一、分享String

ShareCompat.IntentBuilder.from(this).setType("text/plain")
  .setText("内容").startChooser();

二、分享文件

    public void onShareFileClick(View v) {  

        try {   

            FileWriter fw = new FileWriter(getFilesDir() + "/foo.txt");  

            fw.write("This is a file share");  

            fw.close();  

            ShareCompat.IntentBuilder.from(this)  

                    .setType("text/plain")  

                    .setStream(Uri.parse(SharingSupportProvider.CONTENT_URI + "/foo.txt"))  

                    .startChooser();  

        } catch (FileNotFoundException e) {  

            e.printStackTrace();  

        } catch (IOException e) {  

            e.printStackTrace();  

        }  

    } 

具体请参考：http://www.cnblogs.com/outOfview/p/3643446.html

                   http://android.toolib.net/reference/android/support/v4/app/ShareCompat.IntentBuilder.html

一键分享到本地已有的软件上