我已在三星平板电脑上测试过我的代码并注意，但相同的代码却没有 致力于nexus。
我知道nexus只有前置摄像头，而摄像头正在打开但是 克服开始录制按钮它崩溃....我检查了它 通过setProfile上的错误。
我的代码：
public boolean prepareVideoRecorder() {
Toast.makeText(context, "Please wait..", Toast.LENGTH_SHORT).show();
// mCamera = getCameraInstance();
mMediaRecorder = new MediaRecorder();
// Step 1: Unlock and set camera to MediaRecorder
mCamera.stopPreview();
mCamera.unlock();
mMediaRecorder.setCamera(mCamera);
// Step 2: Set sources
mMediaRecorder.setAudioSource(MediaRecorder.AudioSource.CAMCORDER);
mMediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);
int layout = getResources().getConfiguration().screenLayout
& Configuration.SCREENLAYOUT_SIZE_MASK;
if (layout == Configuration.SCREENLAYOUT_SIZE_XLARGE) {
switch (((WindowManager) getSystemService(WINDOW_SERVICE))
.getDefaultDisplay().getOrientation()) {
case ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE: {
// Toast.makeText(context, "SCREEN_ORIENTATION_LANDSCAPE", Toast.LENGTH_SHORT).show();
int degrees = 0;
android.hardware.Camera.CameraInfo info = new android.hardware.Camera.CameraInfo();
int result;
if (info.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) {
result = (info.orientation + degrees) % 360;
result = (360 - result) % 360; // compensate the mirror
// Toast.makeText(context, "SCREEN_ORIENTATION_LANDSCAPE 1111", Toast.LENGTH_SHORT).show();
} else { // back-facing
result = (info.orientation - degrees + 360) % 360;
// Toast.makeText(context, "SCREEN_ORIENTATION_LANDSCAPE 222-- "+ result, Toast.LENGTH_SHORT).show();
}
mMediaRecorder.setOrientationHint(result);
break;
}
case ActivityInfo.SCREEN_ORIENTATION_PORTRAIT: {
// Toast.makeText(context, "SCREEN_ORIENTATION_PORTRAIT", Toast.LENGTH_SHORT).show();
int degrees = 270;
android.hardware.Camera.CameraInfo info = new android.hardware.Camera.CameraInfo();
int result;
if (CurrentValues.cur_cam_face == 1) {
// Toast.makeText(context, "SCREEN_ORIENTATION_PORTRAIT 111", Toast.LENGTH_SHORT).show();
result = (info.orientation + degrees) % 360;
result = (360 - result) % 360; // compensate the mirror
// System.out.println("FRONT CAMERA )))))))");
} else { // back-facing
// Toast.makeText(context, "SCREEN_ORIENTATION_PORTRAIT 222", Toast.LENGTH_SHORT).show();
result = degrees;// (info.orientation - degrees + 360) % 360;
// System.out.println("BACK CAMERA )))))))");
}
mMediaRecorder.setOrientationHint(result);
break;
}
case Configuration.ORIENTATION_LANDSCAPE: {
// Toast.makeText(context, "ORIENTATION_LANDSCAPE", Toast.LENGTH_LONG).show();
int degrees = 180;
android.hardware.Camera.CameraInfo info = new android.hardware.Camera.CameraInfo();
int result;
if (info.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) {
// Toast.makeText(context, "ORIENTATION_LANDSCAPE 111", Toast.LENGTH_SHORT).show();
result = (info.orientation + degrees) % 360;
result = (360 - result) % 360; // compensate the mirror
} else { // back-facing
// Toast.makeText(context, "ORIENTATION_LANDSCAPE 22", Toast.LENGTH_SHORT).show();
result = (info.orientation - degrees + 360) % 360;
}
mMediaRecorder.setOrientationHint(result);
break;
}
default: {
//Toast.makeText(context, "DEFAULT 11", Toast.LENGTH_SHORT).show();
int degrees = 90;
android.hardware.Camera.CameraInfo info = new android.hardware.Camera.CameraInfo();
int result;
if (CurrentValues.cur_cam_face == 1) {
result = (info.orientation + degrees) % 360;
result = (360 - result) % 360; // compensate the mirror
} else { // back-facing
result = degrees;// (info.orientation - degrees + 360) % 360;
}
mMediaRecorder.setOrientationHint(result);
}
}
}else if (layout == Configuration.SCREENLAYOUT_SIZE_LARGE) {
switch (((WindowManager) getSystemService(WINDOW_SERVICE))
.getDefaultDisplay().getOrientation()) {
case ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE: {
Toast.makeText(context, "PORTRAIT " + ActivityInfo.SCREEN_ORIENTATION_PORTRAIT, Toast.LENGTH_SHORT).show();
int degrees = 0;
android.hardware.Camera.CameraInfo info = new android.hardware.Camera.CameraInfo();
int result;
if (info.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) {
result = (info.orientation + degrees) % 360;
result = (360 - result) % 360; // compensate the mirror
Toast.makeText(context, "SCREEN_PORTRAIT 1111", Toast.LENGTH_SHORT).show();
} else { // back-facing
result = (info.orientation - degrees + 360) % 360;
Toast.makeText(context, "SCREEN_PORTRAIT 222-- "+ result, Toast.LENGTH_SHORT).show();
}
mMediaRecorder.setOrientationHint(result);
break;
}
case ActivityInfo.SCREEN_ORIENTATION_PORTRAIT: {
Toast.makeText(context, "else LANDSCAPE " +ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE, Toast.LENGTH_SHORT).show();
int degrees = 90;
android.hardware.Camera.CameraInfo info = new android.hardware.Camera.CameraInfo();
int result;
if (CurrentValues.cur_cam_face == 1) {
result = (info.orientation + degrees) % 360;
result = (360 - result) % 360; // compensate the mirror
} else { // back-facing
result = degrees;// (info.orientation - degrees + 360) % 360;
}
mMediaRecorder.setOrientationHint(result);
break;
}
}
}else
{
switch (((WindowManager) getSystemService(WINDOW_SERVICE))
.getDefaultDisplay().getOrientation()) {
case ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE: {
Toast.makeText(context, "PORTRAIT " + ActivityInfo.SCREEN_ORIENTATION_PORTRAIT, Toast.LENGTH_SHORT).show();
int degrees = 0;
android.hardware.Camera.CameraInfo info = new android.hardware.Camera.CameraInfo();
int result;
if (info.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) {
result = (info.orientation + degrees) % 360;
result = (360 - result) % 360; // compensate the mirror
Toast.makeText(context, "SCREEN_PORTRAIT 1111", Toast.LENGTH_SHORT).show();
} else { // back-facing
result = (info.orientation - degrees + 360) % 360;
Toast.makeText(context, "SCREEN_PORTRAIT 222-- "+ result, Toast.LENGTH_SHORT).show();
}
mMediaRecorder.setOrientationHint(result);
break;
}
case ActivityInfo.SCREEN_ORIENTATION_PORTRAIT: {
Toast.makeText(context, "else LANDSCAPE " +ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE, Toast.LENGTH_SHORT).show();
int degrees = 90;
android.hardware.Camera.CameraInfo info = new android.hardware.Camera.CameraInfo();
int result;
if (CurrentValues.cur_cam_face == 1) {
result = (info.orientation + degrees) % 360;
result = (360 - result) % 360; // compensate the mirror
} else { // back-facing
result = degrees;// (info.orientation - degrees + 360) % 360;
}
mMediaRecorder.setOrientationHint(result);
break;
}
}
}
// Step 3: Set a CamcorderProfile (requires API Level 8 or higher)
CamcorderProfile camcorderProfile_HQ;
if (CurrentValues.cur_cam_face == 1)
camcorderProfile_HQ = CamcorderProfile.get(CamcorderProfile.QUALITY_LOW);
else
camcorderProfile_HQ = CamcorderProfile.get(CamcorderProfile.QUALITY_HIGH);
mMediaRecorder.setProfile(camcorderProfile_HQ);
// Step 4: Set output file
mMediaRecorder.setOutputFile(getOutputMediaFile(MEDIA_TYPE_VIDEO)
.toString());
// Step 5: Set the preview output
mMediaRecorder.setPreviewDisplay(mPreview.getHolder().getSurface());
// Step 6: Prepare configured MediaRecorder
try {
mMediaRecorder.prepare();
} catch (IllegalStateException e) {
Log.d(TAG,
"IllegalStateException preparing MediaRecorder: "
+ e.getMessage());
releaseMediaRecorder();
return false;
} catch (IOException e) {
Log.d(TAG, "IOException preparing MediaRecorder: " + e.getMessage());
releaseMediaRecorder();
return false;
}
return true;
}
答案 0 :(得分：1)
假设您正在尝试最新的Nexus 7，我觉得问题可能是您的设备的QUALITY_HIGH中media_profiles.xml 未定义。我查看了AOSP树here，发现只定义了CIF，QCIF，480p及其失时版本。您可以在media_profiles.xml上查看设备上的/etc/media_profiles.xml来确认这一点。
您可以调整代码以使用CamcorderProfile.QUALITY_480P代替CamcorderProfile.QUALITY_HIGH。
答案 1 :(得分：0)
我发现您的代码存在一些问题，其中任何一个都可能导致您的错误。
首先，仅仅创建一个CameraInfo对象是不够的，你必须调用：
Camera.getCameraInfo(cameraId, info);
如果没有此调用，面向和方向（默认整数值）将始终为0。
其次，您还应该使用接受cameraId的方法获取配置文件：
CamcorderProfile.get(cameraId, quality);
我假设您正在使用Camera.open（int cameraId）方法，否则您可能无法使用任何前置摄像头。
另外，这只是惯例，但我建议你将switch语句中的方向代码分解为可读性函数。切换情况理想情况下应该只有一行，但几行仍然没问题。