Android Open Source - wireless-barcode-scanner Menu Activity

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From Project

Back to project page wireless-barcode-scanner.

License

The source code is released under:

GNU General Public License

Java Source Code

package de.zwiebelchen.wirelessbarcodescanner;
//from  w ww .  j  ava 2 s.c o m
import android.app.Activity;
import android.app.AlertDialog;
import android.content.ComponentName;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.ServiceConnection;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.net.wifi.WifiInfo;
import android.net.wifi.WifiManager;
import android.os.Bundle;
import android.os.IBinder;
import android.preference.PreferenceManager;
import android.text.format.Formatter;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;

import com.google.zxing.integration.android.IntentIntegrator;
import com.google.zxing.integration.android.IntentResult;

import de.zwiebelchen.wirelessbarcodescanner.ServerService.LocalBinder;

public class MenuActivity extends Activity {
  
  private static final int RESULT_SETTINGS = 1;
  
  protected void noWifiEnabled() {

    AlertDialog.Builder builder = new AlertDialog.Builder(this);
    builder.setTitle(R.string.noWifiTitle);
    builder.setMessage(R.string.noWifiMessage);
    builder.setCancelable(true);
    builder.setNeutralButton(android.R.string.ok,
            new DialogInterface.OnClickListener() {
        @Override
      public void onClick(DialogInterface dialog, int id) {
            MenuActivity.this.finish();
        }
    });
      AlertDialog alert = builder.create();
      alert.show();
  }
  
  @Override
  public void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          setContentView(R.layout.menu);
          
          Button cmdStartScanning = (Button) findViewById(R.id.cmdStartScanning);
          cmdStartScanning.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
          if (isConnected(MenuActivity.this)) {
            doScan();
          }
        }
            
          });
          
          if (!isConnected(this)) {
            noWifiEnabled();
            if (mService != null) {
              unbindService(mConnection);
            mService = null;
            }
          }
          else {
            final WifiManager wifiMgr = (WifiManager) getSystemService(WIFI_SERVICE);
            final WifiInfo wifiInfo = wifiMgr.getConnectionInfo();
            int ip = wifiInfo.getIpAddress();
            String ipAddress = Formatter.formatIpAddress(ip);
            
            TextView port = (TextView) findViewById(R.id.txtPort);
            TextView ipAddr = (TextView) findViewById(R.id.txtIpAddr);
            
            SharedPreferences sharedPrefs = PreferenceManager
                .getDefaultSharedPreferences(this);
            
            if (sharedPrefs.getString("port", null) == null || sharedPrefs.getString("port", null).equals("")) {
              Editor e = sharedPrefs.edit();
              e.putString("port", "1234");
              e.commit();
            }
            
            port.setText(sharedPrefs.getString("port", null));
            ipAddr.setText(ipAddress);
            
          }
          
  }
  
  private boolean isConnected(Context context) {
      ConnectivityManager connectivityManager = (ConnectivityManager)
          context.getSystemService(Context.CONNECTIVITY_SERVICE);
      NetworkInfo networkInfo = null;
      if (connectivityManager != null) {
          networkInfo =
              connectivityManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
      }
      return networkInfo == null ? false : networkInfo.isConnected();
  }
  
  @Override
  protected void onSaveInstanceState(Bundle outState) {
    super.onSaveInstanceState(outState);
  }
  
  @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.layout.settings, menu);
        return true;
    }
  
  @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        
        if (requestCode == RESULT_SETTINGS) {
          settingsChanged();
          return;
        }
        else if (requestCode == IntentIntegrator.REQUEST_CODE){
          IntentResult scanningResult = IntentIntegrator.parseActivityResult(
            requestCode, resultCode, data);

          SharedPreferences sharedPrefs = PreferenceManager
                  .getDefaultSharedPreferences(this);
          
          boolean batchScanning = sharedPrefs.getBoolean("batchScan", false);
          
        if (resultCode == RESULT_OK) {
          if (scanningResult != null) {
            if (mService != null) {
              mService.sendString(scanningResult.getContents());
            }
          }
          if (batchScanning) {
            doScan();
          }
        }
          
        }
        
    }
  
  private void settingsChanged() {
    TextView txtPort = (TextView) findViewById(R.id.txtPort);
    SharedPreferences sharedPrefs = PreferenceManager
                .getDefaultSharedPreferences(this);
    txtPort.setText(sharedPrefs.getString("port", null));
    if (mService != null) {
      int oldPort = mService.getPort();
      int newPort = Integer.parseInt(sharedPrefs.getString("port", null));
      if (oldPort != newPort) {
        mService.setPort(newPort);
      }
      
    }
  }
 
    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
 
        case R.id.menu_settings:
            Intent i = new Intent(this, SettingsActivity.class);
            startActivityForResult(i, RESULT_SETTINGS);
            break;
            
        case R.id.startScanning:
          doScan();
          break; 
        }
 
        return true;
    }
    
    private void doScan() {
      if (mService != null) {
        IntentIntegrator scanIntegrator;
        scanIntegrator = new IntentIntegrator(this);

        scanIntegrator.initiateScan();
      }
    }
    
  @Override
  protected void onStart() {
    super.onStart();
    Intent intent = new Intent(this, ServerService.class);
    bindService(intent, mConnection, Context.BIND_AUTO_CREATE);
  }
  
  @Override
  protected void onDestroy() {
    super.onDestroy();
    if (mService != null) {
      unbindService(mConnection);
      mService = null;
    }
  }

  private ServerService mService = null;

  private final ServiceConnection mConnection = new ServiceConnection() {
    @Override
    public void onServiceConnected(ComponentName name, IBinder service) {
      LocalBinder binder = (LocalBinder) service;
      mService = binder.getService();
    }

    @Override
    public void onServiceDisconnected(ComponentName name) {
      mService = null;
    }
  };

}

Java Source Code List

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