我有一个主要的活动,其中包含一个导航抽屉和几个片段,另一个活动是收集一些我存储在称为“端点”的字符串中的数据.我正在尝试将字符串从辅助活动发送到主要活动的片段之一：
次要活动(通过意图向“主要”活动发送“端点”字符串)：
Intent intent = new Intent(Secondary.this,Main.class);
intent.putExtra("endpoint",endpoint);
startActivity(intent);
主要活动(从次要活动获取字符串)：
public void onNavigationDrawerItemSelected(int position) {
// update the main content by replacing fragments
FragmentManager fragmentManager = getFragmentManager();
fragmentManager.beginTransaction()
.replace(R.id.container, PlaceholderFragment.newInstance(position))
.commit();
switch (position) {
case 0:
Bundle args = new Bundle();
args.putString("endpoint",getIntent().getExtras().getString("endpoint"));
Fragment1 fragment = new Fragment1();
fragment1.setArguments(args);
fragmentManager.beginTransaction().replace(R.id.container, Fragment1.newInstance(position)).commit();
break;
case 1:
fragmentManager.beginTransaction().replace(R.id.container, Fragment2newInstance(position)).commit();
break;
case 2:
fragmentManager.beginTransaction().replace(R.id.container, Fragment3.newInstance(position)).commit();
break;
case 3: ...
在Fragment类上,我试图在TextView上显示数据：
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
String endpoints = getActivity().getIntent().getStringExtra("endpointStr");
View rootView = inflater.inflate(R.layout.fragment_overview, container, false);
TextView textView = (TextView) rootView.findViewById(R.id.overviewTV);
textView.setText(endpoint);
return rootView;
}
这是我得到的：
E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: com.Main.app, PID: 16681
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.Main.app/com.Main.app.Main}:
android.view.InflateException: Binary XML file line #30: Error
inflating class fragment
Caused by: android.view.InflateException: Binary XML file line #30: Error inflating class fragment
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:713)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:755)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:758)
at android.view.LayoutInflater.inflate(LayoutInflater.java:492)
at android.view.LayoutInflater.inflate(LayoutInflater.java:397)
at android.view.LayoutInflater.inflate(LayoutInflater.java:353)
at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:343)
at android.app.Activity.setContentView(Activity.java:1929)
at com.Main.app.Main.onCreate(Main.java:42)
at android.app.Activity.performCreate(Activity.java:5231)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2169)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2271)
at android.app.ActivityThread.access$800(ActivityThread.java:144)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1205)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5146)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:732)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:566)
at dalvik.system.NativeStart.main(Native Method)06003
at android.view.LayoutInflater.rInflate(LayoutInflater.java:755)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:758)
at android.view.LayoutInflater.inflate(LayoutInflater.java:492)
at android.view.LayoutInflater.inflate(LayoutInflater.java:397)
at android.view.LayoutInflater.inflate(LayoutInflater.java:353)
at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:343)
at android.app.Activity.setContentView(Activity.java:1929)
at com.Main.app.Main.onCreate(Main.java:42)
at android.app.Activity.performCreate(Activity.java:5231)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2169)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2271)
at android.app.ActivityThread.access$800(ActivityThread.java:144)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1205)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5146)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:732)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:566)
at dalvik.system.NativeStart.main(Native Method)
如何固定它并将字符串从一个活动发送到另一个活动的片段？
这是XML：
<!-- A DrawerLayout is intended to be used as the top-level content view using match_parent for both width and height to consume the full space available. -->
<FrameLayout
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"
android:fitsSystemWindows="true">
<android.support.v4.widget.DrawerLayout
android:id="@+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#ffffff"
tools:context=".Stackerz">
<!-- As the main content view, the view below consumes the entire
space available using match_parent in both dimensions. -->
<FrameLayout
android:id="@+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"
/>
<!-- android:layout_gravity="start" tells DrawerLayout to treat
this as a sliding drawer on the left side for left-to-right
languages and on the right side for right-to-left languages.
If you're not building against API 17 or higher, use
android:layout_gravity="left" instead. -->
<!-- The drawer is given a fixed width in dp and extends the full height of
the container. -->
<fragment android:id="@+id/navigation_drawer"
android:layout_width="@dimen/navigation_drawer_width"
android:layout_height="match_parent"
android:layout_gravity="start"
android:name="com.xxxxxx.app.NavigationDrawerFragment"
tools:layout="@layout/fragment_navigation_drawer" />
</android.support.v4.widget.DrawerLayout>
</FrameLayout>
解决方法:
好的,这就是您的Constants类的外观.
public class Constants {
public static Constants constants=null;
public static Constants shared(){
if (constants==null){
constants = new Constants();
}
return constants;
}
public static String endpoint;
public static String getEndpoint() {
return endpoint;
}
public static void setEndpoint(String endpoint) {
Constants.endpoint = endpoint;
}
}
现在,在第二个活动中,执行以下操作：
Constants.shared().setEndpoint(endpoint);
Intent intent = new Intent(Secondary.this,Main.class);
startActivity(intent);
然后在您的Fragment类中,执行以下操作：
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
String endpoint = Constants.shared().getEndpoint;
View rootView = inflater.inflate(R.layout.fragment_overview, container, false);
TextView textView = (TextView) rootView.findViewById(R.id.overviewTV);
textView.setText(endpoint);
return rootView;
}