Android导航抽屉点击事件问题

Question

我正在创建一个包含导航抽屉活动的应用程序。我在我的主屏幕中加载不同的片段。现在，当我当时必须调用 Fragment 时它工作正常，但是当我想调用某种服务（如调用、图像选择器）时，我添加了 setNavigationItemSelectedListener，它工作正常，但所有其他片段现在都没有加载。

  protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Toolbar toolbar = findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);
        getSupportActionBar().setDisplayHomeAsUpEnabled(true);

        drawer = findViewById(R.id.drawer_layout);
        NavigationView navigationView = findViewById(R.id.nav_view);


        // Passing each menu ID as a set of Ids because each
        // menu should be considered as top level destinations.
        mAppBarConfiguration = new AppBarConfiguration.Builder(
                R.id.nav_home, R.id.nav_gallery, R.id.nav_slideshow, R.id.nav_franchise,
                R.id.nav_tieUP, R.id.nav_giftVoucher, R.id.nav_faq, R.id.nav_privacy_policy,
                R.id.nav_tools, R.id.nav_send)
                .setDrawerLayout(drawer)
                .build();
        NavController navController = Navigation.findNavController(this, R.id.nav_host_fragment);
        NavigationUI.setupActionBarWithNavController(this, navController, mAppBarConfiguration);
        NavigationUI.setupWithNavController(navigationView, navController);

        navigationView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() {
            @Override
            public boolean onNavigationItemSelected(@NonNull MenuItem menuItem) {

                int id = menuItem.getItemId();
                if (id == R.id.callUs) {
                    Intent intent = new Intent(Intent.ACTION_CALL);

                    intent.setData(Uri.parse("tel:" + "XXXxxxXXX"));

                    if (ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.CALL_PHONE) != PackageManager.PERMISSION_GRANTED) {
                        ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.CALL_PHONE},REQUEST_PHONE_CALL);
                    }
                    else
                    {
                        startActivity(intent);
                    }
                }

                drawer.closeDrawer(GravityCompat.START);
                return true;
            }
        });

    }

Answer 1

当您调用NavigationUI.setupWithNavController(navigationView, navController) 时，您是说您希望NavController 处理来自您的NavigationView 的点击事件，并按照the NavigationUI documentation 导航到相关屏幕。这必然会在内部调用setNavigationItemSelectedListener()。

通过调用setNavigationItemSelectedListener 之后，你删除了原来的监听器，这就是为什么你的其他项目不再做任何事情了。你可以通过调用NavigationUI.onNavDestinationSelected()来触发默认行为

@Override
public boolean onNavigationItemSelected(@NonNull MenuItem menuItem) {

    int id = menuItem.getItemId();
    if (id == R.id.callUs) {
        Intent intent = new Intent(Intent.ACTION_CALL);

        intent.setData(Uri.parse("tel:" + "XXXxxxXXX"));

        if (ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.CALL_PHONE) != PackageManager.PERMISSION_GRANTED) {
            ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.CALL_PHONE},REQUEST_PHONE_CALL);
        }
        else
        {
            startActivity(intent);
        }
   }
   else
   {
       // Make your navController object final above
       // or call Navigation.findNavController() again here
       NavigationUI.onNavDestinationSelected(menuItem, navController);
   }
   drawer.closeDrawer(GravityCompat.START);
   return true;

}

Answer 2

我尝试制作一个片段并制作了一个抽屉，这是我的代码：

导入android.support.v4.app.FragmentManager；

导入android.support.v4.app.Fragment；

导入android.content.res.Configuration；

导入android.support.design.widget.Snackbar；

导入android.support.v4.widget.DrawerLayout；

导入android.support.v7.app.ActionBarDrawerToggle；

导入android.support.v7.app.AppCompatActivity；

导入android.os.Bundle；

导入android.util.Log；

导入android.view.Menu；

导入android.view.MenuItem；

导入android.support.v7.widget.Toolbar；

导入android.support.design.widget.NavigationView；

导入android.view.View；

导入android.widget.LinearLayout；

导入android.widget.RelativeLayout；

公共类 MainActivity 扩展 AppCompatActivity 实现 View.OnClickListener、NavigationView.OnNavigationItemSelectedListener{

私有工具栏 mToolBar;

私有 NavigationView mDrawer;

私有 ActionBarDrawerToggle mdrawerToggle;

私有 DrawerLayout mDrawerLayout;

私有RelativeLayout数字前沿；

私有RelativeLayout forwardThinkers;

私有RelativeLayoutpreferedActions;

private LinearLayout innerParent;

公共字符串视图变量；

@覆盖 protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);


initViews();

digitalFrontier.setOnClickListener(this);

forwardThinkers.setOnClickListener(this);

preferedActions.setOnClickListener(this);

}

@覆盖 public boolean onCreateOptionsMenu(Menu menu) {

// Inflate the menu; this adds items to the action bar if it is present.

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

return true;

}

@覆盖 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();

//noinspection SimplifiableIfStatement

if (id == R.id.action_settings) {

    return true;

}

return super.onOptionsItemSelected(item);

}

@覆盖 public void onConfigurationChanged(Configuration newConfig) {

super.onConfigurationChanged(newConfig);

mdrawerToggle.onConfigurationChanged(newConfig);

}

private void initViews(){

mToolBar = (Toolbar) findViewById(R.id.app_bar);

setSupportActionBar(mToolBar);

mDrawer = (NavigationView) findViewById(R.id.main_drawer);

mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_parent);

mdrawerToggle = new ActionBarDrawerToggle(

        this,
        mDrawerLayout,
        mToolBar,
        R.string.drawer_open,
        R.string.drawer_close);

mDrawerLayout.setDrawerListener(mdrawerToggle);

// indicator based on whether the drawerlayout is in open or closed

mdrawerToggle.syncState();

digitalFrontier = (RelativeLayout) findViewById(R.id.digital_frontier);

forwardThinkers = (RelativeLayout) findViewById(R.id.forward_thinkers);

preferedActions = (RelativeLayout) findViewById(R.id.prefered_actions);

innerParent = (LinearLayout) findViewById(R.id.inner_parent);

mDrawer.setNavigationItemSelectedListener(this);

}

@覆盖 public void onClick(View v) {

if(v.getId() == R.id.digital_frontier || v.getId() == R.id.forward_thinkers ||

        v.getId() == R.id.prefered_actions ){

    detailActivity(v);
}

}

private void detailActivity(View view){

switch (view.getId()){

    case R.id.digital_frontier:

        viewVar = "digital frontier";

        break;
    case R.id.forward_thinkers:

        viewVar = "forward thinkers";
        break;

    case R.id.prefered_actions:

        viewVar = "prefered actions";
        break;
}

Snackbar.make(mDrawerLayout, viewVar , Snackbar.LENGTH_LONG).show();

}

@覆盖 public boolean onNavigationItemSelected(MenuItem menuItem) {

selectDrawerItem(menuItem);

return false;

}

public void selectDrawerItem(MenuItem menuItem) {

// Create a new fragment and specify the planet to show based on
// position
Fragment fragment = null;

Class fragmentClass = null;

switch(menuItem.getItemId()) {

    case R.id.agency_menu_item:

        fragmentClass = FragmentAgency.class;

        break;
}

try {
    fragment = (Fragment) fragmentClass.newInstance();
} catch (Exception e) {
    e.printStackTrace();
}

// Insert the fragment by replacing any existing fragment
FragmentManager fragmentManager = this.getSupportFragmentManager();

fragmentManager.beginTransaction().replace(R.id.fragment_content, 

片段).commit();

// Highlight the selected item, update the title, and close the drawer
menuItem.setChecked(true);

setTitle(menuItem.getTitle());

//mDrawer.closeDrawers();

}