• 如何将地质构造者与ItemLongClick结合起来?
我有一份载有三张图像的《GridView》。 当我谈到第一个形象时,我要展示一个托阿斯特信息。 当我从屏幕上提升我的指手时,我要显示第二个托阿斯特信息。
我知道,GestureDetector使用Event,但ItemLongClick没有。 但是,在这种情况下,我需要跟踪电网中的图像位置识别,因此不可能在Touch()实施?
• 如何将地质构造者与ItemLongClick结合起来?
我有一份载有三张图像的《GridView》。 当我谈到第一个形象时,我要展示一个托阿斯特信息。 当我从屏幕上提升我的指手时,我要显示第二个托阿斯特信息。
我知道,GestureDetector使用Event,但ItemLongClick没有。 但是,在这种情况下,我需要跟踪电网中的图像位置识别,因此不可能在Touch()实施?
你可以跟踪治疗者的动议,看看看它是否使用这一类别,如果它跨越下一个情况,你可以处理这一事件。 这方面的例子有:
@Override public boolean onTouchEvent(MotionEvent event) {
int action = event.getActionMasked();
if (action != MotionEvent.ACTION_UP && action != MotionEvent.ACTION_CANCEL) {
int N = event.getHistorySize();
int P = event.getPointerCount();
for (int i = 0; i < N; i++) {
for (int j = 0; j < P; j++) {
mCurX = event.getHistoricalX(j, i);
mCurY = event.getHistoricalY(j, i);
drawPoint(mCurX, mCurY,
event.getHistoricalPressure(j, i),
event.getHistoricalTouchMajor(j, i));
}
}
for (int j = 0; j < P; j++) {
mCurX = event.getX(j);
mCurY = event.getY(j);
drawPoint(mCurX, mCurY, event.getPressure(j), event.getTouchMajor(j));
}
}
return true;
}
您可以读到更多版本,见以下网址:C:YourInstall Dirandroid-sdksamplesandroid-10ApiDemossrccomexampleandroidapisgraphics TouchPaint.java, 或只是查阅动议的全部案例。 活动在其中增加了几个用途。
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