修复弱网情况下，获取不到预览链接的异常

Change-Id: I795706a21c3c79755957dcfd9cf6fde385aafab3

Author: sevenhhe

sdk/video-link-android/src/main/java/com/tencent/iot/video/link/util/audio/AudioRecordUtil.java

@@ -67,7 +67,9 @@ private void reset() {
      */
     public void stop() {
         recorderState = false;
-        audioRecord.stop();
+        if (audioRecord != null) {
+            audioRecord.stop();
+        }
         audioRecord = null;
     }
 

sdkdemo/src/main/java/com/tencent/iot/explorer/link/demo/video/playback/localPlayback/VideoLocalPlaybackFragment.kt

@@ -80,9 +80,11 @@ class VideoLocalPlaybackFragment: VideoPlaybackBaseFragment(), TextureView.Surfa
     @Volatile
     private var isShowing = false
 
-    private fun sendCmd(id: String, cmd: String):String {
+    private fun sendCmd(id: String, cmd: String): String {
         if (connected)
-            return XP2P.postCommandRequestSync(id, cmd.toByteArray(), cmd.toByteArray().size.toLong(), 2 * 1000 * 1000)
+            XP2P.postCommandRequestSync(id, cmd.toByteArray(), cmd.toByteArray().size.toLong(), 2 * 1000 * 1000)?.let {
+                return it
+            }
         return ""
     }
 

sdkdemo/src/main/java/com/tencent/iot/explorer/link/demo/video/preview/VideoPreviewActivity.kt

@@ -165,11 +165,13 @@ class VideoPreviewActivity : VideoBaseActivity(), EventView, TextureView.Surface
             countDownLatchs.put("${App.data.accessInfo!!.productId}/${presenter.getDeviceName()}", tmpCountDownLatch)
             tmpCountDownLatch.await()
 
-            urlPrefix = XP2P.delegateHttpFlv("${App.data.accessInfo!!.productId}/${presenter.getDeviceName()}")
-            if (!TextUtils.isEmpty(urlPrefix)) {
-                player?.let {
-                    resetPlayer()
-                    keepPlayerplay("${App.data.accessInfo!!.productId}/${presenter.getDeviceName()}")
+            XP2P.delegateHttpFlv("${App.data.accessInfo!!.productId}/${presenter.getDeviceName()}")?.let {
+                urlPrefix = it
+                if (!TextUtils.isEmpty(urlPrefix)) {
+                    player?.let {
+                        resetPlayer()
+                        keepPlayerplay("${App.data.accessInfo!!.productId}/${presenter.getDeviceName()}")
+                    }
                 }
             }
         }).start()
@@ -209,8 +211,10 @@ class VideoPreviewActivity : VideoBaseActivity(), EventView, TextureView.Surface
                 tmpCountDownLatch.await()
                 Log.d(tag, "id=${id}, tmpCountDownLatch do not wait any more")
 
-                urlPrefix = XP2P.delegateHttpFlv(id)
-                if (!TextUtils.isEmpty(urlPrefix)) resetPlayer()
+                XP2P.delegateHttpFlv(id)?.let {
+                    urlPrefix = it
+                    if (!TextUtils.isEmpty(urlPrefix)) resetPlayer()
+                }
             }
         }.start()
     }
@@ -235,7 +239,7 @@ class VideoPreviewActivity : VideoBaseActivity(), EventView, TextureView.Surface
             if (able) {
                 var command = Command.getNvrIpcStatus(presenter.getChannel(), 0)
                 var repStatus = XP2P.postCommandRequestSync("${accessInfo.productId}/${presenter.getDeviceName()}",
-                    command.toByteArray(), command.toByteArray().size.toLong(), 2 * 1000 * 1000)
+                    command.toByteArray(), command.toByteArray().size.toLong(), 2 * 1000 * 1000) ?:""
 
                 launch(Dispatchers.Main) {
                     var retContent = StringBuilder(repStatus).toString()
@@ -338,7 +342,7 @@ class VideoPreviewActivity : VideoBaseActivity(), EventView, TextureView.Surface
                 App.data.accessInfo?.let {
                     if (command.length <= 0) return@Runnable
                     var retContent = XP2P.postCommandRequestSync("${it.productId}/${presenter.getDeviceName()}",
-                        command.toByteArray(), command.toByteArray().size.toLong(), 2 * 1000 * 1000)
+                        command.toByteArray(), command.toByteArray().size.toLong(), 2 * 1000 * 1000)?:""
                     launch(Dispatchers.Main) {
                         if (TextUtils.isEmpty(retContent)) {
                             retContent = getString(R.string.command_with_error, command)

sdkdemo/src/main/java/com/tencent/iot/explorer/link/demo/video/utils/TipToastDialog.java

@@ -33,7 +33,7 @@ public TipToastDialog(Context context, String content, long duration) {
     public void initView() {
         handler.postDelayed(() -> {
             if (isShowing()) {
-                super.dismiss();
+                dismiss();
             }
         }, duration);