Hi , i am doing a project which my android enable mobile use to scan the bar-code using its in build camera. When i search on this topic i found that there is a great free and open source application call ZXing. This application allow users to access the Scan class using Intent. I am still studying about develop android application development.But after search on the internet i found the solution.Now i have created a simple application on how to do id. I created sample video of demonstration on my Huawei U8180 device.
You must install the ZXing to your device from android market.
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent" android:background="@drawable/bg">
<Button android:text="SCAN NOW"
android:id="@+id/btnSearch"
android:layout_width="150px"
android:gravity="center_vertical|center_horizontal"
android:layout_height="100dp"
android:layout_gravity="center_vertical|center_horizontal|center" android:textStyle="bold" android:textSize="25dp" android:layout_marginTop="150dp">
</Button>
</LinearLayout>
Now my main class like this.
package com.br;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
public class Main extends Activity {
/** Called when the activity is first created. */
Button myButton;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
myButton =(Button)findViewById(R.id.btnSearch);
myButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent("com.google.zxing.client.android.SCAN");
// intent.putExtra("com.google.zxing.client.android.SCAN.SCAN_MODE", "QR_CODE_MODE");
startActivityForResult(intent, 0);
}
});
}
public void onActivityResult(int requestCode, int resultCode, Intent intent) {
if (requestCode == 0) {
if (resultCode == RESULT_OK) {
//String result =intent.getAction();
String contents = intent.getStringExtra("SCAN_RESULT");
String format = intent.getStringExtra("SCAN_RESULT_FORMAT");
//Toast andEggs = Toast.makeText(Main.this, contents, Toast.LENGTH_SHORT);
//andEggs.show();
AlertDialog alertDialog = new AlertDialog.Builder(Main.this).create();
alertDialog.setTitle("Barcode Results");
alertDialog.setMessage(contents+"\n"+format);
alertDialog.setButton("OK", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
});
alertDialog.setIcon(R.drawable.barcode);
alertDialog.show();
// Handle successful scan
} else if (resultCode == RESULT_CANCELED) {
// Handle cancel
}
}
}
}
Now my AndroidManifest.xml file look like this.
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.br"
android:versionCode="1"
android:versionName="1.0">
<uses-sdk android:minSdkVersion="8" />
<uses-permission android:name="android.permission.CAMERA"></uses-permission>
<application android:icon="@drawable/barcode" android:label="@string/app_name">
<activity android:name=".Main"
android:label="@string/app_name"
android:configChanges="orientation|keyboardHidden"
android:theme="@android:style/Theme.NoTitleBar.Fullscreen"
android:windowSoftInputMode="stateAlwaysHidden">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
I think now you can understand how to use ZXing library in our project.This is the greatest library i ever saw in my life for mobile application development.
Sources
Damith's Blog 