我试图让mainactivity中插入列表视图的字符串通过一个bundle传递到列表视图片段中,但是按下按钮什么也做不了。我不确定是哪里出了问题,因为它以前显示的是片段,但没有传递数据(而且它与活动布局重叠)。
主活动.java
import androidx.fragment.app.Fragment;;
import android.os.Bundle;
import android.provider.Telephony;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
import androidx.appcompat.app.AppCompatActivity;
import androidx.fragment.app.FragmentManager;
import androidx.fragment.app.FragmentTransaction;
import org.w3c.dom.Text;
import java.util.ArrayList;
public class MainActivity extends AppCompatActivity {
public Button login;
public EditText name;
public EditText email;
public EditText address;
String Name;
String Email;
String Address;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
login = (Button) findViewById(R.id.button);
name = (EditText) findViewById(R.id.name);
email = (EditText) findViewById(R.id.email);
address = (EditText) findViewById(R.id.address);
//try {
// Thread.sleep(5000);
//} catch (InterruptedException e) {
// e.printStackTrace();
// }
Name = name.getText().toString();
Email = email.getText().toString();
Address = address.getText().toString();
login.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
Fragment fragment = new ListViewFragment();
Bundle args = new Bundle();
args.putString("Name", Name);
args.putString("Email", Email);
args.putString("Address", Address);
fragment.setArguments(args);
getSupportFragmentManager().beginTransaction().replace(R.id.container, fragment);//, fragment, fragment.getClass().getSimpleName()).addToBackStack(null).commit();
}
});
}
private void ListViewFragment(){
// create new ListViewFragment ("ListViewFragment.java" ...)
ListViewFragment lvFragment = new ListViewFragment();
// create new FragmentManager
FragmentManager fm = getSupportFragmentManager();
// create a FragmentTransaction to begin the transaction and replace the Fragment
FragmentTransaction transaction = fm.beginTransaction();
// your animation...
transaction.setCustomAnimations(R.animator.anim1, R.animator.anim2);
// replace your activity_main layout with your Fragment layout
transaction.add(R.id.mainFrag, lvFragment);
transaction.addToBackStack("");
transaction.commit(); // save changes
/* Bundle info = new Bundle();
info.putString("name", Name);
info.putString("email", Email);
info.putString("address", Address);
Fragment fragment = new Fragment();
fragment.setArguments(info);
android.app.FragmentTransaction transaction = getFragmentManager().beginTransaction();
// transaction.setCustomAnimations(R.animator.fade_in, R.animator.fade_out);
transaction.addToBackStack(null);
transaction.replace(R.id.account, fragment);
transaction.commit();*/
}
}
主活动.xml
<androidx.constraintlayout.widget.ConstraintLayout 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/mainFrag"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<TextView
android:id="@+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="16dp"
android:text="Smart-Home Sensors System"
android:textSize="24sp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.498"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<Button
android:id="@+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.498"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.931" />
<EditText
android:id="@+id/name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="100dp"
android:ems="10"
android:inputType="textPersonName"
android:text="Name"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.497"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/textView" />
<EditText
android:id="@+id/email"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="40dp"
android:ems="10"
android:inputType="textPersonName"
android:text="Email"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.497"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/name" />
<EditText
android:id="@+id/address"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="40dp"
android:ems="10"
android:inputType="textPersonName"
android:text="Address"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.497"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/email" />
</androidx.constraintlayout.widget.ConstraintLayout>
listviewfragment.java文件
import androidx.fragment.app.Fragment;
import androidx.fragment.app.FragmentTransaction;
import android.content.Intent;
import android.graphics.Color;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
import androidx.appcompat.app.AppCompatActivity;
import androidx.fragment.app.FragmentManager;
import java.lang.reflect.Array;
import java.util.ArrayList;
import static android.provider.AlarmClock.EXTRA_MESSAGE;
public class ListViewFragment extends Fragment {
TextView nameDisp;
TextView emailDisp;
TextView addressDisp;
// String myValue = this.getArguments().getString("message");
public static ListViewFragment newInstance(String name, String email, String password) {
ListViewFragment f = new ListViewFragment();
return f;
}
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
String nname = getArguments().getString("Name");
String eemail = getArguments().getString("Email");
String aaddress = getArguments().getString("Address");
View v = inflater.inflate(R.layout.mainmenu, container, false);
nameDisp =getView().findViewById(R.id.name);
emailDisp = getView().findViewById(R.id.email);
addressDisp = getView().findViewById(R.id.address);
nameDisp.setText("Name: "+ nname);
emailDisp.setText("Email: "+ eemail);
addressDisp.setText("Address: "+ aaddress);
final ListView list = v.findViewById(R.id.list);
ArrayList<String> arrayList = new ArrayList<>();
arrayList.add("View sensor 1");
arrayList.add("View sensor 2");
arrayList.add("View login details");
arrayList.add("Logout");
ArrayAdapter<String> arrayAdapter = new ArrayAdapter<String>(v.getContext(), android.R.layout.simple_list_item_1, arrayList);
list.setAdapter(arrayAdapter);
TextView textView = new TextView(v.getContext());
textView.setText("Please select an option:");
list.addHeaderView(textView);
list.setOnItemClickListener(new AdapterView.OnItemClickListener() {
/*private void showFragment() {
Fragment fragment = new Fragment();
FragmentTransaction transaction = getFragmentManager().beginTransaction();
transaction.addToBackStack(null);
// transaction.setCustomAnimations(R.animator.fade_in, R.animator.fade_out);
transaction.replace(R.id.account, fragment, "fragment");
transaction.commit();
}*/
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
String clickedItem = (String) list.getItemAtPosition(position);
Toast.makeText(getView().getContext(), clickedItem, Toast.LENGTH_SHORT).show();
Intent intent = new Intent(getView().getContext(), LoginFragment.class);
intent.putExtra(EXTRA_MESSAGE, clickedItem);
startActivity(intent);
}
});
return v;
}
private void ListViewFragment(Fragment showinfo){
Bundle arguments = getArguments();
String userName = arguments.getString("Name");
String userEmail = arguments.getString("Email");
String userAddress = arguments.getString("Address");
nameDisp =getView().findViewById(R.id.name);
emailDisp = getView().findViewById(R.id.email);
addressDisp = getView().findViewById(R.id.address);
nameDisp.setText("Name: "+ userName);
emailDisp.setText("Email: "+ userEmail);
addressDisp.setText("Address: "+ userAddress);
Fragment fragment = showinfo;
FragmentTransaction transaction = getFragmentManager().beginTransaction();
transaction.setCustomAnimations(R.animator.anim1, R.animator.anim2);
transaction.addToBackStack(null);
transaction.replace(R.id.account, fragment);
transaction.commit();
}
}
mainmenu.xml(片段的xml)
<androidx.constraintlayout.widget.ConstraintLayout
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/container"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="@+id/nameDisp"
android:layout_width="95dp"
android:layout_height="34dp"
android:layout_marginEnd="16dp"
android:layout_marginRight="16dp"
android:layout_weight="1"
android:text="TextView"
app:layout_constraintBottom_toTopOf="@+id/list"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.552" />
<TextView
android:id="@+id/emailDisp"
android:layout_width="90dp"
android:layout_height="38dp"
android:layout_weight="1"
android:text="TextView"
app:layout_constraintBottom_toTopOf="@+id/list"
app:layout_constraintEnd_toStartOf="@+id/nameDisp"
app:layout_constraintHorizontal_bias="0.758"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<TextView
android:id="@+id/addressDisp"
android:layout_width="95dp"
android:layout_height="34dp"
android:layout_marginEnd="4dp"
android:layout_marginRight="4dp"
android:layout_weight="1"
android:text="TextView"
app:layout_constraintBottom_toTopOf="@+id/list"
app:layout_constraintEnd_toStartOf="@+id/emailDisp"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.421" />
<ListView
android:id="@+id/list"
android:layout_width="381dp"
android:layout_height="496dp"
android:layout_marginTop="72dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<Button
android:id="@+id/selectOption"
android:layout_width="189dp"
android:layout_height="98dp"
android:layout_weight="1"
android:hint="@string/testStringForToast"
android:text="Button"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/list" />
</androidx.constraintlayout.widget.ConstraintLayout>
另外,如果我可以问的话,是否可以保留传递到这个片段中的值,在另一个片段中显示这些相同的细节?我想使列表视图选项之一成为查看这些详细信息的选项,并删除listview片段中的textviews。
暂无答案!
目前还没有任何答案,快来回答吧!