From 9da4c93582f28352a8f11acbb917d5ce9c07183e Mon Sep 17 00:00:00 2001
From: olbb <olbbme@gmail.com>
Date: Tue, 19 Feb 2019 10:33:59 +0800
Subject: [PATCH] Call Looper.prepareMainLooper() to avoid exception

Some devices internally create a Handler when creating an input Surface,
causing an exception:

> Surface: java.lang.RuntimeException: Can't create handler inside
> thread that has not called Looper.prepare()

As a workaround, call Looper.prepareMainLooper() beforehand.

Fixes:
 - <https://github.com/Genymobile/scrcpy/issues/240>
 - <https://github.com/Genymobile/scrcpy/issues/921>

Signed-off-by: Romain Vimont <rom@rom1v.com>
---
 .../src/main/java/com/genymobile/scrcpy/ScreenEncoder.java  | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/server/src/main/java/com/genymobile/scrcpy/ScreenEncoder.java b/server/src/main/java/com/genymobile/scrcpy/ScreenEncoder.java
index 8357b06150..273422a69d 100644
--- a/server/src/main/java/com/genymobile/scrcpy/ScreenEncoder.java
+++ b/server/src/main/java/com/genymobile/scrcpy/ScreenEncoder.java
@@ -7,6 +7,7 @@
 import android.media.MediaCodecInfo;
 import android.media.MediaFormat;
 import android.os.IBinder;
+import android.os.Looper;
 import android.view.Surface;
 
 import java.io.FileDescriptor;
@@ -54,6 +55,11 @@ public boolean consumeRotationChange() {
     }
 
     public void streamScreen(Device device, FileDescriptor fd) throws IOException {
+        // Some devices internally create a Handler when creating an input Surface, causing an exception:
+        // "Can't create handler inside thread that has not called Looper.prepare()"
+        // <https://github.com/Genymobile/scrcpy/issues/240>
+        Looper.prepareMainLooper();
+
         MediaFormat format = createFormat(bitRate, frameRate, iFrameInterval);
         device.setRotationListener(this);
         boolean alive;