我想将TextView作为GestureOverlayView的子元素。在Android中从GestureOverlayView获取孩子
这里是我的看法XML代码:
<RelativeLayout android:layout_width="fill_parent" android:id="@+id/relativeLayout1" android:layout_height="wrap_content">
<android.gesture.GestureOverlayView android:layout_height="wrap_content" android:id="@+id/gestureOverlayView1" android:layout_width="wrap_content" android:layout_alignParentTop="true" android:layout_alignParentRight="true" android:layout_alignParentLeft="true">
<LinearLayout android:orientation="horizontal" android:layout_width="fill_parent" android:id="@+id/linearLayout2" android:layout_height="wrap_content">
<LinearLayout android:orientation="horizontal" android:weightSum="1" android:layout_width="260dp" android:id="@+id/linearLayout1" android:layout_height="wrap_content" android:baselineAligned="false" android:layout_weight="0.32">
<CheckBox android:id="@+id/sListCheckbox" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_weight="0.32"></CheckBox>
<TextView android:text="TextView" android:id="@+id/sListText" android:layout_width="212dp" android:ems="15" android:layout_gravity="center" android:textAppearance="?android:attr/textAppearanceLarge" android:singleLine="true" android:layout_height="wrap_content" android:layout_weight="0.32"></TextView>
</LinearLayout>
<ImageView android:paddingRight="0dp" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center_vertical" android:layout_weight="0.32" android:id="@+id/imageView1" android:src="@drawable/searchbutton"></ImageView>
</LinearLayout>
</android.gesture.GestureOverlayView>
</RelativeLayout>
,我试图达到的TextView这样的,但我对childText得到NullPointerException异常
adapterLine.gestureOverlayView.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
if (gestureDetector.onTouchEvent(event)) {
RelativeLayout llt = (RelativeLayout) v.getParent();
TextView childText = (TextView) llt.getChildAt(4);
程序崩溃在哪一行?你能发布异常/错误日志吗?我的猜测是你没有得到正确的父视图。请发布代码,你 得到v。 – Jack
childText返回null – cagryInside