Android的初学者：android的gridview的触摸事件 [英] Android beginner: Touch events in android gridview
问题描述
我使用下面的code做的GridView的事情（从的 http://developer.android.com/resources/tutorials/views/hello-gridview.html ）。我想更换onClicklistener和的onClick（）方法，用他们的亲密接触等同，即touchlistener和onTouch（），所以，当我抚摸的元素变化的元素在GridView的形象和在相同的元素双触摸需要它回到原单的状态。
我如何做到这一点？我不能让我的code做到这一点。所述clicklistener工作在一定程度上，但在触摸不是。请大家帮帮忙。
公共类ImageAdapter扩展了BaseAdapter {
私人语境mContext;
公共ImageAdapter（上下文C）{
mContext = C;
}
公众诠释getCount将（）{
返回mThumbIds.length;
}
公共对象的getItem（INT位置）{
返回null;
}
众长getItemId（INT位置）{
返回0;
}
//创建由适配器引用的每个项目的新的ImageView
公共查看getView（INT位置，查看convertView，ViewGroup中父）{
ImageView的ImageView的;
如果（convertView == NULL）{//如果它不回收，初始化一些属性
ImageView的=新ImageView的（mContext）;
imageView.setLayoutParams（新GridView.LayoutParams（85，85））;
imageView.setScaleType（ImageView.ScaleType.CENTER_CROP）;
imageView.setPadding（8,8，8,8）;
imageView.setOnClickListener（新View.OnClickListener（）
{
@覆盖
公共无效的onClick（视图查看）
{
如果（位置== 0）
{
//做这个
}
其他
{
//做这个
}
}
}）;
} 其他 {
ImageView的=（ImageView的）convertView;
}
imageView.setImageResource（mThumbIds [位置]）;
返回ImageView的;
}
//引用到我们的形象
私人整数[] mThumbIds = {
R.drawable.sample_2，R.drawable.sample_3，
R.drawable.sample_4，R.drawable.sample_5，
R.drawable.sample_6，R.drawable.sample_7，
R.drawable.sample_0，R.drawable.sample_1，
R.drawable.sample_2，R.drawable.sample_3，
R.drawable.sample_4，R.drawable.sample_5，
R.drawable.sample_6，R.drawable.sample_7，
R.drawable.sample_0，R.drawable.sample_1，
R.drawable.sample_2，R.drawable.sample_3，
R.drawable.sample_4，R.drawable.sample_5，
R.drawable.sample_6，R.drawable.sample_7
};
}
使用了 OnTouchListener 以这种方式。阅读上MotionEvent类型，如 ACTION_UP ， ACTION_MOVE 和 ACTION_DOWN 这意味着，关键是pressed这里，老鼠很感动，或重点在这里pssed未$ P $ ...
公共无效addListenerToGrid（）{
GridView控件=（GridView控件）findViewById（R.id.gridView1）;
gridView.setOnTouchListener（新OnTouchListener（）{
公共布尔onTouch（视图V，MotionEvent我）{
INT行动= me.getActionMasked（）;
浮currentXPosition = me.getX（）;
浮currentYPosition = me.getY（）;
INT位置= gridView.pointToPosition（（INT）currentXPosition，（INT）currentYPosition）;
如果（动作== MotionEvent.ACTION_UP）{
//重点是$ P $这里pssed
}
返回true;
}
I am using the following code to do things with gridview(slightly modified from http://developer.android.com/resources/tutorials/views/hello-gridview.html). I want to replace the onClicklistener and the onClick() method with their "touch" equivalents i.e. touchlistener and onTouch() so that when i touch an element in the gridview the image of the element changes and a double touch on the same element takes it back to the orginal state.
How do I do this? I can't get my code to do this. The clicklistener works to some extent but the touch isn't. Please help.
public class ImageAdapter extends BaseAdapter {
private Context mContext;
public ImageAdapter(Context c) {
mContext = c;
}
public int getCount() {
return mThumbIds.length;
}
public Object getItem(int position) {
return null;
}
public long getItemId(int position) {
return 0;
}
// create a new ImageView for each item referenced by the Adapter
public View getView(int position, View convertView, ViewGroup parent) {
ImageView imageView;
if (convertView == null) { // if it's not recycled, initialize some attributes
imageView = new ImageView(mContext);
imageView.setLayoutParams(new GridView.LayoutParams(85, 85));
imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
imageView.setPadding(8, 8, 8, 8);
imageView.setOnClickListener(new View.OnClickListener()
{
@Override
public void onClick(View view)
{
if(position==0)
{
//do this
}
else
{
//do this
}
}
});
} else {
imageView = (ImageView) convertView;
}
imageView.setImageResource(mThumbIds[position]);
return imageView;
}
// references to our images
private Integer[] mThumbIds = {
R.drawable.sample_2, R.drawable.sample_3,
R.drawable.sample_4, R.drawable.sample_5,
R.drawable.sample_6, R.drawable.sample_7,
R.drawable.sample_0, R.drawable.sample_1,
R.drawable.sample_2, R.drawable.sample_3,
R.drawable.sample_4, R.drawable.sample_5,
R.drawable.sample_6, R.drawable.sample_7,
R.drawable.sample_0, R.drawable.sample_1,
R.drawable.sample_2, R.drawable.sample_3,
R.drawable.sample_4, R.drawable.sample_5,
R.drawable.sample_6, R.drawable.sample_7
};
}
Use the OnTouchListener in this way. Read up on MotionEvent types like ACTION_UP, ACTION_MOVE, and ACTION_DOWN which mean that the key was pressed here, mouse was moved, or key was unpressed here...
public void addListenerToGrid() {
gridView = (GridView) findViewById(R.id.gridView1);
gridView.setOnTouchListener(new OnTouchListener() {
public boolean onTouch(View v, MotionEvent me) {
int action = me.getActionMasked();
float currentXPosition = me.getX();
float currentYPosition = me.getY();
int position = gridView.pointToPosition((int) currentXPosition, (int) currentYPosition);
if (action == MotionEvent.ACTION_UP) {
// Key was pressed here
}
return true;
}
这篇关于Android的初学者：android的gridview的触摸事件的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
