遇到问题,我闪屏 [英] Having Trouble with my Splash Screen

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问题描述

所以,我刚开始建立一个闪屏,将显示5秒钟,然后进入我的主菜单。我想我标记一些错误的过程中,现在我的应用程序是力闭幕。我是pretty的肯定与我的行为和我的表现的一个问题。

DragonFruitActivity.java:

 包com.Dragon_Fruit;

进口android.app.Activity;
进口android.content.Intent;
进口android.media.MediaPlayer;
进口android.os.Bundle;
进口android.view.View;
进口android.view.Window;
进口android.view.WindowManager;
进口android.widget.ImageButton;

公共类DragonFruitActivity延伸活动{
    / **第一次创建活动时调用。 * /
    @覆盖
    公共无效的onCreate(包savedInstanceState){
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        getWindow()。setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
                WindowManager.LayoutParams.FLAG_FULLSCREEN);
        super.onCreate(savedInstanceState);
        的setContentView(R.layout.splash);
        螺纹logoTimer =新的Thread(){
            公共无效的run(){
                尝试 {
                    睡眠(5000);
                    DragonFruitActivity.this.setContentView(R.layout.main);

                }赶上(InterruptedException异常E){
                    // TODO自动生成的catch块
                    e.printStackTrace();
                }

                最后 {
                    完();
                }
            }
        };
        logoTimer.start();

        // ***按键声音*** //
        最后的MediaPlayer buttonSound = MediaPlayer.create(
                DragonFruitActivity.this,R.raw.button_click);

        的ImageButton PLAYBUTTON =(的ImageButton)findViewById(R.id.playbutton);
        playbutton.setOnClickListener(新View.OnClickListener(){

            @覆盖
            公共无效的onClick(查看为arg0){
                arg0.setBackgroundResource(R.drawable.playbuttonselected);
                // TODO自动生成方法存根
                buttonSound.start();
                startActivity(新意图(DragonFruitActivity.this,
                        playbutton.class));
            }

        });
        的ImageButton settingsbutton =(的ImageButton)findViewById(R.id.settingsbutton);
        settingsbutton.setOnClickListener(新View.OnClickListener(){

            @覆盖
            公共无效的onClick(查看为arg0){
                // TODO自动生成方法存根
                buttonSound.start();
                startActivity(新意图(DragonFruitActivity.this,
                        settingsbutton.class));
            }

        });
    }
}
 

火龙果清单:

 < XML版本=1.0编码=UTF-8&GT?;
<舱单的xmlns:机器人=htt​​p://schemas.android.com/apk/res/android
    包=com.Dragon_Fruit
    安卓版code =1
    机器人:VERSIONNAME =1.0
    机器人:INSTALLLOCATION =preferExternal>


    <应用机器人:图标=@可绘制/图标
                 机器人:标签=@字符串/ APP_NAME
                 机器人:可调试=真正的>

        <活动机器人:名称=。DragonFruitActivity
                  机器人:标签=@字符串/ APP_NAME
                  机器人:screenOrientation =风景
                  机器人:configChanges =键盘| keyboardHidden |定位>
            <意向滤光器>
                <作用机器人:名称=android.intent.action.MAIN/>
                <类机器人:名称=android.intent.category.LAUNCHER/>
            &所述; /意图滤光器>
        < /活性GT;

        <活动机器人:PLAYBUTTONNAME =
                  机器人:标签=@字符串/ APP_NAME
                  机器人:screenOrientation =风景
                  机器人:configChanges =键盘| keyboardHidden |定位>
            <意向滤光器>
                <作用机器人:名称=com.Dragon_Fruit.PLAYBUTTON/>
                <类机器人:名称=android.intent.category.DEFAULT/>
            &所述; /意图滤光器>
        < /活性GT;

        <活动机器人:settingsbuttonNAME =
                  机器人:标签=@字符串/ APP_NAME
                  机器人:screenOrientation =风景
                  机器人:configChanges =键盘| keyboardHidden |定位>
            <意向滤光器>
                <作用机器人:名称=com.Dragon_Fruit.SETTINGSBUTTON/>
                <类机器人:名称=android.intent.category.DEFAULT/>
            &所述; /意图滤光器>
        < /活性GT;

    < /用途>
    <使用-权限的Andr​​oid:名称=android.permission.WRITE_EXTERNAL_STORAG​​E/>
    <使用-权限的Andr​​oid:名称=android.permission.WAKE_LOCK/>
    <使用-SDK安卓的minSdkVersion =3安卓targetSdkVersion =9/>
< /舱单>
 

LogCat中:

  08-06 22:46:27.942:ERROR / dalvikvm(9896):不能禁用核心文件生成的PID 9896,错误号= 1
08-06 22:46:28.271:ERROR /(5531):此文件不是ASF文件。
08-06 22:46:28.364:ERROR / AndroidRuntime(9896):致命异常:主要
08-06 22:46:28.364:ERROR / AndroidRuntime(9896):java.lang.RuntimeException的:无法启动的活动ComponentInfo {com.Dragon_Fruit / com.Dragon_Fruit.DragonFruitActivity}:显示java.lang.NullPointerException
08-06 22:46:28.364:ERROR / AndroidRuntime(9896):在android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2737)
08-06 22:46:28.364:ERROR / AndroidRuntime(9896):在android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2753)
08-06 22:46:28.364:ERROR / AndroidRuntime(9896):在android.app.ActivityThread.access $ 2500(ActivityThread.java:129)
08-06 22:46:28.364:ERROR / AndroidRuntime(9896):在android.app.ActivityThread $ H.handleMessage(ActivityThread.java:2107)
08-06 22:46:28.364:ERROR / AndroidRuntime(9896):在android.os.Handler.dispatchMessage(Handler.java:99)
08-06 22:46:28.364:ERROR / AndroidRuntime(9896):在android.os.Looper.loop(Looper.java:143)
08-06 22:46:28.364:ERROR / AndroidRuntime(9896):在android.app.ActivityThread.main(ActivityThread.java:4701)
08-06 22:46:28.364:ERROR / AndroidRuntime(9896):在java.lang.reflect.Method.invokeNative(本机方法)
08-06 22:46:28.364:ERROR / AndroidRuntime(9896):在java.lang.reflect.Method.invoke(Method.java:521)
08-06 22:46:28.364:ERROR / AndroidRuntime(9896):在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run(ZygoteInit.java:868)
08-06 22:46:28.364:ERROR / AndroidRuntime(9896):在com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
08-06 22:46:28.364:ERROR / AndroidRuntime(9896):在dalvik.system.NativeStart.main(本机方法)
08-06 22:46:28.364:ERROR / AndroidRuntime(9896):由:显示java.lang.NullPointerException
08-06 22:46:28.364:ERROR / AndroidRuntime(9896):在com.Dragon_Fruit.DragonFruitActivity.onCreate(DragonFruitActivity.java:44)
08-06 22:46:28.364:ERROR / AndroidRuntime(9896):在android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
08-06 22:46:28.364:ERROR / AndroidRuntime(9896):在android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2701)
08-06 22:46:28.364:ERROR / AndroidRuntime(9896):11 ...更多
 

解决方案

在你的线程,尝试改变:

 意图DragonFruitActivityIntent =新的意向书(主);
 

 意图DragonFruitActivityIntent =新的意图(DragonFruitActivity.this,NameOfActivityToStart.class);
 

另外,如果你想改变布局,而不是开始一个新的活动,删除:

 意图DragonFruitActivityIntent =新的意向书(主);
startActivity(DragonFruitActivityIntent);
 

,而是写:

  DragonFruitActivity.this.setContentView(R.layout.main);
 

顺便说一句,这将是更好,如果,而不是睡5秒,该线程做一些有用的东西,比如加载一些数据,为您的应用程序 - 否则它只是放慢访问你的应用程序没有任何理由

编辑:尝试从的onCreate()来ONSTART()将所有的code,所以它是这样的:

  @覆盖
公共无效的onCreate(包savedInstanceState){
   super.onCreate(savedInstanceState);
   requestWindowFeature(Window.FEATURE_NO_TITLE);
   getWindow()。setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
      WindowManager.LayoutParams.FLAG_FULLSCREEN);
   的setContentView(R.layout.splash);
}

@覆盖
公共无效的OnStart(){
   super.onStart()
   螺纹logoTimer =新的Thread(){
   ... //你的code,其余在这里
}
 

您可能会遇到访问UI问题它完全形成之前。

So I just started to set up a splash screen that would show for 5 seconds and then go to my main menu. I think I labeled something wrong in the process and now my app is force closing. I'm pretty sure its a problem with my activity and my manifest.

DragonFruitActivity.java:

 package com.Dragon_Fruit;

import android.app.Activity;
import android.content.Intent;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;
import android.widget.ImageButton;

public class DragonFruitActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
                WindowManager.LayoutParams.FLAG_FULLSCREEN);
        super.onCreate(savedInstanceState);
        setContentView(R.layout.splash);
        Thread logoTimer = new Thread() {
            public void run() {
                try {
                    sleep(5000);
                    DragonFruitActivity.this.setContentView(R.layout.main);

                } catch (InterruptedException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }

                finally {
                    finish();
                }
            }
        };
        logoTimer.start();

        // ***BUTTON SOUND***//
        final MediaPlayer buttonSound = MediaPlayer.create(
                DragonFruitActivity.this, R.raw.button_click);

        ImageButton playbutton = (ImageButton) findViewById(R.id.playbutton);
        playbutton.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View arg0) {
                arg0.setBackgroundResource(R.drawable.playbuttonselected);
                // TODO Auto-generated method stub
                buttonSound.start();
                startActivity(new Intent(DragonFruitActivity.this,
                        playbutton.class));
            }

        });
        ImageButton settingsbutton = (ImageButton) findViewById(R.id.settingsbutton);
        settingsbutton.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View arg0) {
                // TODO Auto-generated method stub
                buttonSound.start();
                startActivity(new Intent(DragonFruitActivity.this,
                        settingsbutton.class));
            }

        });
    }
}

Dragon Fruit Manifest:

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


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

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

        <activity android:name=".playbutton" 
                  android:label="@string/app_name"
                  android:screenOrientation="landscape" 
                  android:configChanges="keyboard|keyboardHidden|orientation">
            <intent-filter>
                <action android:name="com.Dragon_Fruit.PLAYBUTTON" />
                <category android:name="android.intent.category.DEFAULT" />
            </intent-filter>
        </activity>

        <activity android:name=".settingsbutton" 
                  android:label="@string/app_name"
                  android:screenOrientation="landscape" 
                  android:configChanges="keyboard|keyboardHidden|orientation">
            <intent-filter>
                <action android:name="com.Dragon_Fruit.SETTINGSBUTTON" />
                <category android:name="android.intent.category.DEFAULT" />
            </intent-filter>
        </activity>

    </application>
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.WAKE_LOCK" />
    <uses-sdk android:minSdkVersion="3" android:targetSdkVersion="9" />
</manifest>

LogCat:

08-06 22:46:27.942: ERROR/dalvikvm(9896): could not disable core file generation for pid 9896, errno=1
08-06 22:46:28.271: ERROR/(5531): This file is not ASF file.
08-06 22:46:28.364: ERROR/AndroidRuntime(9896): FATAL EXCEPTION: main
08-06 22:46:28.364: ERROR/AndroidRuntime(9896): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.Dragon_Fruit/com.Dragon_Fruit.DragonFruitActivity}: java.lang.NullPointerException
08-06 22:46:28.364: ERROR/AndroidRuntime(9896):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2737)
08-06 22:46:28.364: ERROR/AndroidRuntime(9896):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2753)
08-06 22:46:28.364: ERROR/AndroidRuntime(9896):     at android.app.ActivityThread.access$2500(ActivityThread.java:129)
08-06 22:46:28.364: ERROR/AndroidRuntime(9896):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2107)
08-06 22:46:28.364: ERROR/AndroidRuntime(9896):     at android.os.Handler.dispatchMessage(Handler.java:99)
08-06 22:46:28.364: ERROR/AndroidRuntime(9896):     at android.os.Looper.loop(Looper.java:143)
08-06 22:46:28.364: ERROR/AndroidRuntime(9896):     at android.app.ActivityThread.main(ActivityThread.java:4701)
08-06 22:46:28.364: ERROR/AndroidRuntime(9896):     at java.lang.reflect.Method.invokeNative(Native Method)
08-06 22:46:28.364: ERROR/AndroidRuntime(9896):     at java.lang.reflect.Method.invoke(Method.java:521)
08-06 22:46:28.364: ERROR/AndroidRuntime(9896):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
08-06 22:46:28.364: ERROR/AndroidRuntime(9896):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
08-06 22:46:28.364: ERROR/AndroidRuntime(9896):     at dalvik.system.NativeStart.main(Native Method)
08-06 22:46:28.364: ERROR/AndroidRuntime(9896): Caused by: java.lang.NullPointerException
08-06 22:46:28.364: ERROR/AndroidRuntime(9896):     at com.Dragon_Fruit.DragonFruitActivity.onCreate(DragonFruitActivity.java:44)
08-06 22:46:28.364: ERROR/AndroidRuntime(9896):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
08-06 22:46:28.364: ERROR/AndroidRuntime(9896):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2701)
08-06 22:46:28.364: ERROR/AndroidRuntime(9896):     ... 11 more

解决方案

In your thread, try changing:

 Intent DragonFruitActivityIntent = new Intent("main");

to:

 Intent DragonFruitActivityIntent = new Intent(DragonFruitActivity.this, NameOfActivityToStart.class);

Alternatively, if you want to change the layout rather than starting a new activity, remove:

Intent DragonFruitActivityIntent = new Intent("main");
startActivity(DragonFruitActivityIntent);

and instead write:

DragonFruitActivity.this.setContentView(R.layout.main);

Incidentally, it would be better if rather than sleeping for 5 seconds, the thread did something useful like load some data for your app - otherwise it's just slowing down access to your app for no reason.

Edit: Try moving all your code from onCreate() to onStart(), so it's like this:

@Override
public void onCreate(Bundle savedInstanceState) {
   super.onCreate(savedInstanceState);
   requestWindowFeature(Window.FEATURE_NO_TITLE);
   getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
      WindowManager.LayoutParams.FLAG_FULLSCREEN);        
   setContentView(R.layout.splash);
}

@Override
public void onStart() {
   super.onStart()
   Thread logoTimer = new Thread() {
   ... // the rest of your code here
}

You may be experiencing problems accessing the UI before it's fully formed.

这篇关于遇到问题,我闪屏的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!

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