有许多类似的问题,但没有人帮助我:
我的清单文件是:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.android.cameraapi"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk android:minSdkVersion="10" />
<uses-feature android:name="android.hardware.camera" />
<uses-feature android:name="android.hardware.camera.autofocus" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.CAMERA" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name" >
<activity
android:name=".CameraAPIActivity"
android:label="@string/app_name"
android:screenOrientation="landscape" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
我的Activity类是:
public class CameraAPIActivity extends Activity {
private Camera myCamera = null;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
if (checkCameraHardware(this)) {
try {
myCamera = Camera.open();
} catch (Exception e) {
//Here i get the Exception: Failed to connect to camera service
}
}
}
private boolean checkCameraHardware(Context context) {
if (context.getPackageManager().hasSystemFeature(
PackageManager.FEATURE_CAMERA)) {
// this device has a camera
return true;
} else {
// no camera on this device
return false;
}
}
我在
行获得了例外myCamera = Camera.open();
谢谢
答案 0 :(得分:13)
忘记添加
myCamera.release();
在我的代码中。因此它第一次启动应用程序。当我重新启动它时,相机服务不可用。
答案 1 :(得分:2)
您需要添加以下内容
private Preview mPreview; // Global variable
mPreview = new Preview(this); // onCreate()
setContentView(mPreview); // onCreate()
希望这有帮助!
答案 2 :(得分:0)
您在源文件的顶部导入了错误的相机类(我沉没了),即android.graphics.Camera
。
您需要android.hardware.Camera
。
后:
myCamera = Camera.open(); - start working.
答案 3 :(得分:-5)
如果您想从相机中拍摄照片
Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(cameraIntent, CAMERA_REQUEST);`
还添加此功能
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == CAMERA_REQUEST) {
photo = (Bitmap) data.getExtras().get("data");
imageView.setImageBitmap(photo);
}
}
imageView是您可能想要设置捕获图像的视图。