Android Gridview 和按钮 OnItemclick

这是我认为准确的 buttonAdapter 类:

package com.example.test;

import android.content.Context;
import android.graphics.Color;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.GridView;

public class ButtonAdapter extends BaseAdapter {
    private Context mContext;
    public String [] fName = { "File 1", "File 2", "Roflcopters"};

    // Gets the context so it can be used later
    public ButtonAdapter(Context c) { mContext = c; }

    // Total number of things contained within the adapter
    public int getCount () { return 8; }

    // Require for structure, not really used in my code.
    public Object getItem (int position) {  return null; }

    // Require for structure, not really used in my code. Can be used to get the id of an item in the adapter for manual control.
    public long getItemId (int position) { return position; }

    public View getView (int position, View convertView, ViewGroup parent){
        Button btn;
        if (convertView == null) {      // if it's not recycled, initialize some attributes
            btn = new Button (mContext);
            btn.setLayoutParams (new GridView.LayoutParams (190, 190));
            btn.setPadding (1, 1, 1, 1);
        } else {
            btn = (Button) convertView;
        }
      // btn.setText(filesnames[position]);
      // filenames is an array of strings
      //btn.setTextColor (Color.WHITE);
      //btn.setBackgroundResource (R.drawable.sample_2);
      //btn.setBackgroundColor (Color.BLACK);
      btn.setHighlightColor(Color.GREEN);
      btn.setId (position);

      return btn;
    }
}

这是我的家庭课。我无法解决 onItemClick 问题。我在这里做错了什么:

package com.example.test;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.GridView;
import android.widget.Toast;

public class home extends Activity implements OnItemClickListener {

    public final static String EXTRA_MESSAGE1 = "com.example.text.MESSAGE";

    public void onCreate (Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView (R.layout.activity_home);

        GridView gridview = (GridView) findViewById (R.id.gridview);
        gridview.setAdapter (new ButtonAdapter (this));

        /*gridview.setOnItemClickListener (new OnItemClickListener () {
           public void onItemClick (AdapterView <?> parent, View v, int position, long id) {
            Toast.makeText (home.this, "" + position, Toast.LENGTH_LONG).show ();
            Intent intent = new Intent (this, alarm.class);
            String message = "Position:" + position;
            intent.putExtra(EXTRA_MESSAGE1, message);
            startActivity (intent);
            }
        });
     * */
     }

    @Override
    public void onItemClick (AdapterView <?> parent, View v, int position, long id) {
        Intent intent = new Intent (this, alarm.class);
        String message = "Position:" + position;
        intent.putExtra(EXTRA_MESSAGE1, message);
        startActivity (intent);
    }
}

onItemClick 不起作用，当它没有被注释掉并且“onItemClick”被注释时，注释的“setOnItemClickListener”也不起作用。我究竟做错了什么？

最佳答案

如果 GridView, ListView 有像 BUtton 这样的可点击控件，那么 onItemClick 将不会被触发。
您需要在适配器的 Button Click listener 方法中实现 getView。

喜欢

public View getView(int position, View convertView, ViewGroup parent) {
    Button btn;
    if (convertView == null) { // if it's not recycled, initialize some
                                // attributes btn = new Button (mContext);
        btn.setLayoutParams(new GridView.LayoutParams(190, 190));
        btn.setPadding(1, 1, 1, 1);
    } else {
        btn = (Button) convertView;
    } // btn.setText(filesnames[position]); // filenames is an array of
        // strings //btn.setTextColor (Color.WHITE);
    // btn.setBackgroundResource (R.drawable.sample_2);
    // btn.setBackgroundColor (Color.BLACK);
    btn.setHighlightColor(Color.GREEN);
    btn.setId(position);
    btn.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            // TODO Handle the click here

        }
    });
    return btn;

}

关于Android Gridview 和按钮 OnItemclick，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/11927651/