将数据从一个片段传递到另一个 [英] Passing data from a Fragment to another one
问题描述
我知道,此问题已在此站点和其他站点中存在,但我仍然尝试查找解决方案,因为到目前为止,每个解决方案都失败了.
I known, that this question is already exist in this site and others, but I still try find a solution, because so far every solution is failed.
我有一个活动,其中包含2个片段.在第一个Fragment中,我有5个EditText,此输入我需要传递到第二个Fragment,但是...我在此Package中也有一个Java类,它必须使用此输入的值,结果我必须显示在第二个片段中. 这是一个普通的计算器.
I have an Activity, which has 2 Fragments. In the first Fragment I have 5 EditText, and this inputs I need to pass to the second Fragment, but... I also have a Java Class in this Package, which has to work with this inputs's value, and that result I have to display in the second Fragment. This is a average calculator.
这是我的第一个片段:
package com.example.afotel;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentTransaction;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
public class gyorsSzam extends Fragment {
EditText gradeFive, gradeFour, gradeThree, gradeTwo, gradeOne;
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container,
@Nullable Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_gyors_szam, container, false);
Button calculate = (Button) view.findViewById(R.id.gGyors);
gradeFive = (EditText) view.findViewById(R.id.numberOfGardeFive);
gradeFour = (EditText) view.findViewById(R.id.numberOfGardeFour);
gradeThree = (EditText) view.findViewById(R.id.numberOfGardeThree);
gradeTwo = (EditText) view.findViewById(R.id.numberOfGardeTwo);
gradeOne = (EditText) view.findViewById(R.id.numberOfGardeOne);
calculate.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
FragmentTransaction fr = getFragmentManager().beginTransaction();
fr.replace(R.id.gyorsSzamlalas, new jegyekFelLe());
fr.commit();
String gradeFiveSt = gradeFive.getText().toString();
String gradeFourSt = gradeFour.getText().toString();
String gradeThreeSt = gradeThree.getText().toString();
String gradeTwoSt = gradeTwo.getText().toString();
String gradeOneeSt = gradeOne.getText().toString();
Bundle bundle = new Bundle();
bundle.putString("Five", gradeFiveSt );
bundle.putString("Four", gradeFourSt );
bundle.putString("Three", gradeThreeSt );
bundle.putString("Two", gradeTwoSt );
bundle.putString("Ones", gradeOneeSt );
}
});
return view;
}
}
这是我的第二个片段:
package com.example.afotel;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.EditText;
import android.widget.TextView;
public class jegyekFelLe extends Fragment {
public jegyekFelLe() {
}
@Nullable
@Override
public View onCreateView(LayoutInflater inflater,@Nullable ViewGroup container,
@Nullable Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_jegyek_fel_le, container, false);
Bundle bundle = getArguments();
String gradeFive = bundle.getString("Five");
String gradeFour = bundle.getString("Four");
String gradeThree = bundle.getString("Three");
String gradeTwo = bundle.getString("Two");
String gradeOne = bundle.getString("One");
TextView upFive = (TextView) rootView.findViewById(R.id.upFive);
upFive.setText(gradeFive);
TextView felNegyes = (TextView) rootView.findViewById(R.id.);
upFour.setText(gradeFour);
TextView upThree= (TextView) rootView.findViewById(R.id.upThree);
upThree.setText(gradeThree);
TextView upTwo = (TextView) rootView.findViewById(R.id.upTwo);
upTwo.setText(gradeTwo);
TextView downOne = (TextView) rootView.findViewById(R.id.dowbOne);
leEgyes.setText(gradeOne);
return rootView;
}
}
如果代码包含TextView upFive ...(等)部分,则当我单击计算"按钮时,程序将崩溃.我不知道这是什么问题,因为我做了这部影片所说的一切: https://www.youtube.com/watch?v=_4i5Jk5RnFA
If the code contains the TextView upFive...(etc.) part, the program is crash if i click the calculate button. I don't know what is the problem, because i do everything that this video is say: https://www.youtube.com/watch?v=_4i5Jk5RnFA
我知道,此示例中未使用Java类,这是因为我的代码存在此问题.首先,我想知道如何在两个Fragment之间传递数据,然后编写以计算这5个EditText所需的结果. 我是Android Studio的入门者,因此我需要简单,难以理解的解决方案.
I know, that the Java Class in this example is not used, that's because I have this problem with the code. First I want to know how to pass data between two Fragments, and after I write to calculate the result that I need from this 5 EditText. Im a starter in Android Studio, so i need easy, undarstandable solution.
希望您能理解我的问题,对不起我的英语.
I hope You can understand my problem, sorry for my english.
推荐答案
设置包并在提交事务之前将参数添加到片段.您可能需要将代码更改为以下结构:
Set the bundle and add arguments to the fragment before committing transaction. You may have to change your code to this structure:
Bundle bundle= new Bundle();
//add items to the bundle then begin transacting
Fragment jegyekFelLe= new jegyekFelLe();
jegyekFelLe.setArguments(bundle);
FragmentTransaction fr = getFragmentManager().beginTransaction();
fr.replace(R.id.gyorsSzamlalas,jegyekFelLe );
fr.commit();
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