IntentFilterActivity.java

package org.openintents.filemanager;

import android.content.Intent;
import android.os.Build.VERSION;
import android.os.Build.VERSION_CODES;
import android.os.Bundle;
import android.os.Environment;
import android.support.v4.app.FragmentActivity;
import android.view.KeyEvent;

import org.openintents.filemanager.lists.FileListFragment;
import org.openintents.filemanager.lists.MultiselectListFragment;
import org.openintents.filemanager.lists.PickFileListFragment;
import org.openintents.filemanager.util.FileUtils;
import org.openintents.filemanager.util.UIUtils;
import org.openintents.intents.FileManagerIntents;

import java.io.File;

public class IntentFilterActivity extends FragmentActivity {
    private FileListFragment mFragment;

    @Override
    protected void onCreate(Bundle savedInstance) {
        UIUtils.setThemeFor(this);

        super.onCreate(savedInstance);

        Intent intent = getIntent();

        // Initialize arguments
        Bundle extras = intent.getExtras();
        if (extras == null)
            extras = new Bundle();
        // Add a path if path is not specified in this activity's call
        if (!extras.containsKey(FileManagerIntents.EXTRA_DIR_PATH)) {
            // Set a default path so that we launch a proper list.
            File defaultFile = new File(
                    PreferenceActivity.getDefaultPickFilePath(this));
            if (!defaultFile.exists()) {
                PreferenceActivity.setDefaultPickFilePath(this, Environment
                        .getExternalStorageDirectory().getAbsolutePath());
                defaultFile = new File(
                        PreferenceActivity.getDefaultPickFilePath(this));
            }
            extras.putString(FileManagerIntents.EXTRA_DIR_PATH,
                    defaultFile.getAbsolutePath());
        }

        // Add a path if a path has been specified in this activity's call.
        File data = FileUtils.getFile(getIntent().getData());
        if (data != null) {
            File dir = FileUtils.getPathWithoutFilename(data);
            if (dir != null) {
                extras.putString(FileManagerIntents.EXTRA_DIR_PATH,
                        data.getAbsolutePath());
            }
            if (dir != data) {
                // data is a file
                extras.putString(FileManagerIntents.EXTRA_FILENAME, data.getName());
            }
        }

        // Add a mimetype filter if it was specified through the type of the
        // intent.
        if (!extras.containsKey(FileManagerIntents.EXTRA_FILTER_MIMETYPE)
                && intent.getType() != null)
            extras.putString(FileManagerIntents.EXTRA_FILTER_MIMETYPE,
                    intent.getType());

        // Actually fill the ui
        chooseListType(intent, extras);
    }

    private void chooseListType(Intent intent, Bundle extras) {
        // Multiselect
        if (FileManagerIntents.ACTION_MULTI_SELECT.equals(intent.getAction())) {
            String tag = "MultiSelectListFragment";
            mFragment = (MultiselectListFragment) getSupportFragmentManager()
                    .findFragmentByTag(tag);

            // Only add if it doesn't exist
            if (mFragment == null) {
                mFragment = new MultiselectListFragment();
                // Pass extras through to the list fragment. This helps
                // centralize the path resolving, etc.
                mFragment.setArguments(extras);

                setTitle(R.string.multiselect_title);

                getSupportFragmentManager().beginTransaction()
                        .add(android.R.id.content, mFragment, tag).commit();
            }
        }
        // Item pickers
        else if (FileManagerIntents.ACTION_PICK_DIRECTORY.equals(intent.getAction())
                || FileManagerIntents.ACTION_PICK_FILE.equals(intent.getAction())
                || Intent.ACTION_GET_CONTENT.equals(intent.getAction())) {
            if (intent.hasExtra(FileManagerIntents.EXTRA_TITLE))
                setTitle(intent.getStringExtra(FileManagerIntents.EXTRA_TITLE));
            else
                setTitle(R.string.pick_title);

            mFragment = (PickFileListFragment) getSupportFragmentManager()
                    .findFragmentByTag(PickFileListFragment.class.getName());

            // Only add if it doesn't exist
            if (mFragment == null) {
                mFragment = new PickFileListFragment();

                // Pass extras through to the list fragment. This helps
                // centralize the path resolving, etc.
                extras.putBoolean(
                        FileManagerIntents.EXTRA_IS_GET_CONTENT_INITIATED,
                        intent.getAction().equals(Intent.ACTION_GET_CONTENT));
                extras.putBoolean(
                        FileManagerIntents.EXTRA_DIRECTORIES_ONLY,
                        intent.getAction().equals(
                                FileManagerIntents.ACTION_PICK_DIRECTORY));

                mFragment.setArguments(extras);
                getSupportFragmentManager()
                        .beginTransaction()
                        .add(android.R.id.content, mFragment,
                                PickFileListFragment.class.getName()).commit();
            }
        }
    }

    // The following methods should properly handle back button presses on every
    // API Level.
    @Override
    public boolean onKeyUp(int keyCode, KeyEvent event) {
        // Only check fragment back-ability if we're on the filepicker fragment.
        if (mFragment instanceof PickFileListFragment && VERSION.SDK_INT > VERSION_CODES.DONUT) {
            if (keyCode == KeyEvent.KEYCODE_BACK
                    && ((PickFileListFragment) mFragment).pressBack())
                return true;
        }

        return super.onKeyUp(keyCode, event);
    }

    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        // Only check fragment back-ability if we're on the filepicker fragment.
        if (mFragment instanceof PickFileListFragment && VERSION.SDK_INT <= VERSION_CODES.DONUT) {
            if (keyCode == KeyEvent.KEYCODE_BACK
                    && ((PickFileListFragment) mFragment).pressBack())
                return true;
        }

        return super.onKeyDown(keyCode, event);
    }
}