android - 在不覆盖 dispatchTouchEvent() 的情况下检测每个触摸事件？

Question

我正在开发 Android 库，它需要跟踪使用它的应用程序上的所有触摸事件。现在，用户应该在他们的每个 Activity 中覆盖他们的 Activity 的 dispatchTouchEvent()。如下图

@Override
public boolean dispatchTouchEvent(MotionEvent event) {
    MyLib.dispatchTouchEvent(event);
    return super.dispatchTouchEvent(event);
}

但是Appsee使用 Appsee.start(“key”); 在应用程序启动的第一个 Activity 中集成的 onCreate 方法上检测触摸事件。这怎么可能。有帮助吗？？

Answer 1

回答，因为这可能对其他人有帮助。回答将有助于需要拦截触摸事件的库。

如果您不想覆盖 Activity 的 dispatchTouchEvent()(如果您正在为库编码)方法，那么我们可以使用 Window.Callback 类。按照下面的代码创建您自己的 Window.Callback 实现，然后将其设置为从您的 Activity 到 Window 对象的回调。

按照下面的代码 fragment 为您获得的 Activity 上下文实例执行操作。

//set Window.Callback for getting touch event
        final Window win = context.getWindow();
        final Window.Callback localCallback = win.getCallback();
        win.setCallback(new MyWindowCallback(localCallback));

类 MyWindowCallback 将是:

您将在 MyWindowCallback 的 dispatchTouchEventMethod() 上获得 TouchEvent，您可以根据需要在其中使用它们。

import android.annotation.SuppressLint;
import android.util.Log;
import android.view.ActionMode;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.MenuItem;
import android.view.MotionEvent;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;
import android.view.accessibility.AccessibilityEvent;

public class MyWindowCallback implements Window.Callback{

    Window.Callback localCallback;

    public MyWindowCallback(Window.Callback localCallback) {
        this.localCallback = localCallback;
    }

    @Override
    public boolean dispatchKeyEvent(KeyEvent event) {
        return localCallback.dispatchKeyEvent(event);
    }

    @SuppressLint("NewApi")
    @Override
    public boolean dispatchKeyShortcutEvent(KeyEvent event) {
        return localCallback.dispatchKeyShortcutEvent(event);
    }

    @Override
    public boolean dispatchTouchEvent(MotionEvent event) {
        //YOU WILL GET TOUCH EVENTS HERE>> USE AS REQUIRED>>
        return localCallback.dispatchTouchEvent(event);
    }

    @Override
    public boolean dispatchTrackballEvent(MotionEvent event) {
        return localCallback.dispatchTrackballEvent(event);
    }

    @SuppressLint("NewApi")
    @Override
    public boolean dispatchGenericMotionEvent(MotionEvent event) {
        return localCallback.dispatchGenericMotionEvent(event);
    }

    @Override
    public boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event) {
        return localCallback.dispatchPopulateAccessibilityEvent(event);
    }

    @Override
    public View onCreatePanelView(int featureId) {
        return localCallback.onCreatePanelView(featureId);
    }

    @Override
    public boolean onCreatePanelMenu(int featureId, Menu menu) {
        return localCallback.onCreatePanelMenu(featureId, menu);
    }

    @Override
    public boolean onPreparePanel(int featureId, View view, Menu menu) {
        boolean ret = localCallback.onPreparePanel(featureId, view, menu);
        return ret;
    }

    @Override
    public boolean onMenuOpened(int featureId, Menu menu) {
        return localCallback.onMenuOpened(featureId, menu);
    }

    @Override
    public boolean onMenuItemSelected(int featureId, MenuItem item) {
        return localCallback.onMenuItemSelected(featureId, item);
    }

    @Override
    public void onWindowAttributesChanged(WindowManager.LayoutParams attrs) {
        localCallback.onWindowAttributesChanged(attrs);
    }

    @Override
    public void onContentChanged() {
        localCallback.onContentChanged();
    }

    @Override
    public void onWindowFocusChanged(boolean hasFocus) {
        Log.d("","ttest onfocus changed called");
        localCallback.onWindowFocusChanged(hasFocus);
    }

    @Override
    public void onAttachedToWindow() {
        localCallback.onAttachedToWindow();
    }

    @Override
    public void onDetachedFromWindow() {
        localCallback.onDetachedFromWindow();
    }

    @Override
    public void onPanelClosed(int featureId, Menu menu) {
        localCallback.onPanelClosed(featureId, menu);
    }

    @Override
    public boolean onSearchRequested() {
        return localCallback.onSearchRequested();
    }

    @SuppressLint("NewApi")
    @Override
    public ActionMode onWindowStartingActionMode(ActionMode.Callback callback) {
        return localCallback.onWindowStartingActionMode(callback);
    }

    @SuppressLint("NewApi")
    @Override
    public void onActionModeStarted(ActionMode mode) {
        localCallback.onActionModeStarted(mode);

    }

    @SuppressLint("NewApi")
    @Override
    public void onActionModeFinished(ActionMode mode) {
        localCallback.onActionModeFinished(mode);

    }
}