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나는 안드로이드 애플 리케이션에서 일하고있다. 이 앱은 블루투스를 통해 하나의 기기를 찾아 연결해야하며 작동하지 않습니다.누군가 내 코드가 ACTION_DISCOVERY_STARTED에 도달하지 않는 이유를 알고 있습니까?
버튼을 클릭하여 장치를 찾으면 작동하지 않습니다. 나는,이 작업에서는 : 여기
내 코드입니다 :package com.example.alvar.graficos;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
import java.util.ArrayList;
import java.util.List;
public class Bluetooth extends ActionBarActivity {
private Button btnBluetooth;
private Button btnBuscarDispositivo;
private ListView lvDispositivos;
private BluetoothAdapter bAdapter;
private BroadcastReceiver bReceiver;
private List<BluetoothDevice> arrayDevices;
private static final int REQUEST_ENABLE_BT = 1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_bluetooth);
btnBluetooth = (Button)findViewById(R.id.btnBluetooth);
btnBuscarDispositivo = (Button)findViewById(R.id.btnBuscarDispositivo);
lvDispositivos = (ListView)findViewById(R.id.lvDispositivos);
bAdapter = BluetoothAdapter.getDefaultAdapter();
arrayDevices = new ArrayList<BluetoothDevice>();
((Button) findViewById(R.id.btnBluetooth)).setText(R.string.ActivarBluetooth);
bReceiver = new BroadcastReceiver(){
@Override
public void onReceive(Context context, Intent intent){
String action = intent.getAction();
int estado = intent.getIntExtra(BluetoothAdapter.EXTRA_STATE,BluetoothAdapter.ERROR);
switch (action){
case BluetoothAdapter.ACTION_STATE_CHANGED: {
switch (estado){
case BluetoothAdapter.STATE_OFF:{
((Button)findViewById(R.id.btnBluetooth)).setText(R.string.ActivarBluetooth);
break;
}
case BluetoothAdapter.STATE_ON: {
((Button) findViewById(R.id.btnBluetooth)).setText(R.string.DesactivarBluetooth);
Intent discoverableIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE);
discoverableIntent.putExtra(BluetoothAdapter.EXTRA_DISCOVERABLE_DURATION, 120);
startActivity(discoverableIntent);
break;
}
default: break;
}
}
case BluetoothDevice.ACTION_FOUND:{
if(arrayDevices == null) {
arrayDevices = new ArrayList<BluetoothDevice>();
}
BluetoothDevice dispositivo = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
arrayDevices.add(dispositivo);
String descripcionDispositivo = dispositivo.getName() + " [" + dispositivo.getAddress() + "]";
Toast.makeText(getBaseContext(), "Dispositivo detectado: " + descripcionDispositivo, Toast.LENGTH_SHORT).show();
break;
}
case BluetoothAdapter.ACTION_DISCOVERY_STARTED:{
((TextView) findViewById(R.id.estado)).setText("Buscando dispositivos");
break;
}
case BluetoothAdapter.ACTION_DISCOVERY_FINISHED:{
((TextView)findViewById(R.id.estado)).setText("Busqueda terminada");
ArrayAdapter arrayAdapter = new BluetoothDeviceArrayAdapter(getBaseContext(), android.R.layout.simple_list_item_2, arrayDevices);
lvDispositivos.setAdapter(arrayAdapter);
Toast.makeText(getBaseContext(), "Fin de la búsqueda", Toast.LENGTH_LONG).show();
break;
}
default:break;
}
}
};
registrarReciever();
}
private void registrarReciever() {
IntentFilter filtro = new IntentFilter();
filtro.addAction(BluetoothDevice.ACTION_FOUND);
filtro.addAction(BluetoothAdapter.ACTION_STATE_CHANGED);
filtro.addAction(BluetoothAdapter.ACTION_DISCOVERY_STARTED);
filtro.addAction(BluetoothAdapter.ACTION_DISCOVERY_FINISHED);
this.registerReceiver(bReceiver, filtro);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_bluetooth, menu);
return true;
}
@Override
public void onDestroy() {
this.unregisterReceiver(bReceiver);
super.onDestroy();
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
public void btnClick(View view){
if(bAdapter.isEnabled()){
bAdapter.disable();
}else{
Intent enableBtIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
startActivityForResult(enableBtIntent, REQUEST_ENABLE_BT);
}
}
public void btnBuscar(View view){
if(arrayDevices != null) {
arrayDevices.clear();
}
if(bAdapter.isDiscovering()) {
bAdapter.cancelDiscovery();
}
if(bAdapter.startDiscovery()) {
Toast.makeText(this, "Iniciando búsqueda de dispositivos bluetooth", Toast.LENGTH_SHORT).show();
}else {
Toast.makeText(this, "Error al iniciar búsqueda de dispositivos bluetooth", Toast.LENGTH_SHORT).show();
}
int cont=0;
while(bAdapter.isDiscovering()){
Toast.makeText(this, "Buscando -> "+(++cont), Toast.LENGTH_SHORT).show();
}
}
public class BluetoothDeviceArrayAdapter extends ArrayAdapter {
private List<BluetoothDevice> deviceList;
private Context context;
public BluetoothDeviceArrayAdapter(Context context, int textViewResourceId,
List<BluetoothDevice> objects) {
super(context, textViewResourceId, objects);
this.deviceList = objects;
this.context = context;
}
@Override
public int getCount(){
if(deviceList != null){
return deviceList.size();
}else{
return 0;
}
}
@Override
public Object getItem(int position){
if(deviceList!=null){
return deviceList.get(position);
}else{
return null;
}
}
@Override
public View getView(int position, View convertView, ViewGroup parent){
if((deviceList == null) || (context == null)) {
return null;
}
LayoutInflater inflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View elemento = inflater.inflate(android.R.layout.simple_list_item_2, parent, false);
TextView tvNombre = (TextView)elemento.findViewById(android.R.id.text1);
TextView tvDireccion = (TextView)elemento.findViewById(android.R.id.text2);
BluetoothDevice dispositivo = (BluetoothDevice)getItem(position);
if(dispositivo != null){
tvNombre.setText(dispositivo.getName());
tvDireccion.setText(dispositivo.getAddress());
}else{
//txtNombre.setText("ERROR");
tvNombre.setText("ERROR");
tvDireccion.setText("No disponible");
}
return elemento;
}
}
}
그리고 여기 레이아웃입니다 :
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:paddingBottom="@dimen/activity_vertical_margin"
android:orientation="vertical"
tools:context="com.example.alvar.graficos.Bluetooth">
<Button
android:id="@+id/btnBluetooth"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:onClick="btnClick"/>
<Button
android:id="@+id/btnBuscarDispositivo"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="btnBuscar"
android:layout_below="@+id/btnBluetooth"
android:layout_alignLeft="@+id/btnBluetooth"
android:layout_alignStart="@+id/btnBluetooth"
android:text="@string/buscarDispositivos"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceSmall"
android:text="Busqueda no iniciada"
android:id="@+id/estado"
android:layout_below="@+id/btnBuscarDispositivo"
android:layout_alignLeft="@+id/btnBuscarDispositivo"
android:layout_alignStart="@+id/btnBuscarDispositivo"
android:layout_centerHorizontal="true" />
<ListView
android:id="@+id/lvDispositivos"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="7"/>
</RelativeLayout>
인해 frejese 코멘트에, 난 당신에게 더 많은 정보를 제공하는 게시물을 수정할 이 응용 프로그램에서 두 개 더 가지고, 나는 찾아 blutooth 통해 다른 장치와 연결하려고합니다. 나는 블루투스를 켜고 끌 수있다. 하지만 내가 TextView를 변경해야한다고 가정하고 스캔을 시도하면
case BluetoothAdapter.ACTION_DISCOVERY_STARTED:{
((TextView) findViewById(R.id.estado)).setText("Buscando dispositivos");
break;
}
아무 것도하지 않습니다. 버튼을 클릭하면 토스트가 나타나고 오류가 표시되지 않지만 모든 장치를 찾습니다. 나는 througth 설정 -> 연결 -> 블루투스, 전화가 다른 장치를 찾는 것, 그래서 내가 블루투스가 깨진 옵션을 버려진 말할 필요가있다. 도와 줘서 고마워.
당신이 얻을 수있는 거리에 대한 정보를 추가해 주시겠습니까? – fejese