Android Open Source - my-wallpaper File Browser Activity

From Project

Back to project page my-wallpaper.
License

The source code is released under:
MIT License
If you think the Android project my-wallpaper listed in this page is inappropriate, such as containing malicious code/tools or violating the copyright, please email info at java2s dot com, thanks.
Java Source Code

package com.koonen.photostream;
//w  w w  .ja  va 2s .c  om
import java.io.File;
import java.util.ArrayList;
import java.util.List;

import android.app.Activity;
import android.app.ListActivity;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.Toast;

public class FileBrowserActivity extends ListActivity {

  static final String EXTRA_FILE_PATH = "com.koonen.photostream.FilePath";
  public static final int REQUEST_SHOW_FILE_SYSTEM_PHOTO = 45;

  private enum DISPLAYMODE {
    ABSOLUTE, RELATIVE;
  }

  private final DISPLAYMODE displayMode = DISPLAYMODE.RELATIVE;
  private List<String> directoryEntries = new ArrayList<String>();
  private File currentDirectory = null;

  /** Called when the activity is first created. */
  @Override
  public void onCreate(Bundle icicle) {
    super.onCreate(icicle);

    setDefaultCurrentPath();

    browseTo(currentDirectory);
  }

  private void setDefaultCurrentPath() {
    if (Environment.MEDIA_MOUNTED.equals(Environment
        .getExternalStorageState())) {
      currentDirectory = Environment.getExternalStorageDirectory();
    } else {
      Toast.makeText(FileBrowserActivity.this,
          R.string.can_not_access_to_sdcard, Toast.LENGTH_LONG)
          .show();
      currentDirectory = new File("/");
    }
  }

  /**
   * This function browses up one level according to the field:
   * currentDirectory
   */
  private void upOneLevel() {
    if (this.currentDirectory.getParent() != null)
      this.browseTo(this.currentDirectory.getParentFile());
  }

  private void browseTo(final File aDirectory) {
    if (aDirectory.isDirectory()) {
      this.currentDirectory = aDirectory;
      fill(aDirectory.listFiles());
    } else {
      clickToFile(aDirectory);
      // OnClickListener okButtonListener = new OnClickListener() {
      //
      // @Override
      // public void onClick(View v) {
      // // Lets start an intent to View the file, that was
      // // clicked...
      // clickToFile(aDirectory);
      // }
      // };
      // OnClickListener cancelButtonListener = new OnClickListener() {
      //
      // @Override
      // public void onClick(View v) {
      // }
      //
      // };

      // LinearLayout layout = new LinearLayout(this);
      // layout.setOrientation(LinearLayout.VERTICAL);
      //
      // LinearLayout fieldLayout = new LinearLayout(this);
      // fieldLayout.setOrientation(LinearLayout.VERTICAL);
      //
      // TextView view = new TextView(this);
      // view.setText("Do you want to open that file?\n");
      // view.setPadding(5, 0, 0, 0);
      // fieldLayout.addView(view);
      //
      // LinearLayout buttonLayout = new LinearLayout(this);
      // buttonLayout.setGravity(Gravity.RIGHT);
      // buttonLayout.setOrientation(LinearLayout.HORIZONTAL);
      //
      // Button okButton = new Button(this);
      // okButton.setText("ok");
      // okButton.setOnClickListener(okButtonListener);
      // layout.addView(okButton);
      // Button cancelButton = new Button(this);
      // cancelButton.setText("cancel");
      //
      // layout.addView(fieldLayout);
      // layout.addView(buttonLayout);

      // new AlertDialog.Builder(FileBrowserActivity.this).setTitle(
      // "Question").setView(layout).create().show();
    }
  }

  private void clickToFile(File aFile) {
    Intent intent = new Intent();
    intent.putExtra(EXTRA_FILE_PATH, Uri.parse(
        "file://" + aFile.getAbsolutePath()).toString());
    setResult(ActivityConstants.SIMILAR_RESPONSE_ID, intent);
    finish();
  }

  private void fill(File[] files) {
    this.directoryEntries.clear();

    // Add the "." == "current directory"
    // and the ".." == 'Up one level'
    this.directoryEntries.add(getString(R.string.current_dir));
    if (this.currentDirectory.getParent() != null)
      this.directoryEntries.add(getString(R.string.up_one_level));

    switch (this.displayMode) {
    case ABSOLUTE:
      for (File file : files) {
        String fileName = file.getName();

        if (file.isDirectory()
            || checkEndsWithInStringArray(fileName, getResources()
                .getStringArray(R.array.fileEndingImage))) {
          this.directoryEntries.add(file.getPath());
        }
      }
      break;
    case RELATIVE: // On relative Mode, we have to add the current-path to
      // the beginning
      int currentPathStringLenght = this.currentDirectory
          .getAbsolutePath().length();
      for (File file : files) {
        String fileName = file.getName();

        if (file.isDirectory()
            || checkEndsWithInStringArray(fileName, getResources()
                .getStringArray(R.array.fileEndingImage))) {
          this.directoryEntries.add(file.getAbsolutePath().substring(
              currentPathStringLenght));
        }
      }
      break;
    }

    ArrayAdapter<String> directoryList = new ArrayAdapter<String>(this,
        R.layout.file_row, this.directoryEntries);

    this.setListAdapter(directoryList);
  }

  @Override
  protected void onListItemClick(ListView l, View v, int position, long id) {
    super.onListItemClick(l, v, position, id);
    // int selectionRowID = (int) this.getSelectionRowID();
    // int selectionRowID = (int) this.getSelectedItemId();
    int selectionRowID = position;

    String selectedFileString = this.directoryEntries.get(selectionRowID);
    if (selectedFileString.equals(getString(R.string.current_dir))) {
      // Refresh
      this.browseTo(this.currentDirectory);
    } else if (selectedFileString.equals(getString(R.string.up_one_level))) {
      this.upOneLevel();
    } else {
      File clickedFile = null;
      switch (this.displayMode) {
      case RELATIVE:
        clickedFile = new File(this.currentDirectory.getAbsolutePath()
            + this.directoryEntries.get(selectionRowID));
        break;
      case ABSOLUTE:
        clickedFile = new File(this.directoryEntries
            .get(selectionRowID));
        break;
      }
      if (clickedFile != null)
        this.browseTo(clickedFile);
    }
  }

  static void show(Activity context) {
    Intent intent = new Intent(context, FileBrowserActivity.class);

    context.startActivityForResult(intent, REQUEST_SHOW_FILE_SYSTEM_PHOTO);
  }

  /**
   * Checks whether checkItsEnd ends with one of the Strings from fileEndings
   */
  private boolean checkEndsWithInStringArray(String checkItsEnd,
      String[] fileEndings) {
    for (String aEnd : fileEndings) {
      if (checkItsEnd.endsWith(aEnd))
        return true;
    }
    return false;
  }
}
Java Source Code List
