recycler View Item 它没有显示 Ripple effect/touch 高亮显示,我通过使用手势 Detractor 应用了 Listener
recycler View Item it is not showing Ripple effect/touch highlight, i applied Listener by using gesture Detractor
recyclerView.addOnItemTouchListener(new MyListClickListener(getContext(), new MyListClickListener.ClickListener() {
@覆盖
public void onClick(View v, int position) {
TextView textView = (TextView) v.findViewById(R.id.title);
Fragment fragment = ((MyPagerAdapter) viewPager.getAdapter()).getFragment(1);
FragmentTransaction ft = getFragmentManager().beginTransaction();
ft.detach(fragment);
fragment.onDestroy();
ft.attach(fragment);
ft.commit();
comm.sendData(String.valueOf(textView.getText()));
viewPager.setCurrentItem(1);
}
}));
public class MyListClickListener 实现 RecyclerView.OnItemTouchListener {
private GestureDetector gestureDetector;
ClickListener clickListener;
public MyListClickListener(Context context, ClickListener clickListener){
this.clickListener = clickListener;
gestureDetector = new GestureDetector(context,new GestureDetector.SimpleOnGestureListener(){
@Override
public boolean onSingleTapUp(MotionEvent e) {
return true;
}
});
}
@Override
public boolean onInterceptTouchEvent(RecyclerView rv, MotionEvent e) {
View child = rv.findChildViewUnder(e.getX(),e.getY());
if(child!= null && clickListener!= null && gestureDetector.onTouchEvent(e)){
clickListener.onClick(child,rv.getChildPosition(child));
}
return true;
}
@Override
public void onTouchEvent(RecyclerView rv, MotionEvent e) {
}
public interface ClickListener {
void onClick(View v, int position);
}
}
我认为您正在寻找涟漪效应。只需在 drawable 中创建一个 xml 文件 (ripple.xml) 并在
中写入此代码
<?xml version="1.0" encoding="utf-8"?>
<ripple xmlns:android="http://schemas.android.com/apk/res/android"
android:color="?attr/colorControlHighlight">
<item
android:id="@android:id/mask"
android:drawable="@android:color/white"
>
</item>
</ripple>
& 只需在另一个 xml 文件中写下两行,您已在其中声明了 recyclerview 元素。
android:background="@drawable/ripple"
android:clickable="true"
就像我的情况一样,我只有 TextView,在父标签中我声明了这两行
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/ripple"
android:clickable="true"
>
<TextView
android:id="@+id/textView_Username"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="30sp"
android:textColor="@color/colorPrimary"
android:layout_marginLeft="10dp"
android:layout_marginTop="10dp"
/>
</LinearLayout>
最后结果:
观看此视频:
您刚刚在 Recyclar 项目布局根视图中添加了两行
android:clickable="true"
android:foreground="?android:selectableItemBackground"
<LinearLayout
android:id="@+id/root"
android:layout_width="match_parent"
android:layout_height="30dp"
android:clickable="true"
android:foreground="?android:selectableItemBackground">
<TextView
android:layout_width="match_parent"
android:layout_height="20dp" />
</LinearLayout>
recyclerView.addOnItemTouchListener(new MyListClickListener(getContext(), new MyListClickListener.ClickListener() { @覆盖 public void onClick(View v, int position) {
TextView textView = (TextView) v.findViewById(R.id.title);
Fragment fragment = ((MyPagerAdapter) viewPager.getAdapter()).getFragment(1);
FragmentTransaction ft = getFragmentManager().beginTransaction();
ft.detach(fragment);
fragment.onDestroy();
ft.attach(fragment);
ft.commit();
comm.sendData(String.valueOf(textView.getText()));
viewPager.setCurrentItem(1);
}
}));
public class MyListClickListener 实现 RecyclerView.OnItemTouchListener {
private GestureDetector gestureDetector;
ClickListener clickListener;
public MyListClickListener(Context context, ClickListener clickListener){
this.clickListener = clickListener;
gestureDetector = new GestureDetector(context,new GestureDetector.SimpleOnGestureListener(){
@Override
public boolean onSingleTapUp(MotionEvent e) {
return true;
}
});
}
@Override
public boolean onInterceptTouchEvent(RecyclerView rv, MotionEvent e) {
View child = rv.findChildViewUnder(e.getX(),e.getY());
if(child!= null && clickListener!= null && gestureDetector.onTouchEvent(e)){
clickListener.onClick(child,rv.getChildPosition(child));
}
return true;
}
@Override
public void onTouchEvent(RecyclerView rv, MotionEvent e) {
}
public interface ClickListener {
void onClick(View v, int position);
}
}
我认为您正在寻找涟漪效应。只需在 drawable 中创建一个 xml 文件 (ripple.xml) 并在
中写入此代码<?xml version="1.0" encoding="utf-8"?>
<ripple xmlns:android="http://schemas.android.com/apk/res/android"
android:color="?attr/colorControlHighlight">
<item
android:id="@android:id/mask"
android:drawable="@android:color/white"
>
</item>
</ripple>
& 只需在另一个 xml 文件中写下两行,您已在其中声明了 recyclerview 元素。
android:background="@drawable/ripple"
android:clickable="true"
就像我的情况一样,我只有 TextView,在父标签中我声明了这两行
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/ripple"
android:clickable="true"
>
<TextView
android:id="@+id/textView_Username"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="30sp"
android:textColor="@color/colorPrimary"
android:layout_marginLeft="10dp"
android:layout_marginTop="10dp"
/>
</LinearLayout>
最后结果:
观看此视频:
您刚刚在 Recyclar 项目布局根视图中添加了两行
android:clickable="true"
android:foreground="?android:selectableItemBackground"
<LinearLayout
android:id="@+id/root"
android:layout_width="match_parent"
android:layout_height="30dp"
android:clickable="true"
android:foreground="?android:selectableItemBackground">
<TextView
android:layout_width="match_parent"
android:layout_height="20dp" />
</LinearLayout>