问题描述
我使用Webview加载随机网站。为了获得良好的导航效果，我需要打开由D-pad控制的鼠标光标，但是我没有找到有关操作方法的信息，也许有人可以开发出这种导航功能，感谢您的帮助。 / p>
解决方法
使用指针捕获
只有当包含视图的视图层次结构具有焦点时，它才能请求捕获指针。因此，在视图上有特定的用户操作时，例如在onClick()事件期间或活动的onWindowFocusChanged()事件处理程序中，您应该请求捕获指针。
要请求捕获指针，请在视图上调用requestPointerCapture()方法。下面的代码示例演示如何在用户单击视图时请求捕获指针：
通过创建自定义指针布局在 android tv webview 中启用光标指针
Optiplex@jetta:~/Desktop/PROGRAM/CP$ ./b.out
1 2 3 4 5 6 7 8 9
然后将 webview 放在 XML 中的自定义光标布局中
public class CursorLayout extends FrameLayout {
public static final int CURSOR_DISAPPEAR_TIMEOUT = 5000;
public static int CURSOR_RADIUS = 0;
public static float CURSOR_STROKE_WIDTH = 0.0f;
public static float MAX_CURSOR_SPEED = 0.0f;
public static int SCROLL_START_PADDING = 100;
public static final int UNCHANGED = -100;
public int EFFECT_DIAMETER;
public int EFFECT_RADIUS;
private Callback callback;
/* access modifiers changed from: private */
public Point cursorDirection = new Point(0,0);
/* access modifiers changed from: private */
public Runnable cursorHideRunnable = new Runnable() {
public void run() {
CursorLayout.this.invalidate();
}
};
/* access modifiers changed from: private */
public PointF cursorPosition = new PointF(0.0f,0.0f);
/* access modifiers changed from: private */
public PointF cursorSpeed = new PointF(0.0f,0.0f);
private Runnable cursorUpdateRunnable = new Runnable() {
public void run() {
if (CursorLayout.this.getHandler() != null) {
CursorLayout.this.getHandler().removeCallbacks(CursorLayout.this.cursorHideRunnable);
}
long currentTimeMillis = System.currentTimeMillis();
long access$100 = currentTimeMillis - CursorLayout.this.lastCursorUpdate;
CursorLayout.this.lastCursorUpdate = currentTimeMillis;
float f = ((float) access$100) * 0.05f;
PointF access$200 = CursorLayout.this.cursorSpeed;
CursorLayout cursorLayout = CursorLayout.this;
float f2 = cursorLayout.cursorSpeed.x;
CursorLayout cursorLayout2 = CursorLayout.this;
float access$400 = cursorLayout.bound(f2 + (cursorLayout2.bound((float) cursorLayout2.cursorDirection.x,1.0f) * f),CursorLayout.MAX_CURSOR_SPEED);
CursorLayout cursorLayout3 = CursorLayout.this;
float f3 = cursorLayout3.cursorSpeed.y;
CursorLayout cursorLayout4 = CursorLayout.this;
access$200.set(access$400,cursorLayout3.bound(f3 + (cursorLayout4.bound((float) cursorLayout4.cursorDirection.y,CursorLayout.MAX_CURSOR_SPEED));
if (Math.abs(CursorLayout.this.cursorSpeed.x) < 0.1f) {
CursorLayout.this.cursorSpeed.x = 0.0f;
}
if (Math.abs(CursorLayout.this.cursorSpeed.y) < 0.1f) {
CursorLayout.this.cursorSpeed.y = 0.0f;
}
if (CursorLayout.this.cursorDirection.x == 0 && CursorLayout.this.cursorDirection.y == 0 && CursorLayout.this.cursorSpeed.x == 0.0f && CursorLayout.this.cursorSpeed.y == 0.0f) {
if (CursorLayout.this.getHandler() != null) {
CursorLayout.this.getHandler().postDelayed(CursorLayout.this.cursorHideRunnable,5000);
}
return;
}
CursorLayout.this.tmpPointF.set(CursorLayout.this.cursorPosition);
CursorLayout.this.cursorPosition.offset(CursorLayout.this.cursorSpeed.x,CursorLayout.this.cursorSpeed.y);
Log.d("cursor1234_xxxx",String.valueOf(CursorLayout.this.cursorPosition.x));
Log.d("cursor1234_yyyy",String.valueOf(CursorLayout.this.cursorPosition.y));
if (CursorLayout.this.cursorPosition.x < 0.0f) {
CursorLayout.this.cursorPosition.x = 0.0f;
} else if (CursorLayout.this.cursorPosition.x > ((float) (CursorLayout.this.getWidth() - 1))) {
CursorLayout.this.cursorPosition.x = (float) (CursorLayout.this.getWidth() - 1);
}
if (CursorLayout.this.cursorPosition.y < 0.0f) {
CursorLayout.this.cursorPosition.y = 0.0f;
} else if (CursorLayout.this.cursorPosition.y > ((float) (CursorLayout.this.getHeight() - 1))) {
CursorLayout.this.cursorPosition.y = (float) (CursorLayout.this.getHeight() - 1);
}
if (!CursorLayout.this.tmpPointF.equals(CursorLayout.this.cursorPosition) && CursorLayout.this.dpadCenterPressed) {
CursorLayout cursorLayout5 = CursorLayout.this;
cursorLayout5.dispatchMotionEvent(cursorLayout5.cursorPosition.x,CursorLayout.this.cursorPosition.y,2);
}
View childAt = CursorLayout.this.getChildAt(0);
if (childAt != null) {
if (CursorLayout.this.cursorPosition.y > ((float) (CursorLayout.this.getHeight() - CursorLayout.SCROLL_START_PADDING))) {
if (CursorLayout.this.cursorSpeed.y > 0.0f && childAt.canScrollVertically((int) CursorLayout.this.cursorSpeed.y)) {
childAt.scrollTo(childAt.getScrollX(),childAt.getScrollY() + ((int) CursorLayout.this.cursorSpeed.y));
}
} else if (CursorLayout.this.cursorPosition.y < ((float) CursorLayout.SCROLL_START_PADDING) && CursorLayout.this.cursorSpeed.y < 0.0f && childAt.canScrollVertically((int) CursorLayout.this.cursorSpeed.y)) {
childAt.scrollTo(childAt.getScrollX(),childAt.getScrollY() + ((int) CursorLayout.this.cursorSpeed.y));
}
if (CursorLayout.this.cursorPosition.x > ((float) (CursorLayout.this.getWidth() - CursorLayout.SCROLL_START_PADDING))) {
if (CursorLayout.this.cursorSpeed.x > 0.0f && childAt.canScrollHorizontally((int) CursorLayout.this.cursorSpeed.x)) {
childAt.scrollTo(childAt.getScrollX() + ((int) CursorLayout.this.cursorSpeed.x),childAt.getScrollY());
}
} else if (CursorLayout.this.cursorPosition.x < ((float) CursorLayout.SCROLL_START_PADDING) && CursorLayout.this.cursorSpeed.x < 0.0f && childAt.canScrollHorizontally((int) CursorLayout.this.cursorSpeed.x)) {
childAt.scrollTo(childAt.getScrollX() + ((int) CursorLayout.this.cursorSpeed.x),childAt.getScrollY());
}
}
CursorLayout.this.invalidate();
if (CursorLayout.this.getHandler() != null) {
CursorLayout.this.getHandler().post(this);
}
}
};
/* access modifiers changed from: private */
public boolean dpadCenterPressed = false;
/* access modifiers changed from: private */
public long lastCursorUpdate = System.currentTimeMillis();
private Paint paint = new Paint();
PointF tmpPointF = new PointF();
public interface Callback {
void onUserInteraction();
}
/* access modifiers changed from: private */
public float bound(float f,float f2) {
if (f > f2) {
return f2;
}
float f3 = -f2;
return f < f3 ? f3 : f;
}
public CursorLayout(Context context) {
super(context);
init();
}
public CursorLayout(Context context,AttributeSet attributeSet) {
super(context,attributeSet);
init();
}
private void init() {
if (!isInEditMode()) {
this.paint.setAntiAlias(true);
setWillNotDraw(false);
Display defaultDisplay = ((WindowManager) getContext().getSystemService(getContext().WINDOW_SERVICE)).getDefaultDisplay();
Point point = new Point();
defaultDisplay.getSize(point);
this.EFFECT_RADIUS = point.x / 20;
this.EFFECT_DIAMETER = this.EFFECT_RADIUS * 2;
CURSOR_STROKE_WIDTH = (float) (point.x / 400);
CURSOR_RADIUS = point.x / 110;
MAX_CURSOR_SPEED = (float) (point.x / 25);
SCROLL_START_PADDING = point.x / 15;
}
}
public void setCallback(Callback callback2) {
this.callback = callback2;
}
public boolean onInterceptTouchEvent(MotionEvent motionEvent) {
Callback callback2 = this.callback;
if (callback2 != null) {
callback2.onUserInteraction();
}
return super.onInterceptTouchEvent(motionEvent);
}
/* access modifiers changed from: protected */
public void onSizeChanged(int i,int i2,int i3,int i4) {
super.onSizeChanged(i,i2,i3,i4);
UtilMethods.LogMethod("cursorView123_","onSizeChanged");
if (!isInEditMode()) {
this.cursorPosition.set(((float) i) / 2.0f,((float) i2) / 2.0f);
if (getHandler() != null) {
getHandler().postDelayed(this.cursorHideRunnable,5000);
}
}
}
public boolean dispatchKeyEvent(KeyEvent keyEvent) {
UtilMethods.LogMethod("cursorView123_","dispatchKeyEvent");
Callback callback2 = this.callback;
if (callback2 != null) {
callback2.onUserInteraction();
}
int keyCode = keyEvent.getKeyCode();
if (!(keyCode == 66 || keyCode == 160)) {
switch (keyCode) {
case 19:
if (keyEvent.getAction() == 0) {
if (this.cursorPosition.y <= 0.0f) {
return super.dispatchKeyEvent(keyEvent);
}
handleDirectionKeyEvent(keyEvent,-100,-1,true);
} else if (keyEvent.getAction() == 1) {
handleDirectionKeyEvent(keyEvent,false);
}
return true;
case 20:
if (keyEvent.getAction() == 0) {
if (this.cursorPosition.y >= ((float) getHeight())) {
return super.dispatchKeyEvent(keyEvent);
}
handleDirectionKeyEvent(keyEvent,1,false);
}
return true;
case 21:
if (keyEvent.getAction() == 0) {
if (this.cursorPosition.x <= 0.0f) {
return super.dispatchKeyEvent(keyEvent);
}
handleDirectionKeyEvent(keyEvent,false);
}
return true;
case 22:
if (keyEvent.getAction() == 0) {
if (this.cursorPosition.x >= ((float) getWidth())) {
return super.dispatchKeyEvent(keyEvent);
}
handleDirectionKeyEvent(keyEvent,false);
}
return true;
case 23:
break;
default:
switch (keyCode) {
case 268:
if (keyEvent.getAction() == 0) {
handleDirectionKeyEvent(keyEvent,true);
} else if (keyEvent.getAction() == 1) {
handleDirectionKeyEvent(keyEvent,false);
}
return true;
case 269:
if (keyEvent.getAction() == 0) {
handleDirectionKeyEvent(keyEvent,false);
}
return true;
case 270:
if (keyEvent.getAction() == 0) {
handleDirectionKeyEvent(keyEvent,false);
}
return true;
case 271:
if (keyEvent.getAction() == 0) {
handleDirectionKeyEvent(keyEvent,false);
}
return true;
}
}
}
if (!isCursorDissappear()) {
if (keyEvent.getAction() == 0 && !getKeyDispatcherState().isTracking(keyEvent)) {
getKeyDispatcherState().startTracking(keyEvent,this);
this.dpadCenterPressed = true;
dispatchMotionEvent(this.cursorPosition.x,this.cursorPosition.y,0);
} else if (keyEvent.getAction() == 1) {
getKeyDispatcherState().handleUpEvent(keyEvent);
dispatchMotionEvent(this.cursorPosition.x,1);
this.dpadCenterPressed = false;
}
return true;
}
return super.dispatchKeyEvent(keyEvent);
}
/* access modifiers changed from: private */
public void dispatchMotionEvent(float f,float f2,int i) {
UtilMethods.LogMethod("cursorView123_","dispatchMotionEvent");
long uptimeMillis = SystemClock.uptimeMillis();
long uptimeMillis2 = SystemClock.uptimeMillis();
PointerProperties pointerProperties = new PointerProperties();
pointerProperties.id = 0;
pointerProperties.toolType = 1;
PointerProperties[] pointerPropertiesArr = {pointerProperties};
PointerCoords pointerCoords = new PointerCoords();
pointerCoords.x = f;
pointerCoords.y = f2;
pointerCoords.pressure = 1.0f;
pointerCoords.size = 1.0f;
dispatchTouchEvent(MotionEvent.obtain(uptimeMillis,uptimeMillis2,i,pointerPropertiesArr,new PointerCoords[]{pointerCoords},1.0f,0));
}
private void handleDirectionKeyEvent(KeyEvent keyEvent,int i,boolean z) {
this.lastCursorUpdate = System.currentTimeMillis();
if (!z) {
getKeyDispatcherState().handleUpEvent(keyEvent);
this.cursorSpeed.set(0.0f,0.0f);
} else if (!getKeyDispatcherState().isTracking(keyEvent)) {
Handler handler = getHandler();
handler.removeCallbacks(this.cursorUpdateRunnable);
handler.post(this.cursorUpdateRunnable);
getKeyDispatcherState().startTracking(keyEvent,this);
} else {
return;
}
Point point = this.cursorDirection;
if (i == -100) {
i = point.x;
}
if (i2 == -100) {
i2 = this.cursorDirection.y;
}
point.set(i,i2);
}
/* access modifiers changed from: protected */
public void dispatchDraw(Canvas canvas) {
super.dispatchDraw(canvas);
UtilMethods.LogMethod("cursorView123_","dispatchDraw");
if (!isInEditMode() && !isCursorDissappear()) {
float f = this.cursorPosition.x;
float f2 = this.cursorPosition.y;
this.paint.setColor(Color.argb(128,255,255));
this.paint.setStyle(Style.FILL);
canvas.drawCircle(f,f2,(float) CURSOR_RADIUS,this.paint);
this.paint.setColor(-7829368);
this.paint.setStrokeWidth(CURSOR_STROKE_WIDTH);
this.paint.setStyle(Style.STROKE);
canvas.drawCircle(f,this.paint);
}
}
private boolean isCursorDissappear() {
return System.currentTimeMillis() - this.lastCursorUpdate > 5000;
}
/* access modifiers changed from: protected */
public void onDraw(Canvas canvas) {
super.onDraw(canvas);
}}