回答這可能對他人有幫助.答案將有助于需要攔截觸摸事件的庫.

如果你不想覆蓋dispatchTouchEvent()(Imp,如果你是編程庫)方法的活動,那么我們可以使用Window.Callback類.創建您自己的Window.Callback實現作為下面的代碼,然后將其設置為從您的活動回調Window對象.

在下面的代碼片段中,為您獲取的Activity上下文實例做.

//set Window.Callback for getting touch event

final Window win = context.getWindow();

final Window.Callback localCallback = win.getCallback();

win.setCallback(new MyWindowCallback(localCallback));

MyWindowCallback類將為：

您將在MyWindowCallback的dispatchTouchEventMethod()中獲取TouchEvent,您可以根據需要使用這些.

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);

}

}

總結

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