Android 从片段到活动的意图
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Intent from Fragment to Activity
提问by AndroidNewbie
I was trying to go to another page using button, but it always fail.
我试图使用 转到另一个页面button，但它总是失败。
Here is my First Class with its XML:
这是我的头等舱及其 XML：
public class FindPeopleFragment extends Fragment {
public FindPeopleFragment(){}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_home, container, false);
return rootView;
}
public void goToAttract(View v)
{
Intent intent = new Intent(getActivity().getApplication(), MainActivityList.class);
startActivity(intent);
}
}
Here is my XML:
这是我的 XML：
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerInParent="true"
android:layout_marginBottom="48dp"
android:onClick="goToAttract"
android:text="Button" /></RelativeLayout>
Here is my stacktrace..this is the result when i used onclicklistener
这是我的堆栈跟踪..这是我使用 onclicklistener 时的结果
12-30 16:54:28.006: E/AndroidRuntime(992): FATAL EXCEPTION: main
12-30 16:54:28.006: E/AndroidRuntime(992): java.lang.RuntimeException: Unable to start activity ComponentInfo{info.androidhive.slidingmenu/info.androidhive.slidingmenu.MainActivityList}: android.view.InflateException: Binary XML file line #7: Error inflating class <unknown>
12-30 16:54:28.006: E/AndroidRuntime(992): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1955)
12-30 16:54:28.006: E/AndroidRuntime(992): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1980)
12-30 16:54:28.006: E/AndroidRuntime(992): at android.app.ActivityThread.access0(ActivityThread.java:122)
12-30 16:54:28.006: E/AndroidRuntime(992): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1146)
12-30 16:54:28.006: E/AndroidRuntime(992): at android.os.Handler.dispatchMessage(Handler.java:99)
12-30 16:54:28.006: E/AndroidRuntime(992): at android.os.Looper.loop(Looper.java:137)
12-30 16:54:28.006: E/AndroidRuntime(992): at android.app.ActivityThread.main(ActivityThread.java:4340)
12-30 16:54:28.006: E/AndroidRuntime(992): at java.lang.reflect.Method.invokeNative(Native Method)
12-30 16:54:28.006: E/AndroidRuntime(992): at java.lang.reflect.Method.invoke(Method.java:511)
12-30 16:54:28.006: E/AndroidRuntime(992): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
12-30 16:54:28.006: E/AndroidRuntime(992): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
12-30 16:54:28.006: E/AndroidRuntime(992): at dalvik.system.NativeStart.main(Native Method)
12-30 16:54:28.006: E/AndroidRuntime(992): Caused by: android.view.InflateException: Binary XML file line #7: Error inflating class <unknown>
12-30 16:54:28.006: E/AndroidRuntime(992): at android.view.LayoutInflater.createView(LayoutInflater.java:606)
12-30 16:54:28.006: E/AndroidRuntime(992): at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:56)
12-30 16:54:28.006: E/AndroidRuntime(992): at android.view.LayoutInflater.onCreateView(LayoutInflater.java:653)
12-30 16:54:28.006: E/AndroidRuntime(992): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:678)
12-30 16:54:28.006: E/AndroidRuntime(992): at android.view.LayoutInflater.rInflate(LayoutInflater.java:
回答by Nitin Misra
use this
用这个
public void goToAttract(View v)
{
Intent intent = new Intent(getActivity(), MainActivityList.class);
startActivity(intent);
}
be sure you've registered MainActivityListin you Manifest
确保您已MainActivityList在 Manifest 中注册
回答by Kanwaljit Singh
Try this code once-
试试这个代码一次 -
public class FindPeopleFragment extends Fragment {
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_home,
container, false);
Button button = (Button) rootView.findViewById(R.id.button1);
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
updateDetail();
}
});
return rootView;
}
public void updateDetail() {
Intent intent = new Intent(getActivity(), MainActivityList.class);
startActivity(intent);
}
}
And as suggested by Raghunandan remove below code from your fragment_home.xml-
根据 Raghunandan 的建议，从您的fragment_home.xml- 中删除以下代码
android:onClick="goToAttract"
回答by Raghunandan
Remove this
删除这个
android:onClick="goToAttract"
Then
然后
View rootView = inflater.inflate(R.layout.fragment_home, container, false);
Button b = (Button)rootView.findViewById(R.id.button1);
b.setOnClickListener(new OnClickListener()
{
public void onClick(View v)
{
Intent intent = new Intent(getActivity(), MainActivityList.class);
startActivity(intent);
}
});
return rootView;
The error says you need to public void goToAttract(View v)in Activity class
错误说你需要public void goToAttract(View v)在 Activity 类中
Could not find method goToAttract(View) in the activity class
Reason pls check the answer by PareshMayani @
原因请检查 PareshMayani @ 的答案
Android app crashing (fragment and xml onclick)
Android 应用程序崩溃（片段和 xml onclick）
Edit:
编辑：
Caused by: java.lang.OutOfMemoryError
I guess you have a image that is too big to fit in and it needs to be scaled down. Hence the OutOfMemoryError.
我猜您的图像太大而无法放入，需要按比例缩小。因此OutOfMemoryError。
回答by Nisar Ahmad
in your receiving intent use as
在您的接收意图中用作
Intent intent = getActivity().getIntent();
((TextView)view.findViewById(R.id.hello)).setText(intent.getStringExtra("Hello"));
and in your send intent
并在您的发送意图中
Intent intent = new Intent(getActivity(),Main2Activity.class);
intent.putExtra("Hello","Nisar");
getActivity().startActivity(intent);
remember both are in fragments
记住两者都是碎片
回答by Bikeboy
For Kotlin you can use...
对于 Kotlin，您可以使用...
val myIntent = Intent(activity, your_destination_activity::class.java)
startActivity(myIntent)
回答by IMNK
Hope this code will help
希望此代码会有所帮助
public class ThisFragment extends Fragment {
public Button button = null;
Intent intent;
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.yourlayout, container, false);
intent = new Intent(getActivity(), GoToThisActivity.class);
button = (Button) rootView.findViewById(R.id.theButtonid);
button.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
startActivity(intent);
}
});
return rootView;
}
You can use this code, make sure you change "ThisFragment" as your fragment name, "yourlayout" as the layout name, "GoToThisActivity" change it to which activity do you want and then "theButtonid" change it with your button id you used.
您可以使用此代码，确保将“ ThisFragment”更改为您的片段名称，“ yourlayout”作为布局名称，“ GoToThisActivity”将其更改为您想要的活动，然后“ theButtonid”将其更改为您使用的按钮ID .
回答by Lukas Mohs
If you can get a Viewin that fragment, you can access the context from there:
如果您可以View在该片段中获得 a ，则可以从那里访问上下文：
view.getContext().startActivity(intent);
回答by bunty785
public class OneWayFragment extends Fragment {
ImageView img_search;
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.one_way_fragment, container, false);
img_search = (ImageView) view.findViewById(R.id.search);
img_search.setOnClickListener(new View.OnClickListener() {
@Override`enter code here`
public void onClick(View v) {
Intent displayFlights = new Intent(getActivity(), SelectFlight.class);
startActivity(displayFlights);
}
});
回答by Madhu Jayarama
You need to use getActivity() method from fragment for Intents.
您需要将片段中的 getActivity() 方法用于 Intent。
Intent intent = new Intent(getActivity(), SecondActivity.class);
startActivity(intent);
回答by user9518168
FragmentManager fragmentManager = getFragmentManager();
fragmentManager.beginTransaction().replace(R.id.frame, new MySchedule()).commit();
MySchedule is the name of my java class.
MySchedule 是我的 java 类的名称。
