString(), fileName);
mApkPath = file.toString();
FileOutputStream outputStream = new FileOutputStream(file);
byte[] bytes = new byte[4096];
int len=0;
//循环读取文件的内容,把他放到新的文件目录里面
while ((len=inputStream.read(bytes))!= -1){
outputStream.write(bytes,0,len);
long length = file.length();
//获取下载的大小,并把它传给页面
int progress= (int) (length*100/ mContentLength);
mProgressBar.setProgress(progress);
// Log.i(TAG, "onNext: =====>>"+progress);
}
outputStream.close();
inputStream.close();
mContentLength =0;
} catch (Exception e) {
e.printStackTrace();
mContentLength = 0;
}
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