自動連接使用的是SharedPreferences這個來解決。

private void Automaticconnection() {

SharedPreferences sp = getSharedPreferences("Dizhi", MODE_PRIVATE);

String address = sp.getString("address", "");

if (!address.equals("")) {

pro = new ProgressDialog(SetActivity.this);

pro.setMessage("正在連接設備...");

pro.show();

BluetoothDevice device = mBluetoothAdapter.getRemoteDevice(address);

mChatService.connect(device);

}

}第一次保存空字符串,也就是沒有值，需要你先連接設備后才能保存！這里保存的值是設備地址?EXTRA_DEVICE_ADDRESS。

上面代碼就是出現一個對話框，等連接成功了對話框就消失。

其次是在onActivityResult方法中的處理：

protected void onActivityResult(int requestCode, int resultCode, Intent data) {

switch (requestCode) {

case REQUEST_CONNECT_DEVICE:

if (resultCode == Activity.RESULT_OK) {

pro = new ProgressDialog(SetActivity.this);

pro.setMessage("正在連接設備...");

pro.show();

String address = data.getExtras().getString(

DeviceListActivity.EXTRA_DEVICE_ADDRESS);

SharedPreferences sp = getSharedPreferences("Dizhi",

MODE_PRIVATE);

String addresscompare = sp.getString("address", "");

if (Uitils.isConnect) {

if (addresscompare.equals(address)) {

Toast.makeText(getApplicationContext(), "已經連接了設備",

Toast.LENGTH_SHORT).show();

pro.dismiss();

}

} else {

Editor editor = sp.edit();

editor.putString("address", address);

editor.commit();

BluetoothDevice device = mBluetoothAdapter

.getRemoteDevice(address);

mChatService.connect(device);

System.out.println("mChatService.connect(device)");

}

}

break;

case REQUEST_ENABLE_BT:

if (resultCode != Activity.RESULT_OK) {

Toast.makeText(this, R.string.blutooth_unopen,

Toast.LENGTH_SHORT).show();

finish();

}

break;

}

super.onActivityResult(requestCode, resultCode, data);

}

先顯示對話框,然后讀取地址來保存。保存結束后調用mChatService.connect(device);連接設備。

至于對話框的關閉，因為在使用bluetoothchat的時候，你需要使用一個handler來接受消息，你可以在接受到連接成功的消息后來關閉對話框。