Hello all,
I would like to issue a request to the adbd from within my application
so i can retrieve the framebuffer contents. I've setup a small test
which connects to 127.0.0.1:5037 and sends the "framebuffer:" command.
The response i got was "Got reply 'FAIL', diag='closed'"
public class ScreenProjector extends Activity {
// Where to find the ADB bridge.
final static String ADB_HOST = "127.0.0.1"; //$NON-NLS-1$
final static int ADB_PORT = 5037;
static final String DEFAULT_ENCODING = "ISO-8859-1"; //$NON-NLS-1$
static InetAddress sHostAddr;
static InetSocketAddress sSocketAddr;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Thread.setDefaultUncaughtExceptionHandler(new
TopExceptionHandler(this));
SocketChannel adbChan = null;
try {
sHostAddr = InetAddress.getByName(ADB_HOST);
sSocketAddr = new InetSocketAddress(sHostAddr,
ADB_PORT);
adbChan = SocketChannel.open(sSocketAddr);
adbChan.configureBlocking(false);
byte[] request = formAdbRequest("framebuffer:"); //$NON-
NLS-1$
ByteBuffer buf = ByteBuffer.wrap(request, 0,
request.length);
adbChan.write(buf);
byte[] reply = new byte[4];
buf = ByteBuffer.wrap(reply, 0, reply.length);
adbChan.read(buf);
boolean readDiagString = true;
while (readDiagString) {
// length string is in next 4 bytes
byte[] lenBuf = new byte[4];
buf = ByteBuffer.wrap(lenBuf, 0, lenBuf.length);
adbChan.read(buf);
String lenStr = replyToString(lenBuf);
int len;
try {
len = Integer.parseInt(lenStr, 16);
} catch (NumberFormatException nfe) {
Log.w("ddms", "Expected digits, got '" + lenStr +
"': "
+ lenBuf[0] + " " + lenBuf[1] + " " +
lenBuf[2] + " "
+ lenBuf[3]);
Log.w("ddms", "reply was " +
replyToString(reply));
break;
}
byte[] msg = new byte[len];
buf = ByteBuffer.wrap(msg, 0, msg.length);
adbChan.read(buf);
String message = replyToString(msg);
Log.v("ddms", "Got reply '" + replyToString(reply) +
"', diag='"
+ message + "'");
break;
}
} catch (Exception e) {
Log.e("ScreenProjector", "", e);
}
setContentView(R.layout.main); // This displays the content on
the
}
/**
* Create an ASCII string preceeded by four hex digits. The
opening "####"
* is the length of the rest of the string, encoded as ASCII hex
(case
* doesn't matter). "port" and "host" are what we want to forward
to. If
* we're on the host side connecting into the device, "addrStr"
should be
* null.
*/
static byte[] formAdbRequest(String req) {
String resultStr = String.format("%04X%s", req.length(),
req); //$NON-NLS-1$
byte[] result;
try {
result = resultStr.getBytes(DEFAULT_ENCODING);
} catch (UnsupportedEncodingException uee) {
uee.printStackTrace(); // not expected
return null;
}
assert result.length == req.length() + 4;
return result;
}
/**
* Converts an ADB reply to a string.
*/
static String replyToString(byte[] reply) {
String result;
try {
result = new String(reply, DEFAULT_ENCODING);
} catch (UnsupportedEncodingException uee) {
uee.printStackTrace(); // not expected
result = "";
}
return result;
}
}
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