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安卓相机服务连接失败

android
11

当用户点击相机时，几秒钟后它会打开下一个屏幕，然后抛出无法连接到相机服务的错误信息。

并显示 无法连接相机。

这是我的代码：

   public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    View viewLoad = LayoutInflater.from(CameraActivity.this).inflate(R.layout.camera, null);
    setContentView(viewLoad);

    Bundle bundle = this.getIntent().getExtras();
    seletctedRetailer = bundle.getString("RetailerName");
    retailerCode = bundle.getString("RetailerCode");

    Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE); 
    Bundle b = new Bundle();
    b.putString("Activity", "RetailerOrderSActivity");
    b.putString("RetailerName", seletctedRetailer);
    b.putString("RetailerCode", retailerCode);

    cameraIntent.putExtras(b);
    getParent().getParent().setTitle("Image Capture");
    startActivityForResult(cameraIntent,CAMERA_PIC_REQUEST);  

    vale +=1;

    Button imgMCancel =(Button)findViewById(R.id.imgMCancel);
    imgMCancel.setOnClickListener(new OnClickListener() {
        public void onClick(View v) {
            Intent i = new Intent(getBaseContext(), CameraMainActivity.class);
            Bundle bundle = new Bundle(); 
            bundle.putString("Activity", "CameraMainActivity");
            bundle.putString("RetailerName", seletctedRetailer);
            bundle.putString("RetailerCode", retailerCode);
            i.putExtras(bundle);
            View vi = SalesActivityGroup.group.getLocalActivityManager().startActivity("CameraMainActivity", i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP)).getDecorView();
            SalesActivityGroup.group.replaceView(vi);
        }
    });
}

protected void onActivityResult(int requestCode, int resultCode, Intent data) {  
    super.onActivityResult(requestCode, resultCode, data);
        if (resultCode == CAMERA_PIC_REQUEST) {
            System.out.println("====YES======");
             Bitmap thumbnail = (Bitmap) data.getExtras().get("data");  
                ImageView image = (ImageView) findViewById(R.id.imageView1);  
                image.setImageBitmap(thumbnail);  
        }
}
这是我的布局：
      <?xml version="1.0" encoding="utf-8"?>


    <LinearLayout android:id="@+id/header"
                android:layout_height="wrap_content"
                android:layout_marginBottom="10dp"
                android:layout_marginTop="75dp"
                android:layout_width="fill_parent">


        <Button android:layout_width="wrap_content" 
                android:text="Cancel" 
                android:textColor="#FFFFFF"
                android:background="@drawable/btn_red"
                android:layout_height="wrap_content" 
                android:layout_marginLeft="5dp"
                android:layout_marginRight="150dp"
                android:id="@+id/imgMCancel" 
                >
       </Button>

       <Button android:layout_width="wrap_content"
                android:layout_height="wrap_content" 
                android:id="@+id/buttonClick"
                android:text="Make Photo" 
                android:textColor="#FFFFFF"
                android:background="@drawable/btn_red"
                android:layout_gravity="center">
        </Button>


    </LinearLayout>

这是我的 AndroidManifest.xml 文件

     <activity android:name=".sales.CameraActivity"              android:screenOrientation="landscape"  android:configChanges="orientation|keyboardHidden"  android:clearTaskOnLaunch="false">
        <intent-filter>
            <action android:name="android.media.action.IMAGE_CAPTURE" />
            <category android:name="android.intent.category.DEFAULT" />
      </intent-filter>
  </activity>

根据这个链接的内容，我这样做了。

请帮我解决一个问题。我的应用程序包含Tab ActivityGroup。

提前感谢您的帮助。

我最终只是重新启动了设备，之后一切都正常了。 - jwBurnside
3个回答
21

你在清单文件中漏掉了一些内容，可以查看Camera Class。

请在你的清单文件中添加以下内容：

 <uses-permission android:name="android.permission.CAMERA" />
 <uses-feature android:name="android.hardware.camera" />
 <uses-feature android:name="android.hardware.camera.autofocus" />
希望这能帮到你！
4
请在你的问题中加入以下信息！你的清单文件中缺少权限！ - sandkasten
6
以下是我的应用程序代码 -- 希望能帮到你：
public class CameraActivity extends Activity {
    ImageView img_logo;
    public static Bitmap bitmap;
    public static  String selectedImagePath="";
    protected boolean _taken;   
    protected static final String PHOTO_TAKEN   = "photo_taken";
    int count = 0;
    static String image1 = "";
    /*static String _path="";
    Bitmap bita;
    ParsingForCabDetails obj_ParsingForCabDetails;
    InputStream is;
    protected boolean _taken;   
    protected static final String PHOTO_TAKEN = "photo_taken";*/
    ProgressDialog pd;
    //ImageView iv;
    Button cancel,Ok;
    String alert="";
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.camera);

        img_logo = (ImageView) findViewById(R.id.camera_image);
        cancel = (Button) findViewById(R.id.camera_taken);
        upload = (Button) findViewById(R.id.camerabtnupload);

        if(image1.length()<= 0)
        startCameraActivity();

        upload.setOnClickListener(new OnClickListener() {

            public void onClick(View v) {
                finish();
                if(image1.length() > 0){
                pd = ProgressDialog.show(SmallyTaxiTabbar.tabContext, "", "Loading....");
                new Thread(new Runnable() {

                        public void run() {

                            LoardServer();
                            handler.sendEmptyMessage(0);

                        }
                    }).start();

            }
                else
                    Toast.makeText(getApplicationContext(),"No Capture Image",2000).show();
            }


        });
        img_logo.setOnClickListener(new OnClickListener() {

            public void onClick(View v) {
                // TODO Auto-generated method stub
                startCameraActivity();  
            }
        });

        cancel.setOnClickListener(new OnClickListener() {

            public void onClick(View v) {
                finish();
                selectedImagePath= "";
                image1="";
                }
        });


    }


    public void LoardServer() {
    // this is use for upload image or save image   

    }


    private Handler handler = new Handler(){
        public void handleMessage(android.os.Message msg) {
            pd.dismiss();
            finish();
            if(alert.length() >0 ){
                Log.d("hello","alert"+alert);
                Toast.makeText(getApplicationContext(),alert, 2000).show();
            }
            else
                FindCabDetails.iv_camera.setImageBitmap(bitmap);

            selectedImagePath= "";
            image1="";

        };
    };
    protected void startCameraActivity() {
        selectedImagePath = Environment.getExternalStorageDirectory() + "/default"+count+".jpg";
        count++;
        File file = new File(selectedImagePath);
        Uri outputFileUri = Uri.fromFile(file);
        Intent intent = new Intent (android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
        intent.putExtra(MediaStore.EXTRA_OUTPUT, outputFileUri);
        startActivityForResult(intent, 0);
        }
        @Override
        protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        switch (resultCode) {
        case -1:
        onPhotoTaken();
        break;
        }
        }
        protected void onPhotoTaken() {
        _taken = true;
        bitmap = BitmapFactory.decodeFile(selectedImagePath);
        bitmap = decodeFile();
        image1 = selectedImagePath;
        img_logo.setImageBitmap(bitmap);

        }
        @Override
        protected void onRestoreInstanceState(Bundle savedInstanceState) {
        if (savedInstanceState.getBoolean(PHOTO_TAKEN)) {
        onPhotoTaken();
        }
        }
        @Override
        protected void onSaveInstanceState(Bundle outState) {
        outState.putBoolean(PHOTO_TAKEN, _taken);
        }
        private Bitmap decodeFile() {
        try {
        // decode image size
        BitmapFactory.Options o = new BitmapFactory.Options();
        o.inJustDecodeBounds = true;
        BitmapFactory.decodeStream(new FileInputStream( selectedImagePath), null, o);
        final int REQUIRED_SIZE = 70;
        int width_tmp = o.outWidth, height_tmp = o.outHeight;
        int scale = 1;
        while (true) {
        if (width_tmp / 2 < REQUIRED_SIZE
        || height_tmp / 2 < REQUIRED_SIZE)
        break;
        width_tmp /= 2;
        height_tmp /= 2;
        scale++;
        }
        // decode with inSampleSize
        BitmapFactory.Options o2 = new BitmapFactory.Options();
        o2.inSampleSize = scale;
        return BitmapFactory.decodeStream(new FileInputStream(selectedImagePath), null, o2);
        } catch (FileNotFoundException e) {
        }
        return null;
        }
        public boolean onKeyDown(int keyCode, KeyEvent event) {
            if(keyCode==KeyEvent.KEYCODE_BACK)
            {
                finish();
            }
            return super.onKeyDown(keyCode, event);
        }

}

请使用这个camera.xml文件。
 <?xml version="1.0" encoding="utf-8"?>
    <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:orientation="vertical" android:background="#FFFFFF" android:layout_height="fill_parent" android:layout_width="fill_parent">
        <RelativeLayout android:id="@+id/relativeLayout1"
            android:layout_width="fill_parent"
            android:background="@drawable/bottoombg" android:layout_height="wrap_content">
            <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerVertical="true"
                android:layout_centerHorizontal="true" android:textColor="#FBB917"
                android:textStyle="bold" android:textSize="20dip" android:id="@+id/txtCabNametitle" android:text="Camera"></TextView>
            <Button android:layout_alignParentRight="true" android:layout_centerVertical="true"
                android:background="@drawable/filter_btn1"
                android:layout_marginRight="5dip"
                android:layout_height="30dip" android:textColor="#FFFFFF" android:text="Upload" android:layout_width="70dip" android:id="@+id/camerabtnupload"></Button>
            <Button android:layout_centerVertical="true" android:background="@drawable/btn_press_effect" android:layout_height="30dip" android:textColor="#FFFFFF" android:paddingLeft="10dip" android:id="@+id/camera_taken" android:text="Cancel" android:layout_width="70dip"></Button>
        </RelativeLayout>
        <ImageView android:id="@+id/camera_image" android:layout_centerVertical="true" android:layout_centerHorizontal="true" android:layout_height="200dip" android:layout_width="200dip"></ImageView>
    </RelativeLayout>

AndroidManifest.xml

 <uses-permission android:name="android.permission.CAMERA" />
 <uses-feature android:name="android.hardware.camera" />
 <uses-feature android:name="android.hardware.camera.autofocus" />
6

在获取预览显示之前，您必须解锁相机，并在关闭应用程序之前正确锁定相机。如果相机没有正确锁定，下次打开应用程序时可能会抛出异常。因此，您必须重新启动设备...

我不理解 "#locked properly#" 是什么意思。 - Hugo
mCamera = Camera.open(); mCamera.unlock(); 最后 mCamera.lock(); - Suvam Roy
自从API级别14以后，相机在start()方法中自动锁定给应用程序使用。 - Hugo
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