Android Open Source - dttv-android File Show Activity

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From Project

Back to project page dttv-android.

License

The source code is released under:

GNU General Public License

Java Source Code

package dttv.app;
/*from ww  w  . j a  v a2  s.  c  o m*/
import java.io.File;
import java.io.FilenameFilter;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.os.Environment;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.Button;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
import dttv.app.adapter.FileAdapter;
import dttv.app.impl.I_Async;
import dttv.app.model.Item;
import dttv.app.multithread.DataAsyncTask;
import dttv.app.utils.Constant;

public class FileShowActivity extends Activity implements I_Async{
  
  private final String TAG = "FileShowActivity";
  private TextView indexTxt;
  private ListView mListView;
  private ArrayList<String> pathDirsList;
  private FileAdapter mFileAdapter;
  private File path;
  private String chosenFile;
  private DataAsyncTask mAsyncTask;
  private List<Item> fileList;
  
  private static int currentAction = -1;
  private static final int SELECT_DIRECTORY = 1;
  private static final int SELECT_FILE = 2;
  
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);
    setContentView(R.layout.file_browser);
    initViews();
    initData();
    parseDirectoryPath();
    startDataTask("begin");
    initListener();
  }
  
  private void initData(){
    pathDirsList = new ArrayList<String>();
    mAsyncTask = new DataAsyncTask(this);
    fileList  = new ArrayList<Item>();
    if (Environment.getExternalStorageDirectory().isDirectory()
        && Environment.getExternalStorageDirectory().canRead())
      path = Environment.getExternalStorageDirectory();
    else
      path = new File("/");
  }
  
  private void startDataTask(String index){
    stopDataTask();
    if(mAsyncTask==null){
      mAsyncTask = new DataAsyncTask(this);
    }
    mAsyncTask.execute(index);
  }
  
  private void stopDataTask(){
    if(mAsyncTask!=null){
      mAsyncTask.cancel(true);
      mAsyncTask = null;
    }
  }
  
  private void initViews(){
    mListView = (ListView)findViewById(R.id.dt_file_listview);
    indexTxt = (TextView)findViewById(R.id.dt_file_index_txt);
  }
  private void showToast(String message) {
    Toast.makeText(this, message, Toast.LENGTH_LONG).show();
  }
  
  private void initListener(){
    mListView.setOnItemClickListener(new OnItemClickListener() {
      @Override
      public void onItemClick(AdapterView<?> adapter, View v, int position,
          long arg3) {
        // TODO Auto-generated method stub
        chosenFile = fileList.get(position).file;
        File sel = new File(path + "/" + chosenFile);
        if(sel.isDirectory()){
          if (sel.canRead()) {
            // Adds chosen directory to list
            pathDirsList.add(chosenFile);
            path = new File(sel + "");
            //loadFileList();
            startDataTask("child");
            Log.d(TAG, path.getAbsolutePath());
          } else {// if(sel.canRead()) {
            showToast("Path does not exist or cannot be read");
          }
        }else{
          startAudioPlayer(sel.getAbsolutePath());
        }
      }
    });
  }
  
  @Override
  public void onBackPressed() {
    // TODO Auto-generated method stub
    if(indexTxt.getText().toString().equals("/")){
      super.onBackPressed();
    }else{
      loadDirectoryUp();
    }
  }
  
  private void startAudioPlayer(String uri){
    Intent retIntent = new Intent();
    retIntent.setClass(this, VideoPlayerActivity.class);
    retIntent.putExtra(Constant.FILE_MSG, uri);
    startActivity(retIntent);
  }
  
  private void parseDirectoryPath() {
    pathDirsList.clear();
    String pathString = path.getAbsolutePath();
    String[] parts = pathString.split("/");
    int i = 0;
    while (i < parts.length) {
      pathDirsList.add(parts[i]);
      i++;
    }
  }
  
  private void updateCurrentDirTextView(){
    int i = 0;
    String curDirString = "";
    while (i < pathDirsList.size()) {
      curDirString += pathDirsList.get(i) + "/";
      i++;
    }
    if (pathDirsList.size() == 0) {
      ((Button) this.findViewById(R.id.upDirectoryButton))
          .setEnabled(false);
      curDirString = "/";
    }
    indexTxt.setText(curDirString);
  }
  
  /**
   * for key back
   */
  private void loadDirectoryUp() {
    // present directory removed from list
    String s = pathDirsList.remove(pathDirsList.size() - 1);
    // path modified to exclude present directory
    path = new File(path.toString().substring(0,
        path.toString().lastIndexOf(s)));
    fileList.clear();
    startDataTask("back");
  }
  
  private void loadFileList() {
    try {
      path.mkdirs();
    } catch (SecurityException e) {
      Log.e(TAG, "unable to write on the sd card ");
    }
    fileList.clear();
    if(path.exists() && path.canRead()){
      FilenameFilter filter = new FilenameFilter() {
        @Override
        public boolean accept(File dir, String filename) {
          // TODO Auto-generated method stub
          File sel = new File(dir, filename);
          boolean showReadableFile = sel.canRead();
          if (currentAction == SELECT_DIRECTORY) {
            return (sel.isDirectory() && showReadableFile);
          }
          return true;
        }
      };
      String[] fList = path.list(filter);
      for(int i= 0; i<fList.length; i++){
        Item item = new Item(path, fList[i]);
        if(item.isDirectory()){
          item.setIcon(R.drawable.dt_browser_folder);
        }else{
          item.setIcon(R.drawable.dt_browser_file);
        }
        fileList.add(item);
      }
      if(fileList.size() == 0){
      }else{
        Collections.sort(fileList, new ItemFileNameComparator());
      }
    }
  }
  
  public class ItemFileNameComparator implements Comparator<Item> {
    public int compare(Item lhs, Item rhs) {
      return lhs.file.toLowerCase().compareTo(rhs.file.toLowerCase());
    }
  }
  
  @Override
  protected void onResume() {
    // TODO Auto-generated method stub
    super.onResume();
  }
  
  
  @Override
  protected void onStop() {
    // TODO Auto-generated method stub
    super.onStop();
  }
  
  @Override
  protected void onDestroy() {
    // TODO Auto-generated method stub
    mFileAdapter = null;
    pathDirsList.clear();
    pathDirsList = null;
    fileList.clear();
    fileList = null;
    stopDataTask();
    super.onDestroy();
  }

  @Override
  public void onPreHandleData() {
    // TODO Auto-generated method stub
    
  }

  @Override
  public void onHandleData() {
    // TODO Auto-generated method stub
    loadFileList();
  }

  @Override
  public void onPostHandleData() {
    // TODO Auto-generated method stub
    if(mFileAdapter==null){
      mFileAdapter = new FileAdapter(this, fileList);
      mListView.setAdapter(mFileAdapter);
    }else{
      mFileAdapter.freshData(fileList);
      mFileAdapter.notifyDataSetChanged();
    }
    updateCurrentDirTextView();
  }
}

Java Source Code List

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