操作栏检测片段中的后退按钮单击

时间:2015-03-19 06:44:56

标签: android android-fragments android-actionbar-compat

我有一个片段,其中启用了操作栏后退按钮。

代码:

@Override
    public void onAttach(Activity activity) {
        super.onAttach(activity);
        setHasOptionsMenu(true);
        actionBar = ((MainActivity)getActivity()).getSupportActionBar();
        actionBar.setDisplayHomeAsUpEnabled(true);

        actionBar.setCustomView(R.layout.custom_action_bar);
        actionBar.setDisplayShowTitleEnabled(false);
        actionBar.setDisplayShowCustomEnabled(true);
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        mInflater = (LayoutInflater) getActivity().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        View view = mInflater.inflate(R.layout.fragment_layout, container, false);

        return view;
    }

在上面的代码actionBar.setDisplayHomeAsUpEnabled(true);中启用操作栏中的后退按钮,但我们如何检测其上的点击?

我已经研究过很多例子并试过以下但仍然没有工作:

在片段中:

@Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
        case android.R.id.home:
            Toast.makeText(getActivity(), "Back", Toast.LENGTH_LONG).show();
            break;
        default:
            break;
        }
        return super.onOptionsItemSelected(item);
    }

片段中显示的后退按钮是黑色,我需要白色或自定义颜色,我怎么能改变呢?

3 个答案:

答案 0 :(得分:3)

迟到总比没有好,请试试这个>

 @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        mInflater = (LayoutInflater) getActivity().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        View view = mInflater.inflate(R.layout.fragment_layout, container, false);
        //set setHasOptionsMenu on true here on CreateView method
        setHasOptionsMenu(true);
        return view;
    }

并实施

@Override
public boolean onOptionsItemSelected(MenuItem item){
            if (item.getItemId() == android.R.id.home) {
                if (getActivity() != null) {
                    getActivity().onBackPressed();
                }
                return true;
            };
            return super.onOptionsItemSelected(item);
 }

答案 1 :(得分:2)

我遇到了同样的问题,但后来我把这个代码放在了活动中,后面的按钮在片段里面工作了:

for

答案 2 :(得分:-1)

View cView = getLayoutInflater().inflate(R.layout.header, null);
cView.findViewById(R.id.btn_id).setOnClickListener(new OnClickListener() {
    @Override
    public void onClick(View v) {
                     // Do stuff here.
    }
});
actionBar.setCustomView(cView);