Question

我制作了一个包含ImageView，TextView和删除按钮的自定义视图我想在单击与其关联的删除按钮时重置特定视图请告诉我们如何实现这一点。

这是我的MainActivity.java

package com.khurana.nikhil.list1;

import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends ActionBarActivity {
ListView lv;
TextView tv1, tv2;
View v1;
public String[] s = {"nikhil", "mukul", "kunal"};
public int[] img = {R.drawable.rty, R.drawable.sf, R.drawable.rty};

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    ListView lv = (ListView) findViewById(R.id.listView);


    CustomAdapter cad = new CustomAdapter(MainActivity.this, s, img);
    lv.setAdapter(cad);


    lv.setOnItemClickListener(new AdapterView.OnItemClickListener()
    {

        public void onItemClick(AdapterView<?> parent,View v,int position,long id)
        {
            Toast.makeText(MainActivity.this,"You clicked "+s[position],Toast.LENGTH_SHORT).show();

        }

    });


}
}

这是CustomAdapter.java

package com.khurana.nikhil.list1;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;

public class CustomAdapter extends ArrayAdapter<String>{


Context c1;
String s1[];
int s2[];
CustomAdapter(Context c,String s[],int s3[])
{
    super(c,R.layout.tcustom,s);
    this.c1=c;
    this.s1=s;
    this.s2=s3;



}

public View getView(int position,View v,ViewGroup parent)
{
    LayoutInflater li=(LayoutInflater) c1.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

     v=li.inflate(R.layout.tcustom,null);
    TextView tv=(TextView)v.findViewById(R.id.textView);
    ImageView im=(ImageView)v.findViewById(R.id.imageview);
    tv.setText(s1[position]);
    im.setImageResource(s2[position]);
    Button bt=(Button)v.findViewById(R.id.button);
    return v;
}
}

Answer 1

((LinearLayout)yourView.getParent()).removeView(yourView);

或者您可以直接从布局中调用

yourRelativeLayout.removeView(yourView)

Answer 2

我建议在Adapter类中使用ArrayList而不是String []。它使删除或编辑View及其后面的相关数据变得更加容易。我使用this post将String []转换为ArrayList，删除该项并转换回String []。

这应该适用于按钮点击：

在适配器类中：

public View getView(int position,View v,ViewGroup parent)
{
    LayoutInflater li=(LayoutInflater) c1.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

    v=li.inflate(R.layout.tcustom,null);
    TextView tv=(TextView)v.findViewById(R.id.textView);
    ImageView im=(ImageView)v.findViewById(R.id.imageview);
    tv.setText(s1[position]);
    im.setImageResource(s2[position]);

    Button bt=(Button)v.findViewById(R.id.button);
    bt.setTag(position); //important so we know which item to delete on button click

    bt.setOnClickListener(new View.OnClickListener() {
     public void onClick(View v)
      {
        int positionToRemove = v.getTag(); //get the position of the view to delete stored in the tag
        removeItem(positionToRemove); //remove the item
      } 
    });

    return v;
}

public void removeItem(int position){
 //convert array to ArrayList, delete item and convert back to array
  ArrayList<String> a = new ArrayList<>(Arrays.asList(s1));
  a.remove(i);
  strings = new String[a.size()];
  s1= a.toArray(strings);
  notifyDataSetChanged(); //refresh your listview based on new data
}

 @Override
 public int getCount() {
   return s1.length;
 }

 @Override
 public String getItem(int position) {
   return s1[position];
 }

Answer 3

查看GONE的可见性也不会从内存中删除您的视图。具体来说，您是否希望保留未来的观点？

Answer 4

如果您在列表视图中工作，则应拨打notifyDataSetChanged()适配器。你的getView（）方法可以是：按钮上的动作可以是这样的

Button bt=(Button)v.findViewById(R.id.button);
bt.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {

              s1 = ArrayUtils.remove(s1, position);
              s2 = ArrayUtils.remove(s2, position);
              notifyDataSetChanged();
            }
        });

Answer 5

如果您希望视图消失：

yourView.setVisibility(View.GONE);

编辑：获取按钮的父视图：Android: Making changes to a button's parent view

如何通过单击删除按钮重置整个视图

5 个答案: