android textview 获得焦点

	        edit = (EditText) findViewById(R.id.email);
		edit.addTextChangedListener(new TextWatcher() {
			@Override
			public void beforeTextChanged(CharSequence s, int start, int count,
					int after) {
				............................
			}
            
			
			@Override
			public void afterTextChanged(Editable s) {
	.........................................
			}
			
			
			

			@Override
			public void onTextChanged(CharSequence s, int start, int before,
					int count) {
			.................................
                        }

		});