从底座适配器滚动到列表视图的底部
我有一个ListView并在那里ListView我有一个ImageButton。当用户点击ImageButton时，一个新的项目会被夸大，但每次添加一个新项目时，我都必须向下滚动才能看到添加的项目。我需要帮助才能在添加后自动移动到最后一个项目。从底座适配器滚动到列表视图的底部
请注意，我的ImageButton是在一个不同的布局（但它是列表视图的一部分），并且相同的布局有一个LinearLayout作为我充气的子视图的父视图。
这是我的xml：
<?xml version="1.0" encoding="utf-8"?> <RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/relativeLayoutOther"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingBottom="@dimen/_5sdp">
<TextView
android:id="@+id/objectiveOtherCheckBox"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Add Other Objectives"
android:layout_marginStart="@dimen/_10sdp"
android:layout_marginTop="@dimen/_10sdp"
android:textColor="@color/common_google_signin_btn_text_light_focused"
android:textSize="@dimen/_12ssp" />
<ImageButton
android:id="@+id/addOtherObjectiveTextBox"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toRightOf="@+id/objectiveOtherCheckBox"
android:layout_marginLeft="@dimen/_10sdp"
android:layout_marginTop="@dimen/_10sdp"
android:background="@drawable/round_button2"
android:src="@android:drawable/ic_input_add"/>
//parent layout
<LinearLayout
android:id="@+id/otherObjLinearLayout"
android:layout_width="wrap_content"
android:layout_marginTop="@dimen/_15sdp"
android:layout_marginLeft="@dimen/_10sdp"
android:layout_below="@+id/objectiveOtherCheckBox"
android:layout_height="wrap_content"
android:orientation="vertical"/>
</RelativeLayout>
这是我的基本适配器内部的代码膨胀子视图。在这个功能中，我想在添加一个项目后将ListView滚动到底部。
ImageButton imageButton = (ImageButton) convertView.findViewById(R.id.addOtherObjectiveTextBox); imageButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//Toast.makeText(v.getContext(), "Clicked123", Toast.LENGTH_SHORT).show();
final Dialog dialog = new Dialog(v.getContext());
dialog.setContentView(R.layout.otherobjectivedialog);
final EditText enterObjET = (EditText) dialog.findViewById(R.id.enterObjEditText);
Button closeEnterObjBtn = (Button) dialog.findViewById(R.id.closeEnterObjDialog);
Button objConfirmBtn = (Button) dialog.findViewById(R.id.enterObjConfirmBtn);
closeEnterObjBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
dialog.dismiss();
}
});
objConfirmBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(final View v) {
final String enteredObj = enterObjET.getText().toString();
if(enteredObj.equals("")){
Toast.makeText(v.getContext(), "Please write a objective", Toast.LENGTH_LONG).show();
}else {
final View editChildView = layoutInflater.inflate(R.layout.other_objective_edittext, null);
editParentLL.addView(editChildView);
final TextView tvOO = editChildView.findViewById(R.id.otherobjTextView);
ImageView ivOOEdit = editChildView.findViewById(R.id.otherobjEdit);
ImageView ivOODelete = editChildView.findViewById(R.id.otherobjDelete);
tvOO.setText(enteredObj);
ivOODelete.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
int posValue2 = editParentLL.indexOfChild(editChildView);
editParentLL.removeView(editChildView);
otherObjList.remove(posValue2);
}
});
ivOOEdit.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
int editPosValue = editParentLL.indexOfChild(editChildView);
final Dialog dialog2 = new Dialog(con);
dialog2.setContentView(R.layout.otherobjectivedialog);
final EditText enterObjET2 = (EditText) dialog2.findViewById(R.id.enterObjEditText);
Button closeEnterObjBtn2 = (Button) dialog2.findViewById(R.id.closeEnterObjDialog);
Button objConfirmBtn2 = (Button) dialog2.findViewById(R.id.enterObjConfirmBtn);
String otherObjectiveTextToEdit = otherObjList.get(editPosValue);
enterObjET2.setText(otherObjectiveTextToEdit);
closeEnterObjBtn2.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
dialog2.dismiss();
}
});
objConfirmBtn2.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
int editPosValue2 = editParentLL.indexOfChild(editChildView);
final String enteredObj2 = enterObjET2.getText().toString();
if(enteredObj2.equals("")){
Toast.makeText(con, "Please write a objective", Toast.LENGTH_LONG).show();
}else {
dialog2.dismiss();
tvOO.setText(enteredObj2);
otherObjList.put(editPosValue2, enteredObj2);
}
}
});
dialog2.show();
}
});
//objectiveOtherET.setText(objectiveOtherET.getText().toString()+ " \n" + enteredObj);
//Log.i("POS", "onClick: "+editParentLL.indexOfChild(editChildView));
otherObjList.put(oo, enteredObj);
oo++;
dialog.dismiss();
}
}
});
dialog.show();
/* LinearLayout linearLayoutNew = new LinearLayout(con);
linearLayoutNew.setOrientation(LinearLayout.VERTICAL);
et = new EditText(con);
LinearLayout.LayoutParams p = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);
et.setLayoutParams(p);
et.setHint("Set some objective");
linearLayoutNew.addView(et);
ll.addView(linearLayoutNew);*/
}
回答：
通知列表更改后，您需要调用ListView上的滚动。
list_View.smoothScrollToPosition(list_View.getChildCount()); 或者如果从非UI线程调用。
list_View.post(new Runnable() { @Override
public void run() {
list_View.smoothScrollToPosition(list_View.getChildCount());
}
});
以上是 从底座适配器滚动到列表视图的底部 的全部内容， 来源链接： utcz.com/qa/261142.html
