Android Open Source - filelistview File List Item View

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License

The source code is released under:

MIT License

Java Source Code

package com.jcw.andriod.fileListView;
//  w ww. ja va2  s  .  c o  m
/*
 * Author - Woodruff
 * 
 */

import android.content.Context;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.widget.ImageView;
import android.widget.RelativeLayout;
import android.widget.TextView;

import com.jcw.android.fileListView.R;

import java.io.File;

public class FileListItemView extends RelativeLayout {
    protected TextView fileName;
    protected TextView metadata;
    protected ImageView icon;

    //this is a risky field to have
    // but it is needed for use in icon generation
    private File file = null;


    public FileListItemView(Context context) {
        super(context);
        init();
    }

    public FileListItemView(Context context, AttributeSet attrs) {
        super(context, attrs);
        init();
    }

    public FileListItemView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        init();
    }

    private void init() {
        LayoutInflater inflater = LayoutInflater.from(getContext());
        inflater.inflate(R.layout.file_list_item, FileListItemView.this);

        fileName = (TextView) findViewById(R.id.fileName);
        metadata = (TextView) findViewById(R.id.metaInfo);
        icon = (ImageView) findViewById(R.id.icon);

        icon.setMinimumHeight(PictureGenerator.ICON_SIZE);
        icon.setMinimumWidth(PictureGenerator.ICON_SIZE);
    }

    /*
    returns a string that shows the directory that this
    item represents.

    However, it only returns the **lowest level**, i.e.
    for the folder "storage/sd/example", this would return
    "example"
     */
    public String getRepresentedDir() {
        return fileName.getText().toString();
    }

    public void setFileName(String fileName) {
        this.fileName.setText(fileName);
    }

    public void setMetadata(String metadata) {
        this.metadata.setText(metadata);
    }

    public void setIcon(int resId) {
        this.icon.setImageResource(resId);
    }

    /*
     * either returns the whole represented file
     * or throw an exception.. Should be used with
     * extreme caution.
     */
    public File getFullFile() {
        if (file == null) {
            throw new NullPointerException("getFullFile called before setFile");
        } else {
            return file;
        }
    }

    public void setFile(File file) {
        setFileName(file.getName());
        setMetadata(getMetadataText(file));
        this.file = file;
    }

    /*
     * If this is a type of file that has a picture
     * associated with it (i.e. a .jpg/png file)
     * then it will be shown as the picture.
     * Otherwise, the icon will not be changed
     */
    public void resetPicture(File thisFile) {
        if (thisFile.isDirectory()) {
            this.setIcon(R.drawable.directory_icon);
        } else if (getRepresentedDir().equals("...")) {
            this.setIcon(R.drawable.directory_up);
        } else {
            PictureGenerator generator = new PictureGenerator(this.file);
            generator.addIconAsync(this.icon);
        }
    }

    @Override
    public void onAttachedToWindow() {
        //now attached to window so we can
        //refresh the icon
        super.onAttachedToWindow();
        this.resetPicture(getFullFile());
    }


    /*
    returns by default the size of the file if the
    this represents a file and an empty string if
     this represents a folder
     */
    public String getMetadataText(File file) {
        if (file.isFile()) {
            return formatBytes(file.length());
        } else {
            return "";
        }
    }


  /*
    formats a large number of bytes into a normal
  representation (i.e. kB, MB, GB etc.)
   */

    private static String formatBytes(long byteCount) {
        //keeps track of which postfix is needed
        int index = 0;
        //keeps track of the last 3 digits to display after the
        //decimal point
        int postDecimalPoint = 0;
        final String[] postFixes = new String[]{"bytes", "kb", "mb", "gb", "pb", "eb"};
        while (byteCount >= 1000) {
            index++;
            //no need to round -- this doesn't have to be
            //perfect
            postDecimalPoint = (int) (byteCount % 1000);
            byteCount /= 1000;
        }

        return Long.toString(byteCount) +
                "." + Integer.toString(postDecimalPoint) +
                " " + postFixes[index];
    }
}

Java Source Code List

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