Question

就像标题状态一样，当我通过UI设置一个开关来播放my_sound1时，一切都会按预期工作，但是如果首先单击my_sound2的开关，就好像buttonId被交换为两者。

我已经一遍又一遍了，似乎找不到其他人遇到相同问题的实例。起初我以为这是声音池中的错误，但是现在我可以确定它在OnCheckedChangeListener代码中。

如果我先播放“板球”，则该应用会按照我想要的方式运行。但是，如果我先播放“青蛙”，它会使程序像交换ID的开关一样起作用。我已经在android 4.1.2、5.1.1、7.1.1中对其进行了测试，并且这三个方面都发生了。

我没有正确设置交换机吗？这是Android中的错误吗？

MainActivity.java：

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.media.SoundPool.OnLoadCompleteListener;
import android.media.SoundPool;
import android.media.AudioManager;
import android.widget.CompoundButton;
import android.widget.Switch;


public class MainActivity extends AppCompatActivity {

private SoundPool soundPool;
private int my_sound1;
private int my_sound2;

boolean plays1 = false, plays2 = false, loaded_crickets = false, loaded_frogs = false;
float actVolume, maxVolume, volume;
AudioManager audioManager;

private Switch crickets_switch;
private Switch frogs_switch;

@Override
public void onCreate(Bundle savedInstanceState) {


    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);


    // AudioManager audio settings for adjusting the volume
    audioManager = (AudioManager) getSystemService(AUDIO_SERVICE);
    actVolume = (float) audioManager.getStreamVolume(AudioManager.STREAM_MUSIC);
    maxVolume = (float) audioManager.getStreamMaxVolume(AudioManager.STREAM_MUSIC);
    volume = actVolume / maxVolume;

    //Hardware buttons setting to adjust the media sound
    this.setVolumeControlStream(AudioManager.STREAM_MUSIC);

    if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.LOLLIPOP) {
        soundPool = (new SoundPool.Builder()).setMaxStreams(2).build();
    }else{
        soundPool = new SoundPool(2, AudioManager.STREAM_MUSIC, 0);
    }

    my_sound1 = soundPool.load(this, R.raw.crickets, 1);
    my_sound2 = soundPool.load(this, R.raw.frogs, 2);

    soundPool.setOnLoadCompleteListener(new OnLoadCompleteListener() {
        public void onLoadComplete(SoundPool soundPool, int sampleId,int status) {
            if (sampleId == my_sound1) { loaded_crickets = true; }
            if (sampleId == my_sound2) { loaded_frogs = true; }
        }
    });

    crickets_switch = findViewById(R.id.switch1);
    frogs_switch = findViewById(R.id.switch2);

    crickets_switch.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(CompoundButton crickets_switch, boolean isCheckedCrickets) {
            if (isCheckedCrickets) {
                if (loaded_crickets && !plays1) {
                    soundPool.play(my_sound1, volume, volume, 1, -1, 1f);
                    plays1 = true;
                } else {
                    soundPool.resume(my_sound1);
                }
            }
            if (!isCheckedCrickets && plays1 == true) {
                soundPool.pause(my_sound1);
            }
        }
    });

    frogs_switch.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(CompoundButton frogs_switch, boolean isCheckedFrogs) {
            if (isCheckedFrogs) {
                if (loaded_frogs && !plays2) {
                    soundPool.play(my_sound2, volume, volume, 2, -1, 1f);
                    plays2 = true;
                } else {
                    soundPool.resume(my_sound2);
                }
            }
            if (!isCheckedFrogs && plays2 == true) {
                soundPool.pause(my_sound2);
            }
        }
    });


}
}

activity_main.xml：

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">

<Switch
    android:id="@+id/switch1"
    android:layout_width="173dp"
    android:layout_height="wrap_content"
    android:layout_marginStart="8dp"
    android:layout_marginLeft="8dp"
    android:layout_marginTop="8dp"
    android:layout_marginEnd="8dp"
    android:layout_marginRight="8dp"
    android:layout_marginBottom="8dp"
    android:text="@string/crickets"
    app:layout_constraintBottom_toTopOf="@+id/switch2"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent" />

<Switch
    android:id="@+id/switch2"
    android:layout_width="176dp"
    android:layout_height="wrap_content"
    android:layout_marginStart="8dp"
    android:layout_marginLeft="8dp"
    android:layout_marginTop="8dp"
    android:layout_marginEnd="8dp"
    android:layout_marginRight="8dp"
    android:layout_marginBottom="8dp"
    android:text="@string/frogs"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintHorizontal_bias="0.506"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent" />
</android.support.constraint.ConstraintLayout>

当按特定顺序设置为true时，为什么Android的CompoundButton.setOnLoadCompleteListener交换按钮ID

0 个答案: