Input command can fail (with exceptions) if the touchscreen id is not 0
We had a device where the touchscreen was reconfigured during system
init, and as a result was assigned a device id that was not 0.
The following message from InputReader.cpp was logged when this occured:
I/InputReader( 762): Device reconfigured: id=4, name='himax-touchscreen', size 1024x600, orientation 1, mode 1, display id 0
Attempting to use the input command for the touchscreen in this state
will fail due to the hardcoded touchscreen device id.
Change-Id: I4e8fad864e7b83cce00c680b254bad06e1200f15
diff --git a/cmds/input/src/com/android/commands/input/Input.java b/cmds/input/src/com/android/commands/input/Input.java
index 2a7c79b..754d3f5 100644
--- a/cmds/input/src/com/android/commands/input/Input.java
+++ b/cmds/input/src/com/android/commands/input/Input.java
@@ -234,6 +234,18 @@
InputManager.INJECT_INPUT_EVENT_MODE_WAIT_FOR_FINISH);
}
+ private int getInputDeviceId(int inputSource) {
+ final int DEFAULT_DEVICE_ID = 0;
+ int[] devIds = InputDevice.getDeviceIds();
+ for (int devId : devIds) {
+ InputDevice inputDev = InputDevice.getDevice(devId);
+ if (inputDev.supportsSource(inputSource)) {
+ return devId;
+ }
+ }
+ return DEFAULT_DEVICE_ID;
+ }
+
/**
* Builds a MotionEvent and injects it into the event stream.
*
@@ -249,11 +261,10 @@
final int DEFAULT_META_STATE = 0;
final float DEFAULT_PRECISION_X = 1.0f;
final float DEFAULT_PRECISION_Y = 1.0f;
- final int DEFAULT_DEVICE_ID = 0;
final int DEFAULT_EDGE_FLAGS = 0;
MotionEvent event = MotionEvent.obtain(when, when, action, x, y, pressure, DEFAULT_SIZE,
- DEFAULT_META_STATE, DEFAULT_PRECISION_X, DEFAULT_PRECISION_Y, DEFAULT_DEVICE_ID,
- DEFAULT_EDGE_FLAGS);
+ DEFAULT_META_STATE, DEFAULT_PRECISION_X, DEFAULT_PRECISION_Y,
+ getInputDeviceId(inputSource), DEFAULT_EDGE_FLAGS);
event.setSource(inputSource);
Log.i(TAG, "injectMotionEvent: " + event);
InputManager.getInstance().injectInputEvent(event,