मैं एंड्रॉइड पर वीडियो रिकॉर्डिंग कैसे पकड़ सकता हूं?
जवाबों:
यहाँ MediaRecorder का उपयोग करके एक सरल वीडियो रिकॉर्डिंग उदाहरण दिया गया है:
public class VideoCapture extends Activity implements OnClickListener, SurfaceHolder.Callback {
MediaRecorder recorder;
SurfaceHolder holder;
boolean recording = false;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
recorder = new MediaRecorder();
initRecorder();
setContentView(R.layout.main);
SurfaceView cameraView = (SurfaceView) findViewById(R.id.CameraView);
holder = cameraView.getHolder();
holder.addCallback(this);
holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
cameraView.setClickable(true);
cameraView.setOnClickListener(this);
}
private void initRecorder() {
recorder.setAudioSource(MediaRecorder.AudioSource.DEFAULT);
recorder.setVideoSource(MediaRecorder.VideoSource.DEFAULT);
CamcorderProfile cpHigh = CamcorderProfile
.get(CamcorderProfile.QUALITY_HIGH);
recorder.setProfile(cpHigh);
recorder.setOutputFile("/sdcard/videocapture_example.mp4");
recorder.setMaxDuration(50000); // 50 seconds
recorder.setMaxFileSize(5000000); // Approximately 5 megabytes
}
private void prepareRecorder() {
recorder.setPreviewDisplay(holder.getSurface());
try {
recorder.prepare();
} catch (IllegalStateException e) {
e.printStackTrace();
finish();
} catch (IOException e) {
e.printStackTrace();
finish();
}
}
public void onClick(View v) {
if (recording) {
recorder.stop();
recording = false;
// Let's initRecorder so we can record again
initRecorder();
prepareRecorder();
} else {
recording = true;
recorder.start();
}
}
public void surfaceCreated(SurfaceHolder holder) {
prepareRecorder();
}
public void surfaceChanged(SurfaceHolder holder, int format, int width,
int height) {
}
public void surfaceDestroyed(SurfaceHolder holder) {
if (recording) {
recorder.stop();
recording = false;
}
recorder.release();
finish();
}
}
यह मेरी पुस्तक: प्रो एंड्रॉइड मीडिया: डेवलपिंग ग्राफिक्स, म्यूजिक, वीडियो और रिच मीडिया एप्स फॉर स्मार्टफोन एंड टैबलेट्स
इसके अलावा, इन अनुमतियों को प्रकट में शामिल करना न भूलें:
<uses-permission android:name="android.permission.RECORD_AUDIO" />
<uses-permission android:name="android.permission.CAMERA" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
यहाँ एक और उदाहरण है जो काम कर रहा है
public class EnregistrementVideoStackActivity extends Activity implements SurfaceHolder.Callback {
private SurfaceHolder surfaceHolder;
private SurfaceView surfaceView;
public MediaRecorder mrec = new MediaRecorder();
private Button startRecording = null;
File video;
private Camera mCamera;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.camera_surface);
Log.i(null , "Video starting");
startRecording = (Button)findViewById(R.id.buttonstart);
mCamera = Camera.open();
surfaceView = (SurfaceView) findViewById(R.id.surface_camera);
surfaceHolder = surfaceView.getHolder();
surfaceHolder.addCallback(this);
surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
}
@Override
public boolean onCreateOptionsMenu(Menu menu)
{
menu.add(0, 0, 0, "StartRecording");
menu.add(0, 1, 0, "StopRecording");
return super.onCreateOptionsMenu(menu);
}
@Override
public boolean onOptionsItemSelected(MenuItem item)
{
switch (item.getItemId())
{
case 0:
try {
startRecording();
} catch (Exception e) {
String message = e.getMessage();
Log.i(null, "Problem Start"+message);
mrec.release();
}
break;
case 1: //GoToAllNotes
mrec.stop();
mrec.release();
mrec = null;
break;
default:
break;
}
return super.onOptionsItemSelected(item);
}
protected void startRecording() throws IOException
{
mrec = new MediaRecorder(); // Works well
mCamera.unlock();
mrec.setCamera(mCamera);
mrec.setPreviewDisplay(surfaceHolder.getSurface());
mrec.setVideoSource(MediaRecorder.VideoSource.CAMERA);
mrec.setAudioSource(MediaRecorder.AudioSource.MIC);
mrec.setProfile(CamcorderProfile.get(CamcorderProfile.QUALITY_HIGH));
mrec.setPreviewDisplay(surfaceHolder.getSurface());
mrec.setOutputFile("/sdcard/zzzz.3gp");
mrec.prepare();
mrec.start();
}
protected void stopRecording() {
mrec.stop();
mrec.release();
mCamera.release();
}
private void releaseMediaRecorder(){
if (mrec != null) {
mrec.reset(); // clear recorder configuration
mrec.release(); // release the recorder object
mrec = null;
mCamera.lock(); // lock camera for later use
}
}
private void releaseCamera(){
if (mCamera != null){
mCamera.release(); // release the camera for other applications
mCamera = null;
}
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width,
int height) {
}
@Override
public void surfaceCreated(SurfaceHolder holder) {
if (mCamera != null){
Parameters params = mCamera.getParameters();
mCamera.setParameters(params);
}
else {
Toast.makeText(getApplicationContext(), "Camera not available!", Toast.LENGTH_LONG).show();
finish();
}
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
mCamera.stopPreview();
mCamera.release();
}
}
camera_surface.xml
<?xml version="1.0" encoding="UTF-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<SurfaceView
android:id="@+id/surface_camera"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1" />
<Button
android:id="@+id/buttonstart"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/record_start" />
</RelativeLayout>
और निश्चित रूप से प्रकट में इन अनुमति शामिल हैं:
<uses-permission android:name="android.permission.RECORD_AUDIO" />
<uses-permission android:name="android.permission.CAMERA" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
आप एक ही MediaRecorder क्लास का उपयोग करके ऑडियो और वीडियो रिकॉर्ड करते हैं। यह बहुत आसान है। यहाँ एक उदाहरण है ।
यह डेमो आपके लिए मददगार होगा…।
video.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<ToggleButton
android:id="@+id/toggleRecordingButton"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentTop="true" />
<SurfaceView
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/surface_camera"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_centerInParent="true"
android:layout_weight="1" >
</SurfaceView>
आपकी मुख्य गतिविधि: Video.java
public class Video extends Activity implements OnClickListener,
SurfaceHolder.Callback {
private static final String TAG = "CAMERA_TUTORIAL";
private SurfaceView mSurfaceView;
private SurfaceHolder mHolder;
private Camera mCamera;
private boolean previewRunning;
private MediaRecorder mMediaRecorder;
private final int maxDurationInMs = 20000;
private final long maxFileSizeInBytes = 500000;
private final int videoFramesPerSecond = 20;
Button btn_record;
boolean mInitSuccesful = false;
File file;
ToggleButton mToggleButton;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.video);
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
mSurfaceView = (SurfaceView) findViewById(R.id.surface_camera);
mHolder = mSurfaceView.getHolder();
mHolder.addCallback(this);
mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
mToggleButton = (ToggleButton) findViewById(R.id.toggleRecordingButton);
mToggleButton.setOnClickListener(new OnClickListener() {
@Override
// toggle video recording
public void onClick(View v) {
if (((ToggleButton) v).isChecked())
mMediaRecorder.start();
else {
mMediaRecorder.stop();
mMediaRecorder.reset();
try {
initRecorder(mHolder.getSurface());
} catch (IOException e) {
e.printStackTrace();
}
}
}
});
}
private void initRecorder(Surface surface) throws IOException {
// It is very important to unlock the camera before doing setCamera
// or it will results in a black preview
if (mCamera == null)
{
mCamera = Camera.open();
mCamera.unlock();
}
if (mMediaRecorder == null)
mMediaRecorder = new MediaRecorder();
mMediaRecorder.setPreviewDisplay(surface);
mMediaRecorder.setCamera(mCamera);
mMediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);
mMediaRecorder.setAudioSource(MediaRecorder.AudioSource.DEFAULT);
mMediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.DEFAULT);
mMediaRecorder.setOutputFile(this.initFile().getAbsolutePath());
// No limit. Don't forget to check the space on disk.
mMediaRecorder.setMaxDuration(50000);
mMediaRecorder.setVideoFrameRate(24);
mMediaRecorder.setVideoSize(1280, 720);
mMediaRecorder.setVideoEncodingBitRate(3000000);
mMediaRecorder.setAudioEncodingBitRate(8000);
mMediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.DEFAULT);
mMediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
try {
mMediaRecorder.prepare();
} catch (IllegalStateException e) {
// This is thrown if the previous calls are not called with the
// proper order
e.printStackTrace();
}
mInitSuccesful = true;
}
private File initFile() {
// File dir = new
// File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_MOVIES),
// this
File dir = new File(Environment.getExternalStorageDirectory(), this
.getClass().getPackage().getName());
if (!dir.exists() && !dir.mkdirs()) {
Log.wtf(TAG,
"Failed to create storage directory: "
+ dir.getAbsolutePath());
Toast.makeText(Video.this, "not record", Toast.LENGTH_SHORT);
file = null;
} else {
file = new File(dir.getAbsolutePath(), new SimpleDateFormat(
"'IMG_'yyyyMMddHHmmss'.mp4'").format(new Date()));
}
return file;
}
@Override
public void surfaceCreated(SurfaceHolder holder) {
try {
if (!mInitSuccesful)
initRecorder(mHolder.getSurface());
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
private void shutdown() {
// Release MediaRecorder and especially the Camera as it's a shared
// object that can be used by other applications
mMediaRecorder.reset();
mMediaRecorder.release();
mCamera.release();
// once the objects have been released they can't be reused
mMediaRecorder = null;
mCamera = null;
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
shutdown();
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width,
int height) {
// TODO Auto-generated method stub
}
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
}
}
MediaMetadataRetriever वर्ग
public class MediaMetadataRetriever {
static {
System.loadLibrary("media_jni");
native_init();
}
// The field below is accessed by native methods
@SuppressWarnings("unused")
private int mNativeContext;
public MediaMetadataRetriever() {
native_setup();
}
/**
* Call this method before setDataSource() so that the mode becomes
* effective for subsequent operations. This method can be called only once
* at the beginning if the intended mode of operation for a
* MediaMetadataRetriever object remains the same for its whole lifetime,
* and thus it is unnecessary to call this method each time setDataSource()
* is called. If this is not never called (which is allowed), by default the
* intended mode of operation is to both capture frame and retrieve meta
* data (i.e., MODE_GET_METADATA_ONLY | MODE_CAPTURE_FRAME_ONLY).
* Often, this may not be what one wants, since doing this has negative
* performance impact on execution time of a call to setDataSource(), since
* both types of operations may be time consuming.
*
* @param mode The intended mode of operation. Can be any combination of
* MODE_GET_METADATA_ONLY and MODE_CAPTURE_FRAME_ONLY:
* 1. MODE_GET_METADATA_ONLY & MODE_CAPTURE_FRAME_ONLY:
* For neither frame capture nor meta data retrieval
* 2. MODE_GET_METADATA_ONLY: For meta data retrieval only
* 3. MODE_CAPTURE_FRAME_ONLY: For frame capture only
* 4. MODE_GET_METADATA_ONLY | MODE_CAPTURE_FRAME_ONLY:
* For both frame capture and meta data retrieval
*/
public native void setMode(int mode);
/**
* @return the current mode of operation. A negative return value indicates
* some runtime error has occurred.
*/
public native int getMode();
/**
* Sets the data source (file pathname) to use. Call this
* method before the rest of the methods in this class. This method may be
* time-consuming.
*
* @param path The path of the input media file.
* @throws IllegalArgumentException If the path is invalid.
*/
public native void setDataSource(String path) throws IllegalArgumentException;
/**
* Sets the data source (FileDescriptor) to use. It is the caller's
* responsibility to close the file descriptor. It is safe to do so as soon
* as this call returns. Call this method before the rest of the methods in
* this class. This method may be time-consuming.
*
* @param fd the FileDescriptor for the file you want to play
* @param offset the offset into the file where the data to be played starts,
* in bytes. It must be non-negative
* @param length the length in bytes of the data to be played. It must be
* non-negative.
* @throws IllegalArgumentException if the arguments are invalid
*/
public native void setDataSource(FileDescriptor fd, long offset, long length)
throws IllegalArgumentException;
/**
* Sets the data source (FileDescriptor) to use. It is the caller's
* responsibility to close the file descriptor. It is safe to do so as soon
* as this call returns. Call this method before the rest of the methods in
* this class. This method may be time-consuming.
*
* @param fd the FileDescriptor for the file you want to play
* @throws IllegalArgumentException if the FileDescriptor is invalid
*/
public void setDataSource(FileDescriptor fd)
throws IllegalArgumentException {
// intentionally less than LONG_MAX
setDataSource(fd, 0, 0x7ffffffffffffffL);
}
/**
* Sets the data source as a content Uri. Call this method before
* the rest of the methods in this class. This method may be time-consuming.
*
* @param context the Context to use when resolving the Uri
* @param uri the Content URI of the data you want to play
* @throws IllegalArgumentException if the Uri is invalid
* @throws SecurityException if the Uri cannot be used due to lack of
* permission.
*/
public void setDataSource(Context context, Uri uri)
throws IllegalArgumentException, SecurityException {
if (uri == null) {
throw new IllegalArgumentException();
}
String scheme = uri.getScheme();
if(scheme == null || scheme.equals("file")) {
setDataSource(uri.getPath());
return;
}
AssetFileDescriptor fd = null;
try {
ContentResolver resolver = context.getContentResolver();
try {
fd = resolver.openAssetFileDescriptor(uri, "r");
} catch(FileNotFoundException e) {
throw new IllegalArgumentException();
}
if (fd == null) {
throw new IllegalArgumentException();
}
FileDescriptor descriptor = fd.getFileDescriptor();
if (!descriptor.valid()) {
throw new IllegalArgumentException();
}
// Note: using getDeclaredLength so that our behavior is the same
// as previous versions when the content provider is returning
// a full file.
if (fd.getDeclaredLength() < 0) {
setDataSource(descriptor);
} else {
setDataSource(descriptor, fd.getStartOffset(), fd.getDeclaredLength());
}
return;
} catch (SecurityException ex) {
} finally {
try {
if (fd != null) {
fd.close();
}
} catch(IOException ioEx) {
}
}
setDataSource(uri.toString());
}
/**
* Call this method after setDataSource(). This method retrieves the
* meta data value associated with the keyCode.
*
* The keyCode currently supported is listed below as METADATA_XXX
* constants. With any other value, it returns a null pointer.
*
* @param keyCode One of the constants listed below at the end of the class.
* @return The meta data value associate with the given keyCode on success;
* null on failure.
*/
public native String extractMetadata(int keyCode);
/**
* Call this method after setDataSource(). This method finds a
* representative frame if successful and returns it as a bitmap. This is
* useful for generating a thumbnail for an input media source.
*
* @return A Bitmap containing a representative video frame, which
* can be null, if such a frame cannot be retrieved.
*/
public native Bitmap captureFrame();
/**
* Call this method after setDataSource(). This method finds the optional
* graphic or album art associated (embedded or external url linked) the
* related data source.
*
* @return null if no such graphic is found.
*/
public native byte[] extractAlbumArt();
/**
* Call it when one is done with the object. This method releases the memory
* allocated internally.
*/
public native void release();
private native void native_setup();
private static native void native_init();
private native final void native_finalize();
@Override
protected void finalize() throws Throwable {
try {
native_finalize();
} finally {
super.finalize();
}
}
public static final int MODE_GET_METADATA_ONLY = 0x01;
public static final int MODE_CAPTURE_FRAME_ONLY = 0x02;
/*
* Do not change these values without updating their counterparts
* in include/media/mediametadataretriever.h!
*/
public static final int METADATA_KEY_CD_TRACK_NUMBER = 0;
public static final int METADATA_KEY_ALBUM = 1;
public static final int METADATA_KEY_ARTIST = 2;
public static final int METADATA_KEY_AUTHOR = 3;
public static final int METADATA_KEY_COMPOSER = 4;
public static final int METADATA_KEY_DATE = 5;
public static final int METADATA_KEY_GENRE = 6;
public static final int METADATA_KEY_TITLE = 7;
public static final int METADATA_KEY_YEAR = 8;
public static final int METADATA_KEY_DURATION = 9;
public static final int METADATA_KEY_NUM_TRACKS = 10;
public static final int METADATA_KEY_IS_DRM_CRIPPLED = 11;
public static final int METADATA_KEY_CODEC = 12;
public static final int METADATA_KEY_RATING = 13;
public static final int METADATA_KEY_COMMENT = 14;
public static final int METADATA_KEY_COPYRIGHT = 15;
public static final int METADATA_KEY_BIT_RATE = 16;
public static final int METADATA_KEY_FRAME_RATE = 17;
public static final int METADATA_KEY_VIDEO_FORMAT = 18;
public static final int METADATA_KEY_VIDEO_HEIGHT = 19;
public static final int METADATA_KEY_VIDEO_WIDTH = 20;
public static final int METADATA_KEY_WRITER = 21;
// Add more here...
}
mHolder.addCallback(this);सतह की घटनाओं को संभालने के लिए गतिविधि वर्ग को संलग्न करती है। हो सकता है कि आपका IDE इस कॉल को पहचान न सके, लेकिन इसे कॉल किया जाना चाहिए।
यह नमूना कैमरा पूर्वावलोकन कोड देखें CameraPreview। यह आपको वीडियो पूर्वावलोकन के लिए वीडियो रिकॉर्डिंग कोड बनाने MediaRecorder, ऑब्जेक्ट बनाने और वीडियो रिकॉर्डिंग पैरामीटर सेट करने में मदद करेगा ।
खोजकर्ताओं के लाभ के लिए, यह उदाहरण आपको एक सक्रिय पूर्वावलोकन देगा, जिसमें रिकॉर्डिंग के लिए एक स्टार्ट / स्टॉप बटन होगा। यह इस Android ब्लॉग से संशोधित किया गया था और काफी विश्वसनीय लगता है।
जावा वर्ग (वीडियोविथर्सफेस वीवी)
package <<your packagename here>>;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;
import android.app.Activity;
import android.content.Context;
import android.hardware.Camera;
import android.media.CamcorderProfile;
import android.media.MediaRecorder;
import android.os.Bundle;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.widget.Button;
import android.widget.FrameLayout;
import android.widget.Toast;
public class VideoWithSurfaceVw extends Activity{
// Adapted from http://sandyandroidtutorials.blogspot.co.uk/2013/05/android-video-capture-tutorial.html
private Camera myCamera;
private MyCameraSurfaceView myCameraSurfaceView;
private MediaRecorder mediaRecorder;
Button myButton;
SurfaceHolder surfaceHolder;
boolean recording;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
recording = false;
setContentView(R.layout.activity_video_with_surface_vw);
//Get Camera for preview
myCamera = getCameraInstance();
if(myCamera == null){
Toast.makeText(VideoWithSurfaceVw.this,
"Fail to get Camera",
Toast.LENGTH_LONG).show();
}
myCameraSurfaceView = new MyCameraSurfaceView(this, myCamera);
FrameLayout myCameraPreview = (FrameLayout)findViewById(R.id.videoview);
myCameraPreview.addView(myCameraSurfaceView);
myButton = (Button)findViewById(R.id.mybutton);
myButton.setOnClickListener(myButtonOnClickListener);
}
Button.OnClickListener myButtonOnClickListener
= new Button.OnClickListener(){
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
try{
if(recording){
// stop recording and release camera
mediaRecorder.stop(); // stop the recording
releaseMediaRecorder(); // release the MediaRecorder object
//Exit after saved
//finish();
myButton.setText("REC");
recording = false;
}else{
//Release Camera before MediaRecorder start
releaseCamera();
if(!prepareMediaRecorder()){
Toast.makeText(VideoWithSurfaceVw.this,
"Fail in prepareMediaRecorder()!\n - Ended -",
Toast.LENGTH_LONG).show();
finish();
}
mediaRecorder.start();
recording = true;
myButton.setText("STOP");
}
}catch (Exception ex){
ex.printStackTrace();
}
}};
private Camera getCameraInstance(){
// TODO Auto-generated method stub
Camera c = null;
try {
c = Camera.open(); // attempt to get a Camera instance
}
catch (Exception e){
// Camera is not available (in use or does not exist)
}
return c; // returns null if camera is unavailable
}
private String getFileName_CustomFormat() {
SimpleDateFormat sdfDate = new SimpleDateFormat("yyyy-MM-dd HH_mm_ss");
Date now = new Date();
String strDate = sdfDate.format(now);
return strDate;
}
private boolean prepareMediaRecorder(){
myCamera = getCameraInstance();
mediaRecorder = new MediaRecorder();
myCamera.unlock();
mediaRecorder.setCamera(myCamera);
mediaRecorder.setAudioSource(MediaRecorder.AudioSource.CAMCORDER);
mediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);
mediaRecorder.setProfile(CamcorderProfile.get(CamcorderProfile.QUALITY_HIGH));
mediaRecorder.setOutputFile("/sdcard/" + getFileName_CustomFormat() + ".mp4");
//mediaRecorder.setOutputFile("/sdcard/myvideo1.mp4");
mediaRecorder.setMaxDuration(60000); // Set max duration 60 sec.
mediaRecorder.setMaxFileSize(50000000); // Set max file size 50M
mediaRecorder.setPreviewDisplay(myCameraSurfaceView.getHolder().getSurface());
try {
mediaRecorder.prepare();
} catch (IllegalStateException e) {
releaseMediaRecorder();
return false;
} catch (IOException e) {
releaseMediaRecorder();
return false;
}
return true;
}
@Override
protected void onPause() {
super.onPause();
releaseMediaRecorder(); // if you are using MediaRecorder, release it first
releaseCamera(); // release the camera immediately on pause event
}
private void releaseMediaRecorder(){
if (mediaRecorder != null) {
mediaRecorder.reset(); // clear recorder configuration
mediaRecorder.release(); // release the recorder object
mediaRecorder = new MediaRecorder();
myCamera.lock(); // lock camera for later use
}
}
private void releaseCamera(){
if (myCamera != null){
myCamera.release(); // release the camera for other applications
myCamera = null;
}
}
public class MyCameraSurfaceView extends SurfaceView implements SurfaceHolder.Callback{
private SurfaceHolder mHolder;
private Camera mCamera;
public MyCameraSurfaceView(Context context, Camera camera) {
super(context);
mCamera = camera;
// Install a SurfaceHolder.Callback so we get notified when the
// underlying surface is created and destroyed.
mHolder = getHolder();
mHolder.addCallback(this);
// deprecated setting, but required on Android versions prior to 3.0
mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int weight,
int height) {
// If your preview can change or rotate, take care of those events here.
// Make sure to stop the preview before resizing or reformatting it.
if (mHolder.getSurface() == null){
// preview surface does not exist
return;
}
// stop preview before making changes
try {
mCamera.stopPreview();
} catch (Exception e){
// ignore: tried to stop a non-existent preview
}
// make any resize, rotate or reformatting changes here
// start preview with new settings
try {
mCamera.setPreviewDisplay(mHolder);
mCamera.startPreview();
} catch (Exception e){
}
}
@Override
public void surfaceCreated(SurfaceHolder holder) {
// TODO Auto-generated method stub
// The Surface has been created, now tell the camera where to draw the preview.
try {
mCamera.setPreviewDisplay(holder);
mCamera.startPreview();
} catch (IOException e) {
}
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
// TODO Auto-generated method stub
}
}
}गतिविधि (गतिविधि_विडियो_विथ_सुरक्षा_व्व)
<RelativeLayout android:id="@+id/surface_camera"
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_centerInParent="true"
android:layout_weight="1"
>
<RelativeLayout
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<FrameLayout
android:id="@+id/videoview"
android:layout_width="fill_parent"
android:layout_height="fill_parent"/>
<Button
android:id="@+id/mybutton"
android:layout_width="100dp"
android:layout_height="50dp"
android:layout_centerHorizontal="true"
android:layout_alignParentBottom="true"
android:text="REC"
android:textSize="12dp"/>
</RelativeLayout>
</RelativeLayout>एक साइड नोट के रूप में - एंड्रॉइड एपीआई या दोषपूर्ण प्रलेखन में एक बग प्रतीत होता है या शायद मैं सिर्फ सादा बेवकूफ हूं। Google डॉक्स स्पष्ट रूप से निम्नलिखित बताता है:
नोट: Android 4.0 (एपीआई स्तर 14) के साथ शुरू, Camera.lock () और Camera.unlock () कॉल स्वचालित रूप से आपके लिए प्रबंधित की जाती हैं।
देखें: http://developer.android.com/guide/topics/media/camera.html
प्रतीत नहीं होता यही मामला होगा!
बिना किसी सफलता के साक्षर दिनों के लिए जूझने और कई छोटी समस्याओं जैसे "शुरू करने में असफल" होने के बाद, मैंने मैन्युअल रूप से लॉकिंग और बीएएम को लागू करने का निर्णय लिया! सब कुछ ठीक रहा।
14 की न्यूनतम एसडीके के साथ 4.1.1 डिवाइस के लिए जीनोमिशन एमुलेटर का उपयोग कर इम।
यदि आप रियर कैमरा का उपयोग कर रहे हैं तो उपरोक्त उदाहरण काम करेगा। यदि आप फ्रंट कैमरा का उपयोग कर रहे हैं, तो आपको कुछ चीजों को समायोजित करना होगा:
सबसे पहले, आपको प्रकट में नई अनुमति जोड़ने की आवश्यकता होगी।
<uses-feature android:name="android.hardware.camera.front" android:required="false" />
इसके initRecorderबजाय, आपकी विधि में
CamcorderProfile cpHigh = CamcorderProfile
.get(CamcorderProfile.QUALITY_HIGH);
recorder.setProfile(cpHigh);आपको उपयोग करने की आवश्यकता है:
CamcorderProfile profile = CamcorderProfile.get(Camera.CameraInfo.CAMERA_FACING_FRONT, CamcorderProfile.QUALITY_LOW);
recorder.setProfile(profile);क्योंकि CamcorderProfile.QUALITY_HIGHरियर कैमरा के लिए आरक्षित है।
मीडियारेकॉर्डर के लिए आपको वीडियो आकार भी सेट करना होगा क्योंकि यह आपके सतह दृश्य में है।
यहाँ एक छोटे पूर्वावलोकन प्रदर्शन के साथ फ्रंट कैमरा से वीडियो रिकॉर्ड करने का पूरा उदाहरण है:
Android.manifest
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.RECORD_AUDIO" />
<uses-permission android:name="android.permission.CAMERA" />
<uses-feature android:name="android.hardware.camera" android:required="false" />
<uses-feature android:name="android.hardware.camera.front" android:required="false" />activity_camera.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="CameraActivity">
<SurfaceView
android:layout_width="200dp"
android:layout_height="wrap_content"
android:id="@+id/surfaceView"/>
<Button
android:layout_width="100dp"
android:layout_height="100dp"
android:text="REC"
android:id="@+id/btnRecord"
android:layout_alignParentBottom="true"
android:layout_marginBottom="25dp" />
</RelativeLayout>CameraActivity.java
public class SongVideoActivity extends BaseActivity implements SurfaceHolder.Callback {
private int mCameraContainerWidth = 0;
private SurfaceView mSurfaceView = null;
private SurfaceHolder mSurfaceHolder = null;
private Camera mCamera = null;
private boolean mIsRecording = false;
private int mPreviewHeight;
private int mPreviewWidth;
MediaRecorder mRecorder;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_song_video);
Thread.setDefaultUncaughtExceptionHandler(new Thread.UncaughtExceptionHandler() {
@Override
public void uncaughtException(Thread thread, Throwable ex) {
releaseMediaRecorder();
releaseCamera();
}
});
mCamera = getCamera();
//camera preview
mSurfaceView = (SurfaceView) findViewById(R.id.surfaceView);
mSurfaceHolder = mSurfaceView.getHolder();
mSurfaceHolder.addCallback(this);
// deprecated setting, but required on Android versions prior to 3.0
mSurfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
mCameraContainerWidth = mSurfaceView.getLayoutParams().width;
findViewById(R.id.btnRecord).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (mIsRecording) {
stopRecording();
} else {
// initialize video camera
if (prepareVideoRecorder()) {
// Camera is available and unlocked, MediaRecorder is prepared,
// now you can start recording
mRecorder.start();
// inform the user that recording has started
Toast.makeText(getApplicationContext(), "Started recording", Toast.LENGTH_SHORT).show();
mIsRecording = true;
} else {
// prepare didn't work, release the camera
releaseMediaRecorder();
// inform user
}
}
}
});
}
private void stopRecording() {
mRecorder.stop(); // stop the recording
releaseMediaRecorder(); // release the MediaRecorder object
mCamera.lock(); // take camera access back from MediaRecorder
// inform the user that recording has stopped
Toast.makeText(this, "Recording complete", Toast.LENGTH_SHORT).show();
mIsRecording = false;
}
@Override
protected void onDestroy() {
super.onDestroy();
releaseMediaRecorder(); // if you are using MediaRecorder, release it first
releaseCamera(); // release the camera immediately on pause event
}
private Camera getCamera() {
Camera.CameraInfo cameraInfo = new Camera.CameraInfo();
for (int camIdx = 0; camIdx < Camera.getNumberOfCameras(); camIdx++) {
Camera.getCameraInfo(camIdx, cameraInfo);
if (cameraInfo.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) {
try {
return mCamera = Camera.open(camIdx);
} catch (RuntimeException e) {
Log.e("cameras", "Camera failed to open: " + e.getLocalizedMessage());
}
}
}
return null;
}
@Override
protected void onPause() {
super.onPause();
releaseMediaRecorder(); // if you are using MediaRecorder, release it first
releaseCamera(); // release the camera immediately on pause event
}
private Camera.Size getBestPreviewSize(Camera.Parameters parameters) {
Camera.Size result=null;
for (Camera.Size size : parameters.getSupportedPreviewSizes()) {
if(size.width < size.height) continue; //we are only interested in landscape variants
if (result == null) {
result = size;
}
else {
int resultArea = result.width*result.height;
int newArea = size.width*size.height;
if (newArea > resultArea) {
result = size;
}
}
}
return(result);
}
private boolean prepareVideoRecorder(){
mRecorder = new MediaRecorder();
// Step 1: Unlock and set camera to MediaRecorder
mCamera.unlock();
mRecorder.setCamera(mCamera);
// Step 2: Set sources
mRecorder.setAudioSource(MediaRecorder.AudioSource.DEFAULT);
mRecorder.setVideoSource(MediaRecorder.VideoSource.DEFAULT);
//recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
// Step 3: Set a CamcorderProfile (requires API Level 8 or higher)
// Customise your profile based on a pre-existing profile
CamcorderProfile profile = CamcorderProfile.get(Camera.CameraInfo.CAMERA_FACING_FRONT, CamcorderProfile.QUALITY_LOW);
mRecorder.setProfile(profile);
// Step 4: Set output file
mRecorder.setOutputFile(new File(getFilesDir(), "movie-" + UUID.randomUUID().toString()).getAbsolutePath());
//recorder.setMaxDuration(50000); // 50 seconds
//recorder.setMaxFileSize(500000000); // Approximately 500 megabytes
mRecorder.setVideoSize(mPreviewWidth, mPreviewHeight);
// Step 5: Set the preview output
mRecorder.setPreviewDisplay(mSurfaceHolder.getSurface());
// Step 6: Prepare configured MediaRecorder
try {
mRecorder.prepare();
} catch (IllegalStateException e) {
Toast.makeText(getApplicationContext(), "exception: " + e.getMessage(), Toast.LENGTH_LONG).show();
releaseMediaRecorder();
return false;
} catch (IOException e) {
Toast.makeText(getApplicationContext(), "exception: " + e.getMessage(), Toast.LENGTH_LONG).show();
releaseMediaRecorder();
return false;
}
return true;
}
private void releaseMediaRecorder(){
if (mRecorder != null) {
mRecorder.reset(); // clear recorder configuration
mRecorder.release(); // release the recorder object
mRecorder = null;
mCamera.lock(); // lock camera for later use
}
}
private void releaseCamera(){
if (mCamera != null){
mCamera.release(); // release the camera for other applications
mCamera = null;
}
}
@Override
public void surfaceCreated(SurfaceHolder holder) {
// The Surface has been created, now tell the camera where to draw the preview.
Camera.Parameters parameters = mCamera.getParameters();
parameters.setRecordingHint(true);
Camera.Size size = getBestPreviewSize(parameters);
mCamera.setParameters(parameters);
//resize the view to the specified surface view width in layout
int newHeight = size.height / (size.width / mCameraContainerWidth);
mSurfaceView.getLayoutParams().height = newHeight;
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
mPreviewHeight = mCamera.getParameters().getPreviewSize().height;
mPreviewWidth = mCamera.getParameters().getPreviewSize().width;
mCamera.stopPreview();
try {
mCamera.setPreviewDisplay(mSurfaceHolder);
} catch (IOException e) {
e.printStackTrace();
}
mCamera.startPreview();
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
if (mIsRecording) {
stopRecording();
}
releaseMediaRecorder();
releaseCamera();
}
}दिसंबर 2017 तक, कुछ अपडेट किए गए हैं, उदाहरण के लिए अभी उपयोग android.hardware.Cameraको घटाया गया है। जबकि नया android.hardware.camera2एक तरह से काम के साथ आता है CameraManager।
मुझे व्यक्तिगत रूप से यह उदाहरण बहुत पसंद है, जो इस वर्तमान एपीआई का उपयोग करता है और आकर्षण की तरह काम करता है: https://github.com/googlesamples/android-Camera2Video
इसमें वीडियो रिकॉर्डिंग शुरू करने से पहले उपयोगकर्ता को शुरू में आवश्यक अनुमति और वीडियो पूर्वावलोकन की सुविधा भी शामिल है।
(इसके अलावा, मुझे कोड वास्तव में सुंदर लगता है (और यह मेरे लिए बहुत दुर्लभ है ^ ^), लेकिन यह सिर्फ मेरे व्यक्तिपरक राय है।)
स्केच से कोड लिखने के बजाय, आप GitHub पर लाइब्रेरी का उपयोग कर सकते हैं। उदाहरण के लिए: https://github.com/CameraKit/camerakit-android (या https://github.com/google/cameraview , या https://github.com/hujiaweibujidao/CameraView और इतने पर)। फिर आपको केवल निम्नलिखित की आवश्यकता है:
private CameraKitView cameraKitView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
cameraKitView = findViewById(R.id.camera);
}
@Override
protected void onStart() {
super.onStart();
cameraKitView.onStart();
}
@Override
protected void onResume() {
super.onResume();
cameraKitView.onResume();
}
@Override
protected void onPause() {
cameraKitView.onPause();
super.onPause();
}
@Override
protected void onStop() {
cameraKitView.onStop();
super.onStop();
}
@Override
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
cameraKitView.onRequestPermissionsResult(requestCode, permissions, grantResults);
}