警告：活动未启动，其当前任务已被带到前面

时间：2012-04-26 14:41:38

标签： java android eclipse

在阅读有关Android游戏开发的书籍时，我在eclipse中遇到了以下警告： ActivityManager: Warning: Activity not started, its current task has been brought to the front

基本上，我有3个项目; Mr.Snake，Mr.Snake.Framework和Mr.Snakey。

在我的Mr.Snake文件中，我有： 

/Mr.Snake/src/com/zardapps/framework/Audio.java
/Mr.Snake/src/com/zardapps/framework/FileIO.java
/Mr.Snake/src/com/zardapps/framework/Game.java
/Mr.Snake/src/com/zardapps/framework/Graphics.java
/Mr.Snake/src/com/zardapps/framework/Input.java
/Mr.Snake/src/com/zardapps/framework/Music.java
/Mr.Snake/src/com/zardapps/framework/MySuperAwesomeGame.java
/Mr.Snake/src/com/zardapps/framework/Pixmap.java
/Mr.Snake/src/com/zardapps/framework/Screen.java
/Mr.Snake/src/com/zardapps/framework/Sound.java

在我的Mr.Snake.Framework中，我有： 

/Mr.Snake.Framework/src/com/zardtechnologies/androidgames/framework/impl/AndroidAudio.java
/Mr.Snake.Framework/src/com/zardtechnologies/androidgames/framework/impl/AndroidFileIO.java
/Mr.Snake.Framework/src/com/zardtechnologies/androidgames/framework/impl/AndroidGame.java
/Mr.Snake.Framework/src/com/zardtechnologies/androidgames/framework/impl/AndroidGraphics.java
/Mr.Snake.Framework/src/com/zardtechnologies/androidgames/framework/impl/AndroidInput.java
/Mr.Snake.Framework/src/com/zardtechnologies/androidgames/framework/impl/AndroidMusic.java
/Mr.Snake.Framework/src/com/zardtechnologies/androidgames/framework/impl/AndroidPixmap.java
/Mr.Snake.Framework/src/com/zardtechnologies/androidgames/framework/impl/AndroidSound.java
/Mr.Snake.Framework/src/com/zardtechnologies/androidgames/framework/impl/KeyboardHandler.java
/Mr.Snake.Framework/src/com/zardtechnologies/androidgames/framework/impl/MultiTouchHandler.java
/Mr.Snake.Framework/src/com/zardtechnologies/androidgames/framework/impl/Pool.java
/Mr.Snake.Framework/src/com/zardtechnologies/androidgames/framework/impl/SingleTouchHandler.java
/Mr.Snake.Framework/src/com/zardtechnologies/androidgames/framework/impl/TouchHandler.java
/Mr.Snake.Framework/src/com/zardtechnologies/androidgames/framework/impl/AndroidFastRenderV have :iew.java

在我的Mr.Snakey，我有： 

/Mr.Snakey/src/com/zardtechnologies/mrsnakey/Assets.java
/Mr.Snakey/src/com/zardtechnologies/mrsnakey/GameScreen.java
/Mr.Snakey/src/com/zardtechnologies/mrsnakey/HighscoreScreen.java
/Mr.Snakey/src/com/zardtechnologies/mrsnakey/LoadingScreen.java
/Mr.Snakey/src/com/zardtechnologies/mrsnakey/MainMenuScreen.java
/Mr.Snakey/src/com/zardtechnologies/mrsnakey/MrSnakey.java
/Mr.Snakey/src/com/zardtechnologies/mrsnakey/Settings.java
/Mr.Snakey/src/com/zardtechnologies/mrsnakey/Snake.java
/Mr.Snakey/src/com/zardtechnologies/mrsnakey/SnakePart.java
/Mr.Snakey/src/com/zardtechnologies/mrsnakey/Stain.java

这是构成我的MrSnakey游戏的三个项目。 目前，我从控制台获得错误 

[2012-04-26 21:56:59 - Mr.Snakey] Android Launch!
[2012-04-26 21:56:59 - Mr.Snakey] adb is running normally.
[2012-04-26 21:56:59 - Mr.Snakey] Performing com.zardtechnologies.mrsnakey.MrSnakey activity launch
[2012-04-26 21:56:59 - Mr.Snakey] Automatic Target Mode: using existing emulator 'emulator-5554' running compatible AVD 'Test.Phone'
[2012-04-26 21:57:02 - Mr.Snakey] Application already deployed. No need to reinstall.
[2012-04-26 21:57:02 - Mr.Snake.Framework] Could not find Mr.Snake.Framework.apk!
[2012-04-26 21:57:02 - Mr.Snake] Could not find Mr.Snake.apk!
[2012-04-26 21:57:02 - Mr.Snakey] Starting activity com.zardtechnologies.mrsnakey.MrSnakey on device emulator-5554
[2012-04-26 21:57:04 - Mr.Snakey] ActivityManager: Starting: Intent { act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] cmp=com.zardtechnologies.mrsnakey/.MrSnakey }
[2012-04-26 21:57:04 - Mr.Snakey] ActivityManager: Warning: Activity not started, its current task has been brought to the front
[2012-04-26 21:58:20 - Mr.Snakey] ------------------------------
[2012-04-26 21:58:20 - Mr.Snakey] Android Launch!
[2012-04-26 21:58:20 - Mr.Snakey] adb is running normally.
[2012-04-26 21:58:20 - Mr.Snakey] Performing com.zardtechnologies.mrsnakey.MrSnakey activity launch
[2012-04-26 21:58:20 - Mr.Snakey] Automatic Target Mode: using existing emulator 'emulator-5554' running compatible AVD 'Test.Phone'
[2012-04-26 21:58:22 - Mr.Snakey] Application already deployed. No need to reinstall.
[2012-04-26 21:58:22 - Mr.Snakey] Project dependency found, installing: Mr.Snake.Framework
[2012-04-26 21:58:22 - Mr.Snake.Framework] Uploading Mr.Snake.Framework.apk onto device 'emulator-5554'
[2012-04-26 21:58:25 - Mr.Snake.Framework] Installing Mr.Snake.Framework.apk...
[2012-04-26 21:58:52 - Mr.Snake.Framework] Success!
[2012-04-26 21:58:52 - Mr.Snake.Framework] Project dependency found, installing: Mr.Snake
[2012-04-26 21:58:52 - Mr.Snake] Uploading Mr.Snake.apk onto device 'emulator-5554'
[2012-04-26 21:58:54 - Mr.Snake] Installing Mr.Snake.apk...
[2012-04-26 21:59:16 - Mr.Snake] Success!
[2012-04-26 21:59:16 - Mr.Snakey] Project dependency found, installing: Mr.Snake
[2012-04-26 21:59:18 - Mr.Snake] Application already deployed. No need to reinstall.
[2012-04-26 21:59:18 - Mr.Snakey] Starting activity com.zardtechnologies.mrsnakey.MrSnakey on device emulator-5554
[2012-04-26 21:59:20 - Mr.Snakey] ActivityManager: Starting: Intent { act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] cmp=com.zardtechnologies.mrsnakey/.MrSnakey }
[2012-04-26 21:59:20 - Mr.Snakey] ActivityManager: Warning: Activity not started, its current task has been brought to the front

我的Mr.Snakey活动文件在这里： 

package com.zardtechnologies.mrsnakey;

import com.zardapps.framework.Screen;
import com.zardtechnologies.androidgames.framework.impl.AndroidGame;

public class MrSnakey extends AndroidGame {

    public Screen getStartScreen() {
        return new LoadingScreen(this);
    }




}

它链接来自AndroidGame的文件，该文件位于框架impl项目中： 

package com.zardtechnologies.androidgames.framework.impl;

import android.app.Activity;
import android.content.Context;
import android.content.res.Configuration;
import android.graphics.Bitmap;
import android.graphics.Bitmap.Config;
import android.os.Bundle;
import android.os.PowerManager;
import android.os.PowerManager.WakeLock;
import android.view.Window;
import android.view.WindowManager;

import com.zardapps.framework.Audio;
import com.zardapps.framework.FileIO;
import com.zardapps.framework.Game;
import com.zardapps.framework.Graphics;
import com.zardapps.framework.Input;
import com.zardapps.framework.Screen;

public abstract class AndroidGame extends Activity implements Game {
    AndroidFastRenderView renderView;
    Graphics graphics;
    Audio audio;
    Input input;
    FileIO fileIO;
    Screen screen;
    WakeLock wakeLock;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        requestWindowFeature(Window.FEATURE_NO_TITLE);
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
                WindowManager.LayoutParams.FLAG_FULLSCREEN);
        boolean isLandscape = getResources().getConfiguration().orientation == Configuration.ORIENTATION_LANDSCAPE;
        int frameBufferWidth = isLandscape ? 480 : 320;
        int frameBufferHeight = isLandscape ? 320 : 480;
        Bitmap frameBuffer = Bitmap.createBitmap(frameBufferWidth,
                frameBufferHeight, Config.RGB_565);

        float scaleX = (float) frameBufferWidth
                / getWindowManager().getDefaultDisplay().getWidth();
        float scaleY = (float) frameBufferHeight
                / getWindowManager().getDefaultDisplay().getHeight();

        renderView = new AndroidFastRenderView(this, frameBuffer);
        graphics = new AndroidGraphics(getAssets(), frameBuffer);
        fileIO = new AndroidFileIO(getAssets());
        audio = new AndroidAudio(this);
        input = new AndroidInput(this, renderView, scaleX, scaleY);
        screen = getStartScreen();
        setContentView(renderView);

        PowerManager powerManager = (PowerManager) getSystemService(Context.POWER_SERVICE);
        wakeLock = powerManager.newWakeLock(PowerManager.FULL_WAKE_LOCK,
                "GLGAME");

    }

    public void onResume() {
        super.onResume();
        wakeLock.acquire();
        screen.resume();
        renderView.resume();
    }

    public void onPause() {
        super.onPause();
        wakeLock.release();
        renderView.pause();
        screen.pause();

        if (isFinishing())
            screen.dispose();
    }

    public Input getInput() {
        return input;
    }

    public FileIO getFileIO() {
        return fileIO;
    }

    public Graphics getGraphics() {
        return graphics;
    }

    public Audio getAudio() {
        return audio;
    }

    public void setScreen(Screen screen) {
        if (screen == null)
            throw new IllegalArgumentException("Screen must not be null");
        this.screen.pause();
        this.screen.dispose();
        screen.resume();
        screen.update(0);
        this.screen = screen;
    }

    public Screen getCurrentScreen() {
        return screen;
    }
}

游戏来自框架项目 

package com.zardapps.framework;
public interface Game {
    public Input getInput();
    public FileIO getFileIO();
    public Graphics getGraphics();
    public Audio getAudio();
    public void setScreen(Screen screen);
    public Screen getCurrentScreen();
    public Screen getStartScreen();
}

我的Mr.Snakey Manifest： 

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

    <application
        android:debuggable="true"
        android:icon="@drawable/ic_launcher"
        android:label="Mr.Snakey" >
        <activity
            android:name=".MrSnakey"
            android:configChanges="keyboard|keyboardHidden|orientation"
            android:label="Mr.Snakey"
            android:screenOrientation="portrait" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

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

    <uses-sdk
        android:minSdkVersion="3"
        android:targetSdkVersion="12" />

</manifest>

基本上，我找不到错误的根源; ActivityManager：警告：活动未启动，其当前任务已被带到前面我目前正在使用eclipse中的模拟器。我试图重建我的项目，重新安装并清理它，但对我来说没有任何作用。我很感谢你们花时间阅读我写过的这么长篇文章。

3 个答案:

答案 0 :(得分：3)

发生这种情况是因为新的APK文件没有变化，所以尝试清理代码或重新编译它再重新运行之前就会消失。

如果您尝试在第二次运行此游戏，Android操作系统将检查APK文件是否有当前更改的文件。并且由于游戏已经启动，操作系统不会重新打开应用程序。他将继续已经开放的那个。

最快的解决方案是按下电子剪辑上的项目名称，然后选择清理或重建您的应用程序。

答案 1 :(得分：0)

这不是错误，甚至是编译器警告，表明您做错了什么。我知道它说“警告”，但它更像是一个FYI。正如在“FYI中，您运行相同的代码而不进行更改，并且该应用程序已在运行，因此Android将向您显示正在运行的应用程序，而不是安装相同的内容并重新启动它。”

答案 2 :(得分：0)

当我复制同一个项目时，我遇到了同样的错误。最初我运行了重复的项目，其中微小的更改它成功执行并在以后当我尝试运行原始项目时显示在模拟器上我收到此错误“警告：活动未启动，其当前任务已被带到前面”所以我卸载了通过“管理应用程序”从模拟器复制应用程序然后我运行它成功运行的原始项目。希望它可以帮助你

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