我是android的新手.我想开发一个应用程序,通过编程方式使用蓝牙找到该范围内的设备.如果有任何想法,请给我一些示例代码.
我是安卓新手。请帮我。我无法向多个收件人发送电子邮件。这是我的代码。
public class SendEmailActivity extends Activity{
EditText subject_ed,message_ed;
TextView subject_tv,message_tv;
Button send_btn;
ArrayList<String> emailList;
ArrayList<Integer> idList;
int eventId;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.contacts_email_sms_layout);
setupViews();
Intent intent = getIntent();
Bundle b = intent.getExtras();
eventId = b.getInt("EventId");//event id
idList = b.getIntegerArrayList("IdList");//list of Ids
emailList = b.getStringArrayList("EmailList");//list of email ids
buttonListeners();
}
public void setupViews()
{
subject_ed = (EditText)findViewById(R.id.ed_subject_email);
message_ed = (EditText)findViewById(R.id.ed_msg_body);
subject_tv = (TextView)findViewById(R.id.tv_subject_email);
message_tv = (TextView)findViewById(R.id.tv_msg_body);
send_btn = (Button)findViewById(R.id.btn_send_sms_email);
}
public void buttonListeners() …我是Android开发的新手.让我解释一下我的问题.我的Main活动中有一个复选框和一个Button.当我检查(即启用)我的复选框并单击其下方的我的按钮时,我将转移到另一个活动,当我在第二个活动中单击一个按钮时,我回到我的主要活动.我的问题是当我回来时,Checkbox仍然是UnChecked或Disabled.即使从第二次活动回来后,我该怎么做才能保持其状态？请帮忙.
XML布局的CheckBox部分是:
<CheckBox
android:id="@+id/ckBxAll"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="ON" />
主要活动的骨架代码:
Public class TestActivity extends Activity {
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
LayoutInflater mInflater = (LayoutInflater)getSystemService(LAYOUT_INFLATER_SERVICE);
View mMainView = mInflater.inflate(R.layout.main, null);
setContentView(mMainView);
Enable_chkbox = (CheckBox)mMainView.findViewById(R.id.ckBxAll);
if(b_onResume==true)
{
Enable_chkbox.setChecked(b_onResume);
}
Enable_chkbox.setOnCheckedChangeListener(new OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
// TODO Auto-generated method stub
//do something
});//Enable_chkbox
Compose_btn=(Button)findViewById(R.id.btnCompose);
Compose_btn.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent gotoComposeMessage=new Intent(TestActivity.this,ComposeMessage.class);
startActivity(gotoComposeMessage);
}
});
}
@Override …