[英]onTouch with Multitouch and SoundPool Motion Events
所以我正在為Android開發木琴應用程序,但遇到了問題,我不確定如何正確使用onTouch。 現在,我可以按一個圖像並播放聲音,但是不能同時播放兩個聲音,也不能將手指滑到木琴上並播放所有聲音,它只會播放所按的第一個圖像。 我知道這是由於onTouch和Multitouch引起的,但是我不確定該怎么做,而且我找不到任何相關的示例代碼,我們將為您提供任何幫助!
這是我的主要活動
public class Xylophone extends Activity {
private Player mSoundManager;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_xylophone);
mSoundManager = new Player();
mSoundManager.initSounds(getBaseContext());
mSoundManager.addSound(1, R.raw.note01);
mSoundManager.addSound(2, R.raw.note02);
mSoundManager.addSound(3, R.raw.note03);
mSoundManager.addSound(4, R.raw.note04);
mSoundManager.addSound(5, R.raw.note05);
mSoundManager.addSound(6, R.raw.note06);
mSoundManager.addSound(7, R.raw.note07);
mSoundManager.addSound(8, R.raw.note08);
ImageView img01 = (ImageView) findViewById(R.id.imageView1);
img01.setOnTouchListener(new OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
mSoundManager.playSound(1);
return false;
}
});
ImageView img02 = (ImageView) findViewById(R.id.imageView2);
img02.setOnTouchListener(new OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
mSoundManager.playSound(2);
return false;
}
});
這是我的SoundPool活動
public class Player {
private SoundPool mSoundPool;
private HashMap<Integer, Integer> mSoundPoolMap;
private AudioManager mAudioManager;
private Context mContext;
public Player()
{
}
public void initSounds(Context theContext) {
mContext = theContext;
mSoundPool = new SoundPool(8, AudioManager.STREAM_MUSIC, 0);
mSoundPoolMap = new HashMap<Integer, Integer>();
mAudioManager = (AudioManager)mContext.getSystemService(Context.AUDIO_SERVICE);
}
public void addSound(int Index,int SoundID)
{
mSoundPoolMap.put(Index, mSoundPool.load(mContext, SoundID, 1));
}
public void playSound(int index) {
int streamVolume = mAudioManager.getStreamVolume(AudioManager.STREAM_MUSIC);
mSoundPool.play(mSoundPoolMap.get(index), streamVolume, streamVolume, 1, 0, 1f);
}
public void playLoopedSound(int index) {
int streamVolume = mAudioManager.getStreamVolume(AudioManager.STREAM_MUSIC);
mSoundPool.play(mSoundPoolMap.get(index), streamVolume, streamVolume, 1, -1, 1f);
}
}
這是我的布局
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_centerVertical="true"
android:orientation="horizontal" >
<ImageView
android:id="@+id/imageView1"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:adjustViewBounds="true"
android:cropToPadding="false"
android:scaleType="fitXY"
android:src="@drawable/button01" />
<ImageView
android:id="@+id/imageView2"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:scaleType="fitXY"
android:src="@drawable/button02" />
希望您知道到現在為止。 仍然是我對此的看法:首先,您的第二堂課SoundPool 不是一項活動。
您必須嘗試的是不覆蓋每個按鈕的onTouch方法。
相反,在您的主要活動中,使其實現OnTouchListener。
然后,當然,您需要實現/覆蓋OnTouchListener的方法。 因此,現在,如果您將主視圖和/或每個按鈕( 查看自己的工作原理! )注冊到OnTouchListener,您將獲得所有觸摸(以及多點觸摸)。
看一下MotionEvent類以獲得更多詳細信息
public class Xylophone extends Activity implements onTouchLister{
public static final String TAG = "Xylophone";
@Override
public void onCreate(Bundle savedInstanceState) {
/*Either have your parent view register THIS (Xylophone) as its listener, or have each button register THIS(Xylophone) as its listener.*/
yourParentView.setOnTouchListener(this);
//or
img02.setOnTouchListener(this);
}
@Override
public boolean onTouch(View v, MotionEvent event) {
Log.i(TAG, "ID:" + Integer.toString(v.getId()));
Log.i(TAG, "Pointer count: " + event.getPointerCount());
Log.i(TAG, "Action: " + event.getActionMasked());
Log.i(TAG, "Action index: " + event.getActionIndex());
}
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