导入我的自定义类并调用它的方法？ [英] Importing my custom class and calling it's method?

问题描述

我为我的Android项目创建了一个名为Sounds的自定义类，我想从我的活动中调用它。我的类的内容如下：

  package com.mypackage; 
 
 import java.util.HashMap; 
 
 import android.content.Context; 
 import android.media.SoundPool; 
 
 public class Sounds {
 
 private static boolean sound = true; 
 
 private static final int FLIP_SOUND = 1; 
 
 private static上下文上下文; 
 private static SoundPool soundPool; 
 private static HashMap< Integer，Integer> soundPoolMap; 
 
 public static void initSounds（）{
 soundPoolMap.put（FLIP_SOUND，soundPool.load（context，R.raw.flip，1））; 
} 
 
 public static void playFlip（）{
 soundPool.play（soundPoolMap.get（FLIP_SOUND），1,1,1,0,1）; 
} 
 
 public static void setSound（Boolean onOff）{
 sound = onOff; 
} 
} 
  

在我的主要Activity类中，我尝试导入类，创建它的一个实例，但我想我只是不知道如何做。

解决方案

已编辑：从您的活动 class：

  private Sounds s; 
 
 @Override 
 protected void onCreate（Bundle savedInstanceState）{
 super.onCreate（savedInstanceState）; 
 s = new Sounds（this）; 
 s.initSounds（）; 
} 
  

您还可以将构造函数的上下文发送到自定义类。 p>

删除静态变量和方法：

  public class Sounds {
 
 private boolean sound = true; 
 
 private int FLIP_SOUND = 1; 
 
 private上下文上下文; 
 private SoundPool soundPool; 
 private HashMap soundPoolMap; 
 
 public Sounds（Context context）{
 this.context = context; 
 soundPoolMap = new HashMap（）; 
 soundPool = new SoundPool（0，AudioManager.STREAM_MUSIC，0）; 
} 
 
 public void initSounds（）{
 soundPoolMap.put（FLIP_SOUND，soundPool.load（context，R.raw.flip，1））; 
} 
 
 public void playFlip（）{
 soundPool.play（soundPoolMap.get（FLIP_SOUND），1,1,1,0,1）; 
} 
 
 public void setSound（Boolean onOff）{
 sound = onOff; 
} 
} 
  

I have created a custom class for my Android project called "Sounds" I want to be able to call it from my activity. The contents of my class are as follows:

package com.mypackage;

import java.util.HashMap;

import android.content.Context;
import android.media.SoundPool;

public class Sounds {

private static boolean sound = true;

private static final int FLIP_SOUND = 1;

private static Context context;
private static SoundPool soundPool;
private static HashMap<Integer, Integer> soundPoolMap;

public static void initSounds() {
    soundPoolMap.put(FLIP_SOUND, soundPool.load(context, R.raw.flip, 1));
}

public static void playFlip() {
        soundPool.play(soundPoolMap.get(FLIP_SOUND), 1, 1, 1, 0, 1);
}

public static void setSound(Boolean onOff) {
    sound = onOff;
}
}

In my main Activity class I have tried importing the class, creating an instance of it but I guess I'm just not understanding how it's done. Can anybody point me in the right direction please?

解决方案

Edited: From your Activity class:

private Sounds s;

@Override
protected void onCreate(Bundle savedInstanceState) {
     super.onCreate(savedInstanceState);        
        s = new Sounds(this);
        s.initSounds();
}

You might also send the context with the constructor to your custom class.

Remove the static variables and methods:

public class Sounds {

private boolean sound = true;

private int FLIP_SOUND = 1;

private Context context;
private SoundPool soundPool;
private HashMap soundPoolMap;

public Sounds(Context context){
   this.context = context;
   soundPoolMap = new HashMap();
   soundPool = new SoundPool(0, AudioManager.STREAM_MUSIC, 0);
}

public void initSounds() {
   soundPoolMap.put(FLIP_SOUND, soundPool.load(context, R.raw.flip, 1));
}

public void playFlip() {
    soundPool.play(soundPoolMap.get(FLIP_SOUND), 1, 1, 1, 0, 1);
}

public void setSound(Boolean onOff) {
   sound = onOff;
}
}

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