Fragment Intermediate(III):创建一个活动，在点击相应按钮时在片段之间交替 [英] Fragment Intermediate(III): Creating a activity that alternate between fragments onclick of respective button
本文介绍了Fragment Intermediate(III):创建一个活动，在点击相应按钮时在片段之间交替的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
目标:
创建一个具有两个按钮的活动，按钮 1 和按钮 2.单击时，片段将在两个片段之间交替.
Create a activity that have two buttons, button 1 and button 2. When click, the fragment will alternate between the two fragments.
背景:
Fragmentone 将从主要活动中获取edittext 并在片段的textview 上获取settext.Fragmenttwo 将显示文本带到表格布局.(我的最终目标是使用来自主要活动的输入并将其显示到表格的文本视图之一，但它不起作用，请就此提出建议)##issue 1
Fragmentone will take the edittext from the main activity and settext on the textview on the fragment. Fragmenttwo will take display text to the tablelayout. (My ultimate goal is to use the input from the main activty and display it to one of the textview of the table, but it is not working, kindly advise on that)##issue 1
问题:
应该显示 fragmentone 的 button1 不起作用.在主要活动的编辑文本中键入输入后，当我单击按钮时，片段仍然存在.FragmentOne 没有出来.在 fragmentone 中放置一个 toast，toast 会显示我的输入.
The button1 that is supposed to display fragmentone is not working. After keying in the input into the edittext on the mainactivity, when i click the button, the fragmenttwo persist. FragmentOne did not come out. Place an toast in fragmentone and the toast display my input.
特别感谢:想特别感谢这个社区中帮助我走到这一步的人.并且要感谢 Raghunandan，他指导我完成了片段推进 I、II.非常感谢您在我的学习之旅中帮助我.希望我的问题和 raghunandan 建议能够帮助那些踏上这段旅程的人减少学习曲线.
Special Thanks to: Would like to extend a special thanks to helpful people in this community for guiding me this far. And will like to extend my thanks to Raghunandan who guide me through fragment advance I, II. Thanks you very much for assisting me through my learning journey. Hope my questions and raghunandan advice would help reduce the learning curve for those embraking on this journey.
片段中间体 (I)
Fragment Intermediate(I):Getting从edittext输入，在片段的textview中设置文本
片段中间体(II)
Fragment Intermediate (II):动态添加行片段，安卓
MainActivity.java
MainActivity.java
import android.os.Bundle;
import android.app.Activity;
import android.app.Fragment;
import android.app.FragmentManager;
import android.app.FragmentTransaction;
import android.view.Menu;
import android.view.View;
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
public void selectFrag(View view) {
Fragment fr;
if(view == findViewById(R.id.button2)) {
fr = new FragmentTwo();
}
else {
fr = new FragmentOne();
}
FragmentManager fm = getFragmentManager();
FragmentTransaction fragmentTransaction = fm.beginTransaction();
fragmentTransaction.replace(R.id.fragment_place, fr);
fragmentTransaction.commit();
}
}
activity_main.xml
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<FrameLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
<TableLayout
android:id="@+id/TableLayout01"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:stretchColumns="1" >
<TableRow
android:id="@+id/tableRow1"
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
<TextView
android:id="@+id/dis_input"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Input" />
<EditText
android:id="@+id/input"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:ems="10" />
</TableRow>
<TableRow
android:id="@+id/tableRow9"
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
<Button
android:id="@+id/button2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:onClick="selectFrag"
android:text="Button2" />
<Button
android:id="@+id/button1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:onClick="selectFrag"
android:text="Calculate" />
</TableRow>
</TableLayout>
</FrameLayout>
<fragment
android:name="com.example.sample.FragmentTwo"
android:id="@+id/fragment_place"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</LinearLayout>
FragmentOne.java
FragmentOne.java
public class FragmentOne extends Fragment {
@Override
public View onCreateView(LayoutInflater inflater,ViewGroup container, Bundle savedInstanceState)
{
View view = inflater.inflate(R.layout.fragment_one, container, false);
TextView warcraft= (TextView) view.findViewById(R.id.moargold);
EditText moargold = (EditText) getActivity().findViewById(R.id.input);
Double vespenegas = Double.parseDouble(moargold.getText().toString());
warcraft.setText(new Double(vespenegas).toString());
Toast toast = Toast.makeText(getActivity(),new Double(vespenegas).toString() , Toast.LENGTH_SHORT);
toast.show();
return view;
}
}
fragment_one.xml
fragment_one.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<TableLayout
android:id="@+id/TableLayout01"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:stretchColumns="1" >
<TableRow
android:id="@+id/tableRow4"
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
<TextView
android:id="@+id/dis_moargold"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Gold Count:" />
<TextView
android:id="@+id/moargold"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="TextView" />
</TableRow>
</TableLayout>
</LinearLayout>
FragmentTwo.java
FragmentTwo.java
public class FragmentTwo extends Fragment {
@Override
public View onCreateView(LayoutInflater inflater,ViewGroup container, Bundle savedInstanceState)
{
View view = inflater.inflate(R.layout.fragment_two, container, false);
EditText input = (EditText) getActivity().findViewById(R.id.input);
TableLayout tl=(TableLayout) view.findViewById(R.id.mainLayout);
TableRow tr = new TableRow(getActivity());
tr.setLayoutParams(new LayoutParams( LayoutParams.FILL_PARENT,LayoutParams.WRAP_CONTENT));
TextView textview1 = new TextView(getActivity());
textview1.setText("happy");
tr.addView(textview1);
TextView textview2 = new TextView(getActivity());
textview2.setText("unhappy");
//###############To insert text from editview to table
// Double buygas = Double.parseDouble(input.getText().toString());
// textview2.setText(new Double(buygas).toString());
tr.addView(textview2);
tl.addView(tr, new TableLayout.LayoutParams(LayoutParams.FILL_PARENT,LayoutParams.WRAP_CONTENT));
return view;
}
}
fragment_two.xml
fragment_two.xml
<?xml version="1.0" encoding="UTF-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:background="#ffff00">
<TableLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:id="@+id/mainLayout">
<TableRow
android:id="@+id/infoRow"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<TextView
android:text="First"
android:id="@+id/column1"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
</TextView>
<TextView
android:text="Second"
android:id="@+id/column2"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
</TextView>
</TableRow>
</TableLayout>
</LinearLayout>
推荐答案
只需要 activity_main.xml 中的 FrameLayout 和 EditText.FrameLayout 是一个容器 (ViewGroup)，您可以向其中添加或替换片段.您的 TableLayout 可以在片段布局中.
Just have the FrameLayout and EditText in activity_main.xml. FrameLayout is a container (ViewGroup) to which you add or replace fragments. Your TableLayout can be in fragment layout.
您正在以编程方式添加/替换片段，所以需要在 xml 中具有相同的内容.
You are adding/replacing fragment programatically so what is the need to have the same in xml.
在activity_main.xml中有这个
Have this in activity_main.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<EditText
android:id="@+id/input"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:ems="10" >
<requestFocus />
</EditText>
<FrameLayout
android:id="@+id/container" // id is container
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_above="@+id/button1"
android:layout_below="@+id/input"
>
</FrameLayout>
<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignRight="@+id/input"
android:onClick="selectFrag"
android:text="Button1" />
<Button
android:id="@+id/button2"
android:onClick="selectFrag"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/input"
android:layout_alignParentBottom="true"
android:text="Button2" />
</RelativeLayout>
然后在 MainActivity
Then in MainActivity
public class MainActivity extends Activity {
Fragment fr;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
public void selectFrag(View view) {
if(view == findViewById(R.id.button2)) {
fr = new FragmentTwo();
}
else {
fr = new FragmentOne();
}
FragmentManager fm = getFragmentManager();
FragmentTransaction fragmentTransaction = fm.beginTransaction();
fragmentTransaction.replace(R.id.container, fr);
fragmentTransaction.commit();
}
}
片段一
public class FragmentOne extends Fragment {
@Override
public View onCreateView(LayoutInflater inflater,ViewGroup container, Bundle savedInstanceState)
{
View view = inflater.inflate(R.layout.frag1, container, false);
TextView warcraft= (TextView) view.findViewById(R.id.moargold);
EditText moargold = (EditText) getActivity().findViewById(R.id.input);
Double vespenegas = Double.parseDouble(moargold.getText().toString());
warcraft.setText(String.valueOf(vespenegas));
Toast toast = Toast.makeText(getActivity(),String.valueOf(vespenegas) , Toast.LENGTH_SHORT);
toast.show();
return view;
}
}
frag1.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<TableLayout
android:id="@+id/TableLayout01"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:stretchColumns="1" >
<TableRow
android:id="@+id/tableRow4"
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
<TextView
android:id="@+id/dis_moargold"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Gold Count:" />
<TextView
android:id="@+id/moargold"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="TextView" />
</TableRow>
</TableLayout>
</LinearLayout>
片段二
public class FragmentTwo extends Fragment {
@Override
public View onCreateView(LayoutInflater inflater,ViewGroup container, Bundle savedInstanceState)
{
View view = inflater.inflate(R.layout.frag2, container, false);
EditText input = (EditText) getActivity().findViewById(R.id.input);
TableLayout tl=(TableLayout) view.findViewById(R.id.TableLayout01);
TableRow tr = new TableRow(getActivity());
tr.setLayoutParams(new LayoutParams( LayoutParams.FILL_PARENT,LayoutParams.WRAP_CONTENT));
TextView textview1 = new TextView(getActivity());
textview1.setText("happy");
tr.addView(textview1);
TextView textview2 = new TextView(getActivity());
textview2.setText("unhappy");
//###############To insert text from editview to table
// Double buygas = Double.parseDouble(input.getText().toString());
// textview2.setText(new Double(buygas).toString());
tr.addView(textview2);
tl.addView(tr, new TableLayout.LayoutParams(LayoutParams.FILL_PARENT,LayoutParams.WRAP_CONTENT));
return view;
}
}
frag2.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<TableLayout
android:id="@+id/TableLayout01"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:stretchColumns="1" >
<TableRow
android:id="@+id/tableRow4"
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
<TextView
android:id="@+id/dis_moargold"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Gold Count:" />
<TextView
android:id="@+id/moargold"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="TextView" />
</TableRow>
</TableLayout>
</LinearLayout>
捕捉
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