Android Open Source - AndroidFileExplorer Main Activity

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License

The source code is released under:

This is free and unencumbered software released into the public domain. Anyone is free to copy, modify, publish, use, compile, sell, or distribute this software, either in source code form or as a co...

Java Source Code

package com.example.androidfileexplorer;
//from w  ww . ja  v  a2  s  .  co m
import java.io.File;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.SharedPreferences.OnSharedPreferenceChangeListener;
import android.os.AsyncTask;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.TextView;

public class MainActivity extends Activity implements OnClickListener,
    OnItemClickListener, OnSharedPreferenceChangeListener {
  public static final boolean DEVELOPER_MODE = true;
  private static final String tag = "MainActivity";
  private static final String BUNDLE_CWD = "cwd";
  private static final File ROOT_DIR = File.listRoots()[0];
  private File mCwd;
  private ArrayAdapter<File> mEntryAdapter;
  private List<File> mEntries;
  ListView listView;

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

    SharedPreferences prefs = PreferenceManager
        .getDefaultSharedPreferences(this);
    prefs.registerOnSharedPreferenceChangeListener(this);

    mEntries = new ArrayList<File>();
    mEntryAdapter = new DirListArrayAdapter(this, R.id.entry, mEntries);

    Button upButton = (Button) findViewById(R.id.up);
    upButton.setOnClickListener(this);
    listView = (ListView) findViewById(R.id.entry_list_view);
    listView.setAdapter(mEntryAdapter);
    listView.setOnItemClickListener(this);
    listView.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE_MODAL);
    listView.setMultiChoiceModeListener(new FileMultiChoiceModeListener(
        this));

    mCwd = ROOT_DIR;
    if (savedInstanceState != null) {
      String d = savedInstanceState.getString(BUNDLE_CWD);
      if (d != null) {
        mCwd = new File(d);
      }
    }
    new DirListTask().execute();
  }

  @Override
  public void onSharedPreferenceChanged(SharedPreferences prefs, String key) {
    if (SettingsActivity.PREF_DIR_COLOR.equals(key)
        || SettingsActivity.PREF_FILE_COLOR.equals(key)) {

      String dirColor = PreferenceManager.getDefaultSharedPreferences(
          this).getString(SettingsActivity.PREF_DIR_COLOR, "_");
      String fileColor = PreferenceManager.getDefaultSharedPreferences(
          this).getString(SettingsActivity.PREF_FILE_COLOR, "_");
      if (!fileColor.equals(" ") && !dirColor.equals(" ")
          && fileColor.equals(dirColor)) {
        Util.toolTip(this, R.string.dir_file_color_equal);
      }
      mEntryAdapter = new DirListArrayAdapter(this, R.id.entry, mEntries);
      listView.setAdapter(mEntryAdapter);
    }
  }

  private void setPreferences() {
    boolean readAgain = false;
    if (DEVELOPER_MODE) {
      SharedPreferences sharedPref = PreferenceManager
          .getDefaultSharedPreferences(this);
      SharedPreferences.Editor editor = sharedPref.edit();
      editor.clear();
      editor.commit();
      readAgain = true;
    }
    PreferenceManager.setDefaultValues(this, R.xml.preferences, readAgain);
  }

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

  @Override
  public void onItemClick(AdapterView<?> listView, View view, int pos, long id) {
    File f = (File) listView.getItemAtPosition(pos);
    if (f.isDirectory()) {
      mCwd = new File(f.toString());
      new DirListTask().execute();
    } else {
      Util.openFileWithApp(this, f);
    }
  }

  @Override
  public void onBackPressed() {
    moveUp();
  }

  @Override
  public void onClick(View v) {
    switch (v.getId()) {
    case R.id.up:
      moveUp();
      break;
    }
  }

  private void moveUp() {
    String p = mCwd.getParent();
    mCwd = (p != null ? new File(p) : ROOT_DIR);
    new DirListTask().execute();
  }

  @Override
  protected void onSaveInstanceState(Bundle outState) {
    super.onSaveInstanceState(outState);
    outState.putString(BUNDLE_CWD, mCwd.toString());
  }

  public void openSettingsActivity(MenuItem item) {
    Intent intent = new Intent(this, SettingsActivity.class);
    startActivity(intent);
  }

  public void updateDirList() {
    new DirListTask().execute();
  }

  private class DirListTask extends AsyncTask<Void, Void, Void> {
    private List<File> newEntries;

    @Override
    protected Void doInBackground(Void... params) {
      newEntries = new ArrayList<File>();
      File[] tmp = mCwd.listFiles(Util.onlyDirFilter());
      if (tmp != null) {
        Arrays.sort(tmp);
        newEntries.addAll(Arrays.asList(tmp));
      }
      tmp = mCwd.listFiles(Util.onlyFileFilter());
      if (tmp != null) {
        Arrays.sort(tmp);
        newEntries.addAll(Arrays.asList(tmp));
      }
      return null;
    }

    @Override
    protected void onPostExecute(Void result) {
      mEntries.clear();
      mEntries.addAll(newEntries);
      mEntryAdapter.notifyDataSetChanged();
      listView.setSelection(0);
      TextView cwdView = (TextView) findViewById(R.id.cwd);
      cwdView.setText("[" + mCwd.toString() + "]");
    }
  }
}

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