Android Open Source - barcodescanner Scanner Fragment

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License

The source code is released under:
Apache License
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Java Source Code

package me.dm7.barcodescanner.zbar.sample;
/*from  w ww. j av a 2s.  co m*/
import android.media.Ringtone;
import android.media.RingtoneManager;
import android.net.Uri;
import android.os.Bundle;
import android.support.v4.app.DialogFragment;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.view.MenuItemCompat;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;

import java.util.ArrayList;
import java.util.List;

import me.dm7.barcodescanner.zbar.BarcodeFormat;
import me.dm7.barcodescanner.zbar.Result;
import me.dm7.barcodescanner.zbar.ZBarScannerView;

public class ScannerFragment extends Fragment implements MessageDialogFragment.MessageDialogListener,
        ZBarScannerView.ResultHandler, FormatSelectorDialogFragment.FormatSelectorDialogListener {
    private static final String FLASH_STATE = "FLASH_STATE";
    private static final String AUTO_FOCUS_STATE = "AUTO_FOCUS_STATE";
    private static final String SELECTED_FORMATS = "SELECTED_FORMATS";
    private ZBarScannerView mScannerView;
    private boolean mFlash;
    private boolean mAutoFocus;
    private ArrayList<Integer> mSelectedIndices;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle state) {
        mScannerView = new ZBarScannerView(getActivity());
        if(state != null) {
            mFlash = state.getBoolean(FLASH_STATE, false);
            mAutoFocus = state.getBoolean(AUTO_FOCUS_STATE, true);
            mSelectedIndices = state.getIntegerArrayList(SELECTED_FORMATS);
        } else {
            mFlash = false;
            mAutoFocus = true;
            mSelectedIndices = null;
        }
        setupFormats();
        return mScannerView;
    }

    @Override
    public void onCreate(Bundle state) {
        super.onCreate(state);
        setHasOptionsMenu(true);
    }

    public void onCreateOptionsMenu (Menu menu, MenuInflater inflater) {
        super.onCreateOptionsMenu(menu, inflater);

        MenuItem menuItem;

        if(mFlash) {
            menuItem = menu.add(Menu.NONE, R.id.menu_flash, 0, R.string.flash_on);
        } else {
            menuItem = menu.add(Menu.NONE, R.id.menu_flash, 0, R.string.flash_off);
        }
        MenuItemCompat.setShowAsAction(menuItem, MenuItem.SHOW_AS_ACTION_ALWAYS);


        if(mAutoFocus) {
            menuItem = menu.add(Menu.NONE, R.id.menu_auto_focus, 0, R.string.auto_focus_on);
        } else {
            menuItem = menu.add(Menu.NONE, R.id.menu_auto_focus, 0, R.string.auto_focus_off);
        }
        MenuItemCompat.setShowAsAction(menuItem, MenuItem.SHOW_AS_ACTION_ALWAYS);

        menuItem = menu.add(Menu.NONE, R.id.menu_formats, 0, R.string.formats);
        MenuItemCompat.setShowAsAction(menuItem, MenuItem.SHOW_AS_ACTION_ALWAYS);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle presses on the action bar items
        switch (item.getItemId()) {
            case R.id.menu_flash:
                mFlash = !mFlash;
                if(mFlash) {
                    item.setTitle(R.string.flash_on);
                } else {
                    item.setTitle(R.string.flash_off);
                }
                mScannerView.setFlash(mFlash);
                return true;
            case R.id.menu_auto_focus:
                mAutoFocus = !mAutoFocus;
                if(mAutoFocus) {
                    item.setTitle(R.string.auto_focus_on);
                } else {
                    item.setTitle(R.string.auto_focus_off);
                }
                mScannerView.setAutoFocus(mAutoFocus);
                return true;
            case R.id.menu_formats:
                DialogFragment fragment = FormatSelectorDialogFragment.newInstance(this, mSelectedIndices);
                fragment.show(getActivity().getSupportFragmentManager(), "format_selector");
            default:
                return super.onOptionsItemSelected(item);
        }
    }

    @Override
    public void onResume() {
        super.onResume();
        mScannerView.setResultHandler(this);
        mScannerView.startCamera();
        mScannerView.setFlash(mFlash);
        mScannerView.setAutoFocus(mAutoFocus);
    }

    @Override
    public void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);
        outState.putBoolean(FLASH_STATE, mFlash);
        outState.putBoolean(AUTO_FOCUS_STATE, mAutoFocus);
        outState.putIntegerArrayList(SELECTED_FORMATS, mSelectedIndices);
    }

    @Override
    public void handleResult(Result rawResult) {
        try {
            Uri notification = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
            Ringtone r = RingtoneManager.getRingtone(getActivity().getApplicationContext(), notification);
            r.play();
        } catch (Exception e) {}
        showMessageDialog("Contents = " + rawResult.getContents() + ", Format = " + rawResult.getBarcodeFormat().getName());
    }

    public void showMessageDialog(String message) {
        DialogFragment fragment = MessageDialogFragment.newInstance("Scan Results", message, this);
        fragment.show(getActivity().getSupportFragmentManager(), "scan_results");
    }

    public void closeMessageDialog() {
        closeDialog("scan_results");
    }

    public void closeFormatsDialog() {
        closeDialog("format_selector");
    }

    public void closeDialog(String dialogName) {
        FragmentManager fragmentManager = getActivity().getSupportFragmentManager();
        DialogFragment fragment = (DialogFragment) fragmentManager.findFragmentByTag(dialogName);
        if(fragment != null) {
            fragment.dismiss();
        }
    }

    @Override
    public void onDialogPositiveClick(DialogFragment dialog) {
        // Resume the camera
        mScannerView.startCamera();
        mScannerView.setFlash(mFlash);
        mScannerView.setAutoFocus(mAutoFocus);
    }

    @Override
    public void onFormatsSaved(ArrayList<Integer> selectedIndices) {
        mSelectedIndices = selectedIndices;
        setupFormats();
    }

    public void setupFormats() {
        List<BarcodeFormat> formats = new ArrayList<BarcodeFormat>();
        if(mSelectedIndices == null || mSelectedIndices.isEmpty()) {
            mSelectedIndices = new ArrayList<Integer>();
            for(int i = 0; i < BarcodeFormat.ALL_FORMATS.size(); i++) {
                mSelectedIndices.add(i);
            }
        }

        for(int index : mSelectedIndices) {
            formats.add(BarcodeFormat.ALL_FORMATS.get(index));
        }
        if(mScannerView != null) {
            mScannerView.setFormats(formats);
        }
    }

    @Override
    public void onPause() {
        super.onPause();
        mScannerView.stopCamera();
        closeMessageDialog();
        closeFormatsDialog();
    }
}
Java Source Code List
