删除Imageview创建的所有图像
问题描述:
我使用wordImage创建了n个图像并分配了不同的Id.This发生在按钮单击添加上。当我点击所有我创建的图像应该从视图中移除时(Head是视图),还有另一个按钮被删除。 Plz帮助如何做到这一点。删除Imageview创建的所有图像
onclick of add button
for (int getwordcount = 0; getwordcount <5; getwordcount++) {
int i=0;
WordImage = new ImageView(this);
WordImage.setId(getwordcount);
WordImage.setBackgroundResource(alphabetsimages[getwordcount]);
RelativeLayout.LayoutParams para=new RelativeLayout.LayoutParams(
RelativeLayout.LayoutParams.FILL_PARENT,
RelativeLayout.LayoutParams.FILL_PARENT);
para.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);
para.leftMargin=maragin+=54;
para.bottomMargin=25;
para.width=BtnNext.getWidth()/3;
para.height=BtnNext.getHeight();
WordImage.setLayoutParams(para);
WordImage.setTag(getSplitString);
Head.addView(WordImage);
}
删除按钮 的onclick
只有最后------------->Head.removeView(WordImage);
创建图像从视图移除。 如何删除使用wordimage创建的所有图像。任何帮助将不胜感激。
答
WordImage保存链接只为最后ImageView。上一页链接在此行中丢失:
WordImage = new ImageView(this);
这就是为什么Head.removeView(WordImage)只删除最后一个图像。 如果你想删除所有添加的图像元素,最简单的方法做到这一点是添加的RelativeLayout容器是这样的:
Head.removeAllViews();
在其他:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<RelativeLayout android:id="@+id/Head" android:layout_width="wrap_content" android:layout_height="wrap_content"/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="add"
android:onClick="onClickAdd"
android:id="@+id/button" android:layout_alignParentStart="true"/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="remove"
android:onClick="onClickRemove"
android:layout_alignBaseline="@id/button"
android:layout_alignParentRight="true"/>
</RelativeLayout>
那么你只能通过一个命令删除所有图像情况下,如果你需要删除单独的图像,你必须删除类似的“添加”块周期的项目:
for (int getwordcount = 0; getwordcount <alphabetsimages.length; getwordcount++) {
Head.removeView(findViewById(getwordcount));
}
Activity类将是这样的:
public class MyActivity extends Activity {
RelativeLayout Head;
int alphabetsimages[] = {android.R.drawable.arrow_down_float, android.R.drawable.btn_dropdown, android.R.drawable.btn_minus, android.R.drawable.ic_dialog_map};
ImageView WordImage;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
}
public void onClickAdd(View v){
int margin = 0;
for (int getwordcount = 0; getwordcount <alphabetsimages.length; getwordcount++) {
int i=0;
WordImage = new ImageView(this);
WordImage.setId(getwordcount);
WordImage.setBackgroundResource(alphabetsimages[getwordcount]);
RelativeLayout.LayoutParams para=new RelativeLayout.LayoutParams(
RelativeLayout.LayoutParams.FILL_PARENT,
RelativeLayout.LayoutParams.FILL_PARENT);
para.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);
para.leftMargin=margin+=54;
para.bottomMargin=25;
para.width = 40;
para.height = 40;
WordImage.setLayoutParams(para);
Head= (RelativeLayout)findViewById(R.id.Head);
Head.addView(WordImage);
}
}
public void onClickRemove(View v){
//Head.removeAllViews();
for (int getwordcount = 0; getwordcount <alphabetsimages.length; getwordcount++) {
Head.removeView(findViewById(getwordcount));
}
}
}
我希望这就是您的需要!
'用wordImage创建n个图像'你创建了什么样的'图像'? '一个按钮点击add.'您添加到哪里?头部我看。头是什么?请显示完整删除代码。什么是'WordImage'? – greenapps 2014-10-05 10:47:49