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Call Looper.prepareMainLooper() to avoid exception

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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>
This commit is contained in:
olbb 2019-02-19 10:33:59 +08:00 committed by Romain Vimont
parent b08a98324d
commit e282100d0b
1 changed files with 11 additions and 0 deletions
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11
server/src/main/java/com/genymobile/scrcpy/ScreenEncoder.java
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@ -7,6 +7,7 @@ import android.media.MediaCodec;
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 +55,16 @@ public class ScreenEncoder implements Device.RotationListener {
}
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>
//
// Use Looper.prepareMainLooper() instead of Looper.prepare() to avoid a NullPointerException:
// "Attempt to read from field 'android.os.MessageQueue android.os.Looper.mQueue'
// on a null object reference"
// <https://github.com/Genymobile/scrcpy/issues/921>
Looper.prepareMainLooper();
MediaFormat format = createFormat(bitRate, frameRate, iFrameInterval);
device.setRotationListener(this);
boolean alive;