Runnable Timer无法正常工作

Question

我在启动应用时使用启动画面显示。但是，设定的时间似乎不会改变持续时间，它会持续大约10-12秒。

这是java文件

public class SplashScreenActivity extends AppCompatActivity {


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

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


            @Override
            public void run() {

                Intent i = new Intent(SplashScreenActivity.this, MainActivity.class);
                startActivity(i);
                finish();
            }
        }, 2000);
    }
}

XML文件

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"

    android:orientation="vertical">

</LinearLayout>

正如您所看到的，我已将其设置为显示2秒钟，这里有什么问题？

编辑：

MainActivity.java

public class MainActivity extends AppCompatActivity implements AdapterView.OnItemClickListener {

    private ActionBarDrawerToggle drawerToggle;
    private ActionBar actionBar;
    private DrawerLayout drawerLayout;
    private ListView navList;
    private FragmentTransaction fragmentTransaction;
    private FragmentManager fragmentManager;

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


        navList = (ListView) findViewById(R.id.navigationdrawer);
        ArrayList<String> navArray = new ArrayList<String>();
        navArray.add("Home");
        navArray.add("Media");



        ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
                android.R.layout.simple_list_item_activated_1,
                navArray);
        navList.setAdapter(adapter);
        navList.setOnItemClickListener(this);
        navList.setChoiceMode(ListView.CHOICE_MODE_SINGLE);


        drawerLayout = (DrawerLayout) findViewById(R.id.drawerLayout);
        drawerToggle = new ActionBarDrawerToggle(this, drawerLayout, R.string.open_drawer, R.string.close_drawer);

        drawerLayout.setDrawerListener(drawerToggle);

        actionBar = getSupportActionBar();
        assert getSupportActionBar() != null;
        actionBar.setDisplayHomeAsUpEnabled(true);
        actionBar.setDisplayShowHomeEnabled(true);

        actionBar.setDisplayOptions(actionBar.getDisplayOptions() | ActionBar.DISPLAY_SHOW_CUSTOM);
        ImageView imageView = new ImageView(actionBar.getThemedContext());
        imageView.setScaleType(ImageView.ScaleType.CENTER);
        imageView.setImageResource(R.drawable.df);
        ActionBar.LayoutParams layoutParams = new ActionBar.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT,
                Gravity.RIGHT| Gravity.CENTER_VERTICAL);
        layoutParams.rightMargin = 20;
        imageView.setLayoutParams(layoutParams);
        actionBar.setCustomView(imageView);

        fragmentManager = getSupportFragmentManager();
        fragmentTransaction = fragmentManager.beginTransaction();
        loadSelection(0);
    }

    private void loadSelection(int i){
        navList.setItemChecked(i, true);

        switch (i){

            case 0 :
                HomeFragment homeFragment = new HomeFragment();
                fragmentTransaction = fragmentManager.beginTransaction();
                fragmentTransaction.replace(R.id.fragmentholder, homeFragment)
                        .commit();
                actionBar.setTitle("Home");
                break;

            case 1 :
                MediaFragment mediaFragment = new MediaFragment();
                fragmentTransaction = fragmentManager.beginTransaction();
                fragmentTransaction.replace(R.id.fragmentholder, mediaFragment)
                        .commit();
                actionBar.setTitle("Media");
                break;

        }

    }

    @Override
    protected void onPostCreate(Bundle savedInstanceState) {
        super.onPostCreate(savedInstanceState);
        drawerToggle.syncState();
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        int id = item.getItemId();

        if (id == android.R.id.home) {
            if (drawerLayout.isDrawerOpen(navList)) {
                drawerLayout.closeDrawer(navList);
            } else {
                drawerLayout.openDrawer(navList);
            }

        }
        return super.onOptionsItemSelected(item);
    }

    @Override
    public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
        loadSelection(position);
        drawerLayout.closeDrawer(navList);
    }

    @Override
    public void onBackPressed() {
        new AlertDialog.Builder(this)
                .setMessage("Exit the application?")
                .setCancelable(false)
                .setPositiveButton("Yes", new DialogInterface.OnClickListener(){
                    public void onClick(DialogInterface dialog, int id){
                        MainActivity.this.finish();
                    }
                })
                .setNegativeButton("No", null)
                .show();
    }
}

清单

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools">

    <uses-permission android:name="android.permission.INTERNET"/>

    <application
        android:allowBackup="true"
        android:icon="@mipmap/launcher"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">

        <meta-data android:name="com.facebook.sdk.ApplicationId" android:value="@string/facebook_app_id"/>

        <activity
            android:name=".SplashScreenActivity"
            android:configChanges="keyboardHidden|orientation|screenSize"
            android:theme="@style/AppTheme.NoActionBar">
            >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity
            android:name=".MainActivity"
            android:screenOrientation="portrait"></activity>

    </application>    
</manifest>

styles.xml的相关部分

<style name="AppTheme.NoActionBar" parent="Theme.AppCompat.NoActionBar">
        <item name="android:background">@drawable/splash</item>
        <item name="android:windowFullscreen">true</item>
        <item name="android:windowNoTitle">true</item>

    </style>