我用一些按钮创建了一个片段，我试图通过点击按钮调用其他片段，但没有任何反应，没有错误，没有操作。
这是我的实施：
main_activit.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"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:background="@color/grey"
tools:context=".MainActivity"
android:weightSum="1"
android:orientation="vertical"
>
<android.support.v7.widget.Toolbar
android:id="@+id/mainToobar"
android:layout_height="?attr/actionBarSize"
android:layout_width="match_parent"
android:elevation="4dp"
android:minHeight="?attr/actionBarSize"
android:background="?attr/colorPrimary"
android:title="@string/mainToobarTitle"
app:popupTheme="@style/ThemeOverlay.AppCompat.Light"
/>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/homebuttons_fragment_container"
android:layout_width="match_parent"
android:layout_height="200dp" />
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/main_fragment_container"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</LinearLayout>
HomeButtonsFragment.java
public class HomeButtonsFragment extends Fragment implements View.OnClickListener {
@Override
public View onCreateView(
LayoutInflater inflater,
ViewGroup container,
Bundle savedInstanceState
) {
View view = inflater.inflate(R.layout.fragment_home_buttons, container, false);
Button button = (Button) view.findViewById(R.id.schedule_home_button);
button.setOnClickListener(this);
return view;
}
@Override
public void onClick(View v) {
FragmentManager fragmentManager = getFragmentManager();
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
ScheduleFragment scheduleFragment = new ScheduleFragment();
fragmentTransaction.add(R.id.main_fragment_container, scheduleFragment);
}
}
fragment_home_button.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
>
<Button
android:id="@+id/schedule_home_button"
android:layout_width="100dp"
android:layout_height="fill_parent"
android:layout_alignParentEnd="true"
android:text="@string/label.home.button.schedule"
android:tag="home_button"
android:stateListAnimator="@null"
style="@style/ScheduleButton"
/>
</RelativeLayout>
答案 0 :(得分：0)
您在.commit()声明中遗漏了fragmentTransaction。
fragmentTransaction.add(R.id.main_fragment_container, scheduleFragment).commit();
答案 1 :(得分：0)
你错过了 commit（）; ，我确信有时会遗漏一些小事，只需添加 commit（）; ，它就能正常工作 用这个 FragmentManager fragmentManager = getFragmentManager（）; FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction（）;
import java.text.NumberFormat;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Scanner;
public class TestShop {
public static final String MALBORO_LIGHTS = "Malboro Lights";
public static final String MALBORO_LIGHTS_SOFT = "Marlboro Lights, Soft Pack";
public static final String MALBORO_LIGHTS_FLIP = "Marlboro Lights, Flip Pack";
public static final String MALBORO_RED = "Malboro Reds";
public static final String MALBORO_RED_SOFT = "Marlboro Reds, Soft Pack";
public static final String MALBORO_RED_FLIP = "Marlboro Reds, Flip Pack";
public static final String DUNHILL = "Dunhill";
public static final String DUNHILL_SOFT = "Dunhill, Soft Pack";
public static final String DUNHILL_FLIP = "Dunhill, Flip Pack";
public static final String PHILLIP = "Phillip";
public static final String PHILLIP_SOFT = "Phillip, Soft Pack";
public static final String PHILLIP_FLIP = "Phillip, Flip Pack";
public static void main(String[] args) {
new TestShop();
}
public TestShop() {
Scanner keyboard = new Scanner(System.in);
/**************************************************************************/
/* This part is dynamic, change this when you want new items, prices or */
/* groups */
/**************************************************************************/
// A list of items that have been ordered
Map<String, Integer> orders = new HashMap<>(25);
// A list of items keyed to prices
Map<String, Double> prices = new HashMap<>(25);
prices.put(MALBORO_LIGHTS_SOFT, 70d);
prices.put(MALBORO_LIGHTS_FLIP, 80d);
prices.put(MALBORO_RED_SOFT, 70d);
prices.put(MALBORO_RED_FLIP, 80d);
prices.put(DUNHILL_SOFT, 60d);
prices.put(DUNHILL_FLIP, 70d);
prices.put(PHILLIP_SOFT, 70d);
prices.put(PHILLIP_FLIP, 80d);
// Mapping items to groups...
Map<String, List<String>> groups = new HashMap<>(25);
groups.put(MALBORO_LIGHTS, new ArrayList<>(Arrays.asList(new String[]{MALBORO_LIGHTS_SOFT, MALBORO_LIGHTS_FLIP})));
groups.put(MALBORO_RED, new ArrayList<>(Arrays.asList(new String[]{MALBORO_RED_SOFT, MALBORO_RED_FLIP})));
groups.put(DUNHILL, new ArrayList<>(Arrays.asList(new String[]{DUNHILL_SOFT, DUNHILL_FLIP})));
groups.put(PHILLIP, new ArrayList<>(Arrays.asList(new String[]{PHILLIP_SOFT, PHILLIP_FLIP})));
/**************************************************************************/
/**************************************************************************/
/* The rest of this is pretty static and is driven by the data from above */
/* This means, you don't need change anything below here, when the stuff */
/* changes */
/**************************************************************************/
boolean done = false;
do {
System.out.println("Welcome to my shop");
List<String> keys = new ArrayList<>(groups.keySet());
for (int index = 0; index < keys.size(); index++) {
System.out.println("[" + (index + 1) + "] " + keys.get(index));
}
System.out.println("[0] Exit");
String input = keyboard.nextLine();
try {
int selectedIndex = Integer.parseInt(input);
if (selectedIndex == 0) {
done = true;
} else if (selectedIndex > 0 && selectedIndex <= keys.size()) {
String key = keys.get(selectedIndex - 1);
List<String> items = groups.get(key);
boolean subDone = false;
do {
System.out.println("Items for " + key + "....");
for (int index = 0; index < items.size(); index++) {
System.out.println(" [" + (index + 1) + "] " + items.get(index));
}
System.out.println(" [0] Return");
input = keyboard.nextLine();
try {
int index = Integer.parseInt(input);
if (index > 0 && index <= items.size()) {
index--; // The items in the list are 0 indexed
String item = items.get(index);
Integer quanity = orders.get(item);
if (quanity == null) {
quanity = 1;
} else {
quanity++;
}
orders.put(item, quanity);
} else if (index == 0) {
subDone = true;
} else {
System.out.println("Invalid selection, please try again");
}
} catch (NumberFormatException exp) {
System.out.println("!! " + input + " is not a valid selection");
}
} while (!subDone);
} else {
System.out.println("Invalid selection, please try again");
}
} catch (NumberFormatException exp) {
System.out.println("!! " + input + " is not a valid selection");
}
} while (!done);
double total = 0;
for (Map.Entry<String, Integer> entry : orders.entrySet()) {
int quanity = entry.getValue();
double price = prices.get(entry.getKey());
total += quanity * price;
System.out.println(String.format(
"%-20s x %4d @ %7s = %10s",
entry.getKey(),
quanity,
NumberFormat.getCurrencyInstance().format(price),
NumberFormat.getCurrencyInstance().format(quanity * price)));
}
System.out.printf("%-20s %4s %7s ==========%n", "", "", "");
System.out.printf("%-20s %4s %7s %10s%n", "", "", "", NumberFormat.getCurrencyInstance().format(total));
}
}
答案 2 :(得分：0)
@覆盖 public void onClick（查看v）{ FragmentManager fragmentManager = getFragmentManager（）; FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction（）;
ScheduleFragment scheduleFragment = new ScheduleFragment();
fragmentTransaction.add(R.id.main_fragment_container, scheduleFragment).commit();
或 fragmentTransaction.commit（）; }
答案 3 :(得分：-1)
你的onClick方法应该是，
@Override
public void onClick(View v) {
if(v.getId()==R.id.schedule_home_button){
FragmentManager fragmentManager = getFragmentManager();
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
ScheduleFragment scheduleFragment = new ScheduleFragment();
fragmentTransaction.add(R.id.main_fragment_container, scheduleFragment).commit();
}
}