相关疑难解决方法(0)

我有一个带有三个标签的应用程序.

每个选项卡都有自己的布局.xml文件.main.xml有自己的地图片段.这是应用程序首次启动时显示的那个.

除了在标签之间切换时,一切正常.如果我尝试切换回地图片段选项卡,我会收到此错误.切换到其他选项卡之间和之间的工作正常.

这可能有什么问题？

这是我的主类和我的main.xml,以及我使用的相关类(你也会在底部找到错误日志)

主要班级

package com.nfc.demo;

import android.app.ActionBar;
import android.app.ActionBar.Tab;
import android.app.Activity;
import android.app.Fragment;
import android.app.FragmentTransaction;
import android.os.Bundle;
import android.widget.Toast;

public class NFCDemoActivity extends Activity {

    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        ActionBar bar = getActionBar();
        bar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
        bar.setDisplayOptions(0, ActionBar.DISPLAY_SHOW_TITLE);

        bar.addTab(bar
                .newTab()
                .setText("Map")
                .setTabListener(
                        new TabListener<MapFragment>(this, "map",
                                MapFragment.class)));
        bar.addTab(bar
                .newTab()
                .setText("Settings")
                .setTabListener(
                        new TabListener<SettingsFragment>(this, "settings",
                                SettingsFragment.class)));
        bar.addTab(bar
                .newTab()
                .setText("About")
                .setTabListener(
                        new TabListener<AboutFragment>(this, "about",
                                AboutFragment.class)));

        if (savedInstanceState != null) {
            bar.setSelectedNavigationItem(savedInstanceState.getInt("tab", 0));
        }
        // setContentView(R.layout.main);

    }

    @Override
    protected void onSaveInstanceState(Bundle …

我使用以下代码获取runtimeException,有人知道为什么吗？

public class FragsApplicationActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
    }
}

SuggestionFrags类

public class SuggestionFrags extends Fragment{
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        return super.onCreateView(inflater, container, savedInstanceState);
    }

}

main.xml中

<?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" >

    <fragment
        android:id="@+id/fragment1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        class="com.samplefragsapplication.SuggestionFrags" />

</LinearLayout>

我得到这个例外:

11-23 18:09:23.899: E/AndroidRuntime(2436): FATAL EXCEPTION: main
11-23 18:09:23.899: E/AndroidRuntime(2436): …

我正在使用Android导航组件进行导航.我有一个LoginFragment,它有一个按钮可以转换到SignUpFragment.单击按钮我收到此错误.

java.lang.IllegalStateException: View android.support.v7.widget.AppCompatButton{49d9bd1 VFED..C.. ...P.... 201,917-782,1061 #7f090172 app:id/signUpLink} does not have a NavController set

这是我的nav_graph.xml

<navigation xmlns:app="http://schemas.android.com/apk/res-auto"
        xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:tools="http://schemas.android.com/tools"
        app:startDestination="@id/loginFragment">
        <fragment
            android:id="@+id/loginFragment"
            android:name="org.fossasia.openevent.app.core.auth.login.LoginFragment"
            android:label="login_fragment"
            tools:layout="@layout/login_fragment">
            <action
                android:id="@+id/action_loginFragment_to_signUpFragment"
                app:destination="@id/signUpFragment" />

        </fragment>
    </navigation>

以下是LoginFragment for Navigation中的代码 -

binding.signUpLink.setOnClickListener(Navigation.createNavigateOnClickListener(R.id.action_loginFragment_to_signUpFragment, null));

以下是NavHostFragment的活动布局文件的摘录 -

<FrameLayout
            android:id="@+id/fragment_container"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            app:layout_behavior="@string/appbar_scrolling_view_behavior"
            android:name="android.navigation.fragment.NavHostFragment"
            app:navGraph="@navigation/main_navigation"
            app:defaultNavHost="true"/>

我正在使用片段,当我更改方向时应用程序崩溃.这是日志猫:

05-29 05:56:52.158: E/AndroidRuntime(1428): java.lang.RuntimeException: Unable to start activity     ComponentInfo{com.example.bajraregistertesteclipse/com.example.bajraregistertesteclipse.MainActivity}: android.view.InflateException: Binary XML file line #16: Error inflating class fragment
05-29 05:56:52.158: E/AndroidRuntime(1428):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230)
05-29 05:56:52.158: E/AndroidRuntime(1428):     at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:3692)
05-29 05:56:52.158: E/AndroidRuntime(1428):     at android.app.ActivityThread.access$700(ActivityThread.java:141)
05-29 05:56:52.158: E/AndroidRuntime(1428):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1240)
05-29 05:56:52.158: E/AndroidRuntime(1428):     at android.os.Handler.dispatchMessage(Handler.java:99)
05-29 05:56:52.158: E/AndroidRuntime(1428):     at android.os.Looper.loop(Looper.java:137)
05-29 05:56:52.158: E/AndroidRuntime(1428):     at android.app.ActivityThread.main(ActivityThread.java:5039)
05-29 05:56:52.158: E/AndroidRuntime(1428):     at java.lang.reflect.Method.invokeNative(Native Method)
05-29 05:56:52.158: E/AndroidRuntime(1428):     at java.lang.reflect.Method.invoke(Method.java:511)
05-29 05:56:52.158: E/AndroidRuntime(1428):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
05-29 05:56:52.158: E/AndroidRuntime(1428):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
05-29 06:17:02.864: E/AndroidRuntime(1554): java.lang.RuntimeException: …

我在本教程中添加了Crosswalk eclipse:ClickHere 我完成了教程中的所有操作并且没有错误,但是当我在手机上启动应用程序时,我有这样的:

02-19 13:37:08.147: E/AndroidRuntime(21108): FATAL EXCEPTION: main
02-19 13:37:08.147: E/AndroidRuntime(21108): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.crosswalktest/com.example.crosswalktest.MainActivity}: android.view.InflateException: Binary XML file line #1: Error inflating class org.xwalk.core.XWalkView
02-19 13:37:08.147: E/AndroidRuntime(21108):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2092)
02-19 13:37:08.147: E/AndroidRuntime(21108):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2117)
02-19 13:37:08.147: E/AndroidRuntime(21108):    at android.app.ActivityThread.access$700(ActivityThread.java:134)
02-19 13:37:08.147: E/AndroidRuntime(21108):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1218)
02-19 13:37:08.147: E/AndroidRuntime(21108):    at android.os.Handler.dispatchMessage(Handler.java:99)
02-19 13:37:08.147: E/AndroidRuntime(21108):    at android.os.Looper.loop(Looper.java:137)
02-19 13:37:08.147: E/AndroidRuntime(21108):    at android.app.ActivityThread.main(ActivityThread.java:4867)
02-19 13:37:08.147: E/AndroidRuntime(21108):    at java.lang.reflect.Method.invokeNative(Native Method)
02-19 13:37:08.147: E/AndroidRuntime(21108):    at java.lang.reflect.Method.invoke(Method.java:511)
02-19 13:37:08.147: E/AndroidRuntime(21108):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1007) …

我一直在处理这个问题一段时间了.我使用这个问题作为参考: 使用ActionBarSherlock和New SupportMapFragment

我目前正在使用ActionBarSherlock,我正在使用Vipul Shah相当简单的地图实现.它的工作非常出色,完全符合我的需要.但是,在Orientation更改时,整个应用程序崩溃.这是我的日志:

java.lang.RuntimeException: Unable to start activity ComponentInfo{com.meetball_1/com.meetball_1.HomeActivity}: android.view.InflateException: Binary XML file line #17: Error inflating class fragment
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2211)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261)
    at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:3740)
    at android.app.ActivityThread.access$700(ActivityThread.java:141)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1262)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:137)
    at android.app.ActivityThread.main(ActivityThread.java:5103)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:525)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
    at dalvik.system.NativeStart.main(Native Method)
    Caused by: android.view.InflateException: Binary XML file line #17: 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:267)
    at com.actionbarsherlock.internal.ActionBarSherlockNative.setContentView(ActionBarSherlockNative.java:133)
    at com.actionbarsherlock.app.SherlockFragmentActivity.setContentView(SherlockFragmentActivity.java:261)
    at …

在我使用支持库v7的应用程序中,我想添加一个首选项屏幕.由于Google完全没有提供有关该主题的文档,因此我查找了Stack Overflow上其他地方发现的帖子.

所以这是我的项目:

activity_preferences.xml

<?xml version="1.0" encoding="UTF-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:support="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <include layout="@layout/toolbar_default"/>

    <fragment
        android:name=".FragmentPreferences"
        name=".FragmentPreferences"
        android:tag=".FragmentPreferences"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

</LinearLayout>

ActivityPreferences.java

package com.example.testandroidsupportv7;

import com.example.testandroidsupportv7.R;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;

public class ActivityPreferences extends AppCompatActivity
{

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_preferences);
    }

}

FragmentPreferences.java

package com.example.testandroidsupportv7;

import com.example.testandroidsupportv7.R;
import android.os.Bundle;
import android.support.v7.preference.PreferenceFragmentCompat;

public class FragmentPreferences extends PreferenceFragmentCompat
{

    @Override
    public void onCreatePreferences(Bundle bundle, String s) {
        addPreferencesFromResource(R.xml.preferences);
    }

}

AndroidManifest.xml中

<activity
        android:name=".ActivityPreferences"
        android:label="@string/app_name"
        android:theme="@style/MyTheme.NoActionBar" …