Android Open Source - BLEService Characteristic Details Adapter

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License

The source code is released under:
Copyright (c) 2014, Ratio LLC. All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: ...
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Java Source Code

package org.bluetooth.bledemo;
/*from   w  w  w.  j av  a  2s  .com*/
import java.util.Locale;
import android.bluetooth.BluetoothGattCharacteristic;

import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.CompoundButton;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.ToggleButton;

public class CharacteristicDetailsAdapter extends BaseAdapter {
     
  private BluetoothGattCharacteristic mCharacteristic = null;
  private LayoutInflater mInflater;
  private BleWrapper mBleWrapper = null;
  private byte[] mRawValue = null;
  private int mIntValue = 0;
  private String mAsciiValue = "";
  private String mStrValue = "";
  private String mLastUpdateTime = "";
  private boolean mNotificationEnabled = false;
  
  public CharacteristicDetailsAdapter(PeripheralActivity parent, BleWrapper ble) {
    super();
    mBleWrapper = ble;
    mInflater = parent.getLayoutInflater();
  }
  
  public void setCharacteristic(BluetoothGattCharacteristic ch) {
    this.mCharacteristic = ch;
    mRawValue = null;
    mIntValue = 0;
    mAsciiValue = "";
    mStrValue = "";
    mLastUpdateTime = "-";
    mNotificationEnabled = false;
  }
  
  public BluetoothGattCharacteristic getCharacteristic(int index) {
    return mCharacteristic;
  }

  public void clearCharacteristic() {
    mCharacteristic = null;
  }
  
  @Override
  public int getCount() {
    return (mCharacteristic != null) ? 1 : 0;
  }

  @Override
  public Object getItem(int position) {
    return mCharacteristic;
  }

  @Override
  public long getItemId(int position) {
    return position;
  }

  public void newValueForCharacteristic(final BluetoothGattCharacteristic ch, final String strVal, final int intVal, final byte[] rawValue, final String timestamp) {
    if(!ch.equals(this.mCharacteristic)) return;
    
    mIntValue = intVal;
    mStrValue = strVal;
    mRawValue = rawValue;
        if (mRawValue != null && mRawValue.length > 0) {
            final StringBuilder stringBuilder = new StringBuilder(mRawValue.length);
            for(byte byteChar : mRawValue)
                stringBuilder.append(String.format("%02X", byteChar));
            mAsciiValue = "0x" + stringBuilder.toString();
        }
        else mAsciiValue = "";
        
        mLastUpdateTime = timestamp;
        if(mLastUpdateTime == null) mLastUpdateTime = "";
  }
  
  public void setNotificationEnabledForService(final BluetoothGattCharacteristic ch) {
    if((!ch.equals(this.mCharacteristic)) || (mNotificationEnabled == true)) return;
    mNotificationEnabled = true;
    notifyDataSetChanged();
  }
  
  public byte[] parseHexStringToBytes(final String hex) {
    String tmp = hex.substring(2).replaceAll("[^[0-9][a-f]]", "");
    byte[] bytes = new byte[tmp.length() / 2]; // every two letters in the string are one byte finally
    
    String part = "";
    
    for(int i = 0; i < bytes.length; ++i) {
      part = "0x" + tmp.substring(i*2, i*2+2);
      bytes[i] = Long.decode(part).byteValue();
    }
    
    return bytes;
  }
  
  @Override
  public View getView(int position, View convertView, ViewGroup p) {
    // get already available view or create new if necessary
    FieldReferences fields;
        if (convertView == null) {
          convertView = mInflater.inflate(R.layout.peripheral_details_characteristic_item, null);
          fields = new FieldReferences();
          fields.charPeripheralName = (TextView)convertView.findViewById(R.id.char_details_peripheral_name);
          fields.charPeripheralAddress = (TextView)convertView.findViewById(R.id.char_details_peripheral_address);
          fields.charServiceName = (TextView)convertView.findViewById(R.id.char_details_service);
          fields.charServiceUuid = (TextView)convertView.findViewById(R.id.char_details_service_uuid);
          fields.charName = (TextView)convertView.findViewById(R.id.char_details_name);
          fields.charUuid = (TextView)convertView.findViewById(R.id.char_details_uuid);
          
          fields.charDataType = (TextView)convertView.findViewById(R.id.char_details_type);
          fields.charProperties = (TextView) convertView.findViewById(R.id.char_details_properties);
          
          fields.charStrValue = (TextView) convertView.findViewById(R.id.char_details_ascii_value);
          fields.charDecValue = (TextView) convertView.findViewById(R.id.char_details_decimal_value);
          fields.charHexValue = (EditText) convertView.findViewById(R.id.char_details_hex_value);
          fields.charDateValue = (TextView) convertView.findViewById(R.id.char_details_timestamp);
          
          fields.notificationBtn = (ToggleButton) convertView.findViewById(R.id.char_details_notification_switcher);
          fields.readBtn = (Button) convertView.findViewById(R.id.char_details_read_btn);
          fields.writeBtn = (Button) convertView.findViewById(R.id.char_details_write_btn);
          fields.writeBtn.setTag(fields.charHexValue);
          
          fields.readBtn.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
          mBleWrapper.requestCharacteristicValue(mCharacteristic);
        }
      });

          fields.writeBtn.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
          EditText hex = (EditText) v.getTag();
          String newValue =  hex.getText().toString().toLowerCase(Locale.getDefault());
          byte[] dataToWrite = parseHexStringToBytes(newValue);

          mBleWrapper.writeDataToCharacteristic(mCharacteristic, dataToWrite);
        }
      });            
          
          fields.notificationBtn.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
        public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
          if(isChecked == mNotificationEnabled) return; // no need to update anything

          mBleWrapper.setNotificationForCharacteristic(mCharacteristic, isChecked);
          mNotificationEnabled = isChecked;
        }
      } );
          
            convertView.setTag(fields);
        } else {
            fields = (FieldReferences) convertView.getTag();
        }      
    
        // set proper values into the view
        fields.charPeripheralName.setText(mBleWrapper.getDevice().getName());
        fields.charPeripheralAddress.setText(mBleWrapper.getDevice().getAddress());
        
        String tmp = mCharacteristic.getService().getUuid().toString().toLowerCase(Locale.getDefault());
        fields.charServiceUuid.setText(tmp);
        fields.charServiceName.setText(BleNamesResolver.resolveServiceName(tmp));
        
        String uuid = mCharacteristic.getUuid().toString().toLowerCase(Locale.getDefault());
        String name = BleNamesResolver.resolveCharacteristicName(uuid);
        
        fields.charName.setText(name);
        fields.charUuid.setText(uuid);
        
        int format = mBleWrapper.getValueFormat(mCharacteristic);
        fields.charDataType.setText(BleNamesResolver.resolveValueTypeDescription(format));
        int props = mCharacteristic.getProperties();
        String propertiesString = String.format("0x%04X [", props);
        if((props & BluetoothGattCharacteristic.PROPERTY_READ) != 0) propertiesString += "read ";
        if((props & BluetoothGattCharacteristic.PROPERTY_WRITE) != 0) propertiesString += "write ";
        if((props & BluetoothGattCharacteristic.PROPERTY_NOTIFY) != 0) propertiesString += "notify ";
        if((props & BluetoothGattCharacteristic.PROPERTY_INDICATE) != 0) propertiesString += "indicate ";
        if((props & BluetoothGattCharacteristic.PROPERTY_WRITE_NO_RESPONSE) != 0) propertiesString += "write_no_response ";
        fields.charProperties.setText(propertiesString + "]");
        
        fields.notificationBtn.setEnabled((props & BluetoothGattCharacteristic.PROPERTY_NOTIFY) != 0);
        fields.notificationBtn.setChecked(mNotificationEnabled);
        fields.readBtn.setEnabled((props & BluetoothGattCharacteristic.PROPERTY_READ) != 0);
        fields.writeBtn.setEnabled((props & (BluetoothGattCharacteristic.PROPERTY_WRITE | BluetoothGattCharacteristic.PROPERTY_WRITE_NO_RESPONSE)) != 0);
        fields.charHexValue.setEnabled(fields.writeBtn.isEnabled());
        
        fields.charHexValue.setText(mAsciiValue);
        fields.charStrValue.setText(mStrValue);
        fields.charDecValue.setText(String.format("%d", mIntValue));
        fields.charDateValue.setText(mLastUpdateTime);
   
        return convertView;
  }
      
  private class FieldReferences {
    TextView charPeripheralName;
    TextView charPeripheralAddress;
    TextView charServiceName;
    TextView charServiceUuid;
    TextView charUuid;
    TextView charName;
    TextView charDataType;
    TextView charStrValue;
    EditText charHexValue;
    TextView charDecValue;
    TextView charDateValue;
    TextView charProperties;
    
    ToggleButton notificationBtn;
    Button readBtn;
    Button writeBtn;
  }
}
Java Source Code List
