Splash屏幕将不显示 [英] Splash Screen will not display

问题描述

我试图用这个java和xml代码实现一个Splash Screen。我从我的主要活动创建了一个单独的java类，并将java代码放在里面。我在我的布局文件中创建了一个xml布局，并将xml代码放在里面。但是，我的应用程序通常没有启动屏幕。它从来没有显示，但应用程序没有任何错误。 Eclipse也没有显示任何错误。这可能是什么原因？先谢谢你。这是代码。

Java：

  package com.carouseldemo 。主要; 
 
 import android.app.Activity; 
 import android.content.Intent; 
 import android.os.Bundle; 
 import android.os.Handler; 
 import android.view.Menu; 
 
 public class Splash extends Activity {
 
 private final int SPLASH_DISPLAY_LENGHT = 1000; 
 
 / **首次创建活动时调用。 * / 
 @Override 
 public void onCreate（Bundle icicle）{
 super.onCreate（icicle）; 
 setContentView（R.layout.splash）; 
 
 / *新处理程序启动菜单活动
 *并在几秒钟后关闭此Splash-Screen * / 
 new Handler（）。postDelayed（new Runnable（） {
 @Override 
 public void run（）{
 / *创建一个将启动菜单活动的意图* / 
意图mainIntent = new Intent（Splash.this， Menu.class）; 
 Splash.this.startActivity（mainIntent）; 
 Splash.this.finish（）; 
} 
}，SPLASH_DISPLAY_LENGHT）; 
} 
} 
  

XML：

 <？xml version =1.0encoding =utf-8？> 
< LinearLayout xmlns：android =http://schemas.android.com/apk/res/android
 android：orientation =verticalandroid：layout_width =fill_parent
机器人：layout_height = FILL_PARENT > 
< ImageView android：id =@ + id / splashscreenandroid：layout_width =wrap_content
 android：layout_height =fill_parentandroid：src =@ drawable / cat
机器人：layout_gravity = 中心/> 
< TextView android：layout_width =fill_parent
 android：layout_height =wrap_contentandroid：text =Hello World，splash/> 
< / LinearLayout> 
  

清单：

 code><？xml version =1.0encoding =utf-8？> 
< manifest xmlns：android =http://schemas.android.com/apk/res/android
 package =com.carouseldemo.main
 android：versionCode = 1
 android：versionName =1.0
> 
 
< uses-sdk android：minSdkVersion =8android：targetSdkVersion =17android：screenOrientation =portrait/> 
< application android：icon =@ drawable / buttononeandroid：label =@ string / app_name> 
 
< activity android：name =。MainActivityandroid：label =@ string / app_nameandroid：screenOrientation =portraitandroid：configChanges =orientation | keyboardHidden> 
< intent-filter> 
< action android：name =android.intent.action.MAIN/> 
< category android：name =android.intent.category.LAUNCHER/> 
< / intent-filter> 
< / activity> 
 
< / application> 
< / manifest> 
  

解决方案

MainActivity是清单文件中的启动器活动。所以，飞溅没有显示。

将启动器活动MainActivity更改为Splash，并为MainActivity更改另一个。

 < application android：icon =@ drawable / buttononeandroid：label =@ string / app_name> 
 
< activity android：name =。Splashandroid：label =@ string / app_nameandroid：screenOrientation =portraitandroid：configChanges =orientation | keyboardHidden> 
< intent-filter> 
< action android：name =android.intent.action.MAIN/> 
< category android：name =android.intent.category.LAUNCHER/> 
< / intent-filter> 
< / activity> 
< activity android：name =。MainActivity/> 
< / application> 
  

I am trying to implement a Splash Screen using this java and xml code. I created a separate java class from my main activity and placed the java code inside. I created an xml layout in my layout file and placed the xml code inside. However, my app appears normally without a splash screen. It never shows, but the app does not have any errors. Eclipse is not showing any errors either. What could be the cause to this? Thank you in advance. Here is the code.

Java:

package com.carouseldemo.main;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.view.Menu;

public class Splash extends Activity {

    private final int SPLASH_DISPLAY_LENGHT = 1000;

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle icicle) {
        super.onCreate(icicle);
        setContentView(R.layout.splash);

        /* New Handler to start the Menu-Activity 
         * and close this Splash-Screen after some seconds.*/
        new Handler().postDelayed(new Runnable(){
            @Override
            public void run() {
                /* Create an Intent that will start the Menu-Activity. */
                Intent mainIntent = new Intent(Splash.this,Menu.class);
                Splash.this.startActivity(mainIntent);
                Splash.this.finish();
            }
        }, SPLASH_DISPLAY_LENGHT);
    }
}

XML:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:orientation="vertical" android:layout_width="fill_parent"
        android:layout_height="fill_parent">
        <ImageView android:id="@+id/splashscreen" android:layout_width="wrap_content"
                android:layout_height="fill_parent" android:src="@drawable/cat"
                android:layout_gravity="center"/>
        <TextView android:layout_width="fill_parent"
                android:layout_height="wrap_content" android:text="Hello World, splash"/>
</LinearLayout>

Manifest:

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

    <uses-sdk android:minSdkVersion="8" android:targetSdkVersion="17" android:screenOrientation="portrait"/>
    <application android:icon="@drawable/buttonone" android:label="@string/app_name">

        <activity android:name=".MainActivity" android:label="@string/app_name" android:screenOrientation="portrait" android:configChanges="orientation|keyboardHidden" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

    </application>
</manifest> 

解决方案

MainActivity is launcher activity in manifest file. So, splash is not showing.

Change the launcher activity MainActivity to Splash and write another for MainActivity.

<application android:icon="@drawable/buttonone" android:label="@string/app_name">

        <activity android:name=".Splash" android:label="@string/app_name" android:screenOrientation="portrait" android:configChanges="orientation|keyboardHidden" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity android:name=".MainActivity" />
    </application>

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