android copy paste cut function application

There are many copy and paste articles on the Internet, just put their own procedures do not know how to deal with, now find 1 feasible method as follows:
Android clipboard (ClipboardManager)
Note: is used to guide packages
Before API 11: android.text.ClipboardManager
After API 11: android.content.ClipboardManager

 
/** 
*  Achieve text copy function  
* @param content 
*/ 
public static void copy(String content, Context context) { 
//  Get the clipboard manager  
ClipboardManager cmb = (ClipboardManager) context 
.getSystemService(Context.CLIPBOARD_SERVICE); 
cmb.setText(content.trim()); 
} 

 
/** 
*  Paste function  
* 
* @param context 
* @return 
*/ 
public static String paste(Context context) { 
//  Get the clipboard manager  
ClipboardManager cmb = (ClipboardManager) context 
.getSystemService(Context.CLIPBOARD_SERVICE); 
return cmb.getText().toString().trim(); 
} 

Many articles on the Internet say:
type 1:

 
private void emulateShiftHeld(KeyEvent.Callback view) { 
try{ 
KeyEvent shiftPressEvent = new KeyEvent(0, 0, KeyEvent.ACTION_DOWN, 
KeyEvent.KEYCODE_SHIFT_LEFT, 0, 0); 
shiftPressEvent.dispatch(view); 
} catch (Exception e) { 
} 
} 

type 2:
Version after android 2.1
1 :(successfully run)

 
ClipboardManager clip = (ClipboardManager)getSystemService(Context.CLIPBOARD_SERVICE); 
clip.getText(); //  paste  
clip.setText(str); //  copy  

2:

 
ClipboardManager c= (ClipboardManager)getSystemService(CLIPBOARD_SERVICE); 
c.setText(smsContent.getText());// Set up the Clipboard  The content of the  
c.getText(smsContent.getText());// extract clipboard The content of the  

Version before android 2.1

 
IClipboard clip = IClipboard.Stub.asInterface(ServiceManager.getService("clipboard")); 
clip.getClipboardText().toString();// Get the copied content  
clip.setClipboardText(text);// Set up the Clipboard  The content of the