使用 FragmentsActivity 启动新意图 - 崩溃答案

【问题标题】：Starting a new intent with FragmentsActivity - crashes使用 FragmentsActivity 启动新意图 - 崩溃
【发布时间】：2014-05-17 16:16:49
【问题描述】：

这是我的第一个问题，我已经搜索过答案，但找不到。我的应用程序以 SplashScreen 视频开始，视频完成后，Activity 尝试启动我的 MainActivity，它扩展了 FragmentActivity。但是应用程序崩溃并显示以下日志：

05-17 11:32:56.554: W/Binder(476): Caught a RuntimeException from the binder stub implementation.
05-17 11:32:56.554: W/Binder(476): java.lang.NullPointerException
05-17 11:32:56.554: W/Binder(476):  at android.inputmethodservice.IInputMethodWrapper.setSessionEnabled(IInputMethodWrapper.java:280)
05-17 11:32:56.554: W/Binder(476):  at com.android.internal.view.IInputMethod$Stub.onTransact(IInputMethod.java:129)
05-17 11:32:56.554: W/Binder(476):  at android.os.Binder.execTransact(Binder.java:404)
05-17 11:32:56.554: W/Binder(476):  at dalvik.system.NativeStart.run(Native Method)
05-17 11:32:56.554: W/InputMethodManagerService(360): Got RemoteException sending setActive(false) notification to pid 1075 uid 10052
05-17 11:32:56.574: W/IInputConnectionWrapper(514): showStatusIcon on inactive InputConnection

这是我的 SplashScreen 类的样子：

public class SplashScreen extends Activity {
    // Splash screen timer
    private static int SPLASH_TIME_OUT = 6000;
    public void Skip(View v) {
        SPLASH_TIME_OUT = 0;
    }

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

        VideoView mVideoView = (VideoView)findViewById(R.id.intro);
        String uriPath = "android.resource://de.ebs_hannover.sean.elsaapp/"+R.raw.intro_vid;
        Uri uri = Uri.parse(uriPath);
        mVideoView.setVideoURI(uri);
        mVideoView.requestFocus();
        mVideoView.start();

        new Handler().postDelayed(new Runnable() {

            @Override
            public void run() {
                // This method will be executed once the timer is over
                // Start your app main activity
                Intent i = new Intent(SplashScreen.this, MainActivity.class);
                startActivity(i);

                // close this activity
                finish();
            }
        }, SPLASH_TIME_OUT);
    }
}

这是我的 MainActivity：

public class MainActivity extends FragmentActivity{
    ViewPager viewPager=null;
    TextView cPosTxt =null;
    @Override
    protected void onCreate(Bundle arg0) {
        super.onCreate(arg0);
        setContentView(R.layout.activity_main);
        cPosTxt =  (TextView) findViewById(R.id.cPosTxt);
        viewPager= (ViewPager) findViewById(R.id.pager);
        FragmentManager fragmentManager=getSupportFragmentManager();
        viewPager.setAdapter(new MyAdapter(fragmentManager));
        viewPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {

            @Override
            public void onPageSelected(int arg0) {
                if(arg0==0) {
                    cPosTxt.setText(R.string.menue);
                }
                if (arg0==1) {
                    cPosTxt.setText(R.string.btn_jubi);
                }
                if (arg0==2) {
                    cPosTxt.setText(R.string.btn_info);
                } 
                if (arg0==3) {
                    cPosTxt.setText(R.string.btn_story);
                } 
                if (arg0==4) {
                    cPosTxt.setText(R.string.btn_events);
                }
                if (arg0==5) {
                    cPosTxt.setText(R.string.btn_current);
                }
            }

            @Override
            public void onPageScrollStateChanged(int arg0) {
                // TODO Auto-generated method stub

            }

            @Override
            public void onPageScrolled(int arg0, float arg1, int arg2) {
                // TODO Auto-generated method stub

            }
        });
    }
    public void StroemClick(View v) {
        viewPager.setCurrentItem(0, true);
    }
    public void JubiClick(View v) {
        viewPager.setCurrentItem(1, true);
    }
    public void InfoClick(View v) {
        viewPager.setCurrentItem(2, true);
    }
    public void StoryClick(View v) {
        viewPager.setCurrentItem(3, true);
    }
    public void EventsClick(View v) {
        viewPager.setCurrentItem(4, true);
    }
    public void CurrentClick(View v) {
        viewPager.setCurrentItem(5, true);
    }
}
class MyAdapter extends FragmentStatePagerAdapter {
    public MyAdapter(FragmentManager fm) {
        super(fm);
    }
    @Override
    public Fragment getItem(int arg0) {
        Fragment fragment=null;
        if(arg0==0){
            fragment=new MenuFragment();
        }
        if(arg0==1) {
            fragment=new JubiFragment();
        }
        if(arg0==2) {
            fragment=new InfoFragment();
        }
        if(arg0==3){
            fragment=new StoryFragment();
        }
        if(arg0==4){
            fragment=new EventsFragment();
        }
        if(arg0==5){
            fragment=new CurrentFragment();
        }
        return fragment;
    }
    @Override
    public int getCount() {
        return 6;
    }
}

为了以防万一（因为我建议这可能是问题所在）这里也是我的清单：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="de.ebs_hannover.sean.elsaapp"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="19" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@android:style/Theme.NoTitleBar.Fullscreen" >
        <activity
            android:name="de.ebs_hannover.sean.elsaapp.SplashScreen"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

我做错了什么？一开始没有 SplashScreen 它工作正常...所以当我将 MainActivity 设置为清单中的启动器活动时...感谢您的帮助:)

【问题讨论】：

发布您的完整堆栈跟踪..
嗯...我现在感觉很垃圾 :D 真的就是这么简单...谢谢你的帮助

标签： java android android-intent crash android-fragmentactivity

【解决方案1】：

尝试在<application> 标签中添加MainActivity 类：

<application
    android:allowBackup="true"
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name"
    android:theme="@android:style/Theme.NoTitleBar.Fullscreen" >
    <activity
        android:name="de.ebs_hannover.sean.elsaapp.SplashScreen"
        android:label="@string/app_name" >
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
    // ADD ALL ACTIVITIES LIKE THIS:
    <activity
        android:name="de.ebs_hannover.sean.elsaapp.MainActivity"
        android:label="@string/app_name" />
</application>

【讨论】：