I'm working on a project using an Android device that has a Scan Engine connected. I've decompiled the testing app we use and grabbed the BroadcastReceiver code for it and copied it to my code.
There are some notable differences and I'm not sure why, here is the original BroadcastReceiver code:
private class BroadcastListener
extends BroadcastReceiver
{
private BroadcastListener() {}
public void onReceive(Context paramContext, Intent paramIntent)
{
if (paramIntent.getExtras() != null)
{
paramContext = paramIntent.getStringExtra(ScannerTestActivity.this.DATA_STRING_TAG);
paramIntent = paramIntent.getStringExtra(ScannerTestActivity.this.LABEL_TYPE_TAG);
ScannerTestActivity.this.mScanData.setText(paramContext);
ScannerTestActivity.this.mSymbology.setText(paramIntent);
if (paramContext.equals(ScannerTestActivity.this.TestScanCode))
{
paramContext = ScannerTestActivity.this;
paramContext.SuccessfulScans += 1;
ScannerTestActivity.this.mScanCount.setText("Scans: " + ScannerTestActivity.this.SuccessfulScans);
if (ScannerTestActivity.this.SuccessfulScans >= 5)
{
ScannerTestActivity.this.mPassButton.setVisibility(0);
ScannerTestActivity.this.mPassButton.setClickable(true);
}
}
}
}
But when I try this code in my application it doesn't allow me to set paramContext to the paramIntent.getStringExtra giving me the reason of Incompatible types which makes sense but how did the original code accomplish this. What is the importance of this context and should I be using it?
I've included my code below to reference against.
private class BroadcastListener extends BroadcastReceiver {
private BroadcastListener(){}
@Override
public void onReceive(Context context, Intent intent){
if(intent.getExtras() != null) {
TimePunch.this.mScanData = intent.getStringExtra(TimePunch.this.DATA_STRING_TAG);
// MakePunch();
}
}
}
The test BroadcastReceiver functions but BroadcastReceiver doesn't assign a value to mScanData. Should I be using the context of my onReceive function differently or what?
Any help would be greatly appreciated.
Here is my full Class:
package com.zebra.depot_ar05.ctt;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.util.Log;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.Menu;
import android.view.MenuItem;
import android.view.ViewGroup;
import android.widget.ProgressBar;
import android.widget.TextView;
import android.widget.Toast;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.sql.Time;
import java.text.DateFormat;
import java.util.Calendar;
import java.util.Date;
public class TimePunch extends AppCompatActivity {
protected ConnectionClass connectionClass;
protected String DATA_STRING_TAG="[Removed for Security]";
protected String LABEL_TYPE_TAG="[Removed for Security]";
protected String mScanData;
TextView dateLabel;
ProgressBar mProgBar;
IntentFilter filter;
protected Calendar c;
protected Date punchTime;
protected BroadcastListener mBroadcastListener;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_time_punch);
this.mBroadcastListener = new BroadcastListener();
this.filter = new IntentFilter();
this.filter.addAction("DECODE");
this.filter.addCategory("MAIN");
registerReceiver(this.mBroadcastListener, this.filter);
InitViews();
}
public void InitViews(){
dateLabel = (TextView) findViewById(R.id.date_display_label);
mProgBar = (ProgressBar) findViewById(R.id.progress_bar);
mProgBar.setVisibility(View.GONE);
setDate(dateLabel);
}
public void setDate(TextView v){
DateFormat[] formats = new DateFormat[]{
DateFormat.getDateInstance(),
};
for (DateFormat df : formats) {
v.setText(df.format(new Date()));
}
}
public void toastScan(View v){
Toast.makeText(this,this.mScanData,Toast.LENGTH_SHORT).show();
}
public void MakePunch(){
//DataWork worker = new DataWork();
//worker.execute(this.mScanData,this.punchTime.toString());
Toast.makeText(this, mScanData , Toast.LENGTH_SHORT).show();
}
@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_time_punch, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
@Override
public void onPause(){
super.onPause();
unregisterReceiver(this.mBroadcastListener);
}
@Override
public void onResume(){
super.onResume();
registerReceiver(this.mBroadcastListener,this.filter);
}
@Override
public void onStop(){
super.onStop();
}
private class BroadcastListener extends BroadcastReceiver {
private BroadcastListener(){}
@Override
public void onReceive(Context context, Intent intent){
if(intent.getExtras() != null) {
TimePunch.this.mScanData = intent.getStringExtra(TimePunch.this.DATA_STRING_TAG);
// MakePunch();
}
}
}
private class DataWork extends AsyncTask<String,String,String> {
String con_name,id_num,x,punch_time;
Boolean isSuccess = false;
@Override
protected String doInBackground(String... params){
//check for valid scan
id_num = params[0];
punch_time = params[1];
if(id_num.trim().equals("") || punch_time.trim().equals("")){
x = "Scan Rejected, Please Try Again";
}else{
try {
Connection con = connectionClass.CONN();
if (con == null) {
x = "Error Connecting To SQL Server";
} else {
// I need a way to tell between in and out punches I'm assuming this is will be later gleamed from the sql setup
// I'm sure I will need to modify queries, they should be paramitized also.
String name_query = "select 'EMP_NAME' from EMPLOYEE_TABLE where EMP_ID='" + id_num + "'";
String punch_time_query = "update 'EMP_TIME_PUNCH' with ('" + punch_time + ")' where key='" + id_num + "'";
Statement stmt = con.createStatement();
ResultSet rs = stmt.executeQuery(punch_time_query);
ResultSet rs2 = stmt.executeQuery(name_query);
con_name = rs2.toString();
if (rs2.next()) {
x = con_name;
isSuccess = true;
} else {
x = "No Employee With That ID Found";
isSuccess = false;
}
}
}catch (SQLException se) {
isSuccess = false;
Log.e("ERROR", se.getMessage());
}catch (Exception e){
isSuccess = false;
Log.e("ERROR", e.getMessage());
}
}
return x;
}
@Override
protected void onPreExecute(){
mProgBar.setVisibility(View.VISIBLE);
}
@Override
protected void onPostExecute(String r){
mProgBar.setVisibility(View.GONE);
Toast.makeText(TimePunch.this,r,Toast.LENGTH_SHORT).show();
if(isSuccess){
LayoutInflater inflater = getLayoutInflater();
View layout = inflater.inflate(R.layout.custom_toast, (ViewGroup) findViewById(R.id.custom_toast_layout));
TextView con_name_display = (TextView) layout.findViewById(R.id.con_name_display);
TextView time_punch_display = (TextView) layout.findViewById(R.id.punch_time_display);
con_name_display.setText(con_name);
time_punch_display.setText(punch_time);
Toast toast = new Toast(TimePunch.this);
toast.setGravity(Gravity.CENTER_HORIZONTAL, 0, 0);
toast.setDuration(Toast.LENGTH_SHORT);
toast.setView(layout);
toast.show();
}
}
}
}
EDIT:: As a result of my testing I've discovered that it doesn't matter which application I'm in on the device if I scan and an Inputfield has focus then it will input the scan into the field. e.g. I have file explorer open with the filepath input field having focus, if I scan a barcode the content of the barcode is input into the field.
