Update MainActivity.java

jcunhafonte · Feb 19, 2016 · 90605ab · 90605ab
1 parent 7db70d3
commit 90605ab
Showing 1 changed file with 71 additions and 0 deletions.
diff --git a/example3/app/src/net/majorkernelpanic/example3/MainActivity.java b/example3/app/src/net/majorkernelpanic/example3/MainActivity.java
@@ -353,4 +353,75 @@ public void surfaceCreated(SurfaceHolder holder) {
 	public void surfaceDestroyed(SurfaceHolder holder) {
 		mClient.stopStream();
 	}
+
+	@Override
+public boolean onTouchEvent(MotionEvent event) {
+    // Get the pointer ID
+
+    Camera.Parameters params = VideoStream.mCamera.getParameters();
+    int action = event.getAction();
+
+
+    if (event.getPointerCount() > 1) {
+        // handle multi-touch events
+        if (action == MotionEvent.ACTION_POINTER_DOWN) {
+            mDist = getFingerSpacing(event);
+        } else if (action == MotionEvent.ACTION_MOVE && params.isZoomSupported()) {
+            VideoStream.mCamera.cancelAutoFocus();
+            handleZoom(event, params);
+        }
+    } else {
+        // handle single touch events
+        if (action == MotionEvent.ACTION_UP) {
+            handleFocus(event, params);
+        }
+    }
+    return true;
+}
+
+private void handleZoom(MotionEvent event, Camera.Parameters params) {
+    int maxZoom = params.getMaxZoom();
+    int zoom = params.getZoom();
+    float newDist = getFingerSpacing(event);
+    if (newDist > mDist) {
+        //zoom in
+        if (zoom < maxZoom)
+            zoom++;
+    } else if (newDist < mDist) {
+        //zoom out
+        if (zoom > 0)
+            zoom--;
+    }
+    mDist = newDist;
+    params.setZoom(zoom);
+    VideoStream.mCamera.setParameters(params);
+}
+
+public void handleFocus(MotionEvent event, Camera.Parameters params) {
+    int pointerId = event.getPointerId(0);
+    int pointerIndex = event.findPointerIndex(pointerId);
+    // Get the pointer's current position
+    float x = event.getX(pointerIndex);
+    float y = event.getY(pointerIndex);
+
+    List<String> supportedFocusModes = params.getSupportedFocusModes();
+    if (supportedFocusModes != null && supportedFocusModes.contains(Camera.Parameters.FOCUS_MODE_AUTO)) {
+        VideoStream.mCamera.autoFocus(new Camera.AutoFocusCallback() {
+            @Override
+            public void onAutoFocus(boolean b, Camera camera) {
+                // currently set to auto-focus on single touch
+            }
+        });
+    }
+}
+
+/**
+ * Determine the space between the first two fingers
+ */
+private float getFingerSpacing(MotionEvent event) {
+    // ...
+    float x = event.getX(0) - event.getX(1);
+    float y = event.getY(0) - event.getY(1);
+    return FloatMath.sqrt(x * x + y * y);
+}
 }