以dispatchKeyEvent為例

1、創(chuàng)建回調(diào)接口FragmentKeyeventListener

/*** 作者：created by meixi* 郵箱：13164716840@163.com* 日期：2018/9/10 15*/ public interface FragmentKeyeventListener {boolean onFragmentKeyEvent(KeyEvent event); }

2、fragment實(shí)現(xiàn)接口

public class TestFragment extends Fragment implements FragmentKeyeventListener{

TestActivity testActivity ;

@Override

public void onAttach(Activity activity) {

super.onAttach(activity); testActivity = (TestActivity)activity;

testActivity.setFragmentKeyeventListener(this); //設(shè)置監(jiān)聽

}

@Override

public boolean onFragmentKeyEvent(KeyEvent event) {//實(shí)現(xiàn)回調(diào)方法

return false;

}

}

3、activity代碼，通過接口把dispatchKeyEvent事件傳遞到fragment

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FragmentKeyeventListener fragmentKeyeventListener;public void setFragmentKeyeventListener(FragmentKeyeventListener fragmentKeyeventListener) {this.fragmentKeyeventListener = fragmentKeyeventListener; }@Override public boolean dispatchKeyEvent(KeyEvent event) {//防止該方法執(zhí)行兩次if(event.getKeyCode() == 66 && event.getAction() != KeyEvent.ACTION_UP) {//不響應(yīng)按鍵抬起時(shí)的動(dòng)作return false}if (fragmentKeyeventListener!=null&&event.getKeyCode()==66){fragmentKeyeventListener.onFragmentKeyEvent(event);return true;}return super.dispatchKeyEvent(event); }

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