Android Camera 分析 1

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广播接收器方式启动Camera

    <application android:icon="@mipmap/ic_launcher_camera"            android:name="com.android.camera.CameraAppImpl"            android:label="@string/camera_label"            android:theme="@style/ThemeCamera"            android:hardwareAccelerated="true">        ...        <receiver android:name="com.android.camera.CameraButtonIntentReceiver">            <intent-filter>                <action android:name="android.intent.action.CAMERA_BUTTON"/>            </intent-filter>        </receiver>        ...    </application>public class CameraButtonIntentReceiver extends BroadcastReceiver {        @Override    public void onReceive(Context context, Intent intent) {    ...    }}

CameraHolder类中使用单例模式

public class CameraHolder {        // Use a singleton.    private static CameraHolder sHolder;        public static synchronized CameraHolder instance() {        if (sHolder == null) {            sHolder = new CameraHolder();        }        return sHolder;    }

使用SharedPreferences保存Camera的一些信息

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