无法在android列表视图中实现ClickListener

Question

你好，我正在处理一个android项目，我正在使用列表视图列出默认实体。我的android代码是这样的，我可以使用伪造的代码获得项目列表，但我无法实现onclicklisaner。如果列表项目被点击，我希望出现一个消息框，而我无法做到

package com.example.policadda;
public class Help {
	private String title;
	private String address;
	private int iconID;
	private String phonenumber;
	private int callbutton;
	
	public Help(String title, String address, int iconID ,String phonenumber) {
		super();
		this.title = title;
		this.address = address;
		this.iconID = iconID;
		this.phonenumber= phonenumber;
		
	}
	public String getTitle() {
		return title;
	}
	public String getAddress() {
		return address;
	}
	public int getIconID() {
		return iconID;
	}
	public String getphonenumber() {
		return phonenumber;
	}
}

package com.example.policadda;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.widget.Filter;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;
public class MainHelp extends Activity  {
	EditText inputSearch;
	TextView txtphonenumber;
	ArrayList<HashMap<String, String>> productList;
private List<Help> myhelp = new ArrayList<Help>();
@Override
protected void onCreate(Bundle savedInstanceState) {
	// TODO Auto-generated method stub
	super.onCreate(savedInstanceState);
	setContentView(R.layout.help);
	inputSearch = (EditText) findViewById(R.id.inputSearch);
	populateComplaintList();
	ArrayAdapter<Help> adapter = new MyListAdapter();
	ListView List = (ListView) findViewById(R.id.helplistview);
	List.setAdapter(adapter);
	     
}

private void populateComplaintList() {
	// TODO Auto-generated method stub
	myhelp.add(new Help("kalasipalya","#12 subramanyapura mainroad",R.drawable.administration1,"7760576191"));
	myhelp.add(new Help("kormangala","#12 subramanyapura mainroad",R.drawable.businessman157,"7760576191"));
	myhelp.add(new Help("raghuvanahali","#12 subramanyapura mainroad",R.drawable.businessman158,"7760576191"));
	myhelp.add(new Help("konankunte","#12 subramanyapura mainroad",R.drawable.administration1,"7760576191"));
	myhelp.add(new Help("thatguni","#12 subramanyapura mainroad",R.drawable.administration1,"7760576191"));
	myhelp.add(new Help("mayurilayout","#12 subramanyapura mainroad",R.drawable.administration1,"7760576191"));
	myhelp.add(new Help("chunchghatta","#12 subramanyapura mainroad",R.drawable.administration1,"7760576191"));
	
}
private class MyListAdapter extends ArrayAdapter<Help>{
	public MyListAdapter(){
		super(MainHelp.this , R.layout.helpdesing , myhelp);
		
	}
	
	@Override
	public View getView(int position, View convertView, ViewGroup parent) {
		View itemView = convertView;
		
	
		if(itemView== null){
			itemView = getLayoutInflater().inflate(R.layout.helpdesing, parent,false);
		}
		
		 Help currenthelp = myhelp.get(position);
		 ImageView imageview = (ImageView) itemView.findViewById(R.id.item_icon);
		 imageview.setImageResource(currenthelp.getIconID());
		 
		 TextView maketext = (TextView)  itemView.findViewById(R.id.item_textTitle);
		 maketext.setText(currenthelp.getTitle());
		 
		 TextView makeaddress= (TextView)  itemView.findViewById(R.id.txtaddress);
		 makeaddress.setText(currenthelp.getAddress());
		 
		 TextView makephonenumber =(TextView) itemView.findViewById(R.id.txtphonenumber);
		 makephonenumber.setText(currenthelp.getphonenumber());
		
		return itemView;
	}
	
}
}

Answer 1

试试这个；在适配器类中的getview方法之后创建click监听器

    public OnItemClickListener onItemClick = new OnItemClickListener() {
    @Override
    public void onItemClick(AdapterView<?> arg0, View v, int position,
            long arg3) {
         Toast.makeText(v.getContext(), String.valueOf(position), Toast.LENGTH_SHORT).Show();
    }
};

并将监听器设置如下，

    MyListAdapter adapter = new MyListAdapter();
    ListView list = (ListView) findViewById(R.id.action_settings);
    list.setAdapter(adapter);
    list.setOnItemClickListener(adapter.onItemClick);   

Answer 2

Android SDK中ApiDemos中的class Transition3d展示了如何创建项目点击监听器并在Listview小部件中使用它。看一看"mPhotosList.setOnItemClickListener（this）；"

package com.example.android.apis.animation;
import com.example.android.apis.R;
import android.app.Activity;
import android.os.Bundle;
import android.widget.ListView;
import android.widget.ArrayAdapter;
import android.widget.AdapterView;
import android.widget.ImageView;
import android.view.View;
import android.view.ViewGroup;
import android.view.animation.Animation;
import android.view.animation.AccelerateInterpolator;
import android.view.animation.DecelerateInterpolator;
/**
 * This sample application shows how to use layout animation and various
 * transformations on views. The result is a 3D transition between a
 * ListView and an ImageView. When the user clicks the list, it flips to
 * show the picture. When the user clicks the picture, it flips to show the
 * list. The animation is made of two smaller animations: the first half
 * rotates the list by 90 degrees on the Y axis and the second half rotates
 * the picture by 90 degrees on the Y axis. When the first half finishes, the
 * list is made invisible and the picture is set visible.
 */
public class Transition3d extends Activity implements
        AdapterView.OnItemClickListener, View.OnClickListener {
    private ListView mPhotosList;
    private ViewGroup mContainer;
    private ImageView mImageView;
    // Names of the photos we show in the list
    private static final String[] PHOTOS_NAMES = new String[] {
            "Lyon",
            "Livermore",
            "Tahoe Pier",
            "Lake Tahoe",
            "Grand Canyon",
            "Bodie"
    };
    // Resource identifiers for the photos we want to display
    private static final int[] PHOTOS_RESOURCES = new int[] {
            R.drawable.photo1,
            R.drawable.photo2,
            R.drawable.photo3,
            R.drawable.photo4,
            R.drawable.photo5,
            R.drawable.photo6
    };
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.animations_main_screen);
        mPhotosList = (ListView) findViewById(android.R.id.list);
        mImageView = (ImageView) findViewById(R.id.picture);
        mContainer = (ViewGroup) findViewById(R.id.container);
        // Prepare the ListView
        final ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
                android.R.layout.simple_list_item_1, PHOTOS_NAMES);
        mPhotosList.setAdapter(adapter);
        mPhotosList.setOnItemClickListener(this);
        // Prepare the ImageView
        mImageView.setClickable(true);
        mImageView.setFocusable(true);
        mImageView.setOnClickListener(this);
        // Since we are caching large views, we want to keep their cache
        // between each animation
        mContainer.setPersistentDrawingCache(ViewGroup.PERSISTENT_ANIMATION_CACHE);
    }
    /**
     * Setup a new 3D rotation on the container view.
     *
     * @param position the item that was clicked to show a picture, or -1 to show the list
     * @param start the start angle at which the rotation must begin
     * @param end the end angle of the rotation
     */
    private void applyRotation(int position, float start, float end) {
        // Find the center of the container
        final float centerX = mContainer.getWidth() / 2.0f;
        final float centerY = mContainer.getHeight() / 2.0f;
        // Create a new 3D rotation with the supplied parameter
        // The animation listener is used to trigger the next animation
        final Rotate3dAnimation rotation =
                new Rotate3dAnimation(start, end, centerX, centerY, 310.0f, true);
        rotation.setDuration(500);
        rotation.setFillAfter(true);
        rotation.setInterpolator(new AccelerateInterpolator());
        rotation.setAnimationListener(new DisplayNextView(position));
        mContainer.startAnimation(rotation);
    }
    public void onItemClick(AdapterView<?> parent, View v, int position, long id) {
        // Pre-load the image then start the animation
        mImageView.setImageResource(PHOTOS_RESOURCES[position]);
        applyRotation(position, 0, 90);
    }
    public void onClick(View v) {
        applyRotation(-1, 180, 90);
    }
    /**
     * This class listens for the end of the first half of the animation.
     * It then posts a new action that effectively swaps the views when the container
     * is rotated 90 degrees and thus invisible.
     */
    private final class DisplayNextView implements Animation.AnimationListener {
        private final int mPosition;
        private DisplayNextView(int position) {
            mPosition = position;
        }
        public void onAnimationStart(Animation animation) {
        }
        public void onAnimationEnd(Animation animation) {
            mContainer.post(new SwapViews(mPosition));
        }
        public void onAnimationRepeat(Animation animation) {
        }
    }
    /**
     * This class is responsible for swapping the views and start the second
     * half of the animation.
     */
    private final class SwapViews implements Runnable {
        private final int mPosition;
        public SwapViews(int position) {
            mPosition = position;
        }
        public void run() {
            final float centerX = mContainer.getWidth() / 2.0f;
            final float centerY = mContainer.getHeight() / 2.0f;
            Rotate3dAnimation rotation;
            if (mPosition > -1) {
                mPhotosList.setVisibility(View.GONE);
                mImageView.setVisibility(View.VISIBLE);
                mImageView.requestFocus();
                rotation = new Rotate3dAnimation(90, 180, centerX, centerY, 310.0f, false);
            } else {
                mImageView.setVisibility(View.GONE);
                mPhotosList.setVisibility(View.VISIBLE);
                mPhotosList.requestFocus();
                rotation = new Rotate3dAnimation(90, 0, centerX, centerY, 310.0f, false);
            }
            rotation.setDuration(500);
            rotation.setFillAfter(true);
            rotation.setInterpolator(new DecelerateInterpolator());
            mContainer.startAnimation(rotation);
        }
    }
}

Answer 3

设置适配器后，只需在OnCreate方法中复制以下代码

List.setOnItemClickListener(new OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view,
                    int position, long id) {
                Toast.makeText(view.getContext(), String.valueOf(position), Toast.LENGTH_LONG).Show();
            }
        });