When user login i will get user id and i will get device id and i will check in database(server end) and if the response is SUCCESS the ui need to update. But i am getting null pointer exception. I am updating ui in thread. Whats is the issues in this.
public class MainActivity extends AppCompatActivity {
final String LOG_TAG="TESTOPENAPP";
OpenAppLock mSelectedLock;
String email,devid;
ArrayList<OpenAppLock> scanList;
HttpPost httppost;
HttpResponse response;
HttpClient httpclient;
AlertDialogManager alert = new AlertDialogManager();
List<NameValuePair> nameValuePairs;
ProgressDialog dialog = null;
Button mScan,mConnect,mUnlock,mDisconnect;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Intent i = getIntent();
// Receiving the Data
// String name = i.getStringExtra("name");
email = i.getStringExtra("email");
System.out.println("user mail id" + email);
mScan=(Button)findViewById(R.id.scan);
mConnect=(Button)findViewById(R.id.connect);
mUnlock=(Button)findViewById(R.id.unlock);
mDisconnect=(Button)findViewById(R.id.disconnect);
OpenApp.initialize(this);
mScan.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
mScan.setText("Scanning ...");
OpenApp.scanForLocks(new ScanFinishedCallback() {
@Override
public void onScanFinished(ArrayList<OpenAppLock> scanList) {
Log.d(LOG_TAG, "OnScanFinishedCallback");
for (int i = 0; i < scanList.size(); i++) {
Log.d(LOG_TAG, "Available Lock " + i + " - " + scanList.get(i).getLockName());
devid = scanList.get(i).getLockName();
}
dialog = ProgressDialog.show(MainActivity.this, "",
"Validating user...", true);
new Thread(new Runnable() {
public void run() {
login();
}
}).start();
}
});
}
});
mConnect.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
mConnect.setText("Connecting ...");
mSelectedLock.connect(new ConnectionCallback() {
@Override
public void onFinishedTrying(boolean success) {
if(success){
mConnect.setVisibility(View.GONE);
mUnlock.setVisibility(View.VISIBLE);
//mDisconnect.setVisibility(View.VISIBLE);
}else{
mConnect.setText("Connect");
Toast.makeText(MainActivity.this, "Unable to connect to lock.", Toast.LENGTH_LONG).show();
}
}
});
}
});
mUnlock.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
//It should be already ensured that this mSelectedLock is something user is authorized to access
if(mSelectedLock.unlock("RANDOM")){
mUnlock.setVisibility(View.INVISIBLE);
mUnlock.postDelayed(new Runnable() {
public void run() {
mUnlock.setVisibility(View.VISIBLE);
mUnlock.performClick();
Toast.makeText(getApplicationContext(),"Button Clicked",Toast.LENGTH_SHORT).show();
}
}, 6000);
}else{
Toast.makeText(MainActivity.this, "Unable to unlock.", Toast.LENGTH_LONG).show();
}
}
});
}
void login() {
try {
httpclient = new DefaultHttpClient();
httppost = new HttpPost("http://192.168.25.107:8080/ActCFWeb/login"); // make sure the url is correct.
//add your data
nameValuePairs = new ArrayList<NameValuePair>(2);
// Always use the same variable name for posting i.e the android side variable name and php side variable name should be similar,
nameValuePairs.add(new BasicNameValuePair("email", email)); // $Edittext_value = $_POST['Edittext_value'];
nameValuePairs.add(new BasicNameValuePair("pass", devid));
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
//Execute HTTP Post Request
ResponseHandler<String> responseHandler = new BasicResponseHandler();
final String response = httpclient.execute(httppost, responseHandler);
System.out.println("Response : " + response);
runOnUiThread(new Runnable() {
public void run() {
dialog.dismiss();
System.out.println("Response : " + response);
}
});
if (response.contains("success")) {
runOnUiThread(new Runnable() {
public void run() {
if (scanList.size() > 0) {
Toast.makeText(MainActivity.this, "Scanning finished. Lock Found.", Toast.LENGTH_LONG).show();
mScan.setVisibility(View.GONE);
mConnect.setVisibility(View.VISIBLE);
mSelectedLock = scanList.get(0);
dialog.dismiss();
} else {
mScan.setText("Scan");
Toast.makeText(MainActivity.this, "No Lock Found while scanning. Please scan again.", Toast.LENGTH_LONG).show();
}
}
});
}
else {
showAlert();
}
} catch (Exception e) {
dialog.dismiss();
System.out.println("Exception : " + e.getMessage());
}
}
public void showAlert() {
MainActivity.this.runOnUiThread(new Runnable() {
public void run() {
AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
builder.setTitle("Login Error.");
builder.setMessage("User not Found.")
.setCancelable(false)
.setPositiveButton("OK", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
}
});
AlertDialog alert = builder.create();
alert.show();
}
});
}
@Override
protected void onStop() {
OpenApp.destroy();
if(mSelectedLock!=null)
mSelectedLock.destroy();
super.onStop();
}
