Question

我遵循此tutorial下面是我的代码，它从应用程序内部存储器加载图像并使用简单的适配器显示但现在我想要广告复选框我发现这个教程哪个llad图像来自我想要的库自定义此示例代码以从文件位置加载图像我该怎么做如何更改此代码以从文件位置加载图像或如何自定义其适配器以加载我的文件我该怎么做帮助plz

               <!-----------------this is my code------>
 GridView gridView;
 SimpleAdapter simpleAdapter;

    gridView =(GridView)findViewById(R.id.grid);
    gridView.setOnItemClickListener(new OnItemClickListener(){
        public void onItemClick(AdapterView<?> parent, View view, int  
                        position,long id) {


        if(currentFiles[position].isDirectory())
        {
            root = new File("/data/data/com.myexample/files 
                /"+FileName(currentFilePath[position])+"/");

            Log.e("Root first",root+ " ");

            currentFiles = root.listFiles();

            inflateListView(currentFiles);
        }
        else if(currentFiles[position].isFile())
        {
                   inflateListView(currentFiles);
        } } });

         private void inflateListView(File[] files){

  List<Map<String,Object>> listItems = new ArrayList<Map<String,Object>>();

 for(int i=0;i<files.length;i++)
 {      
        Map<String, Object> listItem = new HashMap<String, Object>();

        if(files[i].isDirectory())
        {
            listItem.put("icon", R.drawable.folder);
        }
        else
        {
            listItem.put("icon",  files[i]);
        }

        listItem.put("fileName", files[i].getName());
        listItems.add(listItem);
    }

      simpleAdapter=new SimpleAdapter(this,listItems,R.layout.line,new String[] 
      {"icon","fileName"},new int[]{R.id.icon,R.id.file_name});
      gridView.setAdapter(simpleAdapter);




       <!--------this is sample code--------->>>>>>


import android.widget.CheckBox;
import android.widget.GridView;
import android.widget.ImageView;
import android.widget.Toast;

 public class AndroidCustomGalleryActivity extends Activity {
private int count;
private Bitmap[] thumbnails;
private boolean[] thumbnailsselection;
private String[] arrPath;
private ImageAdapter imageAdapter;

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    final String[] columns = { MediaStore.Images.Media.DATA, 
     MediaStore.Images.Media._ID };
    final String orderBy = MediaStore.Images.Media._ID;
    Cursor imagecursor = managedQuery(
            MediaStore.Images.Media.EXTERNAL_CONTENT_URI, columns, 
       null,
            null, orderBy);
    int image_column_index =  
       imagecursor.getColumnIndex(MediaStore.Images.Media._ID);
    this.count = imagecursor.getCount();
    this.thumbnails = new Bitmap[this.count];
    this.arrPath = new String[this.count];
    this.thumbnailsselection = new boolean[this.count];
    for (int i = 0; i < this.count; i++) {
        imagecursor.moveToPosition(i);
        int id = imagecursor.getInt(image_column_index);
        int dataColumnIndex = 
    imagecursor.getColumnIndex(MediaStore.Images.Media.DATA);
        thumbnails[i] = MediaStore.Images.Thumbnails.getThumbnail(
                getApplicationContext().getContentResolver(), id,
                MediaStore.Images.Thumbnails.MICRO_KIND, null);
        arrPath[i]= imagecursor.getString(dataColumnIndex);
    }
    GridView imagegrid = (GridView) findViewById(R.id.PhoneImageGrid);
    imageAdapter = new ImageAdapter();
    imagegrid.setAdapter(imageAdapter);
    imagecursor.close();

    final Button selectBtn = (Button) findViewById(R.id.selectBtn);
    selectBtn.setOnClickListener(new OnClickListener() {

        public void onClick(View v) {
            // TODO Auto-generated method stub
            final int len = thumbnailsselection.length;
            int cnt = 0;
            String selectImages = "";
            for (int i =0; i<len; i++)
            {
                if (thumbnailsselection[i]){
                    cnt++;
                    selectImages = selectImages + arrPath[i] + 
    "|";
                }
            }
            if (cnt == 0){
                Toast.makeText(getApplicationContext(),
                        "Please select at least one image",
                        Toast.LENGTH_LONG).show();
            } else {
                Toast.makeText(getApplicationContext(),
                        "You've selected Total " + cnt +  
  "  
       image(s).",
                        Toast.LENGTH_LONG).show();
                Log.d("SelectedImages", selectImages);
            }
        }
    });
}

public class ImageAdapter extends BaseAdapter {
    private LayoutInflater mInflater;

    public ImageAdapter() {
        mInflater = (LayoutInflater) 
         getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    }

    public int getCount() {
        return count;
    }

    public Object getItem(int position) {
        return position;
    }

    public long getItemId(int position) {
        return position;
    }

    public View getView(int position, View convertView, ViewGroup parent) {
        ViewHolder holder;
        if (convertView == null) {
            holder = new ViewHolder();
            convertView = mInflater.inflate(
                    R.layout.galleryitem, null);
            holder.imageview = (ImageView)  
        convertView.findViewById(R.id.thumbImage);
            holder.checkbox = (CheckBox)  
       convertView.findViewById(R.id.itemCheckBox);

            convertView.setTag(holder);
        }
        else {
            holder = (ViewHolder) convertView.getTag();
        }
        holder.checkbox.setId(position);
        holder.imageview.setId(position);
        holder.checkbox.setOnClickListener(new OnClickListener() {

            public void onClick(View v) {
                // TODO Auto-generated method stub
                CheckBox cb = (CheckBox) v;
                int id = cb.getId();
                if (thumbnailsselection[id]){
                    cb.setChecked(false);
                    thumbnailsselection[id] = false;
                } else {
                    cb.setChecked(true);
                    thumbnailsselection[id] = true;
                }
            }
        });
        holder.imageview.setOnClickListener(new OnClickListener() {

            public void onClick(View v) {
                // TODO Auto-generated method stub
                int id = v.getId();
                Intent intent = new Intent();
                intent.setAction(Intent.ACTION_VIEW);
                intent.setDataAndType(Uri.parse("file://" + 
    arrPath[id]), "image/*");
                startActivity(intent);
            }
        });
        holder.imageview.setImageBitmap(thumbnails[position]);
        holder.checkbox.setChecked(thumbnailsselection[position]);
        holder.id = position;
        return convertView;
    }
}
class ViewHolder {
    ImageView imageview;
    CheckBox checkbox;
    int id;
}
     }

Answer 1

import com.example.appsecurity.AndroidCustomGalleryActivity.ImageAdapter;

import android.app.Activity;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.provider.MediaStore;
import android.widget.GridView;

public class unhide extends Activity {
    private int count;
    private Bitmap[] thumbnails;
    private boolean[] thumbnailsselection;
    private String[] arrPath;
   private ImageAdapter imageAdapter1 ;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.unhide);

        final String[] columns = { MediaStore.Images.Media.DATA, MediaStore.Images.Media._ID};

        final String orderBy = MediaStore.Images.Media._ID;

        Cursor imagecursor = getContentResolver().query( MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
                columns, 
                MediaStore.Images.Media.DATA + " like ? ",
                new String[] {"%/./%"},  
                null);
                int image_column_index = imagecursor.getColumnIndex(MediaStore.Images.Media._ID);          
                this.count = imagecursor.getCount();        
                this.thumbnails = new Bitmap[this.count];       
                this.arrPath = new String[this.count];  
                this.thumbnailsselection = new boolean[this.count];

        for (int i = 0; i < this.count; i++) {

            imagecursor.moveToPosition(i);

            int id = imagecursor.getInt(image_column_index);        
            int dataColumnIndex = imagecursor.getColumnIndex(MediaStore.Images.Media.DATA); 

          thumbnails[i] = MediaStore.Images.Thumbnails.getThumbnail(        
                    getApplicationContext().getContentResolver(), id,       
                    MediaStore.Images.Thumbnails.MICRO_KIND, null);     

            arrPath[i]= imagecursor.getString(dataColumnIndex);





    }

        GridView imagegrid = (GridView) findViewById(R.id.Unhide);      
        ImageAdapter  imageAdapter1  =  ImageAdapter();      
        imagegrid.setAdapter(imageAdapter1);     
        imagecursor.close();
}
    private ImageAdapter ImageAdapter() {
        // TODO Auto-generated method stub
        return null;
    }
}

如何从其他位置加载gridview中的图像

1 个答案: