如何使用Android的Java类的PhoneGap？ [英] How to use android java classes in 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

<一个href="http://stackoverflow.com/questions/2727763/communication-between-android-java-and-phonegap-javascript">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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