组件间通信
-
EventBus实现通信
在Activity注册EventBus,在Activity写入消息订阅接收消息,在fragment发送消息。
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
EventBus.getDefault().register(this);
}
@Override
protected void onDestroy() {
super.onDestroy();
EventBus.getDefault().unregister(this);
}
@Subscribe(threadMode = ThreadMode.MAIN)
public void onEvent(String message) {
mViewPager.setCurrentItem(0);
mTab.setCurrentTab(0);
}
在fragment发送消息
btn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
EventBus.getDefault().post("000000");
}
});
- 接口回调
在fragment定义接口,并为接口赋值,Interface = (getActivity())interface.
在Activity实现接口即可。
ISubmit iSubmit;//定义接口对象
public interface ISubmit {
void refresh();
}
interfaceBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
iSubmit = (ISubmit) getActivity();
iSubmit.refresh();
}
});
在Activity实现接口即可
public class MainActivity extends BaseActivity implements MessageFragment.ISubmit {
@Override
public void refresh() {
Toast.makeText(getApplicationContext(), "刷新了", Toast.LENGTH_LONG).show();
}
}
- Handler消息
在Activity创建handler对象,创建获取handler对象方法,在fragment中将getActivity()强转成当前Activity,再获取Handler对象,发送消息。
public Handler handler = new Handler(){
@Override
public void handleMessage(Message msg) {
super.handleMessage(msg);
switch (msg.what) {
case 100:
Toast.makeText(getApplicationContext(), "刷新了handler", Toast.LENGTH_LONG).show();
mViewPager.setCurrentItem(0);
mTab.setCurrentTab(0);
break;
}
}
};
public Handler getHandler(){
return handler;
}
在fragment中
handler = ((MainActivity) mActivity).getHandler();
handlerBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Message message = new Message();
message.what = 100;
handler.sendMessage(message);
}
});