四大组件之间传递数据可以用广播，但是有次面试官说太重了，用eventbus代替。下面的广播传递数据方法仅当学习参考。
1.管理类
/**
* 广播管理类：注册广播、注销广播、发送广播
* @author weizh_000
* @date 2016-8-29
*/
public class BroadCastManager { private static BroadCastManager broadCastManager = new BroadCastManager(); public static BroadCastManager getInstance() {
return broadCastManager;
} //注册广播接收者
public void registerReceiver(Activity activity,
BroadcastReceiver receiver, IntentFilter filter) {
activity.registerReceiver(receiver, filter);
} //注销广播接收者
public void unregisterReceiver(Activity activity,
BroadcastReceiver receiver) {
activity.unregisterReceiver(receiver);
} //发送广播
public void sendBroadCast(Activity activity, Intent intent) {
activity.sendBroadcast(intent);
} }
2.发送广播
public class MyFragment extends Fragment {
private String orderid = "85465465";
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
//发送广播
Intent intent = new Intent();
intent.putExtra("order", orderid);
intent.setAction("fragment_home_left");
BroadCastManager.getInstance().sendBroadCast(getActivity(), intent);
return super.onCreateView(inflater, container, savedInstanceState);
}
}
3.接收广播
public class MainActivity extends ActionBarActivity {
private LocalReceiver mReceiver;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//接收广播
try {
IntentFilter filter = new IntentFilter();
filter.addAction("fragment_home_left");
mReceiver = new LocalReceiver();
BroadCastManager.getInstance().registerReceiver(this,
mReceiver, filter);//注册广播接收者
} catch (Exception e) {
e.printStackTrace();
}
}
class LocalReceiver extends BroadcastReceiver{
@Override
public void onReceive(Context context, Intent intent) {
//收到广播后的处理
String orderid = intent.getStringExtra("order");
loadData(orderid);
}
}
private void loadData(String orderid){
}
@Override
protected void onDestroy() {
BroadCastManager.getInstance().unregisterReceiver(this,mReceiver);//注销广播接收者
super.onDestroy();
}
}
上面的例子是fragment传递数据给Activity，其实Activity也可以通过广播的方式传递数据给fragment，还有fragment与fragment之间也可以这样传数据。