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需求:Activity傳遞數據給Fragment
問題:界面之間傳遞數據在開發中是經常遇到的一種情況,如果是Actvity之間傳遞咱們可以用Intent,非常方便。但是,Activity傳遞數據給Fragment還能用Intent嗎?答案是顯然是否定的,Fragment不能用Intent,所以,咱們該如何傳遞數據呢?我採用的是回調的方法。
思路:①在Fragment創建一個方法,且爲setData(OrderDetail data)
②在Activity中實例化該Fragment,通過該實例調用setData()方法,並將數據傳進去。
網上看了一些關於Java回調函數的解釋,下面貼出來給大家看看。有興趣可以去看看點擊打開鏈接
首先說說什麼叫回調函數(網上查詢了一些資料,對它的解說還是比較全面,但是很難理解,特別是在JAVA當中實現回調函數,不理解什麼叫回調函數的,就更難實現了),以下介紹根據網上的資料整合而成。
在WINDOWS中,程序員想讓系統DLL調用自己編寫的一個方法,於是利用DLL當中回調函數(CALLBACK)的接口來編寫程序,使它調用,這個就稱爲回調。在調用接口時,需要嚴格的按照定義的參數和方法調用,並且需要處理函數的異步,否則會導致程序的崩潰。這樣的解釋似乎還是比較難懂,這裏舉個簡單的例子,程序員A寫了一段程序(程序a),其中預留有回調函數接口,並封裝好了該程序。程序員B要讓a調用自己的程序b中的一個方法,於是,他通過a中的接口回調自己b中的方法。目的達到。在C/C++中,要用回調函數,被掉函數需要告訴調用者自己的指針地址,但在JAVA中沒有指針,怎麼辦?我們可以通過接口(interface)來實現定義回調函數。
不廢話了,直接貼代碼,看紅色關鍵代碼。
1、Activity
<span style="color:#333333;">public class OrderDetailsActivity extends BaseActivity{
private static final String TAG = "訂單ID";
private ViewPager mPager;
private ArrayList<Fragment> fragmentsList;
private ImageView ivBottomLine;
private TextView tvInfo, tvGood;
private int currIndex = 0;
private int bottomLineWidth;
private int offset = 0;
private int position_one;
private int position_two;
private String OrderId;
private FzHttpRequest mRequest;
public OrderInfoFragment mOrderInfoFragment;
private OrderGoodsListFragment mOrderGoodsListFragment;
public OrderDetail mOrderDetail;
private TextView mTitle;
private Resources resources;
public String getOrderId() {
return OrderId;
}
public void setOrderId(String orderId) {
OrderId = orderId;
}
@Override
protected void fzOnCreate(Bundle arg0) {
setContentView(R.layout.activity_order_detail);
mTitle=(TextView) findViewById(R.id.tv_title);//標題
mTitle.setText("訂單詳情");
resources=getResources();
mRequest = FzHttpRequest.getInstance();
InitViewPager();
InitTextView();
InitWidth();
InitData();
}
@SuppressWarnings("deprecation")
public void InitData() {
//獲得訂單ID
OrderId=getIntent().getStringExtra("ORDERID");
AjaxParams params = new AjaxParams();
params.put("code", MyApplication.getInstance().getCode());
params.put("SupplierID", MyApplication.getInstance()
.getCurrentSupplierid());
params.put("orderId", getIntent().getStringExtra("ORDERID"));
System.out.println(getIntent().getStringExtra("ORDERID"));
mRequest.post(Config.GETORDERLIST, params, new SimpleFzHttpListener(
OrderDetailsActivity.this) {
@Override
public void onSuccess(Object t) {
super.onSuccess(t);
mOrderDetail = (OrderDetail) t;
if (mOrderDetail != null) {
Log.i(TAG+"DATA", mOrderDetail.toString());
</span><span style="color:#ff0000;">if (mOrderInfoFragment!=null) {
mOrderInfoFragment.setData(mOrderDetail);
}
if (mOrderGoodsListFragment!=null) {
mOrderGoodsListFragment.setData(mOrderDetail.getOrderItemsIList());
}</span><span style="color:#333333;">
Log.i(TAG, mOrderDetail.toString());
} else {
ToastUtils.showLongToast("未賦值!");
}
}
@Override
public void onFailure(Throwable t, int errorNo, String strMsg) {
super.onFailure(t, errorNo, strMsg);
ToastUtils.showLongToast(strMsg);
}
},OrderDetail.class);
}</span>
<span style="color:#333333;">private void InitTextView() {
tvInfo = (TextView) findViewById(R.id.tv_tab_info);
tvGood = (TextView) findViewById(R.id.tv_tab_good);
tvInfo.setTextColor(resources.getColor(R.color.lightwhite));
tvInfo.setOnClickListener(new MyOnClickListener(0));
tvGood.setOnClickListener(new MyOnClickListener(1));
}
private void InitViewPager() {
mPager = (ViewPager) findViewById(R.id.vPager);
fragmentsList = new ArrayList<Fragment>();
</span><span style="color:#ff0000;">mOrderInfoFragment = new OrderInfoFragment();
mOrderGoodsListFragment =new OrderGoodsListFragment();</span><span style="color:#333333;">
fragmentsList.add(mOrderInfoFragment);
fragmentsList.add(mOrderGoodsListFragment);
mPager.setAdapter(new MyFragmentPagerAdapter(getSupportFragmentManager(), fragmentsList));
mPager.setCurrentItem(0);
mPager.setOnPageChangeListener(new MyOnPageChangeListener());
}</span>
2、Fragment
<span style="color:#333333;">/**
* 訂單的詳細信息界面(不包括商品信息)
*
* @author Endoon 2015-6-12 11:32:59
*/
public class OrderInfoFragment extends BaseFragment {
private TextView mOrderId;
private TextView mOrderTime;
private TextView mOrderUsername;
private TextView mOrderAdress;
private TextView mOrderMoney;
private TextView mOrderPhone;
public OrderInfoFragment infoFragment;
</span><span style="color:#ff0000;">public OrderDetail mData;</span><span style="color:#333333;">
public OrderInfoFragment() {
super();
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
@Override
protected View inflaterView(LayoutInflater arg0, ViewGroup arg1, Bundle arg2) {
return arg0.inflate(R.layout.fragment_order_good, null);
}
@Override
protected void initView(View view) {
super.initView(view);
mOrderId = (TextView) view.findViewById(R.id.tv_order_detail_id);
mOrderTime = (TextView) view.findViewById(R.id.tv_order_detail_time);
mOrderUsername = (TextView) view.findViewById(R.id.tv_order_detail_username);
mOrderAdress = (TextView) view.findViewById(R.id.tv_order_detail_address);
mOrderMoney = (TextView) view.findViewById(R.id.tv_order_detail_money);
mOrderPhone = (TextView) view.findViewById(R.id.tv_order_detail_phone);
}
</span><span style="color:#ff0000;">public void setData(OrderDetail data)
{
this.mData = data;
if (mData!=null)
{</span><span style="color:#333333;">
mOrderId.setText(mData.getOrderId());
mOrderUsername.setText(mData.getUsername());
String orderTime=getDateToStr(mData.getOrderDate(), "yyyy-MM-dd HH:mm");
mOrderTime.setText(orderTime);
mOrderAdress.setText(mData.getAddress());
mOrderMoney.setText("¥"+mData.getOrderTotal()+"(運費 3 元)");
mOrderPhone.setText(mData.getCellPhone());
mOrderPhone.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// 調到撥號界面
Uri uri = Uri.parse("tel:"+mData.getCellPhone());
Intent intent = new Intent(Intent.ACTION_CALL, uri);
startActivity(intent);
}
});
}
</span><span style="color:#ff0000;">}</span><span style="color:#333333;">
private String getDateToStr(String str, String format) {
try {
str = str.replace("/Date(", "").replace(")/", "");
Log.i("try", str);
SimpleDateFormat _format = new SimpleDateFormat(format);
Long time = new Long(str);
String d = _format.format(time);
Date date = _format.parse(d);
return _format.format(date);
} catch (Exception e) {
e.printStackTrace();
return "";
}
}
}</span>
O(∩_∩)O哈哈~歡迎各種吐槽、鄙視、指教、交流......
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