Android通讯录开发之实现删除功能，rxjava原理面试
作者：互联网
// 当用户打开菜单的时候触发
@Override
public boolean onMenuOpened(int featureId, Menu menu) {
if (menu != null) {
refreshSelectAllItemIcon();
}
return super.onMenuOpened(featureId, menu);
}
/**
- menu的点击事件
*/
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.select_all_item:
if (isAllChecked) { // 反选
item.setIcon(R.drawable.select_all_not);
invertSelection();
} else { // 全选
if (contactList.size() == 0) {
Toast.makeText(this, “目前没有可选的联系人”, Toast.LENGTH_SHORT)
.show();
break;
}
item.setIcon(R.drawable.select_all);
selectAllContacts();
}
break;
case R.id.delete_item: // 删除
if (count == 0) {
Toast.makeText(this, “您还没有选择任何联系人”, Toast.LENGTH_SHORT).show();
break;
}
showDeleteDialog(this, “您确定要删除吗”);
isAllChecked = false;
selectAllItem.setIcon(R.drawable.select_all_not);
break;
case R.id.sync_item:
Intent fresh_intent = new Intent(this, CloudSyncActivity.class);
if (flag) {// 如果是会议
fresh_intent.putExtra(“number”, meetingNumber);
}
startActivityForResult(fresh_intent, CLOUD_SYNC);
break;
default:
break;
}
return false;
}
// 刷新菜单项全选
private void refreshSelectAllItemIcon() {
for (String contactId : map_NumberSelected.keySet()) {
《Android学习笔记总结+最新移动架构视频+大厂安卓面试真题+项目实战源码讲义》
【docs.qq.com/doc/DSkNLaERkbnFoS0ZF】 完整内容开源分享
if (!map_NumberSelected.get(contactId)) {
isAllChecked = false;
selectAllItem.setIcon(R.drawable.select_all_not);
break;
}
isAllChecked = true;
selectAllItem.setIcon(R.drawable.select_all);
}
}
提示删除的对话框
/** 显示确认删除对话框 **/
public void showDeleteDialog(Context context, String msg) {
final Dialog dialog = new Dialog(context, R.style.MyDialog);
View view = LayoutInflater.from(context).inflate(R.layout.back_dialog,
null);
TextView msg_tv = (TextView) view.findViewById(R.id.msg);
msg_tv.setText(msg);
Button sure = (Button) view.findViewById(R.id.sure);
Button cancle = (Button) view.findViewById(R.id.cancle);
dialog.setContentView(view);
sure.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
deleteContacts();
dialog.dismiss();
}
});
cancle.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
dialog.dismiss();
}
});
dialog.show();
}
下面是删除操作：
这里只关注实现删除的脉路，其中有些代码是业务逻辑需要可以稍微看一下就可以了
// 删除选中的联系人
public void deleteContacts() {
DialogHelp.getInstance().showHttpDialog(this, R.string.wait_for_while,
getString(R.string.deleting_contact));
new Thread() {
@Override
public void run() {
ArrayList deleteContacts = new ArrayList();
for (Contact contact : contactList) {
boolean isselected = map_NumberSelected
.get(contact.getId());
if (isselected) {
for (RawContact rawContact : rawList) {
if (contact.getUserId() == rawContact.getUserId()) { // 是同一个id
if (contact.getNumber() == rawContact
.getPhone1()) {
rawContact.setPhone1(null);
} else if (contact.getNumber() == rawContact
.getPhone2()) {
rawContact.setPhone2(null);
} else if (contact.getNumber() == rawContact
.getTelephone()) {
rawContact.setTelephone(null);
}
if ((rawContact.getPhone1() == null || “”
.equals(rawContact.getPhone1()))
&& (rawContact.getPhone2() == null || “”
.equals(rawContact.getPhone2()))
&& (rawContact.getTelephone() == null || “”
.equals(rawContact
.getTelephone()))) {
MyDataBase.deleteContact(
MeetingContactActivity.this,
rawContact);
} else {
MyDataBase.updateContactById(
MeetingContactActivity.this,
rawContact);
}
break;
}
}
// 将需要删除的联系人保存下来
deleteContacts.add(contact);
}
}
Message msg = new Message();
msg.obj = deleteContacts;
msg.what = DELETE_COMPLETE;
handler.sendMessage(msg);
};
}.start();
}
deleteContacts是用来保存需要删除的联系人，把它赋给msg.obj，再通过handler将消息放入消息队列，最终在handler的handleMessage方法进行删除操作。
handler处理代码：
标签：删除,break,rawContact,contact,通讯录,rxjava,Android,null,msg 来源： https://blog.csdn.net/flutter001/article/details/122155261