Android高通 12/13 录屏流程代码位置

 需求如下图 实现系统录屏功能 

frameworks/base/packages/SystemUI/src/com/android/systemui/screenrecord

涉及代码

ScreenRecordDialog # startBtn

RecordingService # start # end 

ScreenMediaRecorder.java

1、点击开始录屏frameworks/base/packages/SystemUI/src/com/android/systemui/screenrecord/ScreenRecordDialog.java

 startBtn.setOnClickListener(v -> {
            if (mOnStartRecordingClicked != null) {
                // Note that it is important to run this callback before dismissing, so that the
                // callback can disable the dialog exit animation if it wants to.
                mOnStartRecordingClicked.run();
            }

            requestScreenCapture();
            dismiss();
        });

2、ScreenRecordDialog #requestScreenCapture核心代码实现功能 

private void requestScreenCapture() {
        Context userContext = mUserContextProvider.getUserContext();
        ScreenRecordingAudioSource audioMode = mAudioSwitch.isChecked()
                ? (ScreenRecordingAudioSource) mOptions.getSelectedItem()
                : NONE;
        PendingIntent startIntent = PendingIntent.getForegroundService(userContext,
                RecordingService.REQUEST_CODE,
                RecordingService.getStartIntent(
                        userContext, Activity.RESULT_OK,
                        audioMode.ordinal()),
                PendingIntent.FLAG_UPDATE_CURRENT | PendingIntent.FLAG_IMMUTABLE);
        PendingIntent stopIntent = PendingIntent.getService(userContext,
                RecordingService.REQUEST_CODE,
                RecordingService.getStopIntent(userContext),
                PendingIntent.FLAG_UPDATE_CURRENT | PendingIntent.FLAG_IMMUTABLE);
        mController.startCountdown(DELAY_MS, INTERVAL_MS, startIntent, stopIntent);
    }
}

3、RecordingService 中实现开始录屏功能 代码如下图所示

 case ACTION_START:
                mAudioSource = ScreenRecordingAudioSource
                        .values()[intent.getIntExtra(EXTRA_AUDIO_SOURCE, 0)];
                Log.d(TAG, "recording with audio source" + mAudioSource);

                mRecorder = new ScreenMediaRecorder(
                        mUserContextTracker.getUserContext(),
                        currentUserId,
                        mAudioSource,
                        this
                );

                if (startRecording()) {
                    updateState(true);
                    createRecordingNotification();
                    mUiEventLogger.log(Events.ScreenRecordEvent.SCREEN_RECORD_START);
                } else {
                    updateState(false);
                    createErrorNotification();
                    stopForeground(true);
                    stopSelf();
                    return Service.START_NOT_STICKY;
                }
                break;

4、ScreenMediaRecorder 调用start方法开始录屏 

  * Start screen recording
    */
    void start() throws IOException, RemoteException, RuntimeException {
        Log.d(TAG, "start recording");
        prepare();
        mMediaRecorder.start();
        recordInternalAudio();
    }

5、ScreenMediaRecorder停止录屏 调用代码路径 

/**
     * End screen recording
     */
    void end() {
        mMediaRecorder.stop();
        mMediaRecorder.release();
        mInputSurface.release();
        mVirtualDisplay.release();
        mMediaProjection.stop();
        mMediaRecorder = null;
        mMediaProjection = null;
        stopInternalAudioRecording();

        Log.d(TAG, "end recording");
    }

到这里基本结束了，转载请注明出处Android高通 12/13 录屏流程代码位置-CSDN博客，谢谢！