android 网络摄像头实现源码

package teaonly.projects.droidipcam;import teaonly.projects.droidipcam.R;import java.io.*;import android.app.Activity;import android.content.Context;import android.os.Bundle;import android.os.Handler;import android.os.Looper; import android.util.Log;import android.view.LayoutInflater;import android.view.Menu;import android.view.MenuItem;import android.view.SurfaceView;import android.view.View;import android.view.View.OnClickListener;import android.view.Window;import android.view.WindowManager;import android.widget.Button;import android.widget.TextView;import android.widget.RadioButton;import android.widget.RadioGroup;import android.widget.Toast;public class MainActivity extends Activity {private static final int MENU_EXIT = 0xCC882201; StreamingLoop cameraLoop; StreamingLoop httpLoop; NativeAgent nativeAgt; CameraView myCamView; StreamingServer strServer; TextView myMessage; Button btnStart; RadioGroup resRadios; boolean inServer = false; boolean inStreaming = false; int targetWid = 320; int targetHei = 240; final String checkingFile = "/sdcard/ipcam/myvideo.mp4"; final String resourceDirectory = "/sdcard/ipcam"; // memory object for encoder @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); requestWindowFeature(Window.FEATURE_NO_TITLE); Window win = getWindow();win.addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON); win.setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN); setContentView(R.layout.main); } @Overridepublic boolean onCreateOptionsMenu(Menu m){ m.add(0, MENU_EXIT, 0, "Exit"); return true; }@Override public boolean onOptionsItemSelected(MenuItem i){ switch(i.getItemId()){ case MENU_EXIT: finish(); System.exit(0); return true; default: return false;} } @Override public void onDestroy(){ super.onDestroy(); } @Override public void onStart(){ super.onStart(); setup(); } @Override public void onResume(){ super.onResume(); } @Override public void onPause(){ super.onPause(); finish(); System.exit(0); } private void clearResource() { String[] str ={"rm", "-r", resourceDirectory}; try { Process ps = Runtime.getRuntime().exec(str); try { ps.waitFor(); } catch (InterruptedException e) { e.printStackTrace(); } } catch (IOException e) { e.printStackTrace(); } } private void buildResource() { String[] str ={"mkdir", resourceDirectory}; try { Process ps = Runtime.getRuntime().exec(str); try { ps.waitFor(); } catch (InterruptedException e) { e.printStackTrace(); } copyResourceFile(R.raw.index, resourceDirectory "/index.html" ); copyResourceFile(R.raw.style, resourceDirectory "/style.css" ); copyResourceFile(R.raw.player, resourceDirectory "/player.js" ); copyResourceFile(R.raw.player_object, resourceDirectory "/player_object.swf" ); copyResourceFile(R.raw.player_controler, resourceDirectory "/player_controler.swf" ); } catch (IOException e) { e.printStackTrace(); } } private void setup() { clearResource(); buildResource(); NativeAgent.LoadLibraries(); nativeAgt = new NativeAgent(); cameraLoop = new StreamingLoop("teaonly.projects"); httpLoop = new StreamingLoop("teaonly.http"); myCamView = (CameraView)findViewById(R.id.surface_overlay); SurfaceView sv = (SurfaceView)findViewById(R.id.surface_camera); myCamView.SetupCamera(sv); myMessage = (TextView)findViewById(R.id.label_msg); btnStart = (Button)findViewById(R.id.btn_start); btnStart.setOnClickListener(startAction); btnStart.setEnabled(true);/* Button btnTest = (Button)findViewById(R.id.btn_test); btnTest.setOnClickListener(testAction); btnTest.setVisibility(View.INVISIBLE);*/ RadioButton rb = (RadioButton)findViewById(R.id.res_low); rb.setOnClickListener(low_res_listener); rb = (RadioButton)findViewById(R.id.res_medium); rb.setOnClickListener(medium_res_listener); rb = (RadioButton)findViewById(R.id.res_high); rb.setOnClickListener(high_res_listener); resRadios = (RadioGroup)findViewById(R.id.resolution); View v = (View)findViewById(R.id.layout_setup); v.setVisibility(View.VISIBLE); } private void startServer() { inServer = true; btnStart.setText( getString(R.string.action_stop) ); btnStart.setEnabled(true); NetInfoAdapter.Update(this); myMessage.setText( getString(R.string.msg_prepare_ok) " http://" NetInfoAdapter.getInfo("IP") ":8080" ); try { strServer = new StreamingServer(8080, resourceDirectory); strServer.setOnRequestListen(streamingRequest); } catch( IOException e ) { e.printStackTrace(); showToast(this, "Can't start http server.."); } } private void stopServer() { inServer = false; btnStart.setText( getString(R.string.action_start) ); btnStart.setEnabled(true); myMessage.setText( getString(R.string.msg_idle)); if ( strServer != null) { strServer.stop(); strServer = null; } } private boolean startStreaming() { if ( inStreaming == true) return false; cameraLoop.InitLoop(); httpLoop.InitLoop(); nativeAgt.NativeStartStreamingMedia(cameraLoop.getReceiverFileDescriptor() , httpLoop.getSenderFileDescriptor()); myCamView.PrepareMedia(targetWid, targetHei); boolean ret = myCamView.StartStreaming(cameraLoop.getSenderFileDescriptor()); if ( ret == false) { return false; } new Handler(Looper.getMainLooper()).post(new Runnable() { public void run() { showToast(MainActivity.this, getString(R.string.msg_streaming)); btnStart.setEnabled(false); } }); inStreaming = true; return true; } private void stopStreaming() { if ( inStreaming == false) return; inStreaming = false; myCamView.StopMedia(); httpLoop.ReleaseLoop(); cameraLoop.ReleaseLoop(); nativeAgt.NativeStopStreamingMedia(); new Handler(Looper.getMainLooper()).post(new Runnable() { public void run() { btnStart.setEnabled(true); } }); } private void doAction() { if ( inServer == false) { myCamView.PrepareMedia(targetWid, targetHei); boolean ret = myCamView.StartRecording(checkingFile); if ( ret ) { btnStart.setEnabled(false); resRadios.setEnabled(false); myMessage.setText( getString(R.string.msg_prepare_waiting)); new Handler().postDelayed(new Runnable() { public void run() { myCamView.StopMedia(); if ( NativeAgent.NativeCheckMedia(targetWid, targetHei, checkingFile) ) { startServer(); } else { btnStart.setEnabled(true); resRadios.setEnabled(false); showToast(MainActivity.this, getString(R.string.msg_prepare_error2)); } } }, 2000); // 2 seconds to release } else { showToast(this, getString(R.string.msg_prepare_error1)); } } else { stopServer(); } } private void copyResourceFile(int rid, String targetFile) throws IOException { InputStream fin = ((Context)this).getResources().openRawResource(rid); FileOutputStream fos = new FileOutputStream(targetFile); int length; byte[] buffer = new byte[1024*32]; while( (length = fin.read(buffer)) != -1){ fos.write(buffer,0,length); } fin.close(); fos.close(); } private void showToast(Context context, String message) { // create the view LayoutInflater vi = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); View view = vi.inflate(R.layout.message_toast, null); // set the text in the view TextView tv = (TextView)view.findViewById(R.id.message); tv.setText(message); // show the toast Toast toast = new Toast(context); toast.setView(view); toast.setDuration(Toast.LENGTH_SHORT); toast.show(); } StreamingServer.OnRequestListen streamingRequest = new StreamingServer.OnRequestListen() { public InputStream onRequest() { Log.d("TEAONLY", "Request live streaming..."); if ( startStreaming() == false) return null; try { InputStream ins = httpLoop.getInputStream(); return ins; } catch (IOException e) { e.printStackTrace(); Log.d("TEAONLY", "call httpLoop.getInputStream() error"); stopStreaming(); } Log.d("TEAONLY", "Return a null response to request"); return null; } public void requestDone() { Log.d("TEAONLY", "Request live streaming is Done!"); stopStreaming(); } }; private OnClickListener startAction = new OnClickListener() { public void onClick(View v) { doAction(); } }; private OnClickListener testAction = new OnClickListener() { public void onClick(View v) { // do some debug testing here. } }; private OnClickListener low_res_listener = new OnClickListener() { public void onClick(View v) { targetWid = 320; targetHei = 240; } }; private OnClickListener medium_res_listener = new OnClickListener() { public void onClick(View v) { targetWid = 640; targetHei = 480; } }; private OnClickListener high_res_listener = new OnClickListener() { public void onClick(View v) { targetWid = 1280; targetHei = 720; } };}