?
1，Toast
????????????
- ???????????????????????????
- ast.makeText(getApplicationContext(),?"登陆成功！",??
- Toast.LENGTH_SHORT).show();??
?
?
???? 2,简单提示框
??????
- AlertDialog.Builder?builder?=?new?Builder(home.this);???
- ????????builder.setMessage("确定要退出吗?");???
- ????????builder.setTitle("提示");???
- ????????builder.setPositiveButton("确认",???
- ????????????????new?android.content.DialogInterface.OnClickListener()?{???
- ????????????????????@Override??
- ????????????????????public?void?onClick(DialogInterface?dialog,?int?which)?{???
- ????????????????????????dialog.dismiss();???
- ????????????????????????home.this.finish();???
- ????????????????????}???
- ????????????????});???
- ????????builder.setNegativeButton("取消",???
- ????????????????new?android.content.DialogInterface.OnClickListener()?{???
- ????????????????????@Override??
- ????????????????????public?void?onClick(DialogInterface?dialog,?int?which)?{???
- ????????????????????????dialog.dismiss();???
- ????????????????????}??
- ????????????????});???
- ????????builder.create().show();???
?
?
???? 3，处理返回按钮
?
?????????????
- ??
- ????????@Override??
- ????????public?boolean?onKeyDown(int?keyCode,?KeyEvent?event)?{???
- ????????????if?(keyCode?==?KeyEvent.KEYCODE_BACK?&&?event.getRepeatCount()?==?0)?{???
- ????????????????dialog();???
- ????????????????return?false;???
- ????????????}???
- ????????????return?false;???
- ????????}??
Android——常用代码段积累《IT蓝豹》
原文：http://yichen95.iteye.com/blog/2249995
