app/src/main/AndroidManifest.xml

@@ -17,6 +17,7 @@

                         </activity>
              

                         <activity
              

                             android:name="com.ptplib.usbcamera.test.MyTestActivity"
              

                +            android:launchMode="singleTask"
              

                             android:screenOrientation="portrait">
              

                             <intent-filter>
              

                                 <action android:name="android.intent.action.MAIN" />
              

app/src/main/java/com/ptplib/usbcamera/test/MyTestActivity.java

@@ -70,19 +70,24 @@ public class MyTestActivity extends Activity {

                     }
              

                 
              

                     @Override
              

                -    protected void onResume() {
              

                -        super.onResume();
              

                +    protected void onStart() {
              

                +        super.onStart();
              

                         registerUSBReceiver();
              

                         initDevice (searchDevice ());
              

                     }
              

                 
              

                     @Override
              

                -    protected void onPause() {
              

                -        super.onPause();
              

                +    protected void onStop() {
              

                +        super.onStop();
              

                         unregisterReceiver(mUsbReceiver);
              

                         detachDevice();
              

                     }
              

                 
              

                +    @Override
              

                +    protected void onNewIntent(Intent intent) {
              

                +        super.onNewIntent(intent);
              

                +    }
              

                +
              

                     BroadcastReceiver mUsbReceiver = new BroadcastReceiver() {
              

                         public void onReceive(Context context, Intent intent) {
              

                             String action = intent.getAction();