Ändern Fragmente, wenn die Schaltfläche geklickt wird

So ändern Sie die Fragmente, wenn die Schaltfläche geklickt wird? Ich bin mit android studio 1.5 und mit der neuen navigation drawer.

Das ist mein MainActivity.java

import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.view.View;
import android.support.design.widget.NavigationView;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;

public class MainActivity extends AppCompatActivity
        implements NavigationView.OnNavigationItemSelectedListener {

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

        FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
        fab.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Snackbar.make(view, "[email protected]", Snackbar.LENGTH_LONG)
                        .setAction("Action", null).show();
            }
        });

        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
        ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
                this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
        drawer.setDrawerListener(toggle);
        toggle.syncState();

        NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
        navigationView.setNavigationItemSelectedListener(this);
    }

    @Override
    public void onBackPressed() {
        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
        if (drawer.isDrawerOpen(GravityCompat.START)) {
            drawer.closeDrawer(GravityCompat.START);
        } else {
            super.onBackPressed();
        }
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        //Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    @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();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }

    @SuppressWarnings("StatementWithEmptyBody")
    @Override
    public boolean onNavigationItemSelected(MenuItem item) {
        int id = item.getItemId();
        Fragment fragment;

        if (id == R.id.nav_cough) {
             fragment = new first();
            FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
            ft.replace(R.id.mainFrame, fragment);
            ft.commit();
        }
        else if (id == R.id.nav_colds) {
              fragment = new second();
            FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
            ft.replace(R.id.mainFrame, fragment);
            ft.commit();
        }
        else if (id == R.id.nav_fever) {
            fragment = new third();
            FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
            ft.replace(R.id.mainFrame, fragment);
            ft.commit();
        }
        else if (id == R.id.nav_vegetables) {
            fragment = new fourth();
            FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
            ft.replace(R.id.mainFrame, fragment);
            ft.commit();
        } else if (id == R.id.nav_fruits) {
            fragment = new fifth();
            FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
            ft.replace(R.id.mainFrame, fragment);
            ft.commit();
        } else if (id == R.id.nav_about) {
            fragment = new sixth();
            FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
            ft.replace(R.id.mainFrame, fragment);
            ft.commit();
        }
        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
        drawer.closeDrawer(GravityCompat.START);
        return true;
    }
}

Das ist mein activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/drawer_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fitsSystemWindows="true"
    tools:openDrawer="start">

    <include
        layout="@layout/app_bar_main"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

    <android.support.design.widget.NavigationView
        android:id="@+id/nav_view"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:layout_gravity="start"
        android:fitsSystemWindows="true"
        app:headerLayout="@layout/nav_header_main"
        app:menu="@menu/activity_main_drawer" />

</android.support.v4.widget.DrawerLayout>

content_main.xml dies ist, wo mein framelayout ist

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    app:layout_behavior="@string/appbar_scrolling_view_behavior"
    tools:context="appnaturemedicine.com.example.posvoc.naturesmedicine.MainActivity"
    tools:showIn="@layout/app_bar_main"
    android:background="@drawable/background">

    <FrameLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent" android:id="@+id/mainFrame">
    </FrameLayout>        
</RelativeLayout>

Ich bin in der Lage zu gehen, um das fragment, das ich will, das problem ist, dass, wie kann ich die buttons in das fragment im in an so ändern Sie das aktuelle fragment, wenn auf Sie geklickt

hier ist meine erste fragment, wenn ich auf einen der Menüpunkte in der navigationdrawer

fragment_first.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="appnaturemedicine.com.example.posvoc.naturesmedicine.first">


    <ImageView
        android:layout_width="80dp"
        android:layout_height="80dp"
        android:id="@+id/imageView2"
        android:layout_alignParentTop="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:background="@mipmap/ic_launcher_cough" />

    <Button
        android:layout_width="80dp"
        android:layout_height="30dp"
        android:id="@+id/button"
        android:layout_alignBottom="@+id/textView3"
        android:layout_alignParentRight="true"
        android:layout_alignParentEnd="true"
        android:onClick="onButtonClicked"
        />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceMedium"
        android:text="Lagundi (Vitex negundo)"
        android:id="@+id/textView3"
        android:textColor="#ff4081"
        android:layout_below="@+id/imageView3"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true" />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceMedium"
        android:text="Honey"
        android:id="@+id/textView4"
        android:textColor="#ff4081"
        android:layout_alignBottom="@+id/button3"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true" />

    <Button
        android:layout_width="80dp"
        android:layout_height="30dp"
        android:id="@+id/button3"
        android:layout_below="@+id/button"
        android:layout_alignParentRight="true"
        android:layout_alignParentEnd="true" />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceMedium"
        android:text="Probiotics"
        android:id="@+id/textView5"
        android:layout_alignBottom="@+id/button4"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_toLeftOf="@+id/button4"
        android:textColor="#ff4081"
        android:layout_toStartOf="@+id/button4" />

    <Button
        android:layout_width="80dp"
        android:layout_height="30dp"
        android:id="@+id/button4"
        android:layout_below="@+id/textView4"
        android:layout_alignParentRight="true"
        android:layout_alignParentEnd="true" />

    <Button
        android:layout_width="80dp"
        android:layout_height="30dp"
        android:id="@+id/button5"
        android:layout_below="@+id/button4"
        android:layout_alignParentRight="true"
        android:layout_alignParentEnd="true" />

    <Button
        android:layout_width="80dp"
        android:layout_height="30dp"
        android:id="@+id/button6"
        android:layout_alignParentRight="true"
        android:layout_alignParentEnd="true"
        android:layout_below="@+id/button5" />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceMedium"
        android:text="Bromelain"
        android:id="@+id/textView6"
        android:textColor="#ff4081"
        android:layout_alignBaseline="@+id/button5"
        android:layout_alignBottom="@+id/button5"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true" />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceMedium"
        android:text="Peppermint"
        android:id="@+id/textView7"
        android:textColor="#ff4081"
        android:layout_alignBaseline="@+id/button6"
        android:layout_alignBottom="@+id/button6"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true" />

    <ImageView
        android:layout_width="250dp"
        android:layout_height="110dp"
        android:id="@+id/imageView3"
        android:background="@drawable/ben"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true" />
</RelativeLayout>

first.java

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


/**
 * A simple {@link Fragment} subclass.
 */
public class first extends Fragment {


    public first() {
        //Required empty public constructor
    }


    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        //Inflate the layout for this fragment
        return inflater.inflate(R.layout.fragment_first, container, false);
    }

}

Können Sie machen es zu etwas, wie wenn Sie auf btn1 es geht um fragmentOne und wenn Sie auf btn2 es geht um fragmentTwo eine if-else-Anweisung?

Was mache ich hier?

InformationsquelleAutor POSVOC | 2016-01-23

Können Sie OnfragmentInteractionListener für diese. Es ist eine Schnittstelle, die Ihre Aktivität implementieren sollten. Man kann die Methoden aufrufen, die von Ihrer Fragmente und es wird so sein wie es ist Aufruf einer Methode von der Aktivität.

Im folgenden Beispiel ersten fragment hat eine Schaltfläche, die beim anklicken die Methode aufruft, changeFragment(2) und ebenso die zweiten fragment ruft die Methode changeFragment(1). Diese Methode ist implementiert in der Haupt-Aktivität und durch if .. else es Figuren aus dem fragment zu ersetzen.

OnFragmentInteractionListener.java

public interface OnFragmentInteractionListener {
        public void changeFragment(int id);
}

FragmentA:

public class first extends Fragment {

    private OnFragmentInteractionListener mListener;

    public first() {
        //Required empty public constructor
    }


    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        //Inflate the layout for this fragment
        View view = inflater.inflate(R.layout.fragment_first, container, false);
        Button btn = (Button) view.findViewById(R.id.btn);
        btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                mListener.changeFragment(2);
            }
        });
        return view;
    }

    @Override
    public void onAttach(Activity activity) {
        super.onAttach(activity);
        try {
            mListener = (OnFragmentInteractionListener) activity;
        } catch (ClassCastException e) {
            throw new ClassCastException(activity.toString()
                + " must implement OnFragmentInteractionListener");
        }
    }

    @Override
    public void onDetach() {
        super.onDetach();
        mListener = null;

    }

}

FragmentB:

public class first extends Fragment {

    private OnFragmentInteractionListener mListener;

    public first() {
        //Required empty public constructor
    }


    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        //Inflate the layout for this fragment
        View view = inflater.inflate(R.layout.fragment_first, container, false);
        Button btn = (Button) view.findViewById(R.id.btn);
        btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                mListener.changeFragment(1);
            }
        });
        return view;
    }

    @Override
    public void onAttach(Activity activity) {
        super.onAttach(activity);
        try {
            mListener = (OnFragmentInteractionListener) activity;
        } catch (ClassCastException e) {
            throw new ClassCastException(activity.toString()
                + " must implement OnFragmentInteractionListener");
        }
    }

    @Override
    public void onDetach() {
        super.onDetach();
        mListener = null;

    }

}

MainActivity:

public class MainActivity extends AppCompatActivity
    implements NavigationView.OnNavigationItemSelectedListener, OnFragmentInteractionListener {

    //Rest of the code

    @Override
    public void changeFragment(int id){
        if (id == 1) {
            fragment = new first();
            FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
            ft.replace(R.id.mainFrame, fragment);
            ft.commit();
        }
        else if (id == 2) {
            fragment = new second();
            FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
            ft.replace(R.id.mainFrame, fragment);
            ft.commit();
        }
    }
}

Hoffe, es hilft!!

das nicht verstehen 🙁 kannst du es etwas wie wenn Sie auf btn1 es geht um fragmentOne und wenn Sie auf btn2 es geht um fragmentTwo eine if-else-Anweisung, bitte genauer zu sein im neuen 🙁 danke
Seine arbeitete für mich!!! Danke.

InformationsquelleAutor P. Jairaj

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