如何使用Android的Java类的PhoneGap？

问题描述

我在机器人的应用程序，浏览并上传file.My java类所在的位置：

I have an application in android which browse and upload file.My java classes are here:

MainActivity.java

MainActivity.java

public class MainActivity extends Activity implements OnClickListener {

private static final int REQUEST_PICK_FILE = 1;

private TextView mFilePathTextView;
private Button mStartActivityButton;
private File selectedFile;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    // Set the views
    mFilePathTextView = (TextView)findViewById(R.id.file_path_text_view);
    mStartActivityButton = (Button)findViewById(R.id.start_file_picker_button);
    mStartActivityButton.setOnClickListener(this);
}

public void onClick(View v) {
    switch(v.getId()) {
    case R.id.start_file_picker_button:
        // Create a new Intent for the file picker activity
        Intent intent = new Intent(this, FilePickerActivity.class);

        // Set the initial directory to be the sdcard
        //intent.putExtra(FilePickerActivity.EXTRA_FILE_PATH, Environment.getExternalStorageDirectory());

        // Show hidden files
        //intent.putExtra(FilePickerActivity.EXTRA_SHOW_HIDDEN_FILES, true);

        // Only make .png files visible
        //ArrayList<String> extensions = new ArrayList<String>();
        //extensions.add(".png");
        //intent.putExtra(FilePickerActivity.EXTRA_ACCEPTED_FILE_EXTENSIONS, extensions);

        // Start the activity
        startActivityForResult(intent, REQUEST_PICK_FILE);
        break;

    //case R.id.You_can_handle_more_onclick_events_from_here:
        //Do something
        //break;
    }
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if(resultCode == RESULT_OK) {
        switch(requestCode) {
        case REQUEST_PICK_FILE:
            if(data.hasExtra(FilePickerActivity.EXTRA_FILE_PATH)) {
                // Get the file path
                selectedFile = new File(data.getStringExtra(FilePickerActivity.EXTRA_FILE_PATH));
                // Set the file path text view
                mFilePathTextView.setText(selectedFile.getPath());
                //Now you have your selected file, You can do your additional requirement with file.
           }
         }
      }
   }
}

FilePickerActivity.java

FilePickerActivity.java

public class FilePickerActivity extends ListActivity {

public final static String EXTRA_FILE_PATH = "file_path";
public final static String EXTRA_SHOW_HIDDEN_FILES = "show_hidden_files";
public final static String EXTRA_ACCEPTED_FILE_EXTENSIONS = "accepted_file_extensions";
private final static String DEFAULT_INITIAL_DIRECTORY = "/";

protected File mDirectory;
protected ArrayList<File> mFiles;
protected FilePickerListAdapter mAdapter;
protected boolean mShowHiddenFiles = false;
protected String[] acceptedFileExtensions;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    // Set the view to be shown if the list is empty
    LayoutInflater inflator = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    View emptyView = inflator.inflate(R.layout.file_picker_empty_view, null);
    ((ViewGroup)getListView().getParent()).addView(emptyView);
    getListView().setEmptyView(emptyView);

    // Set initial directory
    mDirectory = new File(DEFAULT_INITIAL_DIRECTORY);

    // Initialize the ArrayList
    mFiles = new ArrayList<File>();

    // Set the ListAdapter
    mAdapter = new FilePickerListAdapter(this, mFiles);
    setListAdapter(mAdapter);

    // Initialize the extensions array to allow any file extensions
    acceptedFileExtensions = new String[] {};

    // Get intent extras
    if(getIntent().hasExtra(EXTRA_FILE_PATH)) {
        mDirectory = new File(getIntent().getStringExtra(EXTRA_FILE_PATH));
    }
    if(getIntent().hasExtra(EXTRA_SHOW_HIDDEN_FILES)) {
        mShowHiddenFiles = getIntent().getBooleanExtra(EXTRA_SHOW_HIDDEN_FILES, false);
    }
    if(getIntent().hasExtra(EXTRA_ACCEPTED_FILE_EXTENSIONS)) {
        ArrayList<String> collection = getIntent().getStringArrayListExtra(EXTRA_ACCEPTED_FILE_EXTENSIONS);
        acceptedFileExtensions = (String[]) collection.toArray(new String[collection.size()]);
    }
}

@Override
protected void onResume() {
    refreshFilesList();
    super.onResume();
}

/**
 * Updates the list view to the current directory
 */
protected void refreshFilesList() {
    // Clear the files ArrayList
    mFiles.clear();

    // Set the extension file filter
    ExtensionFilenameFilter filter = new ExtensionFilenameFilter(acceptedFileExtensions);

    // Get the files in the directory
    File[] files = mDirectory.listFiles(filter);
    if(files != null && files.length > 0) {
        for(File f : files) {
            if(f.isHidden() && !mShowHiddenFiles) {
                // Don't add the file
                continue;
            }

            // Add the file the ArrayAdapter
            mFiles.add(f);
        }

        Collections.sort(mFiles, new FileComparator());
    }
    mAdapter.notifyDataSetChanged();
}

@Override
public void onBackPressed() {
    if(mDirectory.getParentFile() != null) {
        // Go to parent directory
        mDirectory = mDirectory.getParentFile();
        refreshFilesList();
        return;
    }

    super.onBackPressed();
}

@Override
protected void onListItemClick(ListView l, View v, int position, long id) {
    File newFile = (File)l.getItemAtPosition(position);

    if(newFile.isFile()) {
        // Set result
        Intent extra = new Intent();
        extra.putExtra(EXTRA_FILE_PATH, newFile.getAbsolutePath());
        setResult(RESULT_OK, extra);
        // Finish the activity
        finish();
    } else {
        mDirectory = newFile;
        // Update the files list
        refreshFilesList();
    }

    super.onListItemClick(l, v, position, id);
}

private class FilePickerListAdapter extends ArrayAdapter<File> {

    private List<File> mObjects;

    public FilePickerListAdapter(Context context, List<File> objects) {
        super(context, R.layout.file_picker_list_item, android.R.id.text1, objects);
        mObjects = objects;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {

        View row = null;

        if(convertView == null) {
            LayoutInflater inflater = (LayoutInflater)getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            row = inflater.inflate(R.layout.file_picker_list_item, parent, false);
        } else {
            row = convertView;
        }

        File object = mObjects.get(position);

        ImageView imageView = (ImageView)row.findViewById(R.id.file_picker_image);
        TextView textView = (TextView)row.findViewById(R.id.file_picker_text);
        // Set single line
        textView.setSingleLine(true);

        textView.setText(object.getName());
        if(object.isFile()) {
            // Show the file icon
            imageView.setImageResource(R.drawable.file);
        } else {
            // Show the folder icon
            imageView.setImageResource(R.drawable.folder);
        }

        return row;
    }

}

private class FileComparator implements Comparator<File> {
    public int compare(File f1, File f2) {
        if(f1 == f2) {
            return 0;
        }
        if(f1.isDirectory() && f2.isFile()) {
            // Show directories above files
            return -1;
        }
        if(f1.isFile() && f2.isDirectory()) {
            // Show files below directories
            return 1;
        }
        // Sort the directories alphabetically
        return f1.getName().compareToIgnoreCase(f2.getName());
    }
}

private class ExtensionFilenameFilter implements FilenameFilter {
    private String[] mExtensions;

    public ExtensionFilenameFilter(String[] extensions) {
        super();
        mExtensions = extensions;
    }

    public boolean accept(File dir, String filename) {
        if(new File(dir, filename).isDirectory()) {
            // Accept all directory names
            return true;
        }
        if(mExtensions != null && mExtensions.length > 0) {
            for(int i = 0; i < mExtensions.length; i++) {
                if(filename.endsWith(mExtensions[i])) {
                    // The filename ends with the extension
                    return true;
                }
            }
            // The filename did not match any of the extensions
            return false;
        }
        // No extensions has been set. Accept all file extensions.
        return true;
       }
    }
  }

在使用这些类的Andr​​oid应用程序，我能够浏览和选择文件，但我想用PhoneGap的执行这些类。任何人都可以请帮助我如何使用HTML和JS文件中的PhoneGap使用这些类？

In android application using these classes i am able to browse and select files but i want to execute these classes using phonegap. can anyone please help me how to use these classes in phonegap using html and js files?

推荐答案

Communication Android的Java和Javascript的的PhoneGap之间？

这应该为你工作，你需要调用JavaScript中的Java方法。

This should work for you, you need to call JAVA method in javascript.

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