Android 自定义Button 模拟back事件

button 的onclick方法中使用如下：

 InputManager iMgr = (InputManager) mContext.getSystemService(mContext.INPUT_SERVICE);
                if (iMgr != null) {
                    long time = SystemClock.uptimeMillis();
                    KeyEvent evt = new KeyEvent(time, time,
                            true ? KeyEvent.ACTION_DOWN : KeyEvent.ACTION_UP,
                                    KeyEvent.KEYCODE_BACK, 0);
                    iMgr.injectInputEvent(evt, InputManager.INJECT_INPUT_EVENT_MODE_ASYNC);
                    
                     evt = new KeyEvent(time, time,
                            false ? KeyEvent.ACTION_DOWN : KeyEvent.ACTION_UP,
                                    KeyEvent.KEYCODE_BACK, 0);
                    iMgr.injectInputEvent(evt, InputManager.INJECT_INPUT_EVENT_MODE_ASYNC);
                }

即可。