后置摄像头的Android无法正常工作 [英] Back camera android not work
问题描述
我有一个问题。我想从执行示例应用程序
http://www.vogella.com/articles/AndroidCamera/article.html
有用。
但是,当在code CAMERA_FACING_FRONT变化CAMERA_FACING_BACK我看到LogCat中:相机错误-1
我执行它在我的三星Galaxy SII
私人诠释findFrontFacingCamera(){
INT cameraId = -1;
//搜索的前置摄像头
INT numberOfCameras = Camera.getNumberOfCameras();
的for(int i = 0; I< numberOfCameras;我++){
CameraInfo信息=新CameraInfo();
Camera.getCameraInfo(ⅰ,信息);
如果(info.facing == CameraInfo.CAMERA_FACING_FRONT){
Log.d(DEBUG_TAG相机找到了);
cameraId = I;
打破;
}
}
返回cameraId;
}
当前code
私人诠释findFrontFacingCamera(){
INT cameraId = -1;
//搜索的前置摄像头
INT numberOfCameras = Camera.getNumberOfCameras();
的for(int i = 0; I< numberOfCameras;我++){
CameraInfo信息=新CameraInfo();
Camera.getCameraInfo(ⅰ,信息);
如果(info.facing == CameraInfo.CAMERA_FACING_BACK){
Log.d(DEBUG_TAG相机发现+ info.facing);
cameraId = I;
打破;
}
}
返回cameraId;
}
logcat的:
21 04-30:14:36.400:D / MakePhotoActivity(8793):相机找到0
04-30 21:14:36.400:I /摄像机(8793):sendBroadcast intent.stop.app式应用
04-30 21:14:36.650:D / libEGL(8793):加载/system/lib/egl/libEGL_mali.so
04-30 21:14:36.655:D / libEGL(8793):加载/system/lib/egl/libGLESv1_CM_mali.so
04-30 21:14:36.660:D / libEGL(8793):加载/system/lib/egl/libGLESv2_mali.so
04-30 21:14:36.665:D /(8793):设备驱动程序API匹配
04-30 21:14:36.665:D /(8793):设备驱动程序API版本:10
04-30 21:14:36.665:D /(8793):用户空间API版本:10
04-30 21:14:36.665:D /(8793):马里:版本=的Linux r2p4-02rel0 BUILD_DATE =周四10月25日8时43分05秒KST 2012
04-30 21:14:36.685:D / OpenGLRenderer(8793):启用调试模式0
04-30 21:16:21.695:D / dalvikvm(8793):WAIT_FOR_CONCURRENT_GC受阻0毫秒
04-30 21:16:21.775:D / dalvikvm(8793):GC_EXPLICIT释放78K,免费9467K / 10883K 14%,暂停9ms的+ 4ms的,总82MS
04-30 21:16:22.010:E /摄像机(8793):错误-1
code的其余部分。
公共无效的onCreate(捆绑savedInstanceState){
super.onCreate(savedInstanceState);
的setContentView(R.layout.main); //我们有一个摄像头?
如果(!getPackageManager()
.hasSystemFeature(PackageManager.FEATURE_CAMERA)){
Toast.makeText(这一点,没有此设备上的相机,Toast.LENGTH_LONG)
。显示();
}其他{
cameraId = findFrontFacingCamera();
如果(cameraId℃,){
Toast.makeText(这一点,没有前置摄像头发现。
Toast.LENGTH_LONG).show();
}其他{
摄像头= Camera.open(cameraId);
}
}
} 公共无效的onClick(查看视图){ camera.takePicture(NULL,NULL,
新PhotoHandler(getApplicationContext()));
}
权限:
<使用许可权的android:NAME =android.permission.CAMERA/>
<使用许可权的android:NAME =android.permission.WRITE_EXTERNAL_STORAGE/>
<使用特征的android:NAME =android.hardware.camera/>
<使用许可权的android:NAME =android.permission.FLASHLIGHT/>
<使用特征的android:NAME =android.hardware.camera.autofocus/>
我建议加入一些日志中显示的值 info.facing
和 CameraInfo.CAMERA_FACING_FRONT
。 CAMERA_FACING_BACK
的值为0和 CAMERA_FACING_FRONT = 1
。检查 info.facing
的价值,这是什么设备返回
如果您要访问的朝后摄像头,你可以试试
相机= Camera.open();
。
有可能是硬件或设备的相关权限的原因,你得到一个运行时错误。
I have a problem. I want execute example app from http://www.vogella.com/articles/AndroidCamera/article.html It works. But when change in code CAMERA_FACING_FRONT to CAMERA_FACING_BACK I see in LogCat: Camera Error -1
I execute it on my Samsung Galaxy SII
private int findFrontFacingCamera() {
int cameraId = -1;
// Search for the front facing camera
int numberOfCameras = Camera.getNumberOfCameras();
for (int i = 0; i < numberOfCameras; i++) {
CameraInfo info = new CameraInfo();
Camera.getCameraInfo(i, info);
if (info.facing == CameraInfo.CAMERA_FACING_FRONT) {
Log.d(DEBUG_TAG, "Camera found");
cameraId = i;
break;
}
}
return cameraId;
}
Current code
private int findFrontFacingCamera() {
int cameraId = -1;
// Search for the front facing camera
int numberOfCameras = Camera.getNumberOfCameras();
for (int i = 0; i < numberOfCameras; i++) {
CameraInfo info = new CameraInfo();
Camera.getCameraInfo(i, info);
if (info.facing == CameraInfo.CAMERA_FACING_BACK) {
Log.d(DEBUG_TAG, "Camera found " + info.facing );
cameraId = i;
break;
}
}
return cameraId;
}
logCat:
04-30 21:14:36.400: D/MakePhotoActivity(8793): Camera found 0
04-30 21:14:36.400: I/Camera(8793): sendBroadcast intent.stop.app-in-app
04-30 21:14:36.650: D/libEGL(8793): loaded /system/lib/egl/libEGL_mali.so
04-30 21:14:36.655: D/libEGL(8793): loaded /system/lib/egl/libGLESv1_CM_mali.so
04-30 21:14:36.660: D/libEGL(8793): loaded /system/lib/egl/libGLESv2_mali.so
04-30 21:14:36.665: D/(8793): Device driver API match
04-30 21:14:36.665: D/(8793): Device driver API version: 10
04-30 21:14:36.665: D/(8793): User space API version: 10
04-30 21:14:36.665: D/(8793): mali: REVISION=Linux-r2p4-02rel0 BUILD_DATE=Thu Oct 25 08:43:05 KST 2012
04-30 21:14:36.685: D/OpenGLRenderer(8793): Enabling debug mode 0
04-30 21:16:21.695: D/dalvikvm(8793): WAIT_FOR_CONCURRENT_GC blocked 0ms
04-30 21:16:21.775: D/dalvikvm(8793): GC_EXPLICIT freed 78K, 14% free 9467K/10883K, paused 9ms+4ms, total 82ms
04-30 21:16:22.010: E/Camera(8793): Error -1
rest of code
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
// do we have a camera?
if (!getPackageManager()
.hasSystemFeature(PackageManager.FEATURE_CAMERA)) {
Toast.makeText(this, "No camera on this device", Toast.LENGTH_LONG)
.show();
} else {
cameraId = findFrontFacingCamera();
if (cameraId < 0) {
Toast.makeText(this, "No front facing camera found.",
Toast.LENGTH_LONG).show();
} else {
camera = Camera.open(cameraId);
}
}
}
public void onClick(View view) {
camera.takePicture(null, null,
new PhotoHandler(getApplicationContext()));
}
permission:
<uses-permission android:name="android.permission.CAMERA"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-feature android:name="android.hardware.camera" />
<uses-permission android:name="android.permission.FLASHLIGHT"/>
<uses-feature android:name="android.hardware.camera.autofocus" />
I suggest adding some logs to display the values of info.facing
and CameraInfo.CAMERA_FACING_FRONT
. CAMERA_FACING_BACK
has a value of 0 and CAMERA_FACING_FRONT = 1
. Check the value in info.facing
, which is what the device returns
If you're accessing the backfacing camera, you can try
camera = Camera.open();
.
There might be a hardware or device permission reason why you are getting a runtime error.
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