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我有一個視頻字節數組格式，如何在android 2.2中使用surfaceViewer？我在嘗試視頻聊天。我使用onPreviewFrame和我有一個字節[]我會發送到服務器和服務器發送到其他客戶端和另一個客戶端將得到一個字節[]，我的問題是：我怎樣才能得出這個（字節[ ]）在客戶端？如何在android的surfaceviewer上繪製字節數組？
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回答
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這是給你的應用程序所有代碼，我的意思是這是你的videochat或本:)的一部分，我沒有嘗試我在Android 2.2的代碼，但它的工作原理爲Android 2.3.3，它是這樣工作的，您在editText設置一些設備的本地IP地址，那麼你就必須推動聊天視頻按鈕，使另一部分，其IP地址設置，會看到你的前置攝像頭
這裏的視頻是java代碼
import android.annotation.SuppressLint;
import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.ImageFormat;
import android.graphics.Rect;
import android.graphics.YuvImage;
import android.hardware.Camera;
import android.hardware.Camera.ErrorCallback;
import android.hardware.Camera.Size;
import android.os.Bundle;
import android.os.StrictMode;
import android.util.Log;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
public class MainActivity extends Activity implements OnClickListener {
private ImageView m_VideCaptureBitmap;
Camera mCamera;
Button m_StartVideoChat;
Button m_close_camera;
EditText IPAdresse;
private SurfaceView m_VideoCaptureView;
private static final int TIMEOUT_MS = 10000;
private static final int server_port = 13011;
byte[] m_buffer ;
@SuppressLint({ "NewApi", "NewApi", "NewApi" })
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);
m_VideoCaptureView = (SurfaceView) findViewById(R.id.imgSentView);
m_close_camera = (Button) findViewById(R.id.btnCameraClose);
m_close_camera.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
mCamera.release();
}
});
m_VideCaptureBitmap = (ImageView) findViewById(R.id.videoView);
IPAdresse = (EditText) findViewById(R.id.etIPAdresse);
IPAdresse.setText("192.168.2.32");
m_StartVideoChat = (Button) findViewById(R.id.btnStartVideo);
m_StartVideoChat.setOnClickListener(this);
new Thread(new Runnable() {
@Override
public void run() {
byte[] buffer = new byte [2048];
DatagramSocket s;
try {
s= new DatagramSocket(server_port);
s.setSoTimeout(TIMEOUT_MS);
while(true){
try {
final DatagramPacket p = new DatagramPacket(buffer, buffer.length);
s.receive(p);
m_buffer= buffer.clone();
runOnUiThread(new Runnable() {
@Override
public void run() {
frameToBuffer(p.getData());
}
});
}
catch(Exception e) {
e.printStackTrace();
}
}
} catch (SocketException e) {
// TODO Auto-generated catch block
e.printStackTrace();
//rstep.setText("fail socket create");
}
}
}).start();
}
public void onClick(View arg0) {
switch(arg0.getId()){
case R.id.btnStartVideo:
startVideo();
}
}
private Camera openFrontFacingCameraGingerbread(Camera cam)
{
int cameraCount = 0;
Camera.CameraInfo cameraInfo = new Camera.CameraInfo();
cameraCount = Camera.getNumberOfCameras();
for (int camIdx = 0; camIdx < cameraCount; camIdx++) {
Camera.getCameraInfo(camIdx, cameraInfo);
if (cameraInfo.facing == Camera.CameraInfo.CAMERA_FACING_FRONT ) {
try {
cam = Camera.open(camIdx);
} catch (RuntimeException e) {
e.printStackTrace();
}
}
}
return cam;
}
private void startVideo() {
if(mCamera != null) return;
SurfaceHolder videoCaptureViewHolder = null;
try {
//openFrontFacingCameraGingerbread(mCamera);
int camId = Camera.CameraInfo.CAMERA_FACING_BACK;
if (Camera.getNumberOfCameras() > 1 && camId < Camera.getNumberOfCameras() - 1) {
int i = 1 + camId ;
mCamera = Camera.open(i);
}
//mCamera = Camera.open();
} catch (RuntimeException e) {
Log.e("CameraTest", "Camera Open filed");
return;
}
mCamera.setErrorCallback(new ErrorCallback() {
public void onError(int error, Camera camera) {
}
});
Camera.Parameters parameters = mCamera.getParameters();
parameters.setPictureSize(10, 10);
parameters.setPreviewFrameRate(5);
List<Size> supportedPreviewSizes=parameters.getSupportedPreviewSizes();
Iterator<Size> supportedPreviewSizesIterator=supportedPreviewSizes.iterator();
while(supportedPreviewSizesIterator.hasNext()){
Size tmpSize=supportedPreviewSizesIterator.next();
Log.v("CameraTest","supportedPreviewSize.width = "+tmpSize.width+"supportedPreviewSize.height = "+tmpSize.height);
}
mCamera.setParameters(parameters);
if (null != m_VideoCaptureView)
videoCaptureViewHolder = m_VideoCaptureView.getHolder();
try {
mCamera.setPreviewDisplay(videoCaptureViewHolder);
} catch (Throwable t) {
}
Log.v("CameraTest","Camera PreviewFrameRate = "+mCamera.getParameters().getPreviewFrameRate());
Size previewSize=mCamera.getParameters().getPreviewSize();
int dataBufferSize=(int)(previewSize.height*previewSize.width*
(ImageFormat.getBitsPerPixel(mCamera.getParameters().getPreviewFormat())/8.0));
mCamera.addCallbackBuffer(new byte[dataBufferSize]);
mCamera.setPreviewCallbackWithBuffer(new Camera.PreviewCallback() {
private long timestamp=0;
public synchronized void onPreviewFrame(byte[] data, Camera camera) {
int size = data.length;
Size previewSize = camera.getParameters().getPreviewSize();
YuvImage yuvimage=new YuvImage(data, ImageFormat.NV21, previewSize.width, previewSize.height, null);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
//yuvimage.compressToJpeg(new Rect(0, 0, previewSize.width, previewSize.height), 80, baos);
yuvimage.compressToJpeg(new Rect(0, 0, 128, 96), 80, baos);
byte[] jdata = baos.toByteArray();
int sizeOfData = jdata.length;
DatagramSocket s;
try {
s = new DatagramSocket();
s.setBroadcast(true);
s.setSoTimeout(TIMEOUT_MS);
InetAddress local = InetAddress.getByName(IPAdresse.getText().toString());
DatagramPacket p = new DatagramPacket(jdata, jdata.length, local,server_port);
s.send(p);
} catch (SocketException e) {
e.printStackTrace();
} catch (UnknownHostException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
// Convert to Bitmap
//Bitmap bmp = BitmapFactory.decodeByteArray(jdata, 0, jdata.length);
//m_VideCaptureBitmap.setImageBitmap(bmp);
//bitmapArray.add(bmp);
// set our renderer to be the main renderer with
// the current activity context
//setContentView(glSurfaceView);
Log.v("CameraTest","Frame size = "+ data.length);
timestamp=System.currentTimeMillis();
try{
camera.addCallbackBuffer(data);
}catch (Exception e) {
Log.e("CameraTest", "addCallbackBuffer error");
return;
}
return;
}
});
try {
mCamera.startPreview();
} catch (Throwable e) {
mCamera.release();
mCamera = null;
return;
}
}
private void frameToBuffer(byte[] data) {
Bitmap bmp = BitmapFactory.decodeByteArray(data, 0, data.length);
m_VideCaptureBitmap.setImageBitmap(bmp);
}
}
這裏是xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<LinearLayout
android:layout_height="wrap_content"
android:layout_width="fill_parent"
android:orientation="vertical">
<EditText
android:id="@+id/etIPAdresse"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/etTEXT"
android:layout_alignParentTop="true"
android:ems="10"
android:hint="Ip adress" />
<Button
android:id="@+id/btnStartVideo"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/etTEXT"
android:layout_below="@+id/etTEXT"
android:text="start video chat" />
<Button
android:id="@+id/btnCameraClose"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Cancel camera" />
<ImageView
android:id="@+id/videoView"
android:layout_width="match_parent"
android:layout_height="180dp" />
<SurfaceView
android:id="@+id/imgSentView"
android:layout_width="match_parent"
android:layout_height="180dp" />
</LinearLayout>
</RelativeLayout>
試試吧;），別忘了給予好評:)，也別忘了在manifest.xml中
<uses-permission android:name="android.permission.CAMERA" />
<uses-feature android:name="android.hardware.camera" />
<uses-feature android:name="android.hardware.camera.autofocus" />
<uses-feature android:name="android.hardware.camera.front" android:required="false" />
<uses-permission android:name="android.permission.CHANGE_WIFI_MULTICAST_STATE"/>
<uses-permission android:name="android.permission.INTERNET"></uses-permission>
祺添加這些行
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