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ACTION_DOWN,ACTION_UP和onClick事件

[英]ACTION_DOWN, ACTION_UP and onClick event

我有一個listview,其項目是由2個標簽和一個相對布局中的按鈕組成的自定義視圖。

執行此操作時,單擊列表視圖按鈕的“反饋”-該項目在您觸摸時更改了背景色-消失了,所以我決定使用ACTION_DOWN和ACTION_UP

我做了這個課程來放入所有具有相同問題的列表視圖:

// The same instance of this class is setted as onTouchListener to the labels and the layout
public class OnTouchChangeColor implements OnTouchListener {

TransitionDrawable transition;
private final int duration = 250;
public static final int INITCOLOR = Color.WHITE;
public static final int FINALCOLOR = Color.CYAN;
// this will be the layout container of the labels and the button
ViewGroup layout = null;
public OnTouchChangeColor(ViewGroup layout){
    update(layout);
}

public void update(ViewGroup layout){
    this.layout = layout;
    TransitionDrawable t = new TransitionDrawable(new Drawable[]{new ColorDrawable(INITCOLOR), new ColorDrawable(FINALCOLOR)});
    layout.setBackgroundDrawable(t);
    transition = (TransitionDrawable) layout.getBackground();
}
@Override
public boolean onTouch(View v, MotionEvent event) {
    int eventaction = event.getAction();
    switch (eventaction) {
        case MotionEvent.ACTION_DOWN: 
        transition.startTransition(duration);
        break;
        case MotionEvent.ACTION_UP:   
        transition.reverseTransition(duration);
        break;
    }
    // tell the system that we handled the event but a further processing is required
    return false;
}

問題在於,該項目獲得了觸摸事件ACTION_DOWN但沒有獲得ACTION_UP,那就是:背景在250毫秒內從白色變為青色,此后將產生onclick事件,但不會執行ACTION_UP ...

onClick會執行以下操作:

@Override
public void onClick(View v) {
    try {
        loadData();
    } catch (IOException e) {
        e.printStackTrace();
    }
    Intent intent = new Intent(context, ActDestiny.class);
    intent.putExtra("stop", true);
    context.startActivity(intent);
}

好吧:它進入下一個活動,但它不會使背景變回白色...不僅如此:有時它並沒有達到預定的目的,但是背景變成了青色,並停留在青色中...

我已經閱讀了Android文檔,該文檔在ontouch函數中返回“ false”:

因此,如果在收到按下動作事件時返回false,則表明您尚未消耗該事件,並且也對該事件的后續動作不感興趣。 因此, 不會在事件內要求您進行任何其他操作,例如手指手勢或最終的上動作事件。

因此,如果我返回true,則反饋有效,但事件已消耗且onclick不起作用...

所以我不知道該怎么做才能使觸摸項目的“反饋”和onclick事件正常工作。

我可以在ACTION_UP內調用onClick,但是它非常難看-特別是在“ onLongClick”事件中的思考-。

是否可以使用ACTION_DOWN,ACTION_UP制作動畫以及使用onClick事件立即制作應用邏輯?

如何恢復並匯總“按下按鈕”的反饋?

編輯郵編:

好吧,這里有要求的代碼。

xml:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/layout_titular_mp3"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="horizontal">

<TextView
    android:id="@+id/LblTitulo"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:layout_toLeftOf="@id/btnAccion"
    android:textSize="20dp"
    android:textStyle="bold" />

<TextView
    android:id="@+id/LblSubTitulo"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:layout_below="@id/LblTitulo"
    android:layout_toLeftOf="@id/btnAccion"
    android:text=" "
    android:textSize="12dp"
    android:textStyle="normal" />

<Button
    android:id="@+id/btnAccion"
    android:layout_width="48dp"
    android:layout_height="wrap_content"
    android:layout_alignParentRight="true"
    android:background="@drawable/playbutton_style"
    android:gravity="center_vertical|center_horizontal|right"
    android:visibility="gone" />

</RelativeLayout>

以及適配器的代碼。 請注意,當我這樣做時:

cvh.updateCustomOnClickBases(titActual, context,posicion);
cvh.updateOnTouchListeners();    

我這樣做是因為listView僅創建屏幕上的視圖,當您向下滾動它時,記錄下來的(上面的)記錄了數據數組中下一項的信息(將顯示在屏幕上,作為下一個)。

因此,我記錄了事件偵聽器也更新了它們的引用。 代碼如下。

public class AdaptPlayList extends BaseAdapter {
private final Context context;
ArrayList<PlayList> datos;
long id;

public AdaptPlayList(Context context, ArrayList<PlayList> datos, int typ) {
    this.datos = datos;
    this.context = context;
}

public void updatePlaylist(ArrayList<PlayList> pl){
    ThreadPreconditions.checkOnMainThread();
    this.datos = pl;
    notifyDataSetChanged();
}

@Override
public int getCount(){
     return datos.size();
}

@Override
public PlayList getItem(int index) {
    return datos.get(index);
}

@Override
public long getItemId(int index) {
    return index;
}


public View getView(int posicion, View convertView, ViewGroup parent) {
    final PlayList titActual = getItem(posicion); 
    CancionViewHolder cvh;
    if (convertView == null) {
        cvh = new CancionViewHolder();
        convertView = LayoutInflater.from(context).inflate(R.layout.titularmp3, parent, false);
        OnPlaylistItemClick itemClick = new OnPlaylistItemClick(titActual, context,posicion);
        cvh.titulo = (TextView) convertView.findViewById(R.id.LblTitulo);
        cvh.btnAction = (Button) convertView.findViewById(R.id.btnAccion);
        cvh.layout = (ViewGroup)convertView.findViewById(R.id.layout_titular_mp3);
        cvh.click = itemClick;
        cvh.longClick = itemClick;
        cvh.btnClick = new OnPlaylistButtonClick(titActual, context,posicion);
        convertView.setTag(cvh);
    }else{
        cvh = (CancionViewHolder)convertView.getTag();
    }
    cvh.updateCustomOnClickBases(titActual, context,posicion);
    cvh.updateOnTouchListeners();
    TextView titulo = cvh.titulo;
    Button btnAction = cvh.btnAction;
    titulo.setText(titActual.getDesc());
    btnAction.setVisibility(View.VISIBLE);
    btnAction.setOnClickListener(cvh.btnClick);
    titulo.setOnClickListener(cvh.click);
    titulo.setOnLongClickListener(cvh.longClick);
    return convertView;

}
}

class OnPlaylistItemClick  extends CustomOnClickBase implements OnClickListener, OnLongClickListener{

public OnPlaylistItemClick(PlayList pl, Context ctx, int position) {
    super(pl, ctx, position);
}

@Override
public boolean onLongClick(View v) {
    // do things....
            //
    Intent intent = new Intent(context, ActListadoCancionesAsync.class);
    intent.putExtra("stopMusic", true);
    context.startActivity(intent);
    return true;
}

@Override
public void onClick(View v) {
    // do more things!
    }
}

}

class OnPlaylistButtonClick  extends CustomOnClickBase implements OnClickListener{
PlayList titActual;

public OnPlaylistButtonClick(PlayList pl, Context ctx, int position) {
    super(pl, ctx, position);
    titActual = pl;
}

@Override
public void onClick(View v) {
    // do things
            //....
    Intent intent = new Intent(context, ActListadoCancionesAsync.class);
    intent.putExtra("stopMusic", true);
    context.startActivity(intent);
}
}

有了這個持有人和clickbase,我避免了對象的創建(我創建了一個被更新的listview項的事件監聽器,而不是創建新的監聽器)

public class CancionViewHolder{
    public TextView titulo;
    public TextView subtitulo;
    public ToggleButton button;
    public Button btnAction;
    public OnClickListener btnClick;
    public OnClickListener click;
    public OnLongClickListener longClick;
    public ViewGroup layout = null;

    /**Actualiza los eventos que estan cacheados para que apunten a sus nuevos contenidos del adapter. De otro modo, como los
     * datos del adapter se moveran mientras que los views seran reutilizados los eventos apuntarian a la anterior posicion
     * @param datosItem
     * @param ctx
     * @param pos
     */
    public void updateCustomOnClickBases(Object datosItem, Context ctx, int pos){
        ((CustomOnClickBase)click).updateObject(datosItem, ctx,pos, layout);
        ((CustomOnClickBase)longClick).updateObject(datosItem, ctx,pos, layout);
        ((CustomOnClickBase)btnClick).updateObject(datosItem, ctx,pos, layout);
    }

    /**
     * Establece los listeners que hacen efectos cuando se pulsa algo
     */
    public void updateOnTouchListeners() {
        if (layout != null) {
            OnTouchChangeColor cc = new OnTouchChangeColor(layout);
            layout.setOnTouchListener(cc);
            if (subtitulo != null){
                subtitulo.setOnTouchListener(cc);
            }
            if (titulo != null){
                titulo.setOnTouchListener(cc);
            }
        }
    }
}

public abstract class CustomOnClickBase {
protected Object datosItem;
protected Context context;
protected int position;
protected ViewGroup layout;

public CustomOnClickBase(Object datosItem, Context ctx, int position){
    updateObject(datosItem, ctx, position, layout);
}

public void updateObject(Object datosItem, Context ctx, int position, ViewGroup layout){
    this.datosItem = datosItem;
    context =ctx;
    this.position = position;
    this.layout = layout;
}
}

我認為您需要更改onTouch()方法

@Override
public boolean onTouch(View v, MotionEvent event) {
    int eventaction = event.getAction();
    switch (eventaction) {
        case MotionEvent.ACTION_DOWN: 
        transition.startTransition(duration);
        //Tell Android that you can handle this MotionEvent, and you 
        //want to keep informed of further events of this touch
        return true;
        break;
        case MotionEvent.ACTION_UP:   
        transition.reverseTransition(duration);
        break;
    }
    // tell the system that we handled the event but a further processing is required
    return false;
}

希望能幫助到你。

public boolean onTouch(MotionEvent ev) {
 ...
 return super.onTouch(ev);
}

也許您不應該自己返回false。

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