应用程序不接收广播的被打开相机 [英] Application is not receiving broadcast for camera being opened

问题描述

我想收到广播的被打开相机。我想如果某些条件为真阻止这一进程。

我没有得到被打开相机播出。 （我可以播出拍摄，这是不是我想要的新照片。）

这是我的一块manifest文件：

 ＆lt;接收
            机器人：名字=。HardwareActionListener
            机器人：启用=真
            机器人：出口=真正的＆GT;
            ＆LT;意向过滤器的android：优先=1000＆GT;
                ＆lt;作用机器人：名字=android.intent.action.CAMERA_BUTTON＆GT;
                ＆LT; /作用＆gt;
            ＆所述; /意图滤光器＆gt;
＆LT; /接收器＆GT;
 

这是我的一块文件HardwareActionListener.java的

 的System.out.println（意图的行动：+ intent.getAction（））;如果（intent.getAction（）。equalsIgnoreCase（
                android.intent.action.CAMERA_BUTTON））{
            的System.out.println（拍照键广播接收并中止）;
            如果（some_condition_true）
                  abortBroadcast（）;
        }
 

我已搜查谷歌和stackverflow为此一整天。而且我想每一个组合。
但我没有得到被打开相机播出。

我使用的三星Galaxy Tab进行测试。这是不是有硬件相机按钮。

而在<一个答案href=\"http://stackoverflow.com/questions/5960663/how-to-listen-android-intent-action-camera-button-broadcast-action-in-android\">this问题说，

  

您不能：意图仅由硬件拍照键生成，
  不是由一个摄像头应用程序中的按钮。

那么，有什么不对，我manifest文件的意图过滤器？或者是它的问题，由于设备没有硬件拍照键？

解决方案

  

我要接收被打开相机广播。

有没有这样的广播。

  

我想如果某些条件为真阻止这一进程。

请使用设备管理员API来控制访问摄像头。

  

这是我的一块manifest文件

您正在收听相机按钮presses，这可能会或可能不会有什么用相机应用程序，也不要在所有设备上存在。

  

但我没有得到的被打开相机播出。

这是因为不存在这样的广播

  

而在这个问题一个答案说，你不能：意图仅由硬件拍照键生成的，而不是由一个摄像头应用程序中的按钮

这答案是正确的。

I want to receive a broadcast for camera being opened. I want to block that process if some condition is true.

I am not getting broadcast for camera being opened. (I can get broadcast for new picture taken, which is not what I want.)

This is a piece of my manifest file:

<receiver
            android:name=".HardwareActionListener"
            android:enabled="true"
            android:exported="true" >
            <intent-filter android:priority="1000" >
                <action android:name="android.intent.action.CAMERA_BUTTON" >
                </action>
            </intent-filter>
</receiver>

This is a piece of my file HardwareActionListener.java

System.out.println("Intent action: " + intent.getAction());

if (intent.getAction().equalsIgnoreCase(
                "android.intent.action.CAMERA_BUTTON")) {
            System.out.println("CAMERA Button broadcast received and aborted");
            if(some_condition_true)
                  abortBroadcast();
        }

I have searched on google and stackverflow for this for a whole day. And I tried each and every combination. But I am not getting broadcast for camera being opened.

I am using Samsung Galaxy tab for testing. Which is not having hardware Camera button.

And one answer in this question says that

You can't: the intent is only generated by the hardware camera button, not by the button within a camera app.

So is there anything wrong in my manifest file's intent filter? Or is it the problem due to device not having hardware camera button?

解决方案

I want to receive a broadcast for camera being opened.

There is no such broadcast.

I want to block that process if some condition is true.

Please use the device admin APIs to control access to the camera.

This is a piece of my manifest file

You are listening for CAMERA button presses, which may or may not have anything to do with a camera app, and do not exist on all devices.

But I am not getting broadcast for camera being opened.

That is because there is no such broadcast.

And one answer in this question says that "You can't: the intent is only generated by the hardware camera button, not by the button within a camera app."

That answer is correct.

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