我在onTouchEvent中使用了MainActivity.class。它的工作正常：如果用户用手指制作双L，我会调用一个片段。
我想在其他onTouchEvent中使用此Activity，但如果我复制所有代码，我认为它很脏。
现在我为此创建了一个工具TouchListenerImpl：
class TouchListenerImpl implements View.OnTouchListener {
private boolean movingDownL, movingDownR, movingLeft, movingRight, movingSuccessL, movingSuccessR = false;
private Point oldCoordsL, oldCoordsR, startPointL, startPointR = new Point(0, 0);
private boolean admin_touch = false;
private OnLTouch callback;
void setCallback(OnLTouch c) {
callback = c;
}
interface OnLTouch {
void lTouchSuccess();
}
@Override
public boolean onTouch(View v, MotionEvent event) {
Log.d("debugTouch", "onTouch");
int pIndexL = event.findPointerIndex(event.getPointerId(0));
int pIndexR = 0;
if(event.getPointerCount() > 1) pIndexR = event.findPointerIndex(event.getPointerId(1));
if(event.getPointerCount() > 1 && event.getX(pIndexL) > event.getX(pIndexR)) {
int tmp = pIndexR;
pIndexR = pIndexL;
pIndexL = tmp;
}
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
movingDownL = true;
movingDownR = true;
movingSuccessL = false;
movingSuccessR = false;
if(event.getPointerCount() > 1) {
startPointR = new Point((int) event.getX(pIndexR), (int) event.getY(pIndexR));
oldCoordsR = new Point((int) event.getX(pIndexR), (int) event.getY(pIndexR));
}
startPointL = new Point((int) event.getX(pIndexL), (int) event.getY(pIndexL));
oldCoordsL = new Point((int) event.getX(pIndexL), (int) event.getY(pIndexL));
break;
case MotionEvent.ACTION_MOVE:
int downMinDistance = 300;
int lnrInaccuracy = 10;
int downInaccuracy = 30;
if(event.getPointerCount() > 1) {
if(!movingDownR) {
if(Math.abs(oldCoordsR.x - event.getX(pIndexR)) < downInaccuracy &&
oldCoordsR.y < event.getY(pIndexR)) break;
if(Math.abs(oldCoordsR.y - event.getY(pIndexR)) < lnrInaccuracy &&
oldCoordsR.x > event.getX(pIndexR) && !movingRight) {
movingRight = true;
startPointR = new Point(new Point((int)event.getX(pIndexR), (int)event.getY(pIndexR)));
}
} else {
if (Math.abs(oldCoordsR.x - event.getX(pIndexR)) > downInaccuracy ||
oldCoordsR.y < event.getY(pIndexR)) {
movingDownR = false;
break;
} else if(findDistance(startPointR,
new Point((int)event.getX(pIndexR), (int)event.getY(pIndexR))) >= downMinDistance){
movingDownR = false;
}
}
}
if(!movingDownL) {
if(Math.abs(oldCoordsL.x - event.getX(pIndexL)) < downInaccuracy &&
oldCoordsL.y < event.getY(pIndexL)) break;
if(Math.abs(oldCoordsL.y - event.getY(pIndexL)) < lnrInaccuracy &&
oldCoordsL.x < event.getX(pIndexL) && !movingLeft) {
movingLeft = true;
startPointL = new Point(new Point((int)event.getX(pIndexL), (int)event.getY(pIndexL)));
}
}else {
if (Math.abs(oldCoordsL.x - event.getX(pIndexL)) > downInaccuracy ||
oldCoordsL.y > event.getY(pIndexL)) {
movingDownL = false;
break;
} else if(findDistance(startPointL,
new Point((int)event.getX(pIndexL), (int)event.getY(pIndexL))) >= downMinDistance){
movingDownL = false;
}
}
int lnrMinDistance = 50;
if(movingLeft) {
if (Math.abs(oldCoordsL.y - event.getY(pIndexL)) > lnrInaccuracy ||
oldCoordsL.x > event.getX(pIndexL)) {
movingLeft = false;
break;
} else if(findDistance(startPointL,
new Point((int)event.getX(pIndexL), (int)event.getY(pIndexL))) >= lnrMinDistance) {
movingLeft = false;
movingSuccessL = true;
}
}
if(movingRight) {
if (Math.abs(oldCoordsR.y - event.getY(pIndexR)) > lnrInaccuracy ||
oldCoordsR.x < event.getX(pIndexR)) {
movingRight = false;
break;
} else if(findDistance(startPointR,
new Point((int)event.getX(pIndexR), (int)event.getY(pIndexR))) >= lnrMinDistance) {
movingRight = false;
movingSuccessR = true;
}
}
if(movingSuccessL && movingSuccessR) {
if (!admin_touch)
{
admin_touch = true;
if (callback != null)
callback.lTouchSuccess();
}
}
oldCoordsL = new Point((int)event.getX(pIndexL), (int)event.getY(pIndexL));
oldCoordsR = new Point((int)event.getX(pIndexR), (int)event.getY(pIndexR));
break;
case MotionEvent.ACTION_UP:
movingDownL = false;
movingDownR = false;
movingLeft = false;
movingRight = false;
break;
default:
return false;
}
return true;
}
private double findDistance(Point p1, Point p2) {
return Math.sqrt(Math.pow(p1.x - p2.x, 2) + Math.pow(p1.y - p2.y, 2));
}
}
在我的Activity中，我将这个工具称为：
public class MainActivity extends AppCompatActivity implements View.OnTouchListener {
TouchListenerImpl imp = new TouchListenerImpl();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
imp.setCallback(new TouchListenerImpl.OnLTouch() {
@Override
public void lTouchSuccess() {
Log.d("debugTouch", "WORKING !");
}
});
}
@Override
public boolean onTouch(View v, MotionEvent event) {
Log.d("debugTouch", "onTouch");
return imp.onTouch(v, event);
}
}
问题是我从未输入我的日志。它根本不起作用......
答案 0 :(得分：6)
您可以使用@DrilonBlakqori解决方案，只需稍加修改。
创建一个包含公共代码的单独类，但使用回调使View可见。
class TouchListenerImpl implements OnTouchListener {
private OnLTouch callback;
@Override
public boolean onTouch(View v, MotionEvent event) {
// all your code
...
if (callback != null)
callback.lTouchSuccess();
...
}
void setCallback(OnLTouch c) {
callback = c;
}
interface OnLTouch {
void lTouchSuccess();
}
}
在MainActivity中，创建TouchListenerImpl和setCallback的新实例
TouchListenerImpl imp = new TouchListenerImpl();
imp.setCallback(new OnLTouch() {
public void lTouchSuccess() {
frameLayoutAdmin.setVisibility(View.VISIBLE);
getSupportFragmentManager().beginTransaction()
.replace(R.id.framelayout_admin,new AdminLoginFragment())
.commit();
img_close.setVisibility(View.VISIBLE);
}
});
在MainActivity中，View上要View检测View上的双L ，在view.setOnTouchListener(imp);
上设置此侦听器。
findViewById(R.id.mylayout).setOnTouchListener(imp);
我假设您要检测主布局上的 double L 。为此你可以做到
<script type="text/javascript" src="bower_components/angular/angular.min.js"></script>
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/angular-ui-bootstrap/2.5.0/ui-bootstrap.min.js"></script>
我希望这能解决你的问题。
答案 1 :(得分：2)
您可以创建一个超类Activity，在那里覆盖onTouchEvent并从中扩展。 像这样：
public abstract class BaseActivity extends AppCompatActivity {
@Override
public boolean onTouchEvent(MotionEvent event) {
// Your implementation.
}
}
然后是您的MainActivity：
public class MainActivity extends BaseActivity {
}
答案 2 :(得分：1)
您可以创建一个扩展活动的超类并实现onTouchEvent方法，并且在您要使用onTouchEvent方法的任何活动中扩展您的超类。 MainActivity也必须扩展它。或者只是在要使用onTouchEvent方法的其他活动中扩展MainActivity。
答案 3 :(得分：1)
将所有代码与字段变量一起复制到实现OnTouchListener的类中。然后只需在需要时传递新的TouchListenerImpl。
class TouchListenerImpl implements OnTouchListener {
// your field variables
@Override
public boolean onTouch(View v, MotionEvent event) {
// all your code
return false;
}
// getters for the variables that you need
}
答案 4 :(得分：0)
您需要在活动的根目录中设置侦听器，并且需要注意视图层次结构。触摸事件可以被层次结构中的其他视图使用，这可能是您没有获取任何日志的原因。
我用最少的更改测试了你的听众，我得到了日志。我有一次双L触摸。
public class TouchListenerImpl implements View.OnTouchListener {
private boolean movingDownL, movingDownR, movingLeft, movingRight, movingSuccessL, movingSuccessR = false;
private Point oldCoordsL, oldCoordsR, startPointL, startPointR = new Point(0, 0);
private boolean admin_touch = false;
private OnLTouch callback;
public TouchListenerImpl(OnLTouch callback){
setCallback(callback);
}
void setCallback(OnLTouch c) {
callback = c;
}
public interface OnLTouch {
void lTouchSuccess();
}
@Override
public boolean onTouch(View v, MotionEvent event) {
Log.d("debugTouch", "onTouch");
int pIndexL = event.findPointerIndex(event.getPointerId(0));
int pIndexR = 0;
if(event.getPointerCount() > 1) pIndexR = event.findPointerIndex(event.getPointerId(1));
if(event.getPointerCount() > 1 && event.getX(pIndexL) > event.getX(pIndexR)) {
int tmp = pIndexR;
pIndexR = pIndexL;
pIndexL = tmp;
}
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
movingDownL = true;
movingDownR = true;
movingSuccessL = false;
movingSuccessR = false;
if(event.getPointerCount() > 1) {
startPointR = new Point((int) event.getX(pIndexR), (int) event.getY(pIndexR));
oldCoordsR = new Point((int) event.getX(pIndexR), (int) event.getY(pIndexR));
}
startPointL = new Point((int) event.getX(pIndexL), (int) event.getY(pIndexL));
oldCoordsL = new Point((int) event.getX(pIndexL), (int) event.getY(pIndexL));
break;
case MotionEvent.ACTION_MOVE:
int downMinDistance = 300;
int lnrInaccuracy = 10;
int downInaccuracy = 30;
if(event.getPointerCount() > 1) {
if(!movingDownR) {
if(Math.abs(oldCoordsR.x - event.getX(pIndexR)) < downInaccuracy &&
oldCoordsR.y < event.getY(pIndexR)) break;
if(Math.abs(oldCoordsR.y - event.getY(pIndexR)) < lnrInaccuracy &&
oldCoordsR.x > event.getX(pIndexR) && !movingRight) {
movingRight = true;
startPointR = new Point(new Point((int)event.getX(pIndexR), (int)event.getY(pIndexR)));
}
} else {
if (Math.abs(oldCoordsR.x - event.getX(pIndexR)) > downInaccuracy ||
oldCoordsR.y < event.getY(pIndexR)) {
movingDownR = false;
break;
} else if(findDistance(startPointR,
new Point((int)event.getX(pIndexR), (int)event.getY(pIndexR))) >= downMinDistance){
movingDownR = false;
}
}
}
if(!movingDownL) {
if(Math.abs(oldCoordsL.x - event.getX(pIndexL)) < downInaccuracy &&
oldCoordsL.y < event.getY(pIndexL)) break;
if(Math.abs(oldCoordsL.y - event.getY(pIndexL)) < lnrInaccuracy &&
oldCoordsL.x < event.getX(pIndexL) && !movingLeft) {
movingLeft = true;
startPointL = new Point(new Point((int)event.getX(pIndexL), (int)event.getY(pIndexL)));
}
}else {
if (Math.abs(oldCoordsL.x - event.getX(pIndexL)) > downInaccuracy ||
oldCoordsL.y > event.getY(pIndexL)) {
movingDownL = false;
break;
} else if(findDistance(startPointL,
new Point((int)event.getX(pIndexL), (int)event.getY(pIndexL))) >= downMinDistance){
movingDownL = false;
}
}
int lnrMinDistance = 50;
if(movingLeft) {
if (Math.abs(oldCoordsL.y - event.getY(pIndexL)) > lnrInaccuracy ||
oldCoordsL.x > event.getX(pIndexL)) {
movingLeft = false;
break;
} else if(findDistance(startPointL,
new Point((int)event.getX(pIndexL), (int)event.getY(pIndexL))) >= lnrMinDistance) {
movingLeft = false;
movingSuccessL = true;
}
}
if(movingRight) {
if (Math.abs(oldCoordsR.y - event.getY(pIndexR)) > lnrInaccuracy ||
oldCoordsR.x < event.getX(pIndexR)) {
movingRight = false;
break;
} else if(findDistance(startPointR,
new Point((int)event.getX(pIndexR), (int)event.getY(pIndexR))) >= lnrMinDistance) {
movingRight = false;
movingSuccessR = true;
}
}
if(movingSuccessL && movingSuccessR) {
if (!admin_touch)
{
admin_touch = true;
if (callback != null)
callback.lTouchSuccess();
}
}
oldCoordsL = new Point((int)event.getX(pIndexL), (int)event.getY(pIndexL));
oldCoordsR = new Point((int)event.getX(pIndexR), (int)event.getY(pIndexR));
break;
case MotionEvent.ACTION_UP:
movingDownL = false;
movingDownR = false;
movingLeft = false;
movingRight = false;
break;
default:
return false;
}
return true;
}
private double findDistance(Point p1, Point p2) {
return Math.sqrt(Math.pow(p1.x - p2.x, 2) + Math.pow(p1.y - p2.y, 2));
}
}
使用那个：
public class SplashActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_splash);
RelativeLayout layout = (RelativeLayout) findViewById(R.id.activity_splash);
layout.setOnTouchListener(new TouchListenerImpl(new TouchListenerImpl.OnLTouch() {
@Override
public void lTouchSuccess() {
Toast.makeText(getThis(), "L touched!", Toast.LENGTH_SHORT).show();
}
}));
}
public AppCompatActivity getThis(){
return this;
}
}
就像我之前说的那样，你没有获得任何日志的原因可能是你的等级。确保您的触摸事件不被其他视图使用。为了处于最安全的一面，你应该使用FrameLayout作为这种行为的根元素，以及一个布尔变量，它允许你决定是否应该使用L监听器。
选中此项以获取进一步参考： https://github.com/fcopardo/EnhancedMapView 如果您检查EnhancedMapView文件，您会发现：
public void setOnEnhancedCameraChangeListener(OnEnhancedCameraChangeListener listener){
if(map!=null){
map.setOnCameraChangeListener(camera -> {
if(!isContentTouched() && !isCaptureTouches()){
listener.onCameraChange(camera);
}
});
}
}
这与你正在做的非常相似。我建议你使用类似的方法，一个实现L touch监听器的框架布局子类，然后使用这样的布局作为视图和活动的根类。如果这有帮助，请告诉我。