Question

所以我制作了一个简单的加热文本控制应用程序，它全部使用权限和所有这些，但它使用2个片段，其中有两个文本框，我希望在电话号码中有相同的文本。我无法通过rel1更改rel2中的edittext。

Rel 1：

package com.danielkern.relswitcher;
import android.content.Context;
import android.content.SharedPreferences;
import android.support.v4.app.Fragment;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
import android.telephony.SmsManager;

import static android.content.SharedPreferences.*;

/**
 * Created by Daniel Kern on 03/01/2018.
 */

public class Rel1 extends Fragment{
    Button BtnHOFF, BtnHON, BtnHST, saveB;
    EditText txtPhoneNo;

    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.rel1, container, false);
        final View view2 = inflater.inflate(R.layout.rel2, container, false);
        final SharedPreferences sharedPref = this.getActivity().getSharedPreferences("settings", Context.MODE_PRIVATE);
        String savedNo = sharedPref.getString("phoneNo", "07599070551");
        BtnHOFF = (Button) view.findViewById(R.id.Hoff);
        BtnHON = (Button) view.findViewById(R.id.Hon);
        BtnHST = (Button) view.findViewById(R.id.Hstatus);
        txtPhoneNo = (EditText) view.findViewById(R.id.editText);
        saveB = (Button) view.findViewById(R.id.saveB);
        ((EditText) view.findViewById(R.id.editText)).setText(savedNo);
        Toast.makeText(getActivity().getApplicationContext(), savedNo, Toast.LENGTH_LONG).show();
        BtnHOFF.setOnClickListener(new View.OnClickListener() {
            public void onClick(View view) {
                sendMsg("#REL1=ON", txtPhoneNo.getText().toString());
            }
        });
        BtnHON.setOnClickListener(new View.OnClickListener() {
            public void onClick(View view) {
                sendMsg("#REL1=OFF", txtPhoneNo.getText().toString());
                Log.i(getActivity().toString(), "Done!");
            }
        });
        BtnHST.setOnClickListener(new View.OnClickListener() {
            public void onClick(View view) {
                sendMsg("#STATUS", txtPhoneNo.getText().toString());
            }
        });
        saveB.setOnClickListener(new View.OnClickListener() {
            public void onClick(View view) {
                sharedPref.edit().putString("phoneNo", txtPhoneNo.getText().toString());
                Log.i("me", "Saved!");
                Toast.makeText(getActivity().getApplicationContext(),
                        "Saved!",
                        Toast.LENGTH_LONG).show();
                ((EditText) view2.findViewById(R.id.editText)).setText(txtPhoneNo.getText().toString());
            }
        });
        return view;
    }
    public void sendMsg(String msg, String num){
        try {
            SmsManager smsManager = SmsManager.getDefault();
            smsManager.sendTextMessage(num, null, msg, null, null);
            Toast.makeText(getActivity().getApplicationContext(), "SMS Sent!",
                    Toast.LENGTH_LONG).show();
            } catch (Exception e) {
            Toast.makeText(getActivity().getApplicationContext(),
                    "SMS failed, contact administrator!",
                    Toast.LENGTH_LONG).show();
            e.printStackTrace();
        }
    }

    @Override
    public void onPause() {
        super.onPause();
    }

}

Rel 2：

package com.danielkern.relswitcher;

import android.content.Context;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.telephony.SmsManager;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

/**
 * Created by Daniel Kern on 03/01/2018.
 */

public class Rel2 extends Fragment {
    Button BtnWOFF, BtnWON, BtnWST, saveB;
    EditText txtPhoneNo;
    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.rel2, container, false);
        final View view1 = inflater.inflate(R.layout.rel1, container, false);
        final SharedPreferences sharedPref = this.getActivity().getSharedPreferences("settings", Context.MODE_PRIVATE);
        String savedNo = sharedPref.getString("phoneNo", "07599070551");
        BtnWOFF = (Button) view.findViewById(R.id.Woff);
        BtnWON = (Button) view.findViewById(R.id.Won);
        BtnWST = (Button) view.findViewById(R.id.Wstatus);
        saveB = (Button) view.findViewById(R.id.saveB);
        txtPhoneNo = (EditText) view.findViewById(R.id.editText);
        ((EditText) view.findViewById(R.id.editText)).setText(savedNo);
        Toast.makeText(getActivity().getApplicationContext(), savedNo, Toast.LENGTH_LONG).show();
        BtnWOFF.setOnClickListener(new View.OnClickListener() {
            public void onClick(View view) {
                sendMsg("#REL2=ON", txtPhoneNo.getText().toString());
            }
        });
        BtnWON.setOnClickListener(new View.OnClickListener() {
            public void onClick(View view) {
                sendMsg("#REL2=OFF", txtPhoneNo.getText().toString());
            }
        });
        BtnWST.setOnClickListener(new View.OnClickListener() {
            public void onClick(View view) {
                sendMsg("#STATUS", txtPhoneNo.getText().toString());
            }
        });
        saveB.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                sharedPref.edit().putString("phoneNo", txtPhoneNo.getText().toString());
                ((EditText) view1.findViewById(R.id.editText)).setText(txtPhoneNo.getText().toString());
                Log.d("me", "Saved!");
            }
        });
        return view;
    }
    public void sendMsg(String msg, String num){
        try {
            SmsManager smsManager = SmsManager.getDefault();
            smsManager.sendTextMessage(num, null, msg, null, null);
            Toast.makeText(getActivity().getApplicationContext(), "SMS Sent!",
                    Toast.LENGTH_LONG).show();
            } catch (Exception e) {
            Toast.makeText(getActivity().getApplicationContext(),
                    "SMS failed, contact administrator!",
                    Toast.LENGTH_LONG).show();
            e.printStackTrace();
        }
    }

    @Override
    public void onPause() {
        super.onPause();
    }
}

Rel 1 xml：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent" android:layout_height="match_parent">

    <Button
        android:id="@+id/Hon"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentStart="true"
        android:layout_alignParentTop="true"
        android:layout_marginTop="44dp"
        android:text="Heating ON (REL1 OFF)"
        android:textSize="18sp"
        android:textStyle="bold" />

    <Button
        android:id="@+id/Hoff"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentStart="true"
        android:layout_below="@+id/Hon"
        android:layout_marginTop="13dp"
        android:text="Heating OFF (REL1 ON)"
        android:textSize="18sp"
        android:textStyle="bold" />

    <Button
        android:id="@+id/Hstatus"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentStart="true"
        android:layout_below="@+id/Hoff"
        android:layout_marginTop="15dp"
        android:text="STATUS"
        android:textSize="18sp"
        android:textStyle="bold" />

    <TextView
        android:id="@+id/texts"
        android:layout_width="match_parent"
        android:layout_height="200dp"
        android:layout_alignParentBottom="true"
        android:layout_centerHorizontal="true"
        android:layout_marginBottom="46dp"
        android:text="Coming Soon!"
        android:textSize="24sp" />

    <EditText
        android:id="@+id/editText"
        android:text="07599070551"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:ems="10"
        android:inputType="phone" />

    <Button
        android:id="@+id/saveB"
        android:layout_width="wrap_content"
        android:layout_height="40dp"
        android:layout_alignBaseline="@+id/editText"
        android:layout_alignBottom="@+id/editText"
        android:layout_alignParentEnd="true"
        android:text="Save" />

</RelativeLayout>

Rel 2 XML：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent" android:layout_height="match_parent">

    <Button
        android:id="@+id/Won"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentStart="true"
        android:layout_alignParentTop="true"
        android:layout_marginTop="44dp"
        android:text="Water ON (REL2 OFF)"
        android:textSize="18sp"
        android:textStyle="bold" />

    <Button
        android:id="@+id/Woff"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentStart="true"
        android:layout_below="@+id/Won"
        android:layout_marginTop="13dp"
        android:text="Water OFF (Rel2 On)"
        android:textSize="18sp"
        android:textStyle="bold" />

    <Button
        android:id="@+id/Wstatus"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentStart="true"
        android:layout_below="@+id/Woff"
        android:layout_marginTop="15dp"
        android:text="STATUS"
        android:textSize="18sp"
        android:textStyle="bold" />

    <TextView
        android:id="@+id/texts"
        android:layout_width="match_parent"
        android:layout_height="200dp"
        android:layout_alignParentBottom="true"
        android:layout_centerHorizontal="true"
        android:layout_marginBottom="46dp"
        android:text="Coming Soon!"
        android:textSize="24sp" />

    <EditText
        android:id="@+id/editText"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:ems="10"
        android:inputType="phone" />

    <Button
        android:id="@+id/saveB"
        android:layout_width="wrap_content"
        android:layout_height="40dp"
        android:layout_alignBaseline="@+id/editText"
        android:layout_alignBottom="@+id/editText"
        android:layout_alignParentEnd="true"
        android:text="Save" />

</RelativeLayout>

编辑：当我在rel1中按save时，我希望Rel2中的编辑文本更改，因此电话号码框将始终相同。 rel1

编辑2：我已修复了共享首选项问题，但我仍然想知道是否有人可以使文本框与文本更新或按下保存按钮时相同。

Answer 1

有两种方法可以做到这一点。

使用界面

使用类似TextChangeListener的方法创建一个接口，并声明方法onTextChange(String text)。

interface TextChangeListener{
    void onTextChange(String number);
}

在HostActivity

class HostActivity extends Activity implements TextChangeListener{
   ...
   void onTextChange(String number){
       secondFragment.updateNumber(number)
   }
   ...
}

在FirstFragment中使用afterTextChanged() TextWatcher监听器中的隐含接口调用活动

class FirstFragment extends Fragment{
    private TextChangeListener activity;

    @Override
    public onAttach(Context context){
         if(context instanceof TextChangeListener){
              activity = (TextChangeListener) context;
         }
    }

    phNumEditText.addTextChangedListener(new TextWatcher() {

        @Override           
        public void afterTextChanged(Editable s) {
            activity.onTextChange(s.toString);
        }
        ...
    );

...
}

在接收来自活动的电话的SecondFragment中，使用新数据更新EditText。

class SecondFragment extends Fragment{
    ...
    public void updateNumber(String number){
        editText.setText(number);
    }
}

使用EventBus

使用EventBus发布FirstFragment的活动。该事件将包含要在SecondFragment中填充的数据。 SecondFragment将订阅该活动，并在收到活动后，数据将填充到EditText。

Android片段 - 编辑另一个片段的文本

1 个答案: