MainActivity.java

package iproductive.hortimax.com.test;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.provider.MediaStore;
import android.util.Log;
import android.view.View;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends Activity {
    private TextView _textView;
    private static final int CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE = 100;

    private static MainActivity _instance;
    private static boolean _hasResults = false;
    private static String _resultUrl = "";

    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        _instance = this;
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        _textView = (TextView) findViewById(R.id.TextView);
        _textView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                new Thread(new Runnable() {
                    @Override
                    public void run() {
                        final String photo = MainActivity.takePhoto();

                        _instance.runOnUiThread(new Runnable(){

                            @Override
                            public void run() {
                                _instance._textView.append("\n" + photo);
                            }
                        });
                    }
                }).start();
            }
        });
    }

    public static String takePhoto(){
        _hasResults = false;
        _resultUrl = "";
        _instance.runOnUiThread(new Runnable() {
            @Override
            public void run() {
                // create Intent to take a picture and return control to the calling application
                Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);

                // start the image capture Intent
                _instance.startActivityForResult(intent, CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE);
            }
        });

        while(!_hasResults){
            try {
                Thread.sleep(100, 0);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
        return _resultUrl;
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        if (requestCode == CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE) {
            Log.d("Photo", "Result code: " + resultCode);
            if (resultCode == RESULT_OK) {
                // Image captured and saved to fileUri specified in the Intent
                _resultUrl = data.getData().toString();
                Log.d("Photo", "Result url: " + _resultUrl);
            } else if (resultCode == RESULT_CANCELED) {
                // User cancelled the image capture
                _resultUrl = "";
            } else {
                // Image capture failed, advise user
                Toast.makeText(_instance, "Could not take picture", Toast.LENGTH_LONG);
                _resultUrl = "";
            }
            _hasResults = true;
        }
    }
}