Android Open Source - GizwitsBLE Characteristic Activity

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License

The source code is released under:

Apache License

Java Source Code

package com.example.bluetooth.le;
// w  ww .  j  a  v  a  2 s  .c o  m
import java.util.UUID;

import org.apache.commons.codec.DecoderException;
import org.apache.commons.codec.binary.Hex;

import android.app.Activity;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

import com.xtremeprog.sdk.ble.BleGattCharacteristic;
import com.xtremeprog.sdk.ble.BleService;
import com.xtremeprog.sdk.ble.IBle;

public class CharacteristicActivity extends Activity {

  private String mDeviceAddress;
  private IBle mBle;
  private BleGattCharacteristic mCharacteristic;

  private View.OnClickListener onClickListener = new View.OnClickListener() {

    @Override
    public void onClick(View v) {
      if (v.getId() == R.id.btn_read) {
        mBle.requestReadCharacteristic(mDeviceAddress, mCharacteristic);
      } else if (v.getId() == R.id.btn_notify) {
        if (mNotifyStarted) {
          mBle.requestStopNotification(mDeviceAddress,
              mCharacteristic);
        } else {
          mBle.requestCharacteristicNotification(mDeviceAddress,
              mCharacteristic);
        }
      } else if (v.getId() == R.id.btn_indicate) {
        mBle.requestIndication(mDeviceAddress, mCharacteristic);
      } else if (v.getId() == R.id.btn_write) {
        String val = et_hex.getText().toString();
        try {
          byte[] data = Hex.decodeHex(val.toCharArray());
          mCharacteristic.setValue(data);
          mBle.requestWriteCharacteristic(mDeviceAddress,
              mCharacteristic, "");
        } catch (DecoderException e) {
          e.printStackTrace();
        }
      }
    }
  };

  private final BroadcastReceiver mBleReceiver = new BroadcastReceiver() {
    @Override
    public void onReceive(Context context, Intent intent) {
      Bundle extras = intent.getExtras();
      if (!mDeviceAddress.equals(extras.getString(BleService.EXTRA_ADDR))) {
        return;
      }

      String uuid = extras.getString(BleService.EXTRA_UUID);
      if (uuid != null
          && !mCharacteristic.getUuid().toString().equals(uuid)) {
        return;
      }

      String action = intent.getAction();
      if (BleService.BLE_GATT_DISCONNECTED.equals(action)) {
        Toast.makeText(CharacteristicActivity.this,
            "Device disconnected...", Toast.LENGTH_SHORT).show();
        finish();
      } else if (BleService.BLE_CHARACTERISTIC_READ.equals(action)
          || BleService.BLE_CHARACTERISTIC_CHANGED.equals(action)) {
        byte[] val = extras.getByteArray(BleService.EXTRA_VALUE);
        tv_ascii.setText(new String(val));
        tv_hex.setText("0x" + new String(Hex.encodeHex(val)));
      } else if (BleService.BLE_CHARACTERISTIC_NOTIFICATION
          .equals(action)) {
        Toast.makeText(CharacteristicActivity.this,
            "Notification state changed!", Toast.LENGTH_SHORT)
            .show();
        mNotifyStarted = extras.getBoolean(BleService.EXTRA_VALUE);
        if (mNotifyStarted) {
          btn_notify.setText("Stop Notify");
        } else {
          btn_notify.setText("Start Notify");
        }
      } else if (BleService.BLE_CHARACTERISTIC_INDICATION.equals(action)) {
        Toast.makeText(CharacteristicActivity.this,
            "Indication state changed!", Toast.LENGTH_SHORT).show();
      } else if (BleService.BLE_CHARACTERISTIC_WRITE.equals(action)) {
        Toast.makeText(CharacteristicActivity.this, "Write success!",
            Toast.LENGTH_SHORT).show();
      }
    }
  };
  private TextView tv_ascii;
  private TextView tv_hex;
  private EditText et_hex;
  private boolean mNotifyStarted;
  private Button btn_notify;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_characteristic);

    mDeviceAddress = getIntent().getStringExtra("address");
    String service = getIntent().getStringExtra("service");
    String characteristic = getIntent().getStringExtra("characteristic");
    BleApplication app = (BleApplication) getApplication();
    mBle = app.getIBle();
    mCharacteristic = mBle.getService(mDeviceAddress,
        UUID.fromString(service)).getCharacteristic(
        UUID.fromString(characteristic));
    mNotifyStarted = false;

    TextView tv_name = (TextView) findViewById(R.id.tv_name);
    TextView tv_uuid = (TextView) findViewById(R.id.tv_uuid);
    tv_ascii = (TextView) findViewById(R.id.tv_ascii);
    tv_hex = (TextView) findViewById(R.id.tv_hex);

    tv_name.setText(Utils.BLE_CHARACTERISTICS.containsKey(characteristic) ? Utils.BLE_CHARACTERISTICS
        .get(characteristic) : "unknown characteristic");
    tv_uuid.setText(mCharacteristic.getUuid().toString());

    View btn_read = findViewById(R.id.btn_read);
    btn_notify = (Button) findViewById(R.id.btn_notify);
    View btn_indicate = findViewById(R.id.btn_indicate);
    View ll_write = findViewById(R.id.ll_write);
    View btn_write = findViewById(R.id.btn_write);
    et_hex = (EditText) findViewById(R.id.et_hex);
    btn_read.setOnClickListener(onClickListener);
    btn_notify.setOnClickListener(onClickListener);
    btn_indicate.setOnClickListener(onClickListener);
    btn_write.setOnClickListener(onClickListener);

    final int charaProp = mCharacteristic.getProperties();
    if ((charaProp & BleGattCharacteristic.PROPERTY_READ) > 0) {
      btn_read.setVisibility(View.VISIBLE);
    }
    if ((charaProp & BleGattCharacteristic.PROPERTY_NOTIFY) > 0) {
      btn_notify.setVisibility(View.VISIBLE);
    }
    if ((charaProp & BleGattCharacteristic.PROPERTY_INDICATE) > 0) {
      btn_indicate.setVisibility(View.VISIBLE);
    }
    if ((charaProp & BleGattCharacteristic.PROPERTY_WRITE) > 0) {
      ll_write.setVisibility(View.VISIBLE);
    }
  }

  @Override
  public boolean onCreateOptionsMenu(Menu menu) {

    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.characteristic, menu);
    return true;
  }

  @Override
  public boolean onOptionsItemSelected(MenuItem item) {
    // Handle action bar item clicks here. The action bar will
    // automatically handle clicks on the Home/Up button, so long
    // as you specify a parent activity in AndroidManifest.xml.
    int id = item.getItemId();
    if (id == R.id.action_settings) {
      return true;
    }
    return super.onOptionsItemSelected(item);
  }

  @Override
  protected void onResume() {
    super.onResume();
    registerReceiver(mBleReceiver, BleService.getIntentFilter());
  }

  @Override
  public void onPanelClosed(int featureId, Menu menu) {
    super.onPanelClosed(featureId, menu);
    unregisterReceiver(mBleReceiver);
  }
}

Java Source Code List

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