package com.example.arduino;
import java.io.IOException;
import java.io.OutputStream;
import android.app.Activity;
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.os.Bundle;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.SeekBar;
import android.widget.TextView;
public class MainActivity extends Activity {
private Button java;
private SeekBar servo;
byte srValue;
private static final int REQUEST_ENABLE_BT = 1;
ListView listDevicesFound;
Button btnScanDevice;
TextView stateBluetooth;
BluetoothAdapter bluetoothAdapter;
ArrayAdapter<String> btArrayAdapter;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btnScanDevice = (Button)findViewById(R.id.scandevice);
stateBluetooth = (TextView)findViewById(R.id.bluetoothstate);
bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
listDevicesFound = (ListView)findViewById(R.id.devicesfound);
btArrayAdapter = new ArrayAdapter<String>(MainActivity.this, android.R.layout.simple_list_item_1);
listDevicesFound.setAdapter(btArrayAdapter);
servo = (SeekBar)findViewById(R.id.servocontroller);
CheckBlueToothState();
btnScanDevice.setOnClickListener(btnScanDeviceOnClickListener);
registerReceiver(ActionFoundReceiver,
new IntentFilter(BluetoothDevice.ACTION_FOUND));
servo.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener(){
OutputStream Device;
public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
try{
srValue = (byte)progress;
}catch(Exception e)
{
e.printStackTrace();
}
}
public void onStopTrackingTouch(SeekBar seekBar) {
String temp = "r";
byte bytes[] = temp.getBytes();
try {
Device.write(bytes);
} catch (IOException e) {
e.printStackTrace();
}
try {
Device.write(srValue);
} catch (IOException e) {
e.printStackTrace();
}
}
@Override
public void onStartTrackingTouch(SeekBar arg0) {
// TODO Auto-generated method stub
}
});
}
@Override
protected void onDestroy() {
// TODO Auto-generated method stub
super.onDestroy();
unregisterReceiver(ActionFoundReceiver);
}
private void CheckBlueToothState(){
if (bluetoothAdapter == null){
stateBluetooth.setText("Bluetooth NOT support");
}else{
if (bluetoothAdapter.isEnabled()){
if(bluetoothAdapter.isDiscovering()){
stateBluetooth.setText("Bluetooth is currently in device discovery process.");
}else{
stateBluetooth.setText("Bluetooth is Enabled.");
btnScanDevice.setEnabled(true);
}
}else{
stateBluetooth.setText("Bluetooth is NOT Enabled!");
Intent enableBtIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
startActivityForResult(enableBtIntent, REQUEST_ENABLE_BT);
}
}
}
private Button.OnClickListener btnScanDeviceOnClickListener
= new Button.OnClickListener(){
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
btArrayAdapter.clear();
bluetoothAdapter.startDiscovery();
}};
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
// TODO Auto-generated method stub
if(requestCode == REQUEST_ENABLE_BT){
CheckBlueToothState();
}
}
private final BroadcastReceiver ActionFoundReceiver = new BroadcastReceiver(){
@Override
public void onReceive(Context context, Intent intent) {
// TODO Auto-generated method stub
String action = intent.getAction();
if(BluetoothDevice.ACTION_FOUND.equals(action)) {
BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
btArrayAdapter.add(device.getName() + "\n" + device.getAddress());
btArrayAdapter.notifyDataSetChanged();
}
}};
}
好吧这个代码在虚拟设备管理器中编译但是当我将它导入我的手机时它立即崩溃，我已经被困了好几个小时。怎么能在eclipse上编译而不是在手机上编译？我尝试过很多较低级别的Android操作系统，但每次都会强行关闭
07-23 21:53:40.204 6517 6517 E AndroidRuntime: FATAL EXCEPTION: main
07-23 21:53:40.204 6517 6517 E AndroidRuntime: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.arduino/com.example.arduino.MainActivity}: java.lang.SecurityException: Permission Denial: starting Intent { act=android.bluetooth.adapter.action.REQUEST_ENABLE cmp=com.android.settings/.bluetooth.RequestPermissionActivity } from ProcessRecord{41864c40 6517:com.example.arduino/u0a10153} (pid=6517, uid=10153) requires android.permission.BLUETOOTH
07-23 21:53:40.204 6517 6517 E AndroidRuntime: at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2306)
07-23 21:53:40.204 6517 6517 E AndroidRuntime: at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2356)
07-23 21:53:40.204 6517 6517 E AndroidRuntime: at android.app.ActivityThread.access$600(ActivityThread.java:150)
07-23 21:53:40.204 6517 6517 E AndroidRuntime: at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1244)
07-23 21:53:40.204 6517 6517 E AndroidRuntime: at android.os.Handler.dispatchMessage(Handler.java:99)
07-23 21:53:40.204 6517 6517 E AndroidRuntime: at android.os.Looper.loop(Looper.java:137)
07-23 21:53:40.204 6517 6517 E AndroidRuntime: at android.app.ActivityThread.main(ActivityThread.java:5195)
07-23 21:53:40.204 6517 6517 E AndroidRuntime: at java.lang.reflect.Method.invokeNative(Native Method)
07-23 21:53:40.204 6517 6517 E AndroidRuntime: at java.lang.reflect.Method.invoke(Method.java:511)
07-23 21:53:40.204 6517 6517 E AndroidRuntime: at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:795)
07-23 21:53:40.204 6517 6517 E AndroidRuntime: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:562)
07-23 21:53:40.204 6517 6517 E AndroidRuntime: at dalvik.system.NativeStart.main(Native Method)
07-23 21:53:40.204 6517 6517 E AndroidRuntime: Caused by: java.lang.SecurityException: Permission Denial: starting Intent { act=android.bluetooth.adapter.action.REQUEST_ENABLE cmp=com.android.settings/.bluetooth.RequestPermissionActivity } from ProcessRecord{41864c40 6517:com.example.arduino/u0a10153} (pid=6517, uid=10153) requires android.permission.BLUETOOTH
07-23 21:53:40.204 6517 6517 E AndroidRuntime: at android.os.Parcel.readException(Parcel.java:1425)
07-23 21:53:40.204 6517 6517 E AndroidRuntime: at android.os.Parcel.readException(Parcel.java:1379)
07-23 21:53:40.204 6517 6517 E AndroidRuntime: at android.app.ActivityManagerProxy.startActivity(ActivityManagerNative.java:1893)
07-23 21:53:40.204 6517 6517 E AndroidRuntime: at android.app.Instrumentation.execStartActivity(Instrumentation.java:1412)
07-23 21:53:40.204 6517 6517 E AndroidRuntime: at android.app.Activity.startActivityForResult(Activity.java:3370)
07-23 21:53:40.204 6517 6517 E AndroidRuntime: at android.app.Activity.startActivityForResult(Activity.java:3331)
07-23 21:53:40.204 6517 6517 E AndroidRuntime: at com.example.arduino.MainActivity.CheckBlueToothState(MainActivity.java:121)
07-23 21:53:40.204 6517 6517 E AndroidRuntime: at com.example.arduino.MainActivity.onCreate(MainActivity.java:52)
07-23 21:53:40.204 6517 6517 E AndroidRuntime: at android.app.Activity.performCreate(Activity.java:5104)
07-23 21:53:40.204 6517 6517 E AndroidRuntime: at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080)
07-23 21:53:40.204 6517 6517 E AndroidRuntime: at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2260)
07-23 21:53:40.204 6517 6517 E AndroidRuntime: ... 11 more
07-23 21:53:40.214 661 12263 W ActivityManager: Force finishing activity com.example.arduino/.MainActivity
07-23 21:53:40.324 661 12263 D dalvikvm: GC_FOR_ALLOC freed 1794K, 27% free 24899K/33868K, paused 77ms, total 78ms
07-23 21:53:40.824 661 676 W ActivityManager: Activity pause timeout for ActivityRecord{416c36f0 u0 com.example.arduino/.MainActivity}
07-23 21:53:40.965 661 661 I ActivityManager: No longer want com.android.musicfx (pid 6218): empty #17
07-23 21:53:41.505 6517 6517 I Process : Sending signal. PID: 6517 SIG: 9
07-23 21:53:41.505 661 1293 I ActivityManager: Process com.example.arduino (pid 6517) has died.
07-23 21:53:41.525 661 22882 W InputMethodManagerService: Window already focused, ignoring focus gain of: com.android.internal.view.IInputMethodClient$Stub$Proxy@41c3e618 attribute=null, token = android.os.BinderProxy@41c84818
07-23 21:53:42.086 873 12278 D dalvikvm: GC_FOR_ALLOC freed 6812K, 38% free 27836K/44836K, paused 60ms, total 60ms
07-23 21:53:42.146 873 12278 D dalvikvm: GC_FOR_ALLOC freed 38K, 36% free 29069K/44836K, paused 34ms, total 34ms
07-23 21:53:42.146 873 12278 I dalvikvm-heap: Grow heap (frag case) to 29.565MB for 1048592-byte allocation
07-23 21:53:42.206 873 885 D dalvikvm: GC_FOR_ALLOC freed 0K, 35% free 30093K/45864K, paused 53ms, total 53ms
07-23 21:53:42.236 873 12278 D dalvikvm: GC_FOR_ALLOC freed 1K, 35% free 30093K/45864K, paused 35ms, total 35ms
07-23 21:53:42.246 873 12278 I dalvikvm-heap: Grow heap (frag case) to 31.344MB for 1865972-byte allocation
07-23 21:53:42.286 873 885 D dalvikvm: GC_FOR_ALLOC freed <1K, 34% free 31914K/47688K, paused 38ms, total 38ms
答案 0 :(得分：1)
请记住在您的应用清单文件中声明蓝牙权限：
<manifest ... >
<uses-permission android:name="android.permission.BLUETOOTH" />
...
</manifest>
答案 1 :(得分：0)
java.lang.SecurityException：Permission Denial：启动Intent { ACT = android.bluetooth.adapter.action.REQUEST_ENABLE 来自的cmp = com.android.settings / .bluetooth.RequestPermissionActivity} ProcessRecord {41864c40 6517：com.example.arduino / u0a10153}（pid = 6517， uid = 10153）需要android.permission.BLUETOOTH
您是否添加了在清单中访问蓝牙的权限？