我是Android编程的新手。我正在尝试使用启动画面开发应用程序。看了几个教程＆amp;开始这样做了。该应用程序显示启动画面，但几秒钟后崩溃。尝试了StackExchage上给出的建议，但没有奏效。在将此帖子关闭为重复之前，请查看我的代码。
这是我的 SplashScreen.java
package collegeproject.mvjce.edu.boat;
import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
/**
* Created by AURO on 3/6/2016.
*/
public class SplashScreen extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.splash_screen_layout);
Thread myThread = new Thread() {
@Override
public void run() {
try {
sleep(3000);
} catch (InterruptedException e) {
e.printStackTrace();
}
finally {
Intent startMain = new Intent(getApplicationContext(), MainActivity.class);
startActivity(startMain);
finish();
}
}
};
myThread.start();
}
}
这是我的 splash_screen_layout.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:src="@drawable/splash_screen"
android:id="@+id/splashView" />
</LinearLayout>
这是我的 AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="collegeproject.mvjce.edu.boat">
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity
android:name=".SplashScreen"
android:label="@string/app_name"
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"/>
</application>
</manifest>
这是我的 logcat
03-06 21:38:22.446 18366-18366/collegeproject.mvjce.edu.boat E/AndroidRuntime: FATAL EXCEPTION: main
Process: collegeproject.mvjce.edu.boat, PID: 18366
java.lang.RuntimeException: Unable to start activity ComponentInfo{collegeproject.mvjce.edu.boat/collegeproject.mvjce.edu.boat.MainActivity}: java.lang.IllegalStateException: This Activity already has an action bar supplied by the window decor. Do not request Window.FEATURE_SUPPORT_ACTION_BAR and set windowActionBar to false in your theme to use a Toolbar instead.
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2358)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2420)
at android.app.ActivityThread.access$900(ActivityThread.java:154)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1321)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5292)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:904)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:699)
Caused by: java.lang.IllegalStateException: This Activity already has an action bar supplied by the window decor. Do not request Window.FEATURE_SUPPORT_ACTION_BAR and set windowActionBar to false in your theme to use a Toolbar instead.
at android.support.v7.app.AppCompatDelegateImplV7.setSupportActionBar(AppCompatDelegateImplV7.java:198)
at android.support.v7.app.AppCompatActivity.setSupportActionBar(AppCompatActivity.java:99)
at collegeproject.mvjce.edu.boat.MainActivity.onCreate(MainActivity.java:19)
at android.app.Activity.performCreate(Activity.java:5990)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1106)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2311)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2420)
at android.app.ActivityThread.access$900(ActivityThread.java:154)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1321)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5292)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:904)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:699)
这是我的 style.xml
<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>
这是我的 style.xml（v21）
<resources>>
<style name="AppTheme.NoActionBar">
<item name="windowActionBar">false</item>
<item name="windowNoTitle">true</item>
<item name="android:windowDrawsSystemBarBackgrounds">true</item>
<item name="android:statusBarColor">@android:color/transparent</item>
</style>
</resources>
我没有碰过MainActivity.java，activity_main.xml＆amp; content.xml，因此我没有在这里给出他们的代码。如果你需要看一下，请告诉我。
我不知道问题似乎是什么。我已经看过10多个寻找修复的教程，已经在StackExchange和amp;上读过几个线程。相应地更改了我的代码，但似乎没有任何效果。因此我发布了这个问题。
感谢您的时间！
答案 0 :(得分：1)
这是由于样式主题类型冲突。
只需对styles.xml
<style name="AppTheme.NoActionBar">
<item name="windowActionBar">false</item>
<item name="windowNoTitle">true</item>
</style>
并确保您的AndroidManifest.xml应用标记的主题属性设置为@style/AppTheme.NoActionBar
如果您将样式主题设置为类型DarkActionBar或LightActionBar或类似ActionBar的内容，则无法使用自定义工具栏自定义ActionBar。
这就是为什么您要将主题设置为NoActionBar以使用setSuportActionBar(custom_toolbar)等功能进行自定义更改。