我正在尝试将Splash Screen添加到我的应用中

Question

我一直在尝试使用网站上提供的许多代码帮助实现启动画面到我的应用程序，但没有一个对我有效。 每次应用程序在显示启动画面3秒后崩溃。 我不知道自己哪里出错了，请更正我的代码以正确显示启动画面！谢谢 ！

//这是我的主要活动

 1. public class MainActivity extends AppCompatActivity {

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

            Button one = (Button) this.findViewById(R.id.gg);
            final MediaPlayer mp1 = MediaPlayer.create(this, R.raw.gg);
            one.setOnClickListener(new View.OnClickListener(){
                public void onClick(View v) {
                    Toast.makeText(MainActivity.this, "Good Game", Toast.LENGTH_SHORT).show();
                    mp1.start();
                }
            });

            Button two = (Button) this.findViewById(R.id.gm);
            final MediaPlayer mp2 = MediaPlayer.create(this, R.raw.gm);
            two.setOnClickListener(new View.OnClickListener(){
                public void onClick(View v) {
                    Toast.makeText(MainActivity.this, "Oh, They got me!", Toast.LENGTH_SHORT).show();
                    mp2.start();
                }
            });

            Button three = (Button) this.findViewById(R.id.cb);
            final MediaPlayer mp3 = MediaPlayer.create(this, R.raw.cb);
            three.setOnClickListener(new View.OnClickListener(){
                public void onClick(View v) {
                    Toast.makeText(MainActivity.this, "Come on boy", Toast.LENGTH_SHORT).show();
                    mp3.start();
                }
            });

            Button four = (Button) this.findViewById(R.id.ns);
            final MediaPlayer mp4 = MediaPlayer.create(this, R.raw.ns);
            four.setOnClickListener(new View.OnClickListener(){
                public void onClick(View v) {
                    Toast.makeText(MainActivity.this, "Nice shot", Toast.LENGTH_SHORT).show();
                    mp4.start();
                }
            });

            Button five = (Button) this.findViewById(R.id.wp);
            final MediaPlayer mp5 = MediaPlayer.create(this, R.raw.wp);
            five.setOnClickListener(new View.OnClickListener(){
                public void onClick(View v) {
                    Toast.makeText(MainActivity.this, "You wanna piece of me!", Toast.LENGTH_SHORT).show();
                    mp5.start();
                }
            });

            Button six = (Button) this.findViewById(R.id.bi);
            final MediaPlayer mp6 = MediaPlayer.create(this, R.raw.bi);
            six.setOnClickListener(new View.OnClickListener(){
                public void onClick(View v) {
                    Toast.makeText(MainActivity.this, "Bring it", Toast.LENGTH_SHORT).show();
                    mp6.start();
                }
            });

            Button seven = (Button) this.findViewById(R.id.lg);
            final MediaPlayer mp7 = MediaPlayer.create(this, R.raw.lg);
            seven.setOnClickListener(new View.OnClickListener(){
                public void onClick(View v) {
                    Toast.makeText(MainActivity.this, "Let’s go, Yeah!", Toast.LENGTH_SHORT).show();
                    mp7.start();
                }
            });

            Button eight = (Button) this.findViewById(R.id.ru);
            final MediaPlayer mp8 = MediaPlayer.create(this, R.raw.ru);
            eight.setOnClickListener(new View.OnClickListener(){
                public void onClick(View v) {
                    Toast.makeText(MainActivity.this, "Ready Up", Toast.LENGTH_SHORT).show();
                    mp8.start();
                }
            });

            Button nine = (Button) this.findViewById(R.id.nn);
            final MediaPlayer mp9 = MediaPlayer.create(this, R.raw.nn);
            nine.setOnClickListener(new View.OnClickListener(){
                public void onClick(View v) {
                    Toast.makeText(MainActivity.this, "Nooooo", Toast.LENGTH_SHORT).show();
                    mp9.start();
                }
            });

            Button ten = (Button) this.findViewById(R.id.cm);
            final MediaPlayer mp10 = MediaPlayer.create(this, R.raw.cm);
            ten.setOnClickListener(new View.OnClickListener(){
                public void onClick(View v) {
                    Toast.makeText(MainActivity.this, "Cover me", Toast.LENGTH_SHORT).show();
                    mp10.start();
                }
            });

            Button eleven = (Button) this.findViewById(R.id.hh);
            final MediaPlayer mp11 = MediaPlayer.create(this, R.raw.hh);
            eleven.setOnClickListener(new View.OnClickListener(){
                public void onClick(View v) {
                    Toast.makeText(MainActivity.this, "Hoo-ya", Toast.LENGTH_SHORT).show();
                    mp11.start();
                }
            });

            Button twelve = (Button) this.findViewById(R.id.mo);
            final MediaPlayer mp12 = MediaPlayer.create(this, R.raw.mo);
            twelve.setOnClickListener(new View.OnClickListener(){
                public void onClick(View v) {
                    Toast.makeText(MainActivity.this, "Move out", Toast.LENGTH_SHORT).show();
                    mp12.start();
                }
            });

            Button thirteen = (Button) this.findViewById(R.id.gs);
            final MediaPlayer mp13 = MediaPlayer.create(this, R.raw.gs);
            thirteen.setOnClickListener(new View.OnClickListener(){
                public void onClick(View v) {
                    Toast.makeText(MainActivity.this, "Get Some", Toast.LENGTH_SHORT).show();
                    mp13.start();
                }
            });


            Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
            setSupportActionBar(toolbar);

            FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
            fab.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    Snackbar.make(view, "Your Messege",Snackbar.LENGTH_LONG)
                            .setAction("Action", null).show();
                }
            });
        }

        @Override
        public boolean onCreateOptionsMenu(Menu menu) {
            // Inflate the menu; this adds items to the action bar if it is present.
            getMenuInflater().inflate(R.menu.menu_main, menu);
            return true;
        }

        @Override
        public boolean onOptionsItemSelected(MenuItem item) {
            // Handle action bar item clicks here. The action bar will
            // automatically handle clicks on the Home/Up button, so long
            // as you specify a parent activity in AndroidManifest.xml.
            int id = item.getItemId();

            //noinspection SimplifiableIfStatement
            if (id == R.id.action_settings) {
                return true;
            }
            return super.onOptionsItemSelected(item);
        }
    }


//This is my activity_main.xml

 2. <android.support.design.widget.CoordinatorLayout
    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:fitsSystemWindows="true"
        tools:context="com.example.android.mmm.MainActivity">

        <android.support.design.widget.AppBarLayout
            android:id="@+id/app_bar"
            android:layout_width="match_parent"
            android:layout_height="@dimen/app_bar_height"
            android:fitsSystemWindows="true"
            android:theme="@style/AppTheme.AppBarOverlay">

            <android.support.design.widget.CollapsingToolbarLayout
                android:id="@+id/toolbar_layout"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:fitsSystemWindows="true"
                app:contentScrim="?attr/colorPrimary"
                app:layout_scrollFlags="scroll|exitUntilCollapsed">

                <android.support.v7.widget.Toolbar
                    android:id="@+id/toolbar"
                    android:layout_width="match_parent"
                    android:layout_height="?attr/actionBarSize"
                    app:layout_collapseMode="pin"
                    app:popupTheme="@style/AppTheme.PopupOverlay" />

            </android.support.design.widget.CollapsingToolbarLayout>
        </android.support.design.widget.AppBarLayout>

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

        <android.support.design.widget.FloatingActionButton
            android:id="@+id/fab"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_margin="@dimen/fab_margin"
            app:layout_anchor="@id/app_bar"
            app:layout_anchorGravity="bottom|end"
            app:srcCompat="@android:drawable/ic_dialog_email" />

    </android.support.design.widget.CoordinatorLayout>


//This is content_main.xml

 3. <android.support.v4.widget.NestedScrollView
        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"
        app:layout_behavior="@string/appbar_scrolling_view_behavior"
        tools:context="com.example.android.mmm.MainActivity"
        tools:showIn="@layout/activity_main">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="vertical"
            android:background="#000000">

            <Button
                android:layout_width="100dp"
                android:layout_height="48dp"
                android:text="GG"
                android:id="@+id/gg"
                android:textSize="18sp"
                android:textAllCaps="true"
                android:textStyle="bold"
                android:textColor="#000000"
                tools:ignore="HardcodedText"
                android:layout_marginTop="16dp"
                android:layout_gravity="center_horizontal"/>

            <Button
                android:id="@+id/gm"
                android:layout_width="100dp"
                android:layout_height="48dp"
                android:layout_gravity="center_horizontal"
                android:layout_marginTop="16dp"
                android:text="GM"
                android:textAllCaps="true"
                android:textColor="#000000"
                android:textSize="18sp"
                android:textStyle="bold"
                tools:ignore="HardcodedText" />

            <Button
                android:layout_width="100dp"
                android:layout_height="48dp"
                android:text="CB"
                android:id="@+id/cb"
                android:textSize="18sp"
                android:textAllCaps="true"
                android:textStyle="bold"
                android:textColor="#000000"
                tools:ignore="HardcodedText"
                android:layout_marginTop="16dp"
                android:layout_gravity="center_horizontal"/>

            <Button
                android:layout_width="100dp"
                android:layout_height="48dp"
                android:text="NS"
                android:id="@+id/ns"
                android:textSize="18sp"
                android:textAllCaps="true"
                android:textStyle="bold"
                android:textColor="#000000"
                tools:ignore="HardcodedText"
                android:layout_marginTop="16dp"
                android:layout_gravity="center_horizontal"/>

            <Button
                android:layout_width="100dp"
                android:layout_height="48dp"
                android:text="WP"
                android:id="@+id/wp"
                android:textSize="18sp"
                android:textAllCaps="true"
                android:textStyle="bold"
                android:textColor="#000000"
                tools:ignore="HardcodedText"
                android:layout_marginTop="16dp"
                android:layout_gravity="center_horizontal"/>

            <Button
                android:layout_width="100dp"
                android:layout_height="48dp"
                android:text="BI"
                android:id="@+id/bi"
                android:textSize="18sp"
                android:textAllCaps="true"
                android:textStyle="bold"
                android:textColor="#000000"
                tools:ignore="HardcodedText"
                android:layout_marginTop="16dp"
                android:layout_gravity="center_horizontal"/>

            <Button
                android:layout_width="100dp"
                android:layout_height="48dp"
                android:text="LG"
                android:id="@+id/lg"
                android:textSize="18sp"
                android:textAllCaps="true"
                android:textStyle="bold"
                android:textColor="#000000"
                tools:ignore="HardcodedText"
                android:layout_marginTop="16dp"
                android:layout_gravity="center_horizontal"/>

            <Button
                android:layout_width="100dp"
                android:layout_height="48dp"
                android:text="RU"
                android:id="@+id/ru"
                android:textSize="18sp"
                android:textAllCaps="true"
                android:textStyle="bold"
                android:textColor="#000000"
                tools:ignore="HardcodedText"
                android:layout_marginTop="16dp"
                android:layout_gravity="center_horizontal"/>

            <Button
                android:layout_width="100dp"
                android:layout_height="48dp"
                android:text="NN"
                android:id="@+id/nn"
                android:textSize="18sp"
                android:textAllCaps="true"
                android:textStyle="bold"
                android:textColor="#000000"
                tools:ignore="HardcodedText"
                android:layout_marginTop="16dp"
                android:layout_gravity="center_horizontal"/>

            <Button
                android:layout_width="100dp"
                android:layout_height="48dp"
                android:text="CM"
                android:id="@+id/cm"
                android:textSize="18sp"
                android:textAllCaps="true"
                android:textStyle="bold"
                android:textColor="#000000"
                tools:ignore="HardcodedText"
                android:layout_marginTop="16dp"
                android:layout_gravity="center_horizontal"/>

            <Button
                android:layout_width="100dp"
                android:layout_height="48dp"
                android:text="HH"
                android:id="@+id/hh"
                android:textSize="18sp"
                android:textAllCaps="true"
                android:textStyle="bold"
                android:textColor="#000000"
                tools:ignore="HardcodedText"
                android:layout_marginTop="16dp"
                android:layout_gravity="center_horizontal"/>

            <Button
                android:layout_width="100dp"
                android:layout_height="48dp"
                android:text="MO"
                android:id="@+id/mo"
                android:textSize="18sp"
                android:textAllCaps="true"
                android:textStyle="bold"
                android:textColor="#000000"
                tools:ignore="HardcodedText"
                android:layout_marginTop="16dp"
                android:layout_gravity="center_horizontal"/>

            <Button
                android:layout_width="100dp"
                android:layout_height="48dp"
                android:text="GS"
                android:id="@+id/gs"
                android:textSize="18sp"
                android:textAllCaps="true"
                android:textStyle="bold"
                android:textColor="#000000"
                tools:ignore="HardcodedText"
                android:layout_marginTop="16dp"
                android:layout_marginBottom="16dp"
                android:layout_gravity="center_horizontal"/>

        </LinearLayout>

    </android.support.v4.widget.NestedScrollView>


//This is AndroidManifest.xml

 4. <manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.android.mmm">

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

    <activity
        android:name=".SplashActivity"
        android:label="@string/app_name"
        android:screenOrientation="portrait"
        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:label="@string/app_name" >
    </activity>
</application>

//This is styles.xml

 5. <resources>

        <!-- Base application theme. -->
        <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
            <!-- Customize your theme here. -->
            <item name="colorPrimary">@color/colorPrimary</item>
            <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
            <item name="colorAccent">@color/colorAccent</item>
        </style>

        <style name="AppTheme.NoActionBar">
            <item name="windowActionBar">false</item>
            <item name="windowNoTitle">true</item>
        </style>

        <style name="AppTheme.AppBarOverlay" parent="ThemeOverlay.AppCompat.Dark.ActionBar" />

        <style name="AppTheme.PopupOverlay" parent="ThemeOverlay.AppCompat.Light" />

    </resources>


//This is my SplashActivity.Java


public class SplashScreen extends Activity {

    // Splash screen timer
    private static int SPLASH_TIME_OUT = 3000;

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

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

            /*
             * Showing splash screen with a timer. This will be useful when you
             * want to show case your app logo / company
             */

            @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);
    }
 }

 6. //This is activity_splash.xml

        <RelativeLayout 
            xmlns:android="http://schemas.android.com/apk/res/android"
            android:layout_width="match_parent"
            android:layout_height="match_parent">

            <ImageView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_centerInParent="true"
                android:src="@drawable/wwe_logo" />

        </RelativeLayout>

Answer 1

AppCompatActivity拥有自己的工具栏，因此您需要使用清单中的android:theme="@style/AppTheme.NoActionBar"将其删除

    <activity
        android:name=".MainActivity"
        android:label="@string/app_name" 
        android:theme="@style/AppTheme.NoActionBar">
    </activity>

虽然如果您没有在工具栏中进行太多自定义，那么您也可以跳过创建自己的工具栏，方法是将其从XML中移除并从java代码中删除它的初始化，但这样做， 您将失去折叠工具栏的功能

Answer 2

制作闪屏实际上非常简单。

<强> 1。创建可绘制 在我的例子中，我创建了一个名为splash.xml的

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android"
android:opacity="opaque">
<item android:drawable="@color/colorWhite" />
<item>
    <bitmap
        android:gravity="center"
        android:src="@drawable/sensesmart_icon" />
</item>

<强> 2。将drawable添加到styles.xml 在这里，我只是将我的drawable添加到样式中：

<style name="SplashTheme" parent="AppTheme">
    <item name="android:windowBackground">@drawable/splash</item>
</style>

第3。添加启动到清单 您想要实际告诉您的应用程序在应用加载之前应该显示初始布局：

<activity android:name=".BaseActivity"
        android:screenOrientation="portrait"
        android:theme="@style/SplashTheme"> <!--Splash screen-->
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />
            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>

<强> 4。在您的开始活动上设置主题 在我的例子中，BaseActivity是启动我的应用程序的活动，因此在我的onCreate()内，我开始设置我的主题：

protected void onCreate(Bundle savedInstanceState) {
    setTheme(R.style.AppTheme);
    setContentView(R.layout.activity_base);
    super.onCreate(savedInstanceState);
}

这是你唯一需要做的事情。如果使用此方法，则启动画面的停留时间不会超过所需时间。加载应用后，您的contentView就会立即启动。

希望这有帮助！