当我们按下“开始”按钮而不打开相机时，我的应用程序正在录制视频，并且在看到另一个按钮后单击它。 我希望当我们点击“开始”按钮时，它会记录它，但在后台（使用服务），我尝试但我没有成功。 当我点击开始时，我需要在关闭应用程序或转到其他应用程序时继续录制。 谁能告诉我怎么办呢？
我的xml代码：
<TextView
android:id="@+id/tvTitle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/app_name"
android:textSize="35dp"
android:layout_centerHorizontal="true"
android:layout_marginTop="10dp"/>
<TextView
android:id="@+id/tvTime"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="זמן הקלטה: "
android:textSize="19dp"
android:layout_below="@id/tvTitle"
android:layout_marginTop="70px"
android:layout_alignParentRight="true"/>
<EditText
android:id="@+id/etTime"
android:layout_width="500px"
android:layout_height="wrap_content"
android:layout_alignTop="@+id/tvTime"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true" />
<TextView
android:id="@+id/tvMail"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="אימייל:"
android:textSize="19dp"
android:layout_below="@id/tvTime"
android:layout_marginTop="70px"
android:layout_alignParentRight="true"/>
<EditText
android:id="@+id/etMail"
android:layout_width="500px"
android:layout_height="wrap_content"
android:layout_toLeftOf="@id/tvMail"
android:layout_alignParentLeft="true"
android:layout_alignTop="@id/tvMail"/>
<Button
android:id="@+id/btnStart"
android:layout_width="300px"
android:layout_height="300px"
android:layout_gravity="center|center"
android:background="@drawable/button_states"
android:text="Start"
android:textSize="25dp"
android:layout_marginTop="150px"
android:layout_centerHorizontal="true"
android:layout_below="@id/tvMail"/>
<Button
android:id="@+id/btnSave"
android:layout_width="55dp"
android:layout_height="55dp"
android:layout_gravity="center|center"
android:layout_marginTop="50px"
android:background="@drawable/button_states"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
android:layout_marginBottom="30px"
android:layout_marginRight="30px"
android:text=">" />
<SurfaceView
android:id="@+id/surfaceView"
android:layout_width="0.1dp"
android:layout_height="0.1dp"
android:layout_gravity="center|center"></SurfaceView>
这是我的代码：
public class VideoCapture extends Activity implements SurfaceHolder.Callback{
public static SurfaceView cameraView;
public static SurfaceHolder holder;
public static Camera mCamera;
public static boolean mPreviewRunning;
private Button btnStart,btnSave; // buttons of the app
private MediaRecorder recorder; // object for recording the videos
private CamcorderProfile cpHigh;
private boolean recording,savingEvidence = false;
private int counter;
private EditText etTime,etMail;
private View view;
private String firstVideo,secondVideo;
private Handler handler;
private File myvideoDirectory;; // file for new directory
private int recordTime; // time to record in ms
private String savePath; // string for saving the file in directory
private final int REFRESH_VIDEOS = 1;
private final int SAVE_EVIDENCE = 2;
/// </Variables>
/// <Getters and Setters functions>
// get the counter
public int getCounter() {
return counter;
}
// set the counter
public void setCounter(int counter) {
this.counter = counter;
}
/// </Getters and Setters functions>
/// <Activity's Functions>
@Override
protected void onResume() {
super.onResume();
}
@Override
protected void onStart() {
super.onStart();
}
/// </Activity's Functions>
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
// create a File object for the parent directory
savePath = "/sdcard/Recorder/";
myvideoDirectory = new File(savePath);
// have the object build the directory structure, if needed.
if (!myvideoDirectory.exists())
{
myvideoDirectory.mkdirs();
}
setContentView(R.layout.main);
// setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
initHandler();
// new media recorder object
recorder = new MediaRecorder();
// init the medica recorder object
initRecorder();
cameraView = (SurfaceView) findViewById(R.id.surfaceView);
holder = cameraView.getHolder();
holder.addCallback(this);
holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
//recordTime = 30000;
// button to record the video
btnStart = (Button) findViewById(R.id.btnStart); // get the Button object's id
btnStart.setOnClickListener(new View.OnClickListener()
{
@Override
// recording / stopping the video
public void onClick(View v)
{
/// <Variables>;
int timeInSeconds;
InputMethodManager imm;
/// </Variables>
if (!recording) // if we are not recording
{
try
{
etTime = (EditText)findViewById(R.id.etTime); // get the EdisText of the seconds to record object's id
etMail = (EditText)findViewById(R.id.etMail); // get the EditText of the mail to send the video
// toast's message to show error message of input error values
if(etMail.getText().toString().equals("") && etTime.getText().toString().equals(""))
Toast.makeText(getApplicationContext(), "Please write a valid number and email!", Toast.LENGTH_SHORT).show();
else
{
if(etMail.getText().toString().equals(""))
Toast.makeText(getApplicationContext(), "Please write a valid email!", Toast.LENGTH_SHORT).show();
else
{
if(etTime.getText().toString().equals(""))
Toast.makeText(getApplicationContext(), "Please write a valid number!", Toast.LENGTH_SHORT).show();
else
{
timeInSeconds = Integer.parseInt(etTime.getText().toString()); // parse from text to int
recordTime = timeInSeconds * 1000;
recording = true; // change the boolen valut to true because we are recording now
Toast.makeText(getApplicationContext(), "Recording Started", Toast.LENGTH_SHORT).show();
recorder.start(); // start recording
btnSave.setVisibility(View.VISIBLE); // enable the button
btnStart.setText("Stop"); // set the text to Stop
handler.sendEmptyMessageDelayed(REFRESH_VIDEOS, recordTime);
}
}
}
// hide the keyboard
view = getCurrentFocus();
if (view != null)
{
imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
imm.hideSoftInputFromWindow(view.getWindowToken(), 0);
}
// create a new intent for Service's object to record in background
}
catch (Exception e)
{
// hide the keyboard
view = getCurrentFocus();
if(view != null)
{
imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
imm.hideSoftInputFromWindow(view.getWindowToken(),0);
}
}
}
else // if we are already recording
{
recording = false; // change the boolen valut to false because we are not recording now
btnSave.setVisibility(View.GONE); // enable the button
btnStart.setText("Start"); // set the text to Start
stopRecording(); // stop recording
}
}
});
// button to save the video
btnSave = (Button) findViewById(R.id.btnSave); // get the Button object's id
btnSave.setVisibility(View.GONE); // disable the button
btnSave.setOnClickListener(new View.OnClickListener()
{
@Override
// saving the last 30 seconds
public void onClick(View v)
{
savingEvidence = true;// Stop the REFRESH_VIDEOS "thread"
handler.sendEmptyMessageDelayed(SAVE_EVIDENCE,recordTime); // Stop the current video after recordTime seconds
// SAVE_EVIDENCE(message) , recordTime(object)
}
});
}
/// <Functions>
// init the media recorder object
private void initRecorder()
{
recorder.setAudioSource(MediaRecorder.AudioSource.DEFAULT);
//recorder.setVideoSource(MediaRecorder.VideoSource.DEFAULT);
recorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);
cpHigh = CamcorderProfile.get(CamcorderProfile.QUALITY_HIGH);
recorder.setProfile(cpHigh); // Set the video output format and encoding
// create a string for saving the video
String videoName = savePath + "Record " + getCounter() + ".mp4";
recorder.setOutputFile(videoName);
firstVideo = videoName;
setCounter(++counter); // count the number of the videos
//recorder.setMaxDuration(5000); // 5 seconds
}
// prepare the recorder before we are recording
private void prepareRecorder() {
recorder.setPreviewDisplay(holder.getSurface()); // get the surface object
try
{
recorder.prepare(); // prepare the media recorder object , its very important to
// prepare the object before we are recording
}
catch (IllegalStateException e)
{
e.printStackTrace();
finish();
}
catch (IOException e)
{
e.printStackTrace();
finish();
}
}
// init the handler object
public void initHandler()
{
handler = new Handler(new Handler.Callback()
{
@RequiresApi(api = Build.VERSION_CODES.N)
@Override
public boolean handleMessage(Message message)
{
switch (message.what)
{
case REFRESH_VIDEOS:
// Validations
if(savingEvidence || !recording)
{ break; }
// Stop the first video
recorder.stop(); // stop recording
// Show a message for saving the video
Toast.makeText(getApplicationContext(), "Video saved! \n" + firstVideo, Toast.LENGTH_SHORT).show();
// delete the second video
if(secondVideo != null)
{
File file = new File(secondVideo);
file.delete();
}
// Change the name of the second video to first video
secondVideo = firstVideo;
// Start new video
initRecorder();
prepareRecorder();
recorder.start(); // start recording
// call handler for maximum 10 seconds and stop the video
handler.sendEmptyMessageDelayed(REFRESH_VIDEOS,recordTime);
break;
case SAVE_EVIDENCE:
// stop the first video
//stopRecording(); // stop recording
recorder.stop();
// Show a message for saving the video's evidence
Toast.makeText(getApplicationContext(), "Evidence saved! " + "\n" +firstVideo , Toast.LENGTH_SHORT).show();
// move firstvideo and secondvideo to private folder
Date dt = new Date(); // get the date
int hours = dt.getHours(); // get the hour now
int minutes = dt.getMinutes(); // get the minutes now
int seconds = dt.getSeconds(); // get the seconds now
// get the time
String curTime = hours + ":" + minutes + ":" + seconds;
// saving the videos with the time and the date
String firstPath = savePath + "Evidence - " + curTime+"/";
String secondPath = savePath + "Evidence - " + curTime+"/";
moveFile(firstVideo, firstPath, "1.mp4");
moveFile(secondVideo, secondPath,"2.mp4");
firstPath += "1.mp4";
secondPath += "2.mp4";
// resume REFRESH_VIDEOS
handler.sendEmptyMessageDelayed(REFRESH_VIDEOS,recordTime);
savingEvidence = false;
// creating intent object of SendingEmail class for sending a email
String[] TO = {((EditText)findViewById(R.id.etMail)).getText().toString()};
Intent emailIntent = new Intent(Intent.ACTION_SEND);
emailIntent.setType("vnd.android.cursor.dir/email");
emailIntent.putExtra(Intent.EXTRA_EMAIL,TO);
emailIntent.putExtra(Intent.EXTRA_STREAM, Uri.parse("file://"+firstPath));
emailIntent.putExtra(Intent.EXTRA_SUBJECT,"Evidence");
startActivity(Intent.createChooser(emailIntent,"Send Email..."));
// Start new video
initRecorder();
prepareRecorder();
recorder.start(); // start recording
break;
}
return false;
}
});
}
// Stops the recording
private void stopRecording()
{
// stop new video
Toast.makeText(getBaseContext(), "Recording Stopped", Toast.LENGTH_SHORT).show();
recorder.stop();
initRecorder();
prepareRecorder();
}
// when the surface just created in the first time
public void surfaceCreated(SurfaceHolder holder)
{
prepareRecorder();
}
// when we want to change a details of the surface object
public void surfaceChanged(SurfaceHolder holder, int format, int width,
int height)
{
}
// when the surface object is gonna die
public void surfaceDestroyed(SurfaceHolder holder)
{
if (recording) // if we are recording
{
recorder.stop(); // stop recording
recording = false;
}
recorder.release(); // release the media recorder object , its very important if we want to use again
finish();
}
// move the files to new directory for saving the video's evidence
private void moveFile(String videoPath, String outputPath, String videoName)
{
InputStream in = null;
OutputStream out = null;
try
{
File dir = new File (outputPath);
// if the directory isn't exist
if (!dir.exists())
{
dir.mkdirs();
}
in = new FileInputStream(videoPath);
out = new FileOutputStream(outputPath + videoName);
byte[] buffer = new byte[1024];
int read;
while ((read = in.read(buffer)) != -1)
{
out.write(buffer, 0, read);
}
in.close();
in = null;
// write the output file
out.flush();
out.close();
out = null;
// delete the second video
File file = new File(videoPath);
file.delete();
}
catch (FileNotFoundException e1)
{
Log.e("tag", e1.getMessage());
}
catch (Exception e)
{
Log.e("tag", e.getMessage());
}
}
/// </Functions>
}
答案 0 :(得分：-1)
如果你想添加服务而不是像你这样在你的包中添加新类，并通过服务扩展
class Test extends Services{
}
现在将其添加到您的Mainefest.xml中并在Activity
中使用此服务在Test Service类
上添加计时器 public class TestService extends Service {
public final String TAG = TestService.this.getClass().getSimpleName();
// constant
public static final long NOTIFY_INTERVAL = 10 * 1000; //Call every 10 sec
// run on another Thread to avoid crash
private Handler mHandler = new Handler();
// timer handling
private Timer mTimer = null;
@Override
public IBinder onBind(Intent intent) {
return null;
}
@Override
public void onCreate() {
// cancel if already existed
if (mTimer != null) {
mTimer.cancel();
} else {
// recreate new
mTimer = new Timer();
}
// schedule task
mTimer.scheduleAtFixedRate(new TimeDisplayTimerTask(), 0, NOTIFY_INTERVAL);
}
class TimeDisplayTimerTask extends TimerTask {
@Override
public void run() {
// run on another thread
mHandler.post(new Runnable() {
@Override
public void run() {
//Here your Video Recording code which call every 10 sec
}
});
}
}
}