在前一个问题(Take screensot and save android)中,我发现了如何将文件保存到android设备的sd卡中,并且它工作正常。现在我需要知道如何按名称编程查找文件,然后将文件上载到Facebook或Twitter。目前我最大的问题就是找到文件。
最佳答案
从库中获取文件的路径
String filepath; // filepath contains path of the file
public void getImage()
{
// To open up a gallery browser
Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(Intent.createChooser(intent, "Select Picture"),1);
// To handle when an image is selected from the browser, add the following to your Activity
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data)
{
if (resultCode == RESULT_OK) {
if (requestCode == 1) {
// currImageURI is the global variable I'm using to hold the content:// URI of the image
Uri currImageURI = data.getData();
File file = new File(getRealPathFromURI(currImageURI));
if (file.exists())
{
filepath=file.getAbsolutePath();
}
else
{
System.out.println("File Not Found");
}
}
}
}
public String getRealPathFromURI(Uri contentUri)
{
// can post image
String [] proj={MediaStore.Images.Media.DATA};
Cursor cursor = managedQuery( contentUri,
proj, // Which columns to return
null, // WHERE clause; which rows to return (all rows)
null, // WHERE clause selection arguments (none)
null); // Order-by clause (ascending by name)
int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
return cursor.getString(column_index);
}
从SDCard获取图像
File file = new File(android.os.Environment.getExternalStorageDirectory(),"MyDraw");
if(file.exists())
{
File myfile = new File(file.getAbsoluteFile()+File.separator+"name.png");
String path = myfile.getAbsolutePath();
}
将文件上载到服务器。我不知道如何将文件上传到Facebook或Twitter。
通常将文件上载到服务器
public void upload(String filepath)
{
try
{
HttpClient httpclient = new DefaultHttpClient();
httpclient.getParams().setParameter(CoreProtocolPNames.PROTOCOL_VERSION, HttpVersion.HTTP_1_1);
HttpPost httppost = new HttpPost("youe url");
File file = new File(filepath);
MultipartEntity mpEntity = new MultipartEntity();
ContentBody cbFile = new FileBody(file, "image/jpeg");
mpEntity.addPart("userfile", cbFile);
httppost.setEntity(mpEntity);
HttpResponse response = httpclient.execute(httppost);
HttpEntity resEntity = response.getEntity();
}
catch(Exception e)
{
e.printStackTrace();
}
}
关于android - 从SD卡按名称上传Android文件,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/16571001/