ERROR: failed to connect to camera service @ Android marshmallow
ERROR: failed to connect to camera service @ Android marshmallow
我正在尝试构建一个相机应用程序（我对此很陌生）
当我 运行 真实设备上的应用程序时，它给了我这个错误：
05-26 13:16:37.504 14076-14076/involved.pose9 E/AndroidRuntime: FATAL EXCEPTION: main
Process: involved.pose9, PID: 14076
java.lang.RuntimeException: Fail to connect to camera service
at android.hardware.Camera.<init>(Camera.java:511)
at android.hardware.Camera.open(Camera.java:368)
at involved.pose9.CameraActivity.surfaceCreated(CameraActivity.java:63)
at android.view.SurfaceView.updateWindow(SurfaceView.java:582)
at android.view.SurfaceView.onPreDraw(SurfaceView.java:177)
at android.view.ViewTreeObserver.dispatchOnPreDraw(ViewTreeObserver.java:944)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2067)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1119)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6060)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:858)
at android.view.Choreographer.doCallbacks(Choreographer.java:670)
at android.view.Choreographer.doFrame(Choreographer.java:606)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:844)
at android.os.Handler.handleCallback(Handler.java:746)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5443)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:728)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
这是我的Class
import android.graphics.PixelFormat;
import android.hardware.Camera;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.Window;
import android.view.WindowManager;
import java.io.IOException;
public class CameraActivity extends AppCompatActivity implements SurfaceHolder.Callback {
SurfaceHolder mSurfaceHolder;
SurfaceView mSurfaceView;
public Camera mCamera;
boolean mPreviewRunning;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getWindow().setFormat(PixelFormat.TRANSLUCENT);
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.activity_camera);
mSurfaceView = (SurfaceView) findViewById(R.id.surface_camera);
mSurfaceHolder = mSurfaceView.getHolder();
mSurfaceHolder.addCallback(this);
mSurfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
}
@Override
public void surfaceChanged(SurfaceHolder arg0, int arg1, int arg2, int arg3) {
// TODO Auto-generated method stub
if (mPreviewRunning) {
mCamera.stopPreview();
}
Camera.Parameters p = mCamera.getParameters();
//p.setPreviewSize(w, h);
mCamera.setParameters(p);
try {
mCamera.setPreviewDisplay(arg0);
} catch (IOException e) {
e.printStackTrace();
}
mCamera.startPreview();
mPreviewRunning = true;
}
@Override
public void surfaceCreated(SurfaceHolder holder) {
// TODO Auto-generated method stub
mCamera = Camera.open();
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
// TODO Auto-generated method stub
mCamera.stopPreview();
mPreviewRunning = false;
mCamera.release();
}
Camera.PictureCallback mPictureCallback = new Camera.PictureCallback() {
public void onPictureTaken(byte[] imageData, Camera c) {
}
};
}
这里有什么问题？提前致谢..
我也在manifest.xml
声明权限
<uses-permission android:name="android.permission.CAMERA" />
<uses-feature android:name="android.hardware.Camera" />
<uses-feature android:name="android.hardware." />
在 marshmellow 中，OS 权限应该在 运行 时间获得。相机权限也必须在 运行 时间获得请检查下面的 link 以了解如何在 运行 时间请求权限。
https://developer.android.com/training/permissions/requesting.html
快速解决方案：
这是一个修复程序，但您可以使用当前的 marshmellow 版本
尝试将此添加到您的 build.gradle 文件
targetSdkVersion 22
在 Marshmallow 上，您必须在 运行 时向用户请求授权许可，类似这样
int permissionCheck = ContextCompat.checkSelfPermission(thisActivity,
Manifest.permission.WRITE_CALENDAR);
if(permissionCheck == PackageManager.PERMISSION_GRANTED){
//user granted you
}else{
//the user denied your permission
}
您需要以编程方式授予 android.hardware.Camera 权限。
MANIFEST PERMISSIONS WON'T WORK on Android 6
With marshmallow(newest version of Android). We have got some
restrictions in Using Sensitive permissions like :
Storage,Contacts access, etc..In edition to give these permissions in
manifest, We need to request them from users at Runtime.
有关详细信息，请参阅：Android M permissions
在您的 activity 中添加此代码：
@Override
protected void onStart() {
super.onStart();
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
int hasCameraPermission = checkSelfPermission(Manifest.permission.CAMERA);
List<String> permissions = new ArrayList<String>();
if (hasCameraPermission != PackageManager.PERMISSION_GRANTED) {
permissions.add(Manifest.permission.CAMERA);
}
if (!permissions.isEmpty()) {
requestPermissions(permissions.toArray(new String[permissions.size()]), 111);
}
}
}
在 onActivityResult 之后添加：
@Override
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
switch (requestCode) {
case 111: {
for (int i = 0; i < permissions.length; i++) {
if (grantResults[i] == PackageManager.PERMISSION_GRANTED) {
System.out.println("Permissions --> " + "Permission Granted: " + permissions[i]);
} else if (grantResults[i] == PackageManager.PERMISSION_DENIED) {
System.out.println("Permissions --> " + "Permission Denied: " + permissions[i]);
}
}
}
break;
default: {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
}
}
}
我正在尝试构建一个相机应用程序（我对此很陌生） 当我 运行 真实设备上的应用程序时，它给了我这个错误：
05-26 13:16:37.504 14076-14076/involved.pose9 E/AndroidRuntime: FATAL EXCEPTION: main
Process: involved.pose9, PID: 14076
java.lang.RuntimeException: Fail to connect to camera service
at android.hardware.Camera.<init>(Camera.java:511)
at android.hardware.Camera.open(Camera.java:368)
at involved.pose9.CameraActivity.surfaceCreated(CameraActivity.java:63)
at android.view.SurfaceView.updateWindow(SurfaceView.java:582)
at android.view.SurfaceView.onPreDraw(SurfaceView.java:177)
at android.view.ViewTreeObserver.dispatchOnPreDraw(ViewTreeObserver.java:944)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2067)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1119)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6060)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:858)
at android.view.Choreographer.doCallbacks(Choreographer.java:670)
at android.view.Choreographer.doFrame(Choreographer.java:606)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:844)
at android.os.Handler.handleCallback(Handler.java:746)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5443)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:728)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
这是我的Class
import android.graphics.PixelFormat;
import android.hardware.Camera;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.Window;
import android.view.WindowManager;
import java.io.IOException;
public class CameraActivity extends AppCompatActivity implements SurfaceHolder.Callback {
SurfaceHolder mSurfaceHolder;
SurfaceView mSurfaceView;
public Camera mCamera;
boolean mPreviewRunning;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getWindow().setFormat(PixelFormat.TRANSLUCENT);
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.activity_camera);
mSurfaceView = (SurfaceView) findViewById(R.id.surface_camera);
mSurfaceHolder = mSurfaceView.getHolder();
mSurfaceHolder.addCallback(this);
mSurfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
}
@Override
public void surfaceChanged(SurfaceHolder arg0, int arg1, int arg2, int arg3) {
// TODO Auto-generated method stub
if (mPreviewRunning) {
mCamera.stopPreview();
}
Camera.Parameters p = mCamera.getParameters();
//p.setPreviewSize(w, h);
mCamera.setParameters(p);
try {
mCamera.setPreviewDisplay(arg0);
} catch (IOException e) {
e.printStackTrace();
}
mCamera.startPreview();
mPreviewRunning = true;
}
@Override
public void surfaceCreated(SurfaceHolder holder) {
// TODO Auto-generated method stub
mCamera = Camera.open();
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
// TODO Auto-generated method stub
mCamera.stopPreview();
mPreviewRunning = false;
mCamera.release();
}
Camera.PictureCallback mPictureCallback = new Camera.PictureCallback() {
public void onPictureTaken(byte[] imageData, Camera c) {
}
};
}
这里有什么问题？提前致谢..
我也在manifest.xml
声明权限 <uses-permission android:name="android.permission.CAMERA" />
<uses-feature android:name="android.hardware.Camera" />
<uses-feature android:name="android.hardware." />
在 marshmellow 中，OS 权限应该在 运行 时间获得。相机权限也必须在 运行 时间获得请检查下面的 link 以了解如何在 运行 时间请求权限。 https://developer.android.com/training/permissions/requesting.html
快速解决方案： 这是一个修复程序，但您可以使用当前的 marshmellow 版本 尝试将此添加到您的 build.gradle 文件
targetSdkVersion 22
在 Marshmallow 上，您必须在 运行 时向用户请求授权许可，类似这样
int permissionCheck = ContextCompat.checkSelfPermission(thisActivity,
Manifest.permission.WRITE_CALENDAR);
if(permissionCheck == PackageManager.PERMISSION_GRANTED){
//user granted you
}else{
//the user denied your permission
}
您需要以编程方式授予 android.hardware.Camera 权限。
MANIFEST PERMISSIONS WON'T WORK on Android 6
With marshmallow(newest version of Android). We have got some restrictions in Using Sensitive permissions like : Storage,Contacts access, etc..In edition to give these permissions in manifest, We need to request them from users at Runtime.
有关详细信息，请参阅：Android M permissions
在您的 activity 中添加此代码：
@Override
protected void onStart() {
super.onStart();
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
int hasCameraPermission = checkSelfPermission(Manifest.permission.CAMERA);
List<String> permissions = new ArrayList<String>();
if (hasCameraPermission != PackageManager.PERMISSION_GRANTED) {
permissions.add(Manifest.permission.CAMERA);
}
if (!permissions.isEmpty()) {
requestPermissions(permissions.toArray(new String[permissions.size()]), 111);
}
}
}
在 onActivityResult 之后添加：
@Override
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
switch (requestCode) {
case 111: {
for (int i = 0; i < permissions.length; i++) {
if (grantResults[i] == PackageManager.PERMISSION_GRANTED) {
System.out.println("Permissions --> " + "Permission Granted: " + permissions[i]);
} else if (grantResults[i] == PackageManager.PERMISSION_DENIED) {
System.out.println("Permissions --> " + "Permission Denied: " + permissions[i]);
}
}
}
break;
default: {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
}
}
}