Я новичок в Android разработке. Проблема фрагмента в том, что макет фрагмента в другом фрагменте не может быть показан. Я использовал почти одну неделю для поиска решения ...
Если я надуваю "gment_main2 "из MainFragment. java, он не запустился. Но если я надуваю «frag_checker. xml», это нормально. Любой совет, спасибо большое!
Структура выглядит следующим образом:
MainActivity. java (Создать и показать MainFragment)
package a3.webchecker;
import android.os.Bundle;
import androidx.appcompat.app.AppCompatActivity;
import androidx.fragment.app.Fragment;
import androidx.fragment.app.FragmentManager;
import androidx.fragment.app.FragmentTransaction;
public class MainActivity extends AppCompatActivity {
public StringBuilder log = new StringBuilder("Web Checker Log:\n");
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.fragment_main2);
Fragment fragment = new MainFragment();
FragmentManager fragmentManager = getSupportFragmentManager();
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
fragmentTransaction.add(R.id.fragment_container, fragment)
.addToBackStack(null)
.commit();
}
}
MainFragment. java (Inflategment_main2. xml)
package a3.webchecker;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import androidx.fragment.app.Fragment;
public class MainFragment extends Fragment {
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_main2, container, false);
return view;
}
}
activity_main. xml (содержит контейнер FrameLayout)
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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"
android:padding="8dp"
tools:context=".MainActivity">
<FrameLayout
android:id="@+id/fragment_container"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</LinearLayout>
frag_main2. xml (содержит вкладку Fragment & layout использует fragChecker. xml)
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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"
android:orientation="vertical"
tools:context=".MainFragment">
<fragment
android:id="@+id/web_checker_1"
android:name="a3.webchecker.CheckerFragment"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_marginBottom="8dp"
android:layout_weight="1"
tools:layout="@layout/fragment_checker" />
<Button
android:id="@+id/view_log"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="View Log" />
</LinearLayout>
frag_checker. xml (Layout)
<?xml version="1.0" encoding="utf-8"?>
<androidx.cardview.widget.CardView 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"
app:cardUseCompatPadding="true"
app:contentPadding="8dp">
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
tools:context=".CheckerFragment">
<TextView
android:id="@+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="URL:"
app:layout_constraintBaseline_toBaselineOf="@+id/url"
app:layout_constraintStart_toStartOf="parent" />
<EditText
android:id="@+id/url"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:ems="10"
android:inputType="textPersonName"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="1.0"
app:layout_constraintStart_toEndOf="@+id/textView"
app:layout_constraintTop_toTopOf="parent" />
<TextView
android:id="@+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Status: "
app:layout_constraintBaseline_toBaselineOf="@+id/status"
app:layout_constraintStart_toStartOf="parent" />
<TextView
android:id="@+id/status"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginTop="8dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toEndOf="@+id/textView2"
app:layout_constraintTop_toBottomOf="@+id/url" />
<Button
android:id="@+id/check"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="8dp"
android:text="Check"
app:layout_constraintEnd_toStartOf="@+id/go_to"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintHorizontal_chainStyle="spread"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/status" />
<Button
android:id="@+id/go_to"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Go to"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintStart_toEndOf="@+id/check"
app:layout_constraintTop_toTopOf="@+id/check" />
</androidx.constraintlayout.widget.ConstraintLayout>
</androidx.cardview.widget.CardView>