如何在android中从手机内存中读取文件？
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How to read file from phone's internal memory in android?
提问by rob
I have downloaded a file from HttpConnectionusing the FileOutputStreamin android and now its being written in phone's internal memory on path as i found it in File Explorer
我已经从HttpConnection使用FileOutputStreamandroid下载了一个文件，现在它被写入手机的内存中的路径，因为我在File Explorer
/data/data/com.example.packagename/files/123.ics
/data/data/com.example.packagename/files/123.ics
Now, I want to open & read the file content from phone's internal memory to UI. I tried to do it by using the FileInputStream, I have given just filename with extension to open it but I am not sure how to mention the file path for file in internal memory,as it forces the application to close.
现在，我想打开并将文件内容从手机内存读取到 UI。我尝试使用FileInputStream，我只给出了带有扩展名的文件名来打开它，但我不确定如何提及内部存储器中文件的文件路径，因为它会强制应用程序关闭。
Any suggestions?
有什么建议？
This is what I am doing:
这就是我正在做的：
try
{
FileInputStream fileIn;
fileIn = openFileInput("123.ics");
InputStream in = null;
EditText Userid = (EditText) findViewById(R.id.user_id);
byte[] buffer = new byte[1024];
int len = 0;
while ( (len = in.read(buffer)) > 0 )
{
Userid.setText(fileIn.read(buffer, 0, len));
}
fileIn.close();
} catch (FileNotFoundException e)
{
e.printStackTrace();
}
catch (IOException e)
{
e.printStackTrace();
}
回答by user606669
String filePath = context.getFilesDir().getAbsolutePath();//returns current directory.
File file = new File(filePath, fileName);
Similar post here
回答by CommonsWare
If the file is where you say it is, and your application is com.example.packagename, then calling openFileInput("123.ics");will return you a FileInputStreamon the file in question.
如果文件在您所说的位置，而您的应用程序是com.example.packagename，则调用openFileInput("123.ics");将返回FileInputStream有关文件的a 。
Or, call getFilesDir()to get a Fileobject pointing to /data/data/com.example.packagename/files, and work from there.
或者，调用getFilesDir()以获取File指向的对象/data/data/com.example.packagename/files，然后从那里开始工作。
回答by dax
I am using this code to open file in internal storage. i think i could help.
我正在使用此代码在内部存储中打开文件。我想我可以帮忙。
File str = new File("/data/data/com.xlabz.FlagTest/files/","hello_file.xml");
