如何在GridView中动态创建ImageButtons

Question

我试图在GridView的内部动态创建ImageButtons，但由于某些原因，它们显示为字符串（如下所示）。我看了几个帖子，但我仍然不确定这个问题。除了xml文件外，我还附加了我的代码。

全部活动：

package com.example.myname.myproject; 

import android.app.AlertDialog; 
import android.content.DialogInterface; 
import android.graphics.Color; 
import android.support.design.widget.TabLayout; 
import android.support.v7.app.AppCompatActivity; 
import android.support.v7.widget.Toolbar; 

import android.support.v4.app.Fragment; 
import android.support.v4.app.FragmentManager; 
import android.support.v4.app.FragmentPagerAdapter; 
import android.support.v4.view.ViewPager; 
import android.os.Bundle; 
import android.text.InputType; 
import android.util.Log; 
import android.view.LayoutInflater; 
import android.view.Menu; 
import android.view.MenuItem; 
import android.view.View; 
import android.view.ViewGroup; 

import android.widget.ArrayAdapter; 
import android.widget.EditText; 
import android.widget.GridLayout; 
import android.widget.GridView; 
import android.widget.ImageButton; 
import android.widget.ListAdapter; 
import android.widget.Spinner; 
import android.widget.TextView; 

import java.util.ArrayList; 
import java.util.List; 
import java.util.StringTokenizer; 

import static com.example.myname.myproject.R.id.templateGrid; 

//import com.example.myname.myproject.R; 

public class AdminControlTabbed extends AppCompatActivity { 

    /** 
    * The {@link android.support.v4.view.PagerAdapter} that will provide 
    * fragments for each of the sections. We use a 
    * {@link FragmentPagerAdapter} derivative, which will keep every 
    * loaded fragment in memory. If this becomes too memory intensive, it 
    * may be best to switch to a 
    * {@link android.support.v4.app.FragmentStatePagerAdapter}. 
    */ 
    private SectionsPagerAdapter mSectionsPagerAdapter; 

    /** 
    * The {@link ViewPager} that will host the section contents. 
    */ 
    private ViewPager mViewPager; 
    List<String> options = new ArrayList<String>(); 
    String message; 
    Spinner s; 
    static String [] templateIcons = {"followfacebook", "followtwitter"}; 
    static int [] templateResources = {R.drawable.facebookblock, R.drawable.twitterblock}; 
    String [] defaultIcons = {"sendtext", "sendlink", "sendphone"}; 
    int [] defaultResources = {R.drawable.textblock, R.drawable.linkblock, R.drawable.callblock}; 
    static List <ImageButton> templateIButtons = new ArrayList<ImageButton>(); 
    List <ImageButton> defaultIButtons = new ArrayList<ImageButton>(); 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_admin_control_tabbed); 

     Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar); 
     toolbar.setTitle("My Project"); 
     setSupportActionBar(toolbar); 
     // Create the adapter that will return a fragment for each of the three 
     // primary sections of the activity. 
     mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager()); 

     // Set up the ViewPager with the sections adapter. 
     mViewPager = (ViewPager) findViewById(R.id.container); 
     mViewPager.setAdapter(mSectionsPagerAdapter); 

     TabLayout tabLayout = (TabLayout) findViewById(R.id.tabs); 
     tabLayout.setupWithViewPager(mViewPager); 


     List<String> channels = new ArrayList<String>(); 
     channels.add("Channel 1"); 
     channels.add("Channel 2"); 
     channels.add("Channel 3"); 
     s = (Spinner) findViewById(R.id.channelselector); 
     ArrayAdapter a = new ArrayAdapter(this, android.R.layout.simple_spinner_item, channels); 
     s.setAdapter(a); 
     /*ImageButton linkButton = (ImageButton) findViewById(R.id.sendLink); 
     linkButton.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       showMessageInput(2); 
      } 
     }); 
     ImageButton textButton = (ImageButton) findViewById(R.id.sendText); 
     textButton.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       showMessageInput(1); 
      } 
     }); 
     ImageButton callButton = (ImageButton) findViewById(R.id.sendCall); 
     callButton.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       showMessageInput(0); 
      } 
     });*/ 
    } 


    public void sendMessage(int position, String message){ 
     StringTokenizer t = new StringTokenizer(s.getSelectedItem().toString()); 
     t.nextToken(); 
     String channel = (t.nextToken()); 
     if (position == 0){ 
      try{new FirebaseSendMessage().execute(channel, "Phone | " + message + "&" + channel);} 
      catch (Exception e) { 
       Log.d("Exception", e.toString()); 
      } 
     } 
     if (position == 1){ 
      try{new FirebaseSendMessage().execute(channel, "Banner | " + message + "&" + channel);} 
      catch (Exception e) { 
       Log.d("Exception", e.toString()); 
      } 
     } 
     if (position == 2){ 
      try{new FirebaseSendMessage().execute(channel, "Link | " + message + "&" + channel);} 
      catch (Exception e) { 
       Log.d("Exception", e.toString()); 
      } 
     } 
    } 

    public void showMessageInput(final int position){ 
     AlertDialog.Builder builder = new AlertDialog.Builder(AdminControlTabbed.this); 
     builder.setTitle("Message Information"); 

     final EditText input = new EditText(AdminControlTabbed.this); 
     input.setInputType(InputType.TYPE_CLASS_TEXT); 
     builder.setView(input); 

     builder.setPositiveButton("Send", new DialogInterface.OnClickListener() { 
      @Override 
      public void onClick(DialogInterface dialog, int which) { 
       message = input.getText().toString(); 
       sendMessage(position, message); 
      } 
     }); 
     builder.show(); 
     builder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() { 
      @Override 
      public void onClick(DialogInterface dialog, int which) { 
       dialog.cancel(); 
      } 
     }); 
    } 


    /*@Override 
    public boolean onCreateOptionsMenu(Menu menu) { 
     // Inflate the menu; this adds items to the action bar if it is present. 
     getMenuInflater().inflate(R.menu.menu_admin_control_tabbed, menu); 
     return true; 
    } 

    @Override 
    public boolean onOptionsItemSelected(MenuItem item) { 
     // Handle action bar item clicks here. The action bar will 
     // automatically handle clicks on the Home/Up button, so long 
     // as you specify a parent activity in AndroidManifest.xml. 
     int id = item.getItemId(); 

     //noinspection SimplifiableIfStatement 
     if (id == R.id.action_settings) { 
      return true; 
     } 

     return super.onOptionsItemSelected(item); 
    }*/ 

    /** 
    * A placeholder fragment containing a simple view. 
    */ 
    public static class PlaceholderFragment extends Fragment { 
     /** 
     * The fragment argument representing the section number for this 
     * fragment. 
     */ 
     private static final String ARG_SECTION_NUMBER = "section_number"; 

     public PlaceholderFragment() { 
     } 

     /** 
     * Returns a new instance of this fragment for the given section 
     * number. 
     */ 
     public static PlaceholderFragment newInstance(int sectionNumber) { 
      PlaceholderFragment fragment = new PlaceholderFragment(); 
      Bundle args = new Bundle(); 
      args.putInt(ARG_SECTION_NUMBER, sectionNumber); 
      fragment.setArguments(args); 

      return fragment; 
     } 

     @Override 
     public View onCreateView(LayoutInflater inflater, ViewGroup container, 
           Bundle savedInstanceState) { 
      int vNum = (int) getArguments().get(ARG_SECTION_NUMBER); 
      View rootView = null; 

      switch (vNum) { 
       case 1: 
        rootView = inflater.inflate(R.layout.fragmenttemplate_admin_control_tabbed, container, false); 

        GridView templateGrid = (GridView) rootView.findViewById(R.id.templateGrid); 
        templateGrid.setAdapter(new ArrayAdapter<ImageButton>(getContext(),android.R.layout.simple_list_item_1, templateIButtons)); 

        for (int i = 0; i < templateIcons.length; i++){ 
         templateIButtons.add(new ImageButton(getContext())); 
         templateIButtons.get(i).setImageResource(templateResources[i]); 
         templateIButtons.get(i).setBackgroundColor(Color.TRANSPARENT); 
         templateIButtons.get(i).setId(i); 
        } 
        break; 
       case 2: 
        rootView = inflater.inflate(R.layout.fragmentdefault_admin_control_tabbed, container, false); 
        break; 

       default: // 
      } 
      return rootView; 
     } 
    } 

    /** 
    * A {@link FragmentPagerAdapter} that returns a fragment corresponding to 
    * one of the sections/tabs/pages. 
    */ 
    public class SectionsPagerAdapter extends FragmentPagerAdapter { 

     public SectionsPagerAdapter(FragmentManager fm) { 
      super(fm); 
     } 

     @Override 
     public Fragment getItem(int position) { 
      // getItem is called to instantiate the fragment for the given page. 
      // Return a PlaceholderFragment (defined as a static inner class below). 
      return PlaceholderFragment.newInstance(position + 1); 
     } 

     @Override 
     public int getCount() { 
      // Show 3 total pages. 
      return 2; 
     } 

     @Override 
     public CharSequence getPageTitle(int position) { 
      switch (position) { 
       case 0: 
        return "Template"; 
       case 1: 
        return "Default"; 
      } 
      return null; 
     } 
    } 
} 


rootView = inflater.inflate(R.layout.fragmenttemplate_admin_control_tabbed, container, false); 

       GridView templateGrid = (GridView) rootView.findViewById(R.id.templateGrid); 
       templateGrid.setAdapter(new ArrayAdapter<ImageButton>(getContext(),android.R.layout.simple_list_item_1, templateIButtons)); 

       for (int i = 0; i < templateIcons.length; i++){ 
        templateIButtons.add(new ImageButton(getContext())); 
        templateIButtons.get(i).setImageResource(templateResources[i]); 
        templateIButtons.get(i).setBackgroundColor(Color.TRANSPARENT); 
        templateIButtons.get(i).setId(i); 
       } 

XML文件中的GridView

<GridView 
    android:id="@+id/templateGrid" 
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent" 
    android:padding="10dp" 
    android:verticalSpacing="10dp" 
    android:horizontalSpacing="10dp" 
    android:numColumns="auto_fit" 
    android:columnWidth="60dp" 
    android:stretchMode="columnWidth" 
    android:gravity="center" 
    /> 

Answer 1

尝试更新开关盒1点声明如下：

case 1: 
    rootView = inflater.inflate(R.layout.fragmenttemplate_admin_control_tabbed, container, false); 

    GridView templateGrid = (GridView) rootView.findViewById(R.id.templateGrid); 

    for (int i = 0; i < templateIcons.length; i++){ 
     templateIButtons.add(new ImageButton(getContext())); 
     templateIButtons.get(i).setImageResource(templateResources[i]); 
     templateIButtons.get(i).setBackgroundColor(Color.TRANSPARENT); 
     templateIButtons.get(i).setId(i); 
    } 

    templateGrid.setAdapter(new ArrayAdapter<ImageButton>(getContext(),android.R.layout.simple_list_item_1, templateIButtons)); 

    break;