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package com.artifex.mupdfdemo;
import java.io.File;
import java.io.FileFilter;
import java.util.Arrays;
import java.util.Comparator;
import java.util.HashMap;
import java.util.Map;
import android.app.AlertDialog;
import android.app.ListActivity;
import android.content.DialogInterface;
import android.content.DialogInterface.OnClickListener;
import android.content.Intent;
import android.content.res.Resources;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.os.FileObserver;
import android.os.Handler;
import android.view.View;
import android.widget.ListView;
enum Purpose {
PickPDF,
PickKeyFile
}
public class ChoosePDFActivity extends ListActivity {
static public final String PICK_KEY_FILE = "com.artifex.mupdfdemo.PICK_KEY_FILE";
static private File mDirectory;
static private Map<String, Integer> mPositions = new HashMap<String, Integer>();
private File mParent;
private File [] mDirs;
private File [] mFiles;
private Handler mHandler;
private Runnable mUpdateFiles;
private ChoosePDFAdapter adapter;
private Purpose mPurpose;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mPurpose = PICK_KEY_FILE.equals(getIntent().getAction()) ? Purpose.PickKeyFile : Purpose.PickPDF;
String storageState = Environment.getExternalStorageState();
if (!Environment.MEDIA_MOUNTED.equals(storageState)
&& !Environment.MEDIA_MOUNTED_READ_ONLY.equals(storageState))
{
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle(R.string.no_media_warning);
builder.setMessage(R.string.no_media_hint);
AlertDialog alert = builder.create();
alert.setButton(AlertDialog.BUTTON_POSITIVE,getString(R.string.dismiss),
new OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
finish();
}
});
alert.show();
return;
}
if (mDirectory == null)
mDirectory = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS);
// Create a list adapter...
adapter = new ChoosePDFAdapter(getLayoutInflater());
setListAdapter(adapter);
// ...that is updated dynamically when files are scanned
mHandler = new Handler();
mUpdateFiles = new Runnable() {
public void run() {
Resources res = getResources();
String appName = res.getString(R.string.app_name);
String version = res.getString(R.string.version);
String title = res.getString(R.string.picker_title_App_Ver_Dir);
setTitle(String.format(title, appName, version, mDirectory));
mParent = mDirectory.getParentFile();
mDirs = mDirectory.listFiles(new FileFilter() {
public boolean accept(File file) {
return file.isDirectory();
}
});
if (mDirs == null)
mDirs = new File[0];
mFiles = mDirectory.listFiles(new FileFilter() {
public boolean accept(File file) {
if (file.isDirectory())
return false;
String fname = file.getName().toLowerCase();
switch (mPurpose) {
case PickPDF:
if (fname.endsWith(".pdf"))
return true;
if (fname.endsWith(".xps"))
return true;
if (fname.endsWith(".cbz"))
return true;
if (fname.endsWith(".epub"))
return true;
if (fname.endsWith(".fb2"))
return true;
if (fname.endsWith(".png"))
return true;
if (fname.endsWith(".jpe"))
return true;
if (fname.endsWith(".jpeg"))
return true;
if (fname.endsWith(".jpg"))
return true;
if (fname.endsWith(".jfif"))
return true;
if (fname.endsWith(".jfif-tbnl"))
return true;
if (fname.endsWith(".tif"))
return true;
if (fname.endsWith(".tiff"))
return true;
return false;
case PickKeyFile:
if (fname.endsWith(".pfx"))
return true;
return false;
default:
return false;
}
}
});
if (mFiles == null)
mFiles = new File[0];
Arrays.sort(mFiles, new Comparator<File>() {
public int compare(File arg0, File arg1) {
return arg0.getName().compareToIgnoreCase(arg1.getName());
}
});
Arrays.sort(mDirs, new Comparator<File>() {
public int compare(File arg0, File arg1) {
return arg0.getName().compareToIgnoreCase(arg1.getName());
}
});
adapter.clear();
if (mParent != null)
adapter.add(new ChoosePDFItem(ChoosePDFItem.Type.PARENT, getString(R.string.parent_directory)));
for (File f : mDirs)
adapter.add(new ChoosePDFItem(ChoosePDFItem.Type.DIR, f.getName()));
for (File f : mFiles)
adapter.add(new ChoosePDFItem(ChoosePDFItem.Type.DOC, f.getName()));
lastPosition();
}
};
// Start initial file scan...
mHandler.post(mUpdateFiles);
// ...and observe the directory and scan files upon changes.
FileObserver observer = new FileObserver(mDirectory.getPath(), FileObserver.CREATE | FileObserver.DELETE) {
public void onEvent(int event, String path) {
mHandler.post(mUpdateFiles);
}
};
observer.startWatching();
}
private void lastPosition() {
String p = mDirectory.getAbsolutePath();
if (mPositions.containsKey(p))
getListView().setSelection(mPositions.get(p));
}
@Override
protected void onListItemClick(ListView l, View v, int position, long id) {
super.onListItemClick(l, v, position, id);
mPositions.put(mDirectory.getAbsolutePath(), getListView().getFirstVisiblePosition());
if (position < (mParent == null ? 0 : 1)) {
mDirectory = mParent;
mHandler.post(mUpdateFiles);
return;
}
position -= (mParent == null ? 0 : 1);
if (position < mDirs.length) {
mDirectory = mDirs[position];
mHandler.post(mUpdateFiles);
return;
}
position -= mDirs.length;
Uri uri = Uri.fromFile(mFiles[position]);
Intent intent = new Intent(this,MuPDFActivity.class);
intent.setAction(Intent.ACTION_VIEW);
intent.setData(uri);
switch (mPurpose) {
case PickPDF:
// Start an activity to display the PDF file
startActivity(intent);
break;
case PickKeyFile:
// Return the uri to the caller
setResult(RESULT_OK, intent);
finish();
break;
}
}
@Override
protected void onPause() {
super.onPause();
if (mDirectory != null)
mPositions.put(mDirectory.getAbsolutePath(), getListView().getFirstVisiblePosition());
}
}
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