Android 从片段遍历到片段底部导航视图图标高亮显示

我正在尝试实现一个BottomNavigationView，到目前为止已经成功了。目前正在尝试实现片段到片段的移动，这也很成功，但不知何故，当我从一个片段[radio]移动到另一个[stream]时，导航栏应该高亮显示图标[stream]，但它没有发生。我有没有办法通过片段本身设置高亮显示属性？ 下面是我的应用程序的代码和快照：

MainActivity.java

import android.support.annotation.NonNull;
import android.support.design.widget.BottomNavigationView;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.MenuItem;
import android.view.View;
import android.widget.TextView;
import com.br.tron.bottombar.RadioFragment;
import com.br.tron.bottombar.StreamFragment;
import com.br.tron.bottombar.InfoFragment;

public class MainActivity extends AppCompatActivity {

    BottomNavigationView bottomNavigationView;
    private Fragment fragment;
    private FragmentManager fragmentManager;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        fragmentManager = getSupportFragmentManager();
        fragment = new RadioFragment();
        final FragmentTransaction transaction = fragmentManager.beginTransaction();
        transaction.add(R.id.main_container, fragment).commit();

        bottomNavigationView = (BottomNavigationView) findViewById(R.id.bottomNavigationBar);
        bottomNavigationView.setOnNavigationItemSelectedListener(new BottomNavigationView.OnNavigationItemSelectedListener(){
            @Override
            public boolean onNavigationItemSelected(@NonNull MenuItem item) {

                switch (item.getItemId()) {
                    case R.id.nav_button_one:
                        fragment = new RadioFragment();
                        break;
                    case R.id.nav_button_two:
                        fragment = new StreamFragment();
                        break;
                    case R.id.nav_button_three:
                        fragment = new InfoFragment();
                        break;
                }
                final FragmentTransaction transaction = fragmentManager.beginTransaction();
                transaction.replace(R.id.main_container, fragment).commit();
                return true;
            }
        });
    }

    public void performStreamClick(){
        View view = bottomNavigationView.findViewById(R.id.main_container);
        view.performClick();
    }
}

RadioFragment.java

import android.app.Activity;
import android.content.Context;
import android.support.v4.app.Fragment;
import android.os.Bundle;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;

public class RadioFragment extends Fragment implements Button.OnClickListener  {

    Button buttonman;
    View rootView;

    Activity a;

    @Override
    public void onAttach(Context context) {
        super.onAttach(context);

        if (context instanceof Activity) {
            a = (Activity) context;
        }
    }

    public RadioFragment(){
    };

    @Override
    public View onCreateView(LayoutInflater inflater,ViewGroup container, Bundle savedInstanceState) {

        rootView = inflater.inflate(R.layout.fragment_player, container, false);
        buttonman = (Button)rootView.findViewById(R.id.buttonman);
        buttonman.setOnClickListener(this);
        return rootView;
    }

    @Override
    public void onClick(View v) {
        /*Fragment fragment = new StreamFragment();
        FragmentManager fragmentManager = getActivity().getSupportFragmentManager();
        FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
        fragmentTransaction.replace(R.id.main_container, fragment);
        fragmentTransaction.addToBackStack(null);
        fragmentTransaction.commit();*/
        ((MainActivity)a).performStreamClick();
    }
}

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;

public class StreamFragment extends Fragment {

    public StreamFragment(){};

    @Override
    public View onCreateView(final LayoutInflater inflater,final ViewGroup container,final Bundle savedInstanceState) {
        return  inflater.inflate(R.layout.fragment_stream, container, false);

    }

}

Button buttonman;
View rootView;    
Activity a;

@Override
public void onAttach(Context context) {
super.onAttach(context);

if (context instanceof Activity){
    a=(Activity) context;
}
}

public RadioFragment(){
};

@Override
public View onCreateView(LayoutInflater inflater,ViewGroup container, Bundle savedInstanceState) {

    rootView = inflater.inflate(R.layout.fragment_player, container, false);
    buttonman = (Button)rootView.findViewById(R.id.yourbuttonid); // initialize here
    buttonman.setOnClickListener(this);
    return rootView;

}
@Override
public void onClick(View v) {
   ((MainActivity)a).performStreamClick();

}

StreamFragment.java

import android.app.Activity;
import android.content.Context;
import android.support.v4.app.Fragment;
import android.os.Bundle;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;

public class RadioFragment extends Fragment implements Button.OnClickListener  {

    Button buttonman;
    View rootView;

    Activity a;

    @Override
    public void onAttach(Context context) {
        super.onAttach(context);

        if (context instanceof Activity) {
            a = (Activity) context;
        }
    }

    public RadioFragment(){
    };

    @Override
    public View onCreateView(LayoutInflater inflater,ViewGroup container, Bundle savedInstanceState) {

        rootView = inflater.inflate(R.layout.fragment_player, container, false);
        buttonman = (Button)rootView.findViewById(R.id.buttonman);
        buttonman.setOnClickListener(this);
        return rootView;
    }

    @Override
    public void onClick(View v) {
        /*Fragment fragment = new StreamFragment();
        FragmentManager fragmentManager = getActivity().getSupportFragmentManager();
        FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
        fragmentTransaction.replace(R.id.main_container, fragment);
        fragmentTransaction.addToBackStack(null);
        fragmentTransaction.commit();*/
        ((MainActivity)a).performStreamClick();
    }
}

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;

public class StreamFragment extends Fragment {

    public StreamFragment(){};

    @Override
    public View onCreateView(final LayoutInflater inflater,final ViewGroup container,final Bundle savedInstanceState) {
        return  inflater.inflate(R.layout.fragment_stream, container, false);

    }

}

Button buttonman;
View rootView;    
Activity a;

@Override
public void onAttach(Context context) {
super.onAttach(context);

if (context instanceof Activity){
    a=(Activity) context;
}
}

public RadioFragment(){
};

@Override
public View onCreateView(LayoutInflater inflater,ViewGroup container, Bundle savedInstanceState) {

    rootView = inflater.inflate(R.layout.fragment_player, container, false);
    buttonman = (Button)rootView.findViewById(R.id.yourbuttonid); // initialize here
    buttonman.setOnClickListener(this);
    return rootView;

}
@Override
public void onClick(View v) {
   ((MainActivity)a).performStreamClick();

}

---

您没有初始化

buttonman

在RadioFragment.java中

import android.app.Activity;
import android.content.Context;
import android.support.v4.app.Fragment;
import android.os.Bundle;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;

public class RadioFragment extends Fragment implements Button.OnClickListener  {

    Button buttonman;
    View rootView;

    Activity a;

    @Override
    public void onAttach(Context context) {
        super.onAttach(context);

        if (context instanceof Activity) {
            a = (Activity) context;
        }
    }

    public RadioFragment(){
    };

    @Override
    public View onCreateView(LayoutInflater inflater,ViewGroup container, Bundle savedInstanceState) {

        rootView = inflater.inflate(R.layout.fragment_player, container, false);
        buttonman = (Button)rootView.findViewById(R.id.buttonman);
        buttonman.setOnClickListener(this);
        return rootView;
    }

    @Override
    public void onClick(View v) {
        /*Fragment fragment = new StreamFragment();
        FragmentManager fragmentManager = getActivity().getSupportFragmentManager();
        FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
        fragmentTransaction.replace(R.id.main_container, fragment);
        fragmentTransaction.addToBackStack(null);
        fragmentTransaction.commit();*/
        ((MainActivity)a).performStreamClick();
    }
}

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;

public class StreamFragment extends Fragment {

    public StreamFragment(){};

    @Override
    public View onCreateView(final LayoutInflater inflater,final ViewGroup container,final Bundle savedInstanceState) {
        return  inflater.inflate(R.layout.fragment_stream, container, false);

    }

}

Button buttonman;
View rootView;    
Activity a;

@Override
public void onAttach(Context context) {
super.onAttach(context);

if (context instanceof Activity){
    a=(Activity) context;
}
}

public RadioFragment(){
};

@Override
public View onCreateView(LayoutInflater inflater,ViewGroup container, Bundle savedInstanceState) {

    rootView = inflater.inflate(R.layout.fragment_player, container, false);
    buttonman = (Button)rootView.findViewById(R.id.yourbuttonid); // initialize here
    buttonman.setOnClickListener(this);
    return rootView;

}
@Override
public void onClick(View v) {
   ((MainActivity)a).performStreamClick();

}

在

main活动中

public void performStreamClick(){
   View view = bottomNavigationView.findViewById(R.id.nav_button_two);
view.performClick();
}

注意：您也可以通过interfce进行操作

解释

您已经添加了

Fragment fragment = new StreamFragment(); 
FragmentManager fragmentManager = getActivity().getSupportFragmentManager(); 
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction(); 
fragmentTransaction.replace(R.id.main_container, fragment); 
fragmentTransaction.addToBackStack(null); 
fragmentTransaction.commit(); 

这将只需在

main_container

framelayout中推送

StreamFragment

，而不通知

bottomNavigationView

这里

此行将以编程方式在

bottomNavigationView

中单击导航按钮。。然后所有事件都将由

bottomNavigationView

处理。。然后它将突出显示

流

图标

---

我真是太傻了。。它可以工作，但是navigationView没有突出显示我应该移动到任何建议的流图标？@IterationN07，请参阅添加的答案。我认为您需要在导航菜单中设置位置，而不是插入它manually@IteratioN07，将底部视图导航设置为2位置。它将突出显示iconi实现您的第二个建议performStreamClick（）的流；现在通过使用这个，我被困在同一个片段。。。检查问题我已经用你建议的代码更新了代码。还更改了查询的主题。@IteratioN07，顺便说一句，您填写这是个坏主意，然后我们还可以在

bottomnaviationview

中对流项目执行

setselection

。。请参阅此链接