Question

我有一个包含searchview的操作栏。当用户单击搜索按钮并折叠搜索视图时，操作栏会在左侧显示后退按钮。

enter image description here

我们如何检测用户何时点击此后退按钮？

修改

根据答案我检查了OnOptionsItemSelected，但它没有打电话。这是我OnOptionsItemSelected的代码：

@Override
public boolean onOptionsItemSelected(MenuItem item) {

    // Handle action bar item clicks here. The action bar will
    // automatically handle clicks on the Home/Up button, so long
    // as you specify a parent activity in AndroidManifest.xml.
    int id = item.getItemId();

    if (item != null && id == android.R.id.home) {
        if (mNavigationDrawerFragment.isDrawerOpen(Gravity.RIGHT)) {
            mNavigationDrawerFragment.closeDrawer(Gravity.RIGHT);
        } else {
            mNavigationDrawerFragment.openDrawer(Gravity.RIGHT);

        }
        return true;
    }
    if (id == R.id.action_search) {
        return true;
    }
    return super.onOptionsItemSelected(item);
}

Answer 1

将它放在onCreateOptionsMenu方法上：

MenuItemCompat.setOnActionExpandListener(menu.findItem(R.id.action_search), new MenuItemCompat.OnActionExpandListener() {
    @Override
    public boolean onMenuItemActionExpand(MenuItem item) {

        return true;
    }

    @Override
    public boolean onMenuItemActionCollapse(MenuItem item) {

        //DO SOMETHING WHEN THE SEARCHVIEW IS CLOSING

        return true;
    }
});

Answer 2

您应该为manifest.xml添加元数据，以用于您想要的活动

喜欢

<activity
        android:name=".Example"
        android:label="@string/Example"
        android:theme="Theme.AppCompat.Light">
        <meta-data
            android:name="android.support.PARENT_ACTIVITY"
            android:value=".MainActivity" />
    </activity>

并且您的代码在示例中应该是这样的

 @Override
 protected void onCreate(Bundle savedInstanceState) {
 .......
         getActionBar().setDisplayHomeAsUpEnabled(true);

......
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
    switch (item.getItemId()) {
        // Respond to the action bar's Up/Home button
        case android.R.id.home:
            NavUtils.navigateUpFromSameTask(this);
            return true;
    }
    return super.onOptionsItemSelected(item);
}

Answer 3

只需覆盖以下方法即可。

@Override
    public boolean onOptionsItemSelected(MenuItem item) {
            switch (item.getItemId()) {
            case android.R.id.home:
             //do whatever you want to do here.

            }
            return true;
    }

Answer 4

尝试此操作：使用OnQueryTextListener而不是使用onOptionsItemSelected来检测搜索更改。然后使用后退按钮（以及查询文本更改的任何其他时间）调用onQueryTextChanged。

设置菜单时，将searchView分配给监听器。每当搜索条件发生变化时（在除搜索按钮之外的任何键盘按下）都会调用onQueryTextChange，并且当按下后退按钮时，将使用空白字符串调用它。当在键盘上按下搜索按钮时，将调用onQueryTextSubmit。

@Override
public boolean onCreateOptionsMenu(Menu menu) {

    getMenuInflater().inflate(R.menu.main, menu);

    final SearchView searchView = (SearchView)menu.findItem(R.id.action_search).getActionView();
    searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
        @Override
        public boolean onQueryTextSubmit(String s) {
            Log.i(TAG,"onQueryTextSubmit: " + s);
            searchView.clearFocus();
            return true;
        }

        @Override
        public boolean onQueryTextChange(String s) {
            Log.i(TAG,"onQueryTextChange: " + s);
            FragmentManager fragmentManager = getSupportFragmentManager();
            Fragment fragment = fragmentManager.findFragmentByTag(currentFragmentTag);
            if (fragment.getClass().getName().startsWith("com.mydomain.myapp.mainactivity.MyFragment")) {
                if (s.isEmpty()) {
                    ((SingleICPListFragment)fragment).clearSearchCriteria();
                } else {
                    ((SingleICPListFragment) fragment).applySearchCriteria(s);
                }
            }
            return true;
        }
    });

    SearchManager searchManager = (SearchManager)getSystemService(Context.SEARCH_SERVICE);
    searchView.setSearchableInfo(searchManager.getSearchableInfo(getComponentName()));

    return true;
}

Answer 5

可能的doio.c副本

无论如何：

Toolbar toolbar = findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);

        getSupportActionBar().setDisplayHomeAsUpEnabled(true);


        toolbar.setNavigationOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                //Do what you want to do
            }
        });

检测到操作栏后退按钮的点击 - （单击操作栏后退按钮时OnOptionsItemSelected未调用）

5 个答案: