点击删除按钮我想删除该特定行

Question

点击删除按钮我要删除该特定行

我在这里提交了三个我的项目文件，点击删除按钮我要删除该特定行。

list_mobile.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="5dp" >

<ImageView
    android:id="@+id/logo"
    android:layout_width="50px"
    android:layout_height="50px"
    android:layout_marginLeft="5px"
    android:layout_marginRight="20px"
    android:layout_marginTop="5px"
    android:src="@drawable/windowsmobile_logo" >
</ImageView>

<TextView
    android:id="@+id/label"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="@+id/label"
    android:textSize="30px" >
</TextView>

<Button
    android:id="@+id/button1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="delete" />
   </LinearLayout>

listmobileactivity.java

package com.mkyong.android;
import com.mkyong.android.adaptor.MobileArrayAdapter;
import android.app.ListActivity;
import android.os.Bundle;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.Toast;
import android.view.View;
public class ListMobileActivity extends ListActivity {

static final String[] MOBILE_OS = new String[] { "Android", "iOS",
        "WindowsMobile", "Blackberry"};

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    //setListAdapter(new ArrayAdapter<String>(this, R.layout.list_mobile,
    //      R.id.label, MOBILE_OS));

    setListAdapter(new MobileArrayAdapter(this, MOBILE_OS));


}

@Override
protected void onListItemClick(ListView l, View v, int position, long id) {

    //get selected items
    String selectedValue = (String) getListAdapter().getItem(position);
    Toast.makeText(this, selectedValue, Toast.LENGTH_SHORT).show();


}

}

mobilearrayadapter.java

package com.mkyong.android.adaptor;
import com.mkyong.android.R;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.TextView;
public class MobileArrayAdapter extends ArrayAdapter<String> {
private final Context context;
private final String[] values;

public MobileArrayAdapter(Context context, String[] values) {
    super(context, R.layout.list_mobile, values);
    this.context = context;
    this.values = values;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    LayoutInflater inflater = (LayoutInflater) context
            .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    View rowView = inflater.inflate(R.layout.list_mobile, parent, false);
    TextView textView = (TextView) rowView.findViewById(R.id.label);
    ImageView imageView = (ImageView) rowView.findViewById(R.id.logo);
    textView.setText(values[position]);

    // Change icon based on name
    String s = values[position];

    System.out.println(s);

    if (s.equals("WindowsMobile")) {
        imageView.setImageResource(R.drawable.windowsmobile_logo);
    } else if (s.equals("iOS")) {
        imageView.setImageResource(R.drawable.ios_logo);
    } else if (s.equals("Blackberry")) {
        imageView.setImageResource(R.drawable.blackberry_logo);
    } else {
        imageView.setImageResource(R.drawable.android_logo);
    }

    return rowView;
}
}

Answer 1

您需要从适配器中删除该项并刷新列表。

@Override
protected void onListItemClick(ListView l, View v, int position, long id) {
    MobileArrayAdapter la = (MobileArrayAdapter) getListAdapter();
    la.remove(la.getItem(position));
    la.notifyDataSetChanged();
}

Answer 2

做这样的事情

public class ListMobileActivity extends ListActivity {

String[] MOBILE_OS = new String[] { "Android", "iOS",
"WindowsMobile", "Blackberry"};

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);

//setListAdapter(new ArrayAdapter<String>(this, R.layout.list_mobile,
    //      R.id.label, MOBILE_OS));

}
@Override
protected void onResume() {
super.onResume();
setListAdapter(new MobileArrayAdapter(this, MOBILE_OS));
}
@Override
protected void onListItemClick(ListView l, View v, int position, long id) {

//get selected items
String[] MOBILE_OS = new String[] { "Android", "iOS",
"WindowsMobile", "Blackberry"};
String[] newArray = new String[MOBILE_OS.length()-1];
[tmp] =0;
for(int i=0;i<MOBILE_OS.length();i++){
if(i!=position){
newArray[tmp] = MOBILE_OS[i];
tmp++;
}
} 
MOBILE_OS = newArray;
onResume();

}

Answer 3

我重写您的mobilearrayadapter.java以包含点击监听器按钮。我建议使用ArrayList<String>代替String[]来轻松添加和删除行

   import ...
.
.
.
public class MobileArrayAdapter extends ArrayAdapter<String> {
private final Context context;
private final String[] values;
private LayoutInflater inflater = null;

public MobileArrayAdapter(Context context, String[] values) {
    super(context, R.layout.list_mobile, values);
    inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    this.context = context;
    this.values = values;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    View rowView = convertView;
    if(convertView == null)
         rowView = inflater.inflate(R.layout.list_mobile, parent, false);

    TextView textView = (TextView) rowView.findViewById(R.id.label);
    ImageView imageView = (ImageView) rowView.findViewById(R.id.logo);
    Button delBtn = (Button) rowView.findViewById(R.id.button1);
    delBtn..setOnClickListener(mOnClickListener);
    delBtn.setTag(position);
    textView.setText(values[position]);

    // Change icon based on name
    String s = values[position];

    System.out.println(s);

    if (s.equals("WindowsMobile")) {
        imageView.setImageResource(R.drawable.windowsmobile_logo);
    } else if (s.equals("iOS")) {
        imageView.setImageResource(R.drawable.ios_logo);
    } else if (s.equals("Blackberry")) {
        imageView.setImageResource(R.drawable.blackberry_logo);
    } else {
        imageView.setImageResource(R.drawable.android_logo);
    }

    return rowView;
}


private OnClickListener mOnClickListener = new OnClickListener() {

        @Override
        public void onClick(View v) {
             int position = (Integer) v.getTag();
            Toast.makeText(MainLocalListAdapter.this.context, ""+position, Toast.LENGTH_SHORT).show();

// After remove row from list call this

notifyDataSetChanged();
        }
    };
}