Android Open Source - AndroBluetooth Main Activity

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From Project

Back to project page AndroBluetooth.

License

The source code is released under:

Apache License

Java Source Code

package net.londatiga.android.bluetooth;
/*  ww w .ja va  2 s  .c o  m*/
import java.util.ArrayList;
import java.util.Set;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.IntentFilter;

import android.graphics.Color;
import android.os.Bundle;
import android.view.View;

import android.app.Activity;
import android.app.ProgressDialog;

import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;

import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;

/**
 * Main activity.
 * 
 * @author Lorensius W. L. T <lorenz@londatiga.net>
 *
 */
public class MainActivity extends Activity {
  private TextView mStatusTv;
  private Button mActivateBtn;
  private Button mPairedBtn;
  private Button mScanBtn;
  
  private ProgressDialog mProgressDlg;
  
  private ArrayList<BluetoothDevice> mDeviceList = new ArrayList<BluetoothDevice>();
  
  private BluetoothAdapter mBluetoothAdapter;
  
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    
    setContentView(R.layout.activity_main);
    
    mStatusTv       = (TextView) findViewById(R.id.tv_status);
    mActivateBtn     = (Button) findViewById(R.id.btn_enable);
    mPairedBtn       = (Button) findViewById(R.id.btn_view_paired);
    mScanBtn       = (Button) findViewById(R.id.btn_scan);
    
    mBluetoothAdapter  = BluetoothAdapter.getDefaultAdapter();
    
    mProgressDlg     = new ProgressDialog(this);
    
    mProgressDlg.setMessage("Scanning...");
    mProgressDlg.setCancelable(false);
    mProgressDlg.setButton(DialogInterface.BUTTON_NEGATIVE, "Cancel", new DialogInterface.OnClickListener() {
        @Override
        public void onClick(DialogInterface dialog, int which) {
            dialog.dismiss();
            
            mBluetoothAdapter.cancelDiscovery();
        }
    });
    
    if (mBluetoothAdapter == null) {
      showUnsupported();
    } else {
      mPairedBtn.setOnClickListener(new View.OnClickListener() {        
        @Override
        public void onClick(View v) {
          Set<BluetoothDevice> pairedDevices = mBluetoothAdapter.getBondedDevices();
          
          if (pairedDevices == null || pairedDevices.size() == 0) { 
            showToast("No Paired Devices Found");
          } else {
            ArrayList<BluetoothDevice> list = new ArrayList<BluetoothDevice>();
            
            list.addAll(pairedDevices);
            
            Intent intent = new Intent(MainActivity.this, DeviceListActivity.class);
            
            intent.putParcelableArrayListExtra("device.list", list);
            
            startActivity(intent);            
          }
        }
      });
      
      mScanBtn.setOnClickListener(new View.OnClickListener() {        
        @Override
        public void onClick(View arg0) {
          mBluetoothAdapter.startDiscovery();
        }
      });
      
      mActivateBtn.setOnClickListener(new View.OnClickListener() {        
        @Override
        public void onClick(View v) {
          if (mBluetoothAdapter.isEnabled()) {
            mBluetoothAdapter.disable();
            
            showDisabled();
          } else {
            Intent intent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
            
              startActivityForResult(intent, 1000);
          }
        }
      });
      
      if (mBluetoothAdapter.isEnabled()) {
        showEnabled();
      } else {
        showDisabled();
      }
    }
    
    IntentFilter filter = new IntentFilter();
    
    filter.addAction(BluetoothAdapter.ACTION_STATE_CHANGED);
    filter.addAction(BluetoothDevice.ACTION_FOUND);
    filter.addAction(BluetoothAdapter.ACTION_DISCOVERY_STARTED);
    filter.addAction(BluetoothAdapter.ACTION_DISCOVERY_FINISHED);
    
    registerReceiver(mReceiver, filter);
  }
  
  @Override
  public void onPause() {
    if (mBluetoothAdapter != null) {
      if (mBluetoothAdapter.isDiscovering()) {
        mBluetoothAdapter.cancelDiscovery();
      }
    }
    
    super.onPause();
  }
  
  @Override
  public void onDestroy() {
    unregisterReceiver(mReceiver);
    
    super.onDestroy();
  }
  
  private void showEnabled() {
    mStatusTv.setText("Bluetooth is On");
    mStatusTv.setTextColor(Color.BLUE);
    
    mActivateBtn.setText("Disable");    
    mActivateBtn.setEnabled(true);
    
    mPairedBtn.setEnabled(true);
    mScanBtn.setEnabled(true);
  }
  
  private void showDisabled() {
    mStatusTv.setText("Bluetooth is Off");
    mStatusTv.setTextColor(Color.RED);
    
    mActivateBtn.setText("Enable");
    mActivateBtn.setEnabled(true);
    
    mPairedBtn.setEnabled(false);
    mScanBtn.setEnabled(false);
  }
  
  private void showUnsupported() {
    mStatusTv.setText("Bluetooth is unsupported by this device");
    
    mActivateBtn.setText("Enable");
    mActivateBtn.setEnabled(false);
    
    mPairedBtn.setEnabled(false);
    mScanBtn.setEnabled(false);
  }
  
  private void showToast(String message) {
    Toast.makeText(getApplicationContext(), message, Toast.LENGTH_SHORT).show();
  }
  
  private final BroadcastReceiver mReceiver = new BroadcastReceiver() {
      public void onReceive(Context context, Intent intent) {        
          String action = intent.getAction();
          
          if (BluetoothAdapter.ACTION_STATE_CHANGED.equals(action)) {
            final int state = intent.getIntExtra(BluetoothAdapter.EXTRA_STATE, BluetoothAdapter.ERROR);
             
            if (state == BluetoothAdapter.STATE_ON) {
              showToast("Enabled");
               
              showEnabled();
             }
          } else if (BluetoothAdapter.ACTION_DISCOVERY_STARTED.equals(action)) {
            mDeviceList = new ArrayList<BluetoothDevice>();
        
        mProgressDlg.show();
          } else if (BluetoothAdapter.ACTION_DISCOVERY_FINISHED.equals(action)) {
            mProgressDlg.dismiss();
            
            Intent newIntent = new Intent(MainActivity.this, DeviceListActivity.class);
            
            newIntent.putParcelableArrayListExtra("device.list", mDeviceList);
        
        startActivity(newIntent);
          } else if (BluetoothDevice.ACTION_FOUND.equals(action)) {
            BluetoothDevice device = (BluetoothDevice) intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
            
            mDeviceList.add(device);
            
            showToast("Found device " + device.getName());
          }
      }
  };

}

Java Source Code List

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