我一直在尝试实施摄像机。但由于在record.start()上发生了这个神秘的错误(-16),它从未奏效。
这是我的代码:
private void initRecorder(int width, int height) {
recorder.setAudioSource(MediaRecorder.AudioSource.CAMCORDER);
recorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);
Parameters params = camera.getParameters();
List<Size> sizes = params.getSupportedPreviewSizes();
Size optimalSize = getOptimalPreviewSize(sizes, width, height);
params.setPreviewSize(optimalSize.width, optimalSize.height);
CamcorderProfile cpHigh = CamcorderProfile
.get(CamcorderProfile.QUALITY_LOW);
recorder.setProfile(cpHigh);
File mediaFile = null;
if (Environment.getExternalStorageState().equals(
Environment.MEDIA_MOUNTED)) {
mediaFile = new File(
android.os.Environment.getExternalStorageDirectory()
+ "/Towncare/Temp/vid_temp.3gpp");
if (!mediaFile.exists()) {
try {
mediaFile.getParentFile().mkdirs();
mediaFile.createNewFile();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
;
recorder.setOutputFile(android.os.Environment
.getExternalStorageDirectory() + "/Towncare/Temp/vid_temp.3gpp");
recorder.setMaxDuration(50000); // 50 seconds
recorder.setMaxFileSize(5000000);
}
private Size getOptimalPreviewSize(List<Size> sizes, int w, int h) {
final double ASPECT_TOLERANCE = 0.1;
double targetRatio = (double) w / h;
if (sizes == null)
return null;
Size optimalSize = null;
double minDiff = Double.MAX_VALUE;
int targetHeight = h;
// Try to find an size match aspect ratio and size
for (Size size : sizes) {
double ratio = (double) size.width / size.height;
if (Math.abs(ratio - targetRatio) > ASPECT_TOLERANCE)
continue;
if (Math.abs(size.height - targetHeight) < minDiff) {
optimalSize = size;
minDiff = Math.abs(size.height - targetHeight);
}
}
// Cannot find the one match the aspect ratio, ignore the requirement
if (optimalSize == null) {
minDiff = Double.MAX_VALUE;
for (Size size : sizes) {
if (Math.abs(size.height - targetHeight) < minDiff) {
optimalSize = size;
minDiff = Math.abs(size.height - targetHeight);
}
}
}
return optimalSize;
}
private void prepareRecorder() {
recorder.setPreviewDisplay(previewHolder.getSurface());
try {
recorder.prepare();
} catch (IllegalStateException e) {
e.printStackTrace();
finish();
} catch (IOException e) {
e.printStackTrace();
finish();
}
}
这是日志:
04-20 18:27:26.178:I / MediaRecorderJNI(13225):prepare:surface = 0x257468(identity = 1459) 04-20 18:27:27.548:E / MediaRecorder(13225):开始失败:-16 04-20 18:27:27.558:D / AndroidRuntime(13225):关闭虚拟机 04-20 18:27:27.558:W / dalvikvm(13225):threadid = 1:线程退出未捕获异常(组= 0x40018560) 04-20 18:27:27.578:E / AndroidRuntime(13225):致命异常:主要 04-20 18:27:27.578:E / AndroidRuntime(13225):java.lang.RuntimeException:start failed。 04-20 18:27:27.578:E / AndroidRuntime(13225):在android.media.MediaRecorder.start(Native Method) 04-20 18:27:27.578:E / AndroidRuntime(13225):at com.packagename.app.FullCameraActivity $ 3.onClick(FullCameraActivity.java:84) 04-20 18:27:27.578:E / AndroidRuntime(13225):在android.view.View.performClick(View.java:2506) 04-20 18:27:27.578:E / AndroidRuntime(13225):在android.view.View $ PerformClick.run(View.java:9116) 04-20 18:27:27.578:E / AndroidRuntime(13225):在android.os.Handler.handleCallback(Handler.java:587) 04-20 18:27:27.578:E / AndroidRuntime(13225):在android.os.Handler.dispatchMessage(Handler.java:92) 04-20 18:27:27.578:E / AndroidRuntime(13225):在android.os.Looper.loop(Looper.java:130) 04-20 18:27:27.578:E / AndroidRuntime(13225):在android.app.ActivityThread.main(ActivityThread.java:3835) 04-20 18:27:27.578:E / AndroidRuntime(13225):at java.lang.reflect.Method.invokeNative(Native Method) 04-20 18:27:27.578:E / AndroidRuntime(13225):at java.lang.reflect.Method.invoke(Method.java:507) 04-20 18:27:27.578:E / AndroidRuntime(13225):at com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run(ZygoteInit.java:864) 04-20 18:27:27.578:E / AndroidRuntime(13225):at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:622) 04-20 18:27:27.578:E / AndroidRuntime(13225):at dalvik.system.NativeStart.main(Native Method)
我知道有一些重复,但没有一个答案对我有用。请帮帮我。在此先感谢