如何在 KitKat 4.4 中以编程方式录制 Android 屏幕视频
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【中文标题】如何在 KitKat 4.4 中以编程方式录制 Android 屏幕视频【英文标题】:How to Record Android Screen Video programmatically in KitKat 4.4 【发布时间】:2014-07-11 02:09:21 【问题描述】:我知道这个问题已经被问过很多次,并且有很多问题、答案和讨论可用。但我不知道该做什么不该做什么。
我已经参考了下面的链接来获得解决方案,但没有成功。
https://***.com/questions/23438767/how-to-record-video-on-kitkat-4-4https://***.com/questions/23185125/i-cannot-screen-record-with-my-kitkat-4-4-moto-xandroid KitKat start screenrecord from Appscreen recorder with kitkatScreen Recording kitkat with button
通过大量搜索,我没有得到任何简单的示例来完成这项任务。两天以来,我一直在努力实现这一目标,但没有成功。
所以简单的问题是是否可以在android中录制我们自己屏幕的视频。我刚刚听说可以从 android 4.4 Kitkat 开始,我还检查了市场上的一些应用程序。
我知道要做到这一点,我们的设备应该是 root 和其他需要这样做的东西。
但我不知道如何以编程方式开发它。如果有人有任何想法,请指导我如何做到这一点。或任何示例或代码都会有很大帮助。
感谢您的任何帮助。
我尝试使用这段简单的代码进行开发,但没有得到任何东西
public void startRecording(View v)
File recordfolder = Environment.getExternalStorageDirectory();
String record = "su — bit rate 8000000 --time-limit 30 "
+ recordfolder + "Record.mp4";
recordfolder.mkdir();
try
Process screenrecording = Runtime.getRuntime().exec(record);
catch (IOException e)
e.printStackTrace();
所以基本上我不知道我与这个Process screenrecording
有什么关系,我的意思是我怎样才能开始进步。
【问题讨论】:
我也有兴趣知道这一点,最好没有根要求。 嘿@user3660803,这个问题已经很久没有提出来了。从那以后你有什么新的见解吗? 【参考方案1】:好问题但是答案取决于你想用什么类型的平台在android中录制屏幕。
这里有一些技巧.....
1) 使用这个类,您可以记录您需要 root 设备的屏幕堡垒,您也可以在 genymotion 4.4 中进行测试。
public static class MainFragment extends Fragment
private Context mContext;
private EditText mWidthEditText;
private EditText mHeightEditText;
private EditText mBitrateEditText;
private EditText mTimeEditText;
private Button mRecordButton;
public MainFragment()
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState)
View rootView = inflater.inflate(R.layout.fragment_main, container,
false);
mContext = getActivity();
mRecordButton = (Button) rootView.findViewById(R.id.btn_record);
mRecordButton.setOnClickListener(RecordOnClickListener);
mWidthEditText = (EditText) rootView.findViewById(R.id.et_width);
mHeightEditText = (EditText) rootView.findViewById(R.id.et_height);
mBitrateEditText = (EditText) rootView
.findViewById(R.id.et_bitrate);
mBitrateEditText.addTextChangedListener(BitrateTextWatcher);
mTimeEditText = (EditText) rootView.findViewById(R.id.et_time);
mTimeEditText.addTextChangedListener(TimeTextWatcher);
return rootView;
private TextWatcher BitrateTextWatcher = new TextWatcher()
@Override
public void beforeTextChanged(CharSequence charSequence, int i,
int i2, int i3)
// Not used.
@Override
public void onTextChanged(CharSequence charSequence, int i, int i2,
int i3)
if (TextUtils.isEmpty(charSequence))
return;
int value = Integer.valueOf(charSequence.toString());
if (value > 50 || value == 0)
mBitrateEditText.setError(mContext
.getString(R.string.error_bitrate_edittext));
return;
mTimeEditText.setError(null);
@Override
public void afterTextChanged(Editable editable)
// Not used.
;
private TextWatcher TimeTextWatcher = new TextWatcher()
@Override
public void beforeTextChanged(CharSequence charSequence, int i,
int i2, int i3)
// Not used.
@Override
public void onTextChanged(CharSequence charSequence, int i, int i2,
int i3)
if (TextUtils.isEmpty(charSequence))
return;
int value = Integer.valueOf(charSequence.toString());
if (value > 180 || value == 0)
mTimeEditText.setError(mContext
.getString(R.string.error_time_editext));
return;
mTimeEditText.setError(null);
@Override
public void afterTextChanged(Editable editable)
// Not used.
;
private View.OnClickListener RecordOnClickListener = new View.OnClickListener()
@Override
public void onClick(View view)
if (!TextUtils.isEmpty(mTimeEditText.getError())
|| !TextUtils.isEmpty(mBitrateEditText.getError()))
Toast.makeText(mContext,
mContext.getString(R.string.toast_invalid_values),
Toast.LENGTH_LONG).show();
return;
boolean widthSet = !TextUtils.isEmpty(mWidthEditText.getText());
boolean heightSet = !TextUtils.isEmpty(mHeightEditText
.getText());
if ((!widthSet && heightSet) || (widthSet && !heightSet))
Toast.makeText(mContext,
mContext.getString(R.string.error_invalid_wxh),
Toast.LENGTH_LONG).show();
return;
boolean bitrateSet = !TextUtils.isEmpty(mBitrateEditText
.getText());
boolean timeSet = !TextUtils.isEmpty(mTimeEditText.getText());
StringBuilder stringBuilder = new StringBuilder(
"/system/bin/screenrecord");
if (widthSet)
stringBuilder.append(" --size ")
.append(mWidthEditText.getText()).append("x")
.append(mHeightEditText.getText());
if (bitrateSet)
stringBuilder.append(" --bit-rate ").append(
mBitrateEditText.getText());
if (timeSet)
stringBuilder.append(" --time-limit ").append(
mTimeEditText.getText());
// TODO User definable location.
stringBuilder
.append(" ")
.append(Environment.getExternalStorageDirectory()
.toString()).append("/recording.mp4");
Log.d("TAG", "comamnd: " + stringBuilder.toString());
try
new SuTask(stringBuilder.toString().getBytes("ASCII"))
.execute();
catch (UnsupportedEncodingException e)
e.printStackTrace();
;
private class SuTask extends AsyncTask<Boolean, Void, Boolean>
private final byte[] mCommand;
public SuTask(byte[] command)
super();
this.mCommand = command;
@Override
protected Boolean doInBackground(Boolean... booleans)
try
Process sh = Runtime.getRuntime().exec("su", null, null);
OutputStream outputStream = sh.getOutputStream();
outputStream.write(mCommand);
outputStream.flush();
outputStream.close();
final NotificationManager notificationManager = (NotificationManager) mContext
.getSystemService(NOTIFICATION_SERVICE);
notificationManager.notify(RUNNING_NOTIFICATION_ID,
createRunningNotification(mContext));
sh.waitFor();
return true;
catch (InterruptedException e)
e.printStackTrace();
Toast.makeText(mContext,
mContext.getString(R.string.error_start_recording),
Toast.LENGTH_LONG).show();
catch (IOException e)
e.printStackTrace();
Toast.makeText(mContext,
mContext.getString(R.string.error_start_recording),
Toast.LENGTH_LONG).show();
return false;
@Override
protected void onPostExecute(Boolean bool)
super.onPostExecute(bool);
if (bool)
final NotificationManager notificationManager = (NotificationManager) mContext
.getSystemService(NOTIFICATION_SERVICE);
notificationManager.cancel(RUNNING_NOTIFICATION_ID);
File file = new File(Environment
.getExternalStorageDirectory().toString()
+ "/recording.mp4");
notificationManager.notify(FINISHED_NOTIFICATION_ID,
createFinishedNotification(mContext, file));
private Notification createRunningNotification(Context context)
Notification.Builder mBuilder = new Notification.Builder(
context)
.setSmallIcon(android.R.drawable.stat_notify_sdcard)
.setContentTitle(
context.getResources().getString(
R.string.app_name))
.setContentText("Recording Running")
.setTicker("Recording Running")
.setPriority(Integer.MAX_VALUE).setOngoing(true);
return mBuilder.build();
private Notification createFinishedNotification(Context context,
File file)
Intent intent = new Intent();
intent.setAction(Intent.ACTION_VIEW);
intent.setDataAndType(Uri.fromFile(file), "video/mp4");
PendingIntent pendingIntent = PendingIntent.getActivity(
context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
Notification.Builder mBuilder = new Notification.Builder(
context)
.setSmallIcon(android.R.drawable.stat_notify_sdcard)
.setContentTitle(
context.getResources().getString(
R.string.app_name))
.setContentText("Recording Finished")
.setTicker("Recording Finished")
.setContentIntent(pendingIntent).setOngoing(false)
.setAutoCancel(true);
return mBuilder.build();
2)您可以捕获屏幕截图并从中制作视频,它适用于 3.0+ 设备。要将图像转换为视频,您可以使用 FFMPEG 或 JavaCV。
-对于 Rooted 设备(因为您也可以捕获键盘屏幕)
if (Environment.MEDIA_MOUNTED.equals(Environment
.getExternalStorageState()))
// we check if external storage is\ available, otherwise
// display an error message to the user using Toast Message
File sdCard = Environment.getExternalStorageDirectory();
File directory = new File(sdCard.getAbsolutePath() + "/ScreenShots");
directory.mkdirs();
String filename = "screenshot_jpeg_" + i + ".png";
File yourFile = new File(directory, filename);
try
Process sh = Runtime.getRuntime().exec("su", null, null);
OutputStream os = sh.getOutputStream();
os.write(("/system/bin/screencap -p " + "/sdcard/ScreenShots/" + filename).getBytes("ASCII"));
os.flush();
os.close();
sh.waitFor();
i++;
catch (Exception e)
e.printStackTrace();
-对于没有 Rooted 的设备(因为您无法捕获键盘屏幕)
if (Environment.MEDIA_MOUNTED.equals(Environment
.getExternalStorageState()))
// we check if external storage is\ available, otherwise
// display an error message to the user using Toast Message
File sdCard = Environment.getExternalStorageDirectory();
File directory = new File(sdCard.getAbsolutePath() + "/ScreenShots");
directory.mkdirs();
String filename = "screenshot_jpeg_" + i + ".png";
File yourFile = new File(directory, filename);
try
Process sh = Runtime.getRuntime().exec("su", null, null);
OutputStream os = sh.getOutputStream();
os.write(("/system/bin/screencap -p " + "/sdcard/ScreenShots/" + filename).getBytes("ASCII"));
os.flush();
os.close();
sh.waitFor();
i++;
catch (Exception e)
e.printStackTrace();
【讨论】:
您的带和不带 root 的代码是相同的。你的意思是在上一个示例中调用su
吗?
@emkman 是的,您必须为 root 设备授予 su 权限。
是的,但是无根设备(无键盘)呢?你的两个例子是相同的。
第一组代码适用于我使用 genymotion 4.4 请注意在使用 genymotion 测试时将外部存储路径更改为 /mnt/shell/emulated/0 而不是使用 Environment.getExternalStorage() 4.4 或有根的 4.4 设备模拟器检查此答案以获取有关目录路径更改的更多详细信息***.com/a/20734816/2644384
@SmitPatel:我在没有 root 的设备上发现异常:行中的 null 环境:“Process sh = Runtime.getRuntime().exec("su", null, null);"以上是关于如何在 KitKat 4.4 中以编程方式录制 Android 屏幕视频的主要内容,如果未能解决你的问题,请参考以下文章
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