Android Tips-TextView and edittext sync display

Method one. Using the View.onkeylistener "sync" display

Java code

1. EditText Myedit = (EditText) Findviewbyid (R.id.myedit);
2. TextView MyText = (TextView) Findviewbyid (R.id.mytext);
3. Myedit.setonkeylistener (new Edittext.onclicklistener () {
4. Public Boolean OnKey (View V, int keycode, keyevent event)
5. {
6. Mytext.settext (Myedit.gettext ());
7. return false;
8. }
9. });

Method Two. True synchronization with Textwatcher

Java code

2. Import android.app.Activity;
4. Import Android.os.Bundle;
6. Import android.text.Editable;
8. Import Android.text.TextWatcher;
10. Import Android.widget.EditText;
12. Import Android.widget.TextView;
16. Public class Textwatcherdemo extends Activity implements textwatcher{
18. /** Called when the activity is first created. * /
20. private TextView MyText;
22. private EditText Myedit;
24. @Override
26. public void OnCreate (Bundle savedinstancestate) {
28. super.oncreate (savedinstancestate);
30. Setcontentview (R.layout.main);
34. mytext= (TextView) Findviewbyid (R.id.text);
36. myedit= (EditText) Findviewbyid (R.id.edit);
40. Myedit.addtextchangedlistener (this);
42. }
44. @Override
46. public void aftertextchanged (Editable s) {
48. //TODO auto-generated method stub
52. }
54. @Override
56. public void beforetextchanged (charsequence s, int start, int count,
58. int after) {  
60. //TODO auto-generated method stub
64. }
66. @Override
68. public void ontextchanged (charsequence s, int start, int before, int count) {
70. //TODO auto-generated method stub
72. Mytext.settext (Myedit.gettext ());
74. }
78. }

Android Tips-TextView and edittext sync display