Adding calculator

README.md

@@ -123,6 +123,9 @@ You can download the theme.zip here.
  - Better support for thumb assemblies
  - Support .NET assemblies
  - Add compatibility for OllyDbg's `.udd/.bak` files
+ - Add compatibility for IDA's produce files.
+ - About to add Hex view, calculator, and any other utilities.
+ - About to post this app on the play store!
 
 # Help wanted!
  - Don't the symbols' names look odd?

app/src/main/java/com/kyhsgeekcode/disassembler/HexManager.java

@@ -1,6 +1,42 @@
 package com.kyhsgeekcode.disassembler;
+import android.widget.*;
 
 public class HexManager
 {
+	private final static char[] hexArray = "0123456789ABCDEF".toCharArray();
 	byte [] bytes;
+	String sep=System.lineSeparator();
+	public void Show(TextView tv,int startaddress)
+	{
+		//show n bytes from startaddress
+		startaddress/=16;
+		startaddress*=16;
+		StringBuilder sb=new StringBuilder();
+		for(int i=startaddress;i<startaddress+12800;i++)
+		{
+			if(i>=bytes.length)
+			{
+				break;
+			}
+			int v = bytes[i] & 0xff;
+			sb.append(hexArray[v >>> 4]);
+			sb.append(hexArray[v & 0x0f]);
+			if(i%16==15)
+			{
+				sb.append(sep);
+				sb.append("   ");
+				//sb.append(i>>>4);
+			}else{
+				sb.append(" ");
+			}
+		}
+		tv.setText(sb.toString().trim());
+	}
+	public HexManager(){
+		bytes=new byte[1];
+	}
+	public void setBytes(byte[] b)
+	{
+		bytes=b;
+	}
 }

app/src/main/java/com/kyhsgeekcode/disassembler/MainActivity.java

@@ -61,12 +61,14 @@ public class MainActivity extends AppCompatActivity implements Button.OnClickLis
 
 	private Notification.Builder mBuilder;
 
-	private static final int TAB_EXPORT = 2;
+	private static final int TAB_EXPORT = 3;
 
-	private static final int TAB_DISASM = 3;
+	private static final int TAB_DISASM = 4;
 
 	private ColumnSetting columnSetting=new ColumnSetting();
 
+	HexManager hexManager=new HexManager();
+
 	public ColumnSetting getColumns()
 	{
 		return columnSetting;
@@ -2319,7 +2321,8 @@ private void AfterReadFully(File file) throws IOException
 	{
 		//	symAdapter.setCellItems(list);
 		getSupportActionBar().setTitle("Disassembler("+file.getName()+")");
-		tvHex.setText(getHexString());
+		hexManager.setBytes(filecontent);
+		hexManager.Show(tvHex,0);
 		try
 		{
 			setParsedFile(new ELFUtil(file,filecontent));