如何处理 ViewPager Tab 内的不同事件？

Question

我正在开发一个包含视图寻呼机的 android 项目。 MenuActivity的UI如下...

下面是查看寻呼机活动的代码...

MenuActivity.java

public class MenuActivity extends FragmentActivity implements ActionBar.TabListener {
private ViewPager viewPager;
private TabsPagerAdapter mAdapter;
private ActionBar actionBar;    
//  Tab titles
private String[] tabs;
private String[] category_id;

@SuppressLint("NewApi")
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_menu);     
    CommonFunctions.changeActionBar(getResources(),getActionBar());
    //  Initialization
    initializeFoodCatagories();
    viewPager = (ViewPager) findViewById(R.id.pager);
    actionBar = getActionBar();
    mAdapter = new TabsPagerAdapter(getSupportFragmentManager(), tabs, category_id, MenuActivity.this);     
    viewPager.setAdapter(mAdapter);
    actionBar.setHomeButtonEnabled(false);
    actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);

    viewPager.setOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() {
        @Override
        public void onPageSelected(int position) {
            actionBar.setSelectedNavigationItem(position);                
        }
    });     
    //Adding Tabs
    for (String tab_name : tabs) {
        actionBar.addTab(actionBar.newTab().setText(tab_name)
                .setTabListener(this));
    }
}   
private void initializeFoodCatagories() {
    GeneralHelper helper = new GeneralHelper();
    JSONObject json = helper.callWebService(getString(R.string.API_END_POINT) + "get_food_category");
    String total_items = helper.getValueFromJson(json, "TotalRecords");

    tabs = new String[Integer.parseInt(total_items)];       
    category_id = new String[Integer.parseInt(total_items)];

    if(!(total_items.equals("0"))) {
        try {
            final JSONArray jsonarray = json.getJSONArray("Response");
            for (int i = 0; i < jsonarray.length(); i++) {
                 JSONObject jsonobject = jsonarray.getJSONObject(i);                     
                 tabs[i] = jsonobject.getString("category_name").toString();                                                             
                 category_id[i] = jsonobject.getString("category_id").toString();
            }
        } catch (JSONException e) {
            e.printStackTrace();
        } 
    }       
}
@Override
public void onTabReselected(Tab tab, android.app.FragmentTransaction ft) {      
}
@Override
public void onTabSelected(Tab tab, android.app.FragmentTransaction ft) {        
}
@Override
public void onTabUnselected(Tab tab, android.app.FragmentTransaction ft) {
}}

TabsPagerAdapter.java

public class TabsPagerAdapter extends FragmentPagerAdapter {
String [] category_name;    
String [] category_id;
Activity context;   
public TabsPagerAdapter(FragmentManager fm, String[] category_name, String[] category_id, Activity context) {
    super(fm);
    this.category_name = category_name;
    this.category_id = category_id;
    this.context = context;
}     
@Override
public Fragment getItem(int index) {
    for(int i = 0; i < category_name.length; i++) {
        if(index==i) { 
            return new SwipeTabFragment(context, category_id[i]);                                                                           
        }
    }       
    return null;
} 
@Override
public int getCount() {
    // get item count - equal to number of tabs
    return category_name.length;
}}

SwipeTabFragment.java

public class SwipeTabFragment extends Fragment {
Activity context;   
ListView list;
private String[] item_name;
private String[] price_per_unit;
private String[] item_image;
private String category_id;
public SwipeTabFragment(Activity context, String category_id) {
    this.context = context;
    this.category_id = category_id;
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {     
    View rootView = inflater.inflate(R.layout.activity_items, container, false); 
    list = (ListView) rootView.findViewById(R.id.lstItems);
    initializeFoodItems(category_id);
    list.setAdapter(new ItemListAdapter(context, item_name, price_per_unit));
    //ListView event handling
    //This event not working
    /*list.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
            Log.i("XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX","ListView activated");
        }
    });*/   
    //This event is also not working
    /*rootView.findViewById(R.id.imgPlus).setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Log.i("XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX","Plus Image Button activated");                
        }
    });*/
    return rootView;        
}       
private void initializeFoodItems(String position) {
    String url = getString(R.string.API_END_POINT) + "get_menu_items?food_cat_id="+position;

    GeneralHelper helper = new GeneralHelper();
    JSONObject json = helper.callWebService(url);

    String total_items = helper.getValueFromJson(json, "TotalRecords");
    price_per_unit = new String[Integer.parseInt(total_items)];
    item_name = new String[Integer.parseInt(total_items)];
    item_image = new String[Integer.parseInt(total_items)];


    if(!(total_items.equals("0"))) {
        try {
            final JSONArray jsonarray = json.getJSONArray("Response");
            for (int i = 0; i < jsonarray.length(); i++) {
                 JSONObject jsonobject = jsonarray.getJSONObject(i);
                 price_per_unit[i] = jsonobject.getString("price_per_unit").toString();
                 item_name[i] = jsonobject.getString("item_name").toString();                                        
                 item_image[i] = jsonobject.getString("item_image").toString();                  
            }
        } catch (JSONException e) {
            e.printStackTrace();
        } 
    }       
}}

ItemListAdapter.java

public class ItemListAdapter extends ArrayAdapter<String> { 
static int grand_total;
private final Activity context; 
private final String title[];
private final String price[];
private final String discount[];    
public ItemListAdapter(Activity context, String[] title, String[] price,     String[] discount) {
    super(context, R.layout.item_list, title);
    this.context = context;
    this.title = title;
    this.price = price;
    this.discount = discount;
}       
@SuppressLint({ "ViewHolder", "InflateParams" })
@Override
public View getView(int position, View view, ViewGroup parent) {
    LayoutInflater inflater = context.getLayoutInflater();
    final View row = inflater.inflate(R.layout.item_list, null,true);       
    ((TextView) row.findViewById(R.id.txtTitl)).setText(title[position]);
   final int item_price = Integer.parseInt(price[position]);
   ((TextView) row.findViewById(R.id.txtPrice)).setText(price[position] + " Rs. Each");
    ((TextView) row.findViewById(R.id.txtDiscount)).setText(discount[position] + "%");
    RatingBar ratingBar = (RatingBar) row.findViewById(R.id.ratingBar);
    LayerDrawable stars = (LayerDrawable) ratingBar.getProgressDrawable();
 stars.getDrawable(2).setColorFilter(row.getResources().getColor(R.color.orange),     PorterDuff.Mode.SRC_ATOP);         
    //Increasing Quantity
    row.findViewById(R.id.imgPlus).setOnClickListener(new  View.OnClickListener() {
    @Override
    public void onClick(View v) {
        TextView qty = (TextView) row.findViewById(R.id.txtQty);
        qty.setText(String.valueOf((Integer.parseInt(qty.getText().toString()))+1));
        if (Integer.parseInt(qty.getText().toString()) > 0) {               
            //Calculating Total Amount
            int t = item_price * Integer.parseInt(qty.getText().toString());
            ((TextView) row.findViewById(R.id.txtTotal)).setText("Rs. " + String.valueOf(t));                   
        }
    }
    });     
    //Decreasing Quantity       
    row.findViewById(R.id.imgMinus).setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
        TextView qty = (TextView) row.findViewById(R.id.txtQty);
        if (Integer.parseInt(qty.getText().toString()) > 0) {                   
            qty.setText(String.valueOf((Integer.parseInt(qty.getText().toString()))-1));
            //Calculating Total Amount
            int t = item_price * Integer.parseInt(qty.getText().toString());
            ((TextView) row.findViewById(R.id.txtTotal)).setText("Rs. " + String.valueOf(t));               
        }               
    }
    });     
    return row;     
}
}

activity.menu.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.view.ViewPager xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/pager"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
</android.support.v4.view.ViewPager>

activity_items.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal"
    android:background="@drawable/activity_background">
    <ListView 
        android:id="@+id/lstItems"
        android:layout_height="wrap_content"
        android:layout_width="match_parent"
        android:background="@drawable/listview_design"/>           
</RelativeLayout>

item_list.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:background="@drawable/listview_design"
android:padding="5dp"
android:layout_margin="5dp" >
<TextView
    android:id="@+id/txtTitl"
    style="@style/ListViewHeader"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentRight="true"
    android:layout_alignParentTop="true"
    android:layout_marginLeft="8dp"
    android:layout_toRightOf="@+id/imgIcon"
    android:gravity="left"
    android:text="@string/itemname"
    android:textAppearance="?android:attr/textAppearanceMedium" />

<ImageView
    android:id="@+id/imgIcon"
    android:layout_width="80dp"
    android:layout_height="80dp"
    android:contentDescription="@string/img_desp"
    android:src="@drawable/food_item_thumb" />

<RatingBar
    android:id="@+id/ratingBar"
    style="?android:attr/ratingBarStyleSmall"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignBottom="@+id/imgIcon"
    android:layout_alignLeft="@+id/imgIcon"
    android:background="#80FF0000"
    android:numStars="5"
    android:paddingBottom="5dp"
    android:rating="3.5" />

<TextView
    android:id="@+id/txtPrice"
    style="@style/ListViewBottomText"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignLeft="@+id/txtTitl"
    android:layout_below="@+id/txtTitl"
    android:paddingTop="0dp"
    android:text="@string/price_tag"
    android:textAppearance="?android:attr/textAppearanceMedium"
     />

<RelativeLayout
    android:id="@+id/relativeLayout1"
    android:layout_width="match_parent"
    android:layout_height="25dp"
    android:layout_alignBottom="@+id/imgIcon"
    android:layout_alignLeft="@+id/txtPrice"
    android:layout_alignTop="@+id/ratingBar" >

    <ImageButton
        android:id="@+id/imgPlus"
        android:layout_width="25dp"
        android:layout_height="match_parent"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:background="@drawable/sqr_plus"
        android:contentDescription="@string/img_desp" />

    <ImageButton
        android:id="@+id/imgMinus"
        android:layout_width="25dp"
        android:layout_height="match_parent"
        android:layout_alignBottom="@+id/imgPlus"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:background="@drawable/sqr_minus"
        android:contentDescription="@string/img_desp" />

    <TextView
        android:id="@+id/txtQty"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_toLeftOf="@+id/imgPlus"
        android:layout_toRightOf="@+id/imgMinus"
        android:gravity="center_horizontal|center_vertical"
        android:text="@string/qty"
        android:textColor="#808080"
        android:textSize="20sp" />

    <TextView
        android:id="@+id/TextView01"
        style="@style/ListViewBottomText"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentRight="true"
        android:layout_alignParentTop="true"
        android:gravity="center_horizontal|center_vertical"
        android:paddingBottom="0dp"
        android:paddingTop="0dp"
        android:text="@string/total"
        android:textColor="#AC2A2E"
        android:textSize="20sp" />

</RelativeLayout>

<ImageView
    android:id="@+id/imgDiscount"
    android:layout_width="30dp"
    android:layout_height="40dp"
    android:layout_alignRight="@+id/txtTitl"
    android:layout_alignTop="@+id/txtTitl"
    android:background="@drawable/label"
    android:contentDescription="@string/img_desp" />

</RelativeLayout>

我想我已经提供了足够的信息来理解这个问题。 GeneralHelper 是一项 Web 服务 class，用于从服务器获取 JSON 数据。在这里，我想获取用户的订单详细信息。但是我面临着以下一些问题...

列表项不可点击，当我放置事件处理代码时，它不起作用
如何处理放置在ListView项中的ImageButton(imgPlus和(imgMinus))的onClick事件。我尝试了SwipeTabFragment.java中注释中写的代码，但它也不起作用。
最后一个问题是，当我们向左或向右滑动时，标签切换得很好，但是如果我们点击标签，则无法切换。

请帮我解决以上问题或其中任何一个。谢谢！

Answer 1

您在 onCreateView

中故意评论了 ListView 的 onItemclicklistener

取消注释代码

  @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {     
        View rootView = inflater.inflate(R.layout.activity_items, container, false); 
        list = (ListView) rootView.findViewById(R.id.lstItems);
        initializeFoodItems(category_id);
        list.setAdapter(new ItemListAdapter(context, item_name, price_per_unit));
        //ListView event handling



      list.setOnItemClickListener(itemClickListener );

        return rootView;        
    }

ImageVIew 点击

在任何地方写这个方法

 // Item Click Listener for the listview
        OnItemClickListener itemClickListener = new OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View container, int position, long id) {
                // Getting the Container Layout of the ListView
                RelativeLayout linearLayoutParent = (RelativeLayout ) container;

                // Getting the inner Linear Layout
                RelativeLayout linearLayoutChild = (RelativeLayout ) linearLayoutParent.getChildAt(1);

                // Getting the Country TextView
                ImageView iv = (ImageView) linearLayoutChild.getChildAt(0);

                Toast.makeText(getBaseContext(), "Image CLicked", Toast.LENGTH_SHORT).show();
            }
        };

Answer 2

线性布局的使用方法：

activity_main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:gravity="center" >

<ScrollView
    android:id="@+id/scrollView1"
    android:layout_width="match_parent"
    android:layout_height="400dp" >

    <LinearLayout
        android:id="@+id/layout1"
        android:layout_width="match_parent"
        android:layout_height="200dp"
        android:orientation="vertical" >
    </LinearLayout>
</ScrollView>

</RelativeLayout>

prompts.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/layout_root"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
android:padding="10dp" >

<TextView
    android:id="@+id/textView1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Type Your Name : "
    android:textAppearance="?android:attr/textAppearanceLarge" />

<EditText
    android:id="@+id/editTextDialogUserInput"
    android:layout_width="match_parent"
    android:layout_height="wrap_content" >

    <requestFocus />

</EditText>

</LinearLayout>

row.xml

<?xml version="1.0" encoding="UTF-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >

<LinearLayout
    android:id="@+id/layoutbg"
    android:layout_width="fill_parent"
    android:layout_height="70dp"
    android:orientation="horizontal" >

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="fill_parent"
        android:layout_weight="1"
        android:gravity="center"
        android:orientation="vertical" >

        <ImageView
            android:id="@+id/img"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:src="@drawable/ic_launcher" />
    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="fill_parent"
        android:layout_weight="1"
        android:gravity="center"
        android:orientation="vertical" >

        <TextView
            android:id="@+id/name"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="TextView" />
    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="fill_parent"
        android:layout_weight="1"
        android:gravity="center"
        android:orientation="vertical" >

        <TextView
            android:id="@+id/num"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="TextView" />
    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="fill_parent"
        android:layout_weight="1"
        android:gravity="center"
        android:orientation="vertical" >

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

</LinearLayout>

MainActivity.java

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import com.example.bean.FriendBean;

import android.os.Bundle;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.View.OnTouchListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends Activity {
private LinearLayout mList;
private ArrayList<FriendBean> arr = new ArrayList<FriendBean>();
int loader = R.drawable.loader;
int i;
String val;

// public LayoutInflater inflater;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    mList = (LinearLayout) findViewById(R.id.layout1);

    final ImageLoader img = new ImageLoader(getApplicationContext());

    StringBuffer sb = new StringBuffer();
    BufferedReader br = null;

    try {
        br = new BufferedReader(new InputStreamReader(getAssets().open(
                "jsonarray.json")));
        String temp;
        while ((temp = br.readLine()) != null)
            sb.append(temp);
    } catch (IOException e1) {
        // TODO Auto-generated catch block
        e1.printStackTrace();
    } finally {
        try {
            br.close(); // stop reading
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
    String myjsonstring = sb.toString();

    try {
        JSONObject obj = new JSONObject(myjsonstring);
        JSONArray jsonarray = obj.getJSONArray("json");
        Log.e("Length", "" + jsonarray.length());
        for (i = 0; i < jsonarray.length(); i++) {
            JSONObject jsonObj = jsonarray.getJSONObject(i);
            String friend_name = jsonObj.getString("friend_name");
            String friend_phone = jsonObj.getString("friend_phone");
            String url = jsonObj.getString("image_url");
            FriendBean bean = new FriendBean(url, friend_name, friend_phone);
            arr.add(bean);
            Log.e("u", url);
            Log.e("friend_name", friend_name);
            Log.e("friend_phone", friend_phone);

            LayoutInflater vi = (LayoutInflater) getApplicationContext()
                    .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            final View v = vi.inflate(R.layout.row, null);

            final ImageView im = (ImageView) v.findViewById(R.id.img);
            final TextView t1 = (TextView) v.findViewById(R.id.name);
            final TextView t2 = (TextView) v.findViewById(R.id.num);
            final Button del = (Button) v.findViewById(R.id.del);
            img.DisplayImage(url, loader, im);
            t1.setText(friend_name);
            t2.setText(String.valueOf(i));
            mList.addView(v);

            t1.setOnClickListener(new OnClickListener() {

                @Override
                public void onClick(View v) {
                    // TODO Auto-generated method stub
                    LayoutInflater li = LayoutInflater.from(MainActivity.this);
                    View promptsView = li.inflate(R.layout.prompts, null);

                    AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(
                            MainActivity.this);

                    // set prompts.xml to alertdialog builder
                    alertDialogBuilder.setView(promptsView);

                    final EditText userInput = (EditText) promptsView
                            .findViewById(R.id.editTextDialogUserInput);

                    userInput.setText(t1.getText().toString());

                    // set dialog message
                    alertDialogBuilder
                            .setCancelable(false)
                            .setPositiveButton("OK",
                                    new DialogInterface.OnClickListener() {
                                        public void onClick(DialogInterface dialog,
                                                int id) {
                                            // get user input and set it to
                                            // result
                                            // edit text
                                            int f = Integer.parseInt(t2.getText()
                                                    .toString());
                                            Toast.makeText(getApplicationContext(),
                                                    "Position " + f, Toast.LENGTH_SHORT)
                                                    .show();
                                            val = userInput.getText().toString();
                                            Toast.makeText(getApplicationContext(),
                                                    val, Toast.LENGTH_SHORT).show();
                                            t1.setText(val);
                                            // mList.addView(v1);
                                            del.setOnClickListener(new OnClickListener() {

                                                @Override
                                                public void onClick(View v) {
                                                    // TODO Auto-generated
                                                    // method
                                                    // stub
                                                    Toast.makeText(
                                                            getApplicationContext(),
                                                            "Previously "
                                                                    + mList.getChildCount(),
                                                            Toast.LENGTH_SHORT).show();
                                                    int f = Integer.parseInt(t2.getText()
                                                            .toString());
                                                    mList.removeViewAt(f);
                                                    Toast.makeText(
                                                            getApplicationContext(),
                                                            "Position "
                                                                    + t1.getText().toString(),
                                                            Toast.LENGTH_SHORT).show();
                                                    myFunction(mList);

                                                }
                                            });
                                        }
                                    })
                            .setNegativeButton("Cancel",
                                    new DialogInterface.OnClickListener() {
                                        public void onClick(DialogInterface dialog,
                                                int id) {
                                            dialog.cancel();
                                        }
                                    });

                    // create alert dialog
                    AlertDialog alertDialog = alertDialogBuilder.create();

                    // show it
                    alertDialog.show();
                    Log.e("MSG", "HI");
                }
            });

            del.setOnClickListener(new OnClickListener() {

                @Override
                public void onClick(View v) {
                    // TODO Auto-generated method stub
                    Toast.makeText(getApplicationContext(),
                            "Previously " + mList.getChildCount(),
                            Toast.LENGTH_SHORT).show();
                    int f = Integer.parseInt(t2.getText().toString());
                    mList.removeViewAt(f);
                    Toast.makeText(getApplicationContext(), "Position " + f,
                            Toast.LENGTH_SHORT).show();
                    myFunction(mList);
                }
            });

            im.setOnTouchListener(new OnTouchListener() {

                @Override
                public boolean onTouch(View arg0, MotionEvent arg1) {
                    // TODO Auto-generated method stub
                    Toast.makeText(getApplicationContext(),
                            t1.getText().toString(), Toast.LENGTH_SHORT).show();

                    return false;
                }
            });

        }

    } catch (JSONException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

}

public void myFunction(LinearLayout l) {
    LayoutInflater vi = (LayoutInflater) getApplicationContext()
            .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    View v = vi.inflate(R.layout.row, null);

    int c = l.getChildCount();
    for (int j = 0; j < c; j++) {
        v = l.getChildAt(j);
        TextView t2 = (TextView) v.findViewById(R.id.num);
        t2.setText(String.valueOf(j));
    }
    Toast.makeText(getApplicationContext(), "Finally " + c,
            Toast.LENGTH_SHORT).show();

}
}

jsonarray.json（将其放在资产文件夹中）

{ "json" : [ { "image_url" : "http://www.ogmaconceptions.com/demo/NewsFeed/app_images/twitter_main.png",
    "friend_name" : "Madhumoy",
    "friend_phone" : "123"
  },
  { "image_url" : "http://www.ogmaconceptions.com/demo/NewsFeed/app_images/twitter_main.png",
    "friend_name" : "Sattik",
    "friend_phone" : "123"
  },
  { "image_url" : "http://www.ogmaconceptions.com/demo/NewsFeed/app_images/twitter_main.png",
    "friend_name" : "Koushik",
    "friend_phone" : "123"
  },
  { "image_url" : "http://www.ogmaconceptions.com/demo/NewsFeed/app_images/twitter_main.png",
    "friend_name" : "Himanshu",
    "friend_phone" : "123"
  },
  { "image_url" : "http://www.ogmaconceptions.com/demo/NewsFeed/app_images/twitter_main.png",
    "friend_name" : "Sandy",
    "friend_phone" : "123"
  }
] }

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.customlist"
android:versionCode="1"
android:versionName="1.0" >

<uses-sdk
    android:minSdkVersion="8"
    android:targetSdkVersion="10" />
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

<application
    android:allowBackup="true"
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme" >
    <activity
        android:name="com.example.customlist.MainActivity"
        android:label="@string/app_name" >
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
</application>

</manifest>

FriendBean.java

public class FriendBean {
private String Image;
private String name;
private String ph;

public FriendBean(String Image,String name,String ph){
    this.Image = Image;
    this.name = name;
    this.ph = ph;

}

public String getImage() {
    return Image;
}

public void setImage(String image) {
    Image = image;
}

public String getName() {
    return name;
}

public void setName(String name) {
    this.name = name;
}

public String getPh() {
    return ph;
}

public void setPh(String ph) {
    this.ph = ph;
}



}

避免使用 ImageLoader class。我希望您可以显示来自 URL 的图像。如果你能做到，那么只需使用你的方法将图像从 URL 显示到 im ImageView...

只需使用这些文件创建一个新项目，您就会明白这一点..

Answer 3

我得到了两个问题的解决方案。那是...

如何处理放置在ListView项中的ImageButton(imgPlus和imgMinus)的onClick事件。我尝试使用 SwipeTabFragment.java 中注释中编写的代码，但它也不起作用。

解决方案： 我正在处理 ItemListAdapter.java 中的 onclick 事件，它工作正常。下面是这个文件的代码。这可能对其他人有帮助。

import android.annotation.SuppressLint;
import android.app.Activity;
import android.graphics.PorterDuff;
import android.graphics.drawable.LayerDrawable;
import android.view.View;
import android.view.ViewGroup;
import android.view.LayoutInflater;
import android.widget.ArrayAdapter;
import android.widget.RatingBar;
import android.widget.TextView;
public class ItemListAdapter extends ArrayAdapter<String> { 
static int grand_total;
private final Activity context; 
private final String title[];
private final String price[];
private final String discount[];    
public ItemListAdapter(Activity context, String[] title, String[] price, String[] discount) {
    super(context, R.layout.item_list, title);
    this.context = context;
    this.title = title;
    this.price = price;
    this.discount = discount;
}       
@SuppressLint({ "ViewHolder", "InflateParams" })
@Override
public View getView(int position, View view, ViewGroup parent) {
    LayoutInflater inflater = context.getLayoutInflater();
    final View row = inflater.inflate(R.layout.item_list, null,true);       
    ((TextView) row.findViewById(R.id.txtTitl)).setText(title[position]);
    final int item_price = Integer.parseInt(price[position]);
    ((TextView) row.findViewById(R.id.txtPrice)).setText(price[position] + " Rs. Each");
    ((TextView) row.findViewById(R.id.txtDiscount)).setText(discount[position] + "%");
    RatingBar ratingBar = (RatingBar) row.findViewById(R.id.ratingBar);
    LayerDrawable stars = (LayerDrawable) ratingBar.getProgressDrawable();
    stars.getDrawable(2).setColorFilter(row.getResources().getColor(R.color.orange), PorterDuff.Mode.SRC_ATOP);         
    //Increasing Quantity
    row.findViewById(R.id.imgPlus).setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            TextView qty = (TextView) row.findViewById(R.id.txtQty);
            qty.setText(String.valueOf((Integer.parseInt(qty.getText().toString()))+1));
            if (Integer.parseInt(qty.getText().toString()) > 0) {               
                //Calculating Total Amount
                int t = item_price * Integer.parseInt(qty.getText().toString());
                ((TextView) row.findViewById(R.id.txtTotal)).setText("Rs. " + String.valueOf(t));                   
            }
        }
    });     
    //Decreasing Quantity       
    row.findViewById(R.id.imgMinus).setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            TextView qty = (TextView) row.findViewById(R.id.txtQty);
            if (Integer.parseInt(qty.getText().toString()) > 0) {                   
                qty.setText(String.valueOf((Integer.parseInt(qty.getText().toString()))-1));
                //Calculating Total Amount
                int t = item_price * Integer.parseInt(qty.getText().toString());
                ((TextView) row.findViewById(R.id.txtTotal)).setText("Rs. " + String.valueOf(t));               
            }               
        }
    });     
    return row;     
}
}

当我们向左或向右滑动时，标签切换得很好，但是如果我们点击标签，则无法切换。

解决方案： 我只是将以下行放在 onTabSelected() 中并使选项卡工作。这是@AvishekDas 建议的。再次感谢。

@Override
public void onTabSelected(Tab tab, android.app.FragmentTransaction ft) {        
    viewPager.setCurrentItem(tab.getPosition());
}

But I'm still finding problem 1. My listView is not clickable. If any of you have solution then please post. Thank you!

如何处理 ViewPager Tab 内的不同事件？

How to handle different events inside ViewPager Tab?

android

event-handling

android-listview

android-viewpager

android-tabs