如何在ListView中更新某些不可见项的视图？[安卓]

您从错误的角度解决了这个问题。您不应该在适配器外部编辑视图，这就是适配器的用途。而是编写您自己的适配器。像这样做：

import android.content.Context;
import android.support.annotation.NonNull;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.BaseAdapter;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.TextView;

/**
 * A {@link ArrayAdapter} to let the user select multiple notification times.
 */
public class ReminderNotificationsAdapter extends BaseAdapter implements CompoundButton.OnCheckedChangeListener {

    /**
     * A array with all currently selected entries
     */
    private boolean[] mSelected;

    /**
     * A array with all enabled entries
     */
    private boolean[] mEnabled;

    /**
     * The items to be shown
     */
    private String[] mItems;

    /**
     * A {@link Context}
     */
    private Context mContext;

    /**
     * Creates a new instance
     *
     * @param context a {@link Context}
     * @param items all selectable items
     * @param checkedItems all selected items. This array will be updated with the users selectiion
     * @param enabledItems all enabled items
     */
    public ReminderNotificationsAdapter(Context context, String[] items, boolean[] checkedItems, boolean[] enabledItems) {
        // Check array sizes
        if(items.length != checkedItems.length || checkedItems.length != enabledItems.length) {
            throw new RuntimeException("All arrays must be the same size");
        }

        // Add all and store params
        this.mContext = context;
        this.mItems = items;
        this.mSelected = checkedItems;
        this.mEnabled = enabledItems;

    }

    @Override
    public int getCount() {
        return this.mItems.length;

    }

    @Override
    public String getItem(int i) {
        return this.mItems[i];

    }

    @Override
    public long getItemId(int i) {
        return this.getItem(i).hashCode();

    }

    @NonNull
    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        View v = convertView;

        // Create view if not provided to convert
        if(v == null) {
            v = LayoutInflater.from(this.mContext).inflate(R.layout.dialog_list_multiple_choise, parent, false);
        }

        // Prepare text view
        TextView tv = (TextView) v.findViewById(android.R.id.text1);
        tv.setText(this.getItem(position));
        tv.setEnabled(this.isEnabled(position));

        // Prepare checkbox
        CheckBox cb = (CheckBox) v.findViewById(android.R.id.checkbox);
        cb.setTag(position);
        cb.setChecked(this.mSelected[position]);
        cb.setEnabled(this.isEnabled(position));
        cb.setOnCheckedChangeListener(this);

        // Return view
        return v;

    }

    @Override
    public boolean isEnabled(int position) {
        return this.mEnabled[position];

    }

    @Override
    public void onCheckedChanged(CompoundButton compoundButton, boolean b) {
        this.mSelected[(Integer) compoundButton.getTag()] = b;

    }
}

并像这样使用它：

@Override
public void onClick(View view) {
    // Tell what string should be shown
    String[] entries = this.getResources().getStringArray(R.array.reminder_notifications);

    // Tell what entries should be already selected
    final boolean[] selectedEntries = new boolean[entries.length];
    selectedEntries[2] = true;

    // Tell what entries should be enabled
    boolean[] enabledEntries = new boolean[entries.length];
    enabledEntries[0] = true;
    enabledEntries[1] = true;
    enabledEntries[2] = true;
    enabledEntries[3] = true;

    // Create the adapter
    ReminderNotificationsAdapter a = new ReminderNotificationsAdapter(this, entries, selectedEntries, enabledEntries);

    // Create and show the dialog
    new AlertDialog.Builder(this)
            .setTitle("Add notification")
            .setAdapter(a, null)
            .setPositiveButton("Set", new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialogInterface, int i) {
                    // Do what you want to do with the selected entries
                    Toast.makeText(MainActivity.this, Arrays.toString(selectedEntries), Toast.LENGTH_SHORT).show();

                }
            })
            .setNegativeButton("Dismiss", null)
            .show();

}

我只是使用一个布尔数组来告诉应该启用和选择哪些条目，如果需要，您可以在此处做些更优雅的事情。用户的选择在提供给适配器的构造函数的数组中更新。AlertDialog看起来像这样：

在此处查看完整的示例应用程序。