I have been trying to get the status of Bluetooth in android through this code: I instantiated BluetoothAdapter in onCreate() method...and called blue.isEnabled() like this
if(blue.isEnabled()){ .... } But I kept getting this error..and yes I have declared all the permissions for Bluetooth
Error Log
10-05 21:48:16.881: E/AndroidRuntime(538): FATAL EXCEPTION: main 10-05 21:48:16.881: E/AndroidRuntime(538): java.lang.NullPointerException 10-05 21:48:16.881: E/AndroidRuntime(538): at com.emazdoor.remind.me.main.onClick(main.java:58) 10-05 21:48:16.881: E/AndroidRuntime(538): at android.view.View.performClick(View.java:2485) 10-05 21:48:16.881: E/AndroidRuntime(538): at android.view.View$PerformClick.run(View.java:9080) 10-05 21:48:16.881: E/AndroidRuntime(538): at android.os.Handler.handleCallback(Handler.java:587) 10-05 21:48:16.881: E/AndroidRuntime(538): at android.os.Handler.dispatchMessage(Handler.java:92) 10-05 21:48:16.881: E/AndroidRuntime(538): at android.os.Looper.loop(Looper.java:123) 10-05 21:48:16.881: E/AndroidRuntime(538): at android.app.ActivityThread.main(ActivityThread.java:3683) 10-05 21:48:16.881: E/AndroidRuntime(538): at java.lang.reflect.Method.invokeNative(Native Method) 10-05 21:48:16.881: E/AndroidRuntime(538): at java.lang.reflect.Method.invoke(Method.java:507) 10-05 21:48:16.881: E/AndroidRuntime(538): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839) 10-05 21:48:16.881: E/AndroidRuntime(538): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597) 10-05 21:48:16.881: E/AndroidRuntime(538): at dalvik.system.NativeStart.main(Native Method) Please Help! Thanks
Complete Code
public class main extends Activity implements OnClickListener{ Button CallButton, SMSButton, BirthdayButton, BusinessButton; BluetoothAdapter b1; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.layout_main); b1 = BluetoothAdapter.getDefaultAdapter(); Initialiser(); } private void Initialiser() { CallButton = (Button) findViewById(R.id.CallButton); SMSButton = (Button) findViewById(R.id.SMSButton); BirthdayButton = (Button) findViewById(R.id.BirthdayButton); BusinessButton = (Button) findViewById(R.id.BusinessButton); CallButton.setOnClickListener(this); SMSButton.setOnClickListener(this); BirthdayButton.setOnClickListener(this); BusinessButton.setOnClickListener(this); } public void onClick(View arg0) { switch(arg0.getId()){ case R.id.CallButton: startActivity(new Intent(this, CallRemind.class)); break; case R.id.SMSButton: Toast.makeText(this, "SMS Button", Toast.LENGTH_LONG).show(); startActivity(new Intent(this, SMSReminder.class)); break; case R.id.BirthdayButton: Toast.makeText(this, "Birthday Button", Toast.LENGTH_LONG).show(); b1.enable(); break; case R.id.BusinessButton: Toast.makeText(this, "Business Button", Toast.LENGTH_LONG).show(); break; } } @Override public boolean onCreateOptionsMenu(Menu menu) { getMenuInflater().inflate(R.menu.layout_main, menu); return true; } } 
