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  1. POSend files to WiFi printer
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    <p>I am developing an application in which from my mobile I am sending files to the WiFi printer by IP address and port number, which are .txt, .png, .jpg, .doc. They should be printed from the printer. I have tried following code but it is giving me output for .txt file only. What changes are required to get output of all type of files??? Please help...</p> <pre><code> import java.io.BufferedInputStream; import java.io.File; import java.io.FileInputStream; import java.io.IOException; import java.io.OutputStream; import java.net.Socket; import java.net.UnknownHostException; import android.app.Activity; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.EditText; import android.widget.TextView; public class MainActivity extends Activity { private Socket client; private FileInputStream fileInputStream; private BufferedInputStream bufferedInputStream; private OutputStream outputStream; private Button button; private TextView text; private EditText etIp, etPort; int port=0; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); button = (Button) findViewById(R.id.button1); //reference to the send button text = (TextView) findViewById(R.id.textView1); //reference to the text view etIp = (EditText) findViewById(R.id.editText1); etPort = (EditText) findViewById(R.id.editText2); //Button press event listener button.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { //create file instance port=Integer.parseInt(etPort.getText().toString()); File file = new File("/mnt/sdcard/bluetooth/AnyFile.txt"); try { client = new Socket(etIp.getText().toString(), port); byte[] mybytearray = new byte[(int) file.length()]; //create a byte array to file fileInputStream = new FileInputStream(file); bufferedInputStream = new BufferedInputStream(fileInputStream); bufferedInputStream.read(mybytearray, 0, mybytearray.length); //read the file outputStream = client.getOutputStream(); outputStream.write(mybytearray, 0, mybytearray.length); //write file to the output stream byte by byte outputStream.flush(); bufferedInputStream.close(); outputStream.close(); client.close(); text.setText("File Sent"); } catch (UnknownHostException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } } }); } } Manifest file &lt;uses-permission android:name="android.permission.INTERNET"/&gt; &lt;uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/&gt; &lt;uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/&gt; &lt;uses-permission android:name="android.permission.CHANGE_WIFI_STATE"/&gt; </code></pre>
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