How To Call Android Activities Into Phonegap Html?

I have recently started working on phonegap and i came across a task in which i need to browse for a file from android mobile and display the path of selected file. I've searched a

Solution 1:

You need to create a helper class something like:

public class HelperClass extends Plugin implements OnClickListener 

    protected static final String TAG = null;
    private DroidGap mGap;
    public HelperClass(DroidGap gap, WebView view)
    {
        mGap = gap;
    }   
       @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

    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:
        Intent intent = new Intent(this, FilePickerActivity.class);
        startActivityForResult(intent, REQUEST_PICK_FILE);
        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)) {
                    selectedFile = new     File(data.getStringExtra(FilePickerActivity.EXTRA_FILE_PATH));
                    mFilePathTextView.setText(selectedFile.getPath());  

            }
        }
    }
}

@Override
public PluginResult execute(String arg0, JSONArray arg1, String arg2) {
    // TODO Auto-generated method stub
    return null;
}

}

then your main activity needs to be something like:

        public class MainActivity extends DroidGap {
    /** Called when the activity is first created. */
HelperClass cna;
    @Override
    public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);      
    super.init();    
    cna = new HelperClass(this, appView);    
    appView.addJavascriptInterface(cna, "HelperClass");      
    super.loadUrl("file:///android_asset/www/index.html");
    }
}