Java tutorial
/************************************************************************************************** Filename: ServiceView.java Revised: $Date: 2014-01-07 16:17:34 +0100 (ti, 07 jan 2014) $ Revision: $Revision: 28784 $ Copyright 2013 Texas Instruments Incorporated. All rights reserved. IMPORTANT: Your use of this Software is limited to those specific rights granted under the terms of a software license agreement between the user who downloaded the software, his/her employer (which must be your employer) and Texas Instruments Incorporated (the "License"). You may not use this Software unless you agree to abide by the terms of the License. The License limits your use, and you acknowledge, that the Software may not be modified, copied or distributed unless used solely and exclusively in conjunction with a Texas Instruments Bluetooth device. Other than for the foregoing purpose, you may not use, reproduce, copy, prepare derivative works of, modify, distribute, perform, display or sell this Software and/or its documentation for any purpose. YOU FURTHER ACKNOWLEDGE AND AGREE THAT THE SOFTWARE AND DOCUMENTATION ARE PROVIDED AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY, TITLE, NON-INFRINGEMENT AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL TEXAS INSTRUMENTS OR ITS LICENSORS BE LIABLE OR OBLIGATED UNDER CONTRACT, NEGLIGENCE, STRICT LIABILITY, CONTRIBUTION, BREACH OF WARRANTY, OR OTHER LEGAL EQUITABLE THEORY ANY DIRECT OR INDIRECT DAMAGES OR EXPENSES INCLUDING BUT NOT LIMITED TO ANY INCIDENTAL, SPECIAL, INDIRECT, PUNITIVE OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY, SERVICES, OR ANY CLAIMS BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), OR OTHER SIMILAR COSTS. Should you have any questions regarding your right to use this Software, contact Texas Instruments Incorporated at www.TI.com **************************************************************************************************/ package ti.android.ble.devicemonitor; import java.util.List; import java.util.UUID; import ti.android.ble.common.BluetoothLeService; import ti.android.ble.common.GattInfo; import ti.android.util.Conversion; import ti.android.util.CustomKeyboard; import android.bluetooth.BluetoothGatt; import android.bluetooth.BluetoothGattCharacteristic; import android.bluetooth.BluetoothGattDescriptor; import android.content.Context; import android.os.Bundle; import android.support.v4.app.Fragment; import android.text.format.Time; import android.util.Log; import android.view.LayoutInflater; import android.view.View; import android.view.View.OnClickListener; import android.view.ViewGroup; import android.widget.AdapterView; import android.widget.AdapterView.OnItemClickListener; import android.widget.BaseAdapter; import android.widget.Button; import android.widget.CheckBox; import android.widget.EditText; import android.widget.ListView; import android.widget.TextView; public class ServiceView extends Fragment implements OnClickListener { // Log private static String TAG = "ServiceView"; // Housekeeping private ServiceActivity mActivity = null; private Context mContext; // GUI private TextView mStatus = null; private EditText mData; private CharAdapter mCharAdapter; private ListView mCharListView; private Button mBtnWrite; private Button mBtnRead; private CheckBox mBtnNotify; private CustomKeyboard mKeyboard; private int mSelectedItem = 0; // GATT private static BluetoothGatt mBtGatt; private static BluetoothLeService mGattService; private List<BluetoothGattCharacteristic> mCharList; private BluetoothGattCharacteristic mChar; private int mProperty = 0; private boolean mNotifyEnabled = false; public ServiceView() { Log.i(TAG, "construct"); } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { Log.i(TAG, "onCreateView"); // The last two arguments ensure LayoutParams are inflated properly. View v = inflater.inflate(R.layout.fragment_service, container, false); mActivity = (ServiceActivity) getActivity(); mContext = mActivity.getApplicationContext(); // Get GATT object and active service object mBtGatt = BluetoothLeService.getBtGatt(); mGattService = BluetoothLeService.getInstance(); mChar = null; // GUI initialization mData = (EditText) v.findViewById(R.id.txt_data); mData.setEnabled(false); mData.setHint(""); mStatus = (TextView) v.findViewById(R.id.txt_status); mBtnRead = (Button) v.findViewById(R.id.btn_read); mBtnRead.setOnClickListener(this); mBtnWrite = (Button) v.findViewById(R.id.btn_write); mBtnWrite.setOnClickListener(this); mBtnNotify = (CheckBox) v.findViewById(R.id.btn_notify); mBtnNotify.setOnClickListener(this); // Characteristics list mCharList = (List<BluetoothGattCharacteristic>) ((ServiceActivity) mActivity).getCharList(); mCharListView = (ListView) v.findViewById(R.id.char_list); mCharListView.setOnItemClickListener(mCharClickListener); mCharAdapter = new CharAdapter(mActivity, mCharList); mCharListView.setAdapter(mCharAdapter); // Hex keyboard mKeyboard = new CustomKeyboard(mActivity, v, R.id.keyboardview, R.xml.hexkbd); mKeyboard.registerEditText(R.id.txt_data); // Notify activity that the view has been expanded mActivity.onServiceViewReady(v); return v; } @Override public void onDestroy() { Log.i(TAG, "onDestroy"); mChar = null; mStatus = null; mCharAdapter = null; super.onDestroy(); } public boolean onBackPressed() { boolean visible; visible = mKeyboard.isVisible(); if (visible) { mKeyboard.hide(); } return visible; } public void onClick(View v) { switch (v.getId()) { case R.id.btn_read: onBtnRead(v); break; case R.id.btn_write: onBtnWrite(v); break; case R.id.btn_notify: onBtnNotify(v); break; default: break; } } public void onBtnRead(View view) { mBtGatt.readCharacteristic(mChar); } public void onBtnNotify(View view) { mNotifyEnabled = mBtnNotify.isChecked(); mGattService.setCharacteristicNotification(mChar, mNotifyEnabled); } public void onBtnWrite(View view) { if (mKeyboard.isVisible()) { mKeyboard.hide(); String str; int len; str = mData.getText().toString(); len = str.length(); switch (len) { case 0: break; case 1: case 2: byte[] data = new byte[1]; data[0] = (byte) Integer.parseInt(str, 16); mChar.setValue(data); mBtGatt.writeCharacteristic(mChar); break; case 3: case 4: data = new byte[2]; short v; v = (short) Integer.parseInt(str, 16); data[0] = Conversion.loUint16(v); data[1] = Conversion.hiUint16(v); mChar.setValue(data); mBtGatt.writeCharacteristic(mChar); break; default: // Multibyte input byte[] value = new byte[len / 2]; Log.d(TAG, str + " " + len); for (int i = 0; i < (len / 2); i++) { int o = i * 2; String t = str.substring(o, o + 2); Log.d(TAG, "Str: " + t); value[i] = (byte) Integer.parseInt(t, 16); Log.d(TAG, "Value: " + value[i]); } mChar.setValue(value); mBtGatt.writeCharacteristic(mChar); break; } } else { mKeyboard.show(null); mKeyboard.setFocus(); } } void notifyDataSetChanged() { setAdapter(); mCharAdapter.notifyDataSetChanged(); } void updateView() { mCharList.clear(); mCharAdapter.notifyDataSetChanged(); } void selectCurrentItem() { setItem(mSelectedItem); } void setItem(int pos) { boolean fHasRead; boolean fHasNotification; boolean fHasWrite; BluetoothGattDescriptor clientConfig; mChar = mCharList.get(pos); mProperty = mChar.getProperties(); fHasRead = (mProperty & BluetoothGattCharacteristic.PROPERTY_READ) > 0; fHasNotification = (mProperty & BluetoothGattCharacteristic.PROPERTY_NOTIFY) > 0; fHasWrite = (mProperty & BluetoothGattCharacteristic.PROPERTY_WRITE) > 0; // Activate input widgets according to char. property mBtnRead.setEnabled(fHasRead); mBtnWrite.setEnabled(fHasWrite); mData.setEnabled(fHasWrite); mBtnNotify.setEnabled(fHasNotification); if (fHasNotification) { mBtnNotify.setTextAppearance(mContext, R.style.checkboxStyle); mBtnNotify.setChecked(mGattService.isNotificationEnabled(mChar)); } else mBtnNotify.setTextAppearance(mContext, R.style.checkboxStyle_Disabled); if (fHasWrite) { mData.setHint(R.string.write_hint); } else { mData.setHint(""); } clientConfig = mChar.getDescriptor(GattInfo.CLIENT_CHARACTERISTIC_CONFIG); if (clientConfig != null) { int perm = clientConfig.getPermissions(); Log.d(TAG, "perm= " + perm); } setStatus(GattInfo.uuidToName(mChar.getUuid())); // Read the characteristic (if applicable) if (fHasRead) { mBtGatt.readCharacteristic(mChar); } // Make sure selection is highlighted mCharAdapter.setSelectedPosition(pos); mActivity.onSelectionUpdate(mChar); } void setStatus(String txt) { if (mStatus != null) { mStatus.setText(timeNowStr() + txt); setStatusStyle(R.style.statusStyle_Busy); } } void setError(String txt) { if (mStatus != null) { mStatus.setText(timeNowStr() + txt); setStatusStyle(R.style.statusStyle_Failure); } } void displayData(byte[] value, byte len) { String txt = new String(value, 0, len - 1); boolean isPrint = Conversion.isAsciiPrintable(txt); if (!isPrint || len <= 4) txt = Conversion.BytetohexString(value, len); mData.setText(txt); } void displayNotif(byte[] value, byte len) { if (mChar != null) { if ((mProperty & BluetoothGattCharacteristic.PROPERTY_NOTIFY) > 0) { // Only show data if selected characteristic has notifications displayData(value, len); } } } private void setAdapter() { mCharList = (List<BluetoothGattCharacteristic>) (mActivity).getCharList(); mCharAdapter = new CharAdapter(mActivity, mCharList); mCharListView.setAdapter(mCharAdapter); } private String timeNowStr() { Time now = new Time(Time.getCurrentTimezone()); now.setToNow(); return now.format("%k:%M:%S") + ": "; } private void setStatusStyle(int style) { if (mStatus != null) mStatus.setTextAppearance(mContext, style); } private String getPropertyDescription(int prop) { String str = new String(); if ((prop & BluetoothGattCharacteristic.PROPERTY_READ) > 0) str += "R"; if ((prop & BluetoothGattCharacteristic.PROPERTY_WRITE) > 0) str += "W"; if ((prop & BluetoothGattCharacteristic.PROPERTY_NOTIFY) > 0) str += "N"; if ((prop & BluetoothGattCharacteristic.PROPERTY_INDICATE) > 0) str += "I"; if ((prop & BluetoothGattCharacteristic.PROPERTY_WRITE_NO_RESPONSE) > 0) str += "*"; if ((prop & BluetoothGattCharacteristic.PROPERTY_BROADCAST) > 0) str += "B"; if ((prop & BluetoothGattCharacteristic.PROPERTY_EXTENDED_PROPS) > 0) str += "E"; if ((prop & BluetoothGattCharacteristic.PROPERTY_SIGNED_WRITE) > 0) str += "S"; return str; } // Listener for characteristic click private OnItemClickListener mCharClickListener = new OnItemClickListener() { public void onItemClick(AdapterView<?> parent, View view, int pos, long id) { // Hide keyboard when selecting a characteristic if (mKeyboard.isVisible()) mKeyboard.hide(); // A characteristic item has been selected mSelectedItem = pos; setItem(pos); } }; // // CLASS ServiceAdapter: handle characteristics list // class CharAdapter extends BaseAdapter { Context mContext; List<BluetoothGattCharacteristic> mChars; LayoutInflater mInflater; int mSelectedPos; public CharAdapter(Context context, List<BluetoothGattCharacteristic> chars) { mInflater = LayoutInflater.from(context); mContext = context; mChars = chars; mSelectedPos = 0; } public int getCount() { return mChars.size(); } public Object getItem(int pos) { return mChars.get(pos); } public long getItemId(int pos) { return pos; } public void setSelectedPosition(int pos) { mSelectedPos = pos; notifyDataSetChanged(); } public int getSelectedPosition() { return mSelectedPos; } public View getView(int pos, View view, ViewGroup parent) { ViewGroup vg; if (view != null) { vg = (ViewGroup) view; } else { vg = (ViewGroup) mInflater.inflate(R.layout.element_characteristic, null); } // Grab characteristic object BluetoothGattCharacteristic charac = mChars.get(pos); int prop = charac.getProperties(); UUID u = charac.getUuid(); // Show name, UUID and properties TextView twName = (TextView) vg.findViewById(R.id.name); twName.setText(GattInfo.uuidToName(u)); ((TextView) vg.findViewById(R.id.uuid)).setText(GattInfo.uuidToString(u)); ((TextView) vg.findViewById(R.id.info)).setText(getPropertyDescription(prop)); // Highlight selected object if (pos == mSelectedPos) { twName.setTextAppearance(mContext, R.style.nameStyleSelected); } else { twName.setTextAppearance(mContext, R.style.nameStyle); } return vg; } } }