Android以编程方式触发长时间按HOME键

Question

我正在尝试找到一种以编程方式模仿长按HOME按钮的操作的方法。我有使用以下代码的“返回”按钮：

this.dispatchKeyEvent(new KeyEvent(KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_BACK));
this.dispatchKeyEvent(new KeyEvent(KeyEvent.ACTION_UP, KeyEvent.KEYCODE_BACK));

但是当我尝试模仿（长）HOME时，按相同的方式：

this.dispatchKeyEvent(new KeyEvent(KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_HOME));
// Thread.sleep(1000); Perhaps for long press?
this.dispatchKeyEvent(new KeyEvent(KeyEvent.ACTION_UP, KeyEvent.KEYCODE_HOME));

没有任何反应。还有其他方法可以模仿按下HOME按钮吗？

Answer 1

您可以尝试以下方法：

this.dispatchKeyEvent(new KeyEvent((long) ViewConfiguration.getLongPressTimeout(), (long) 0, KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_HOME), 0); // ViewConfiguration.getLongPressTimeout() returns the duration in milliseconds before a press turns into a long press

它使用此构造函数：

/**
 * Create a new key event.
 *
 * @param downTime The time (in {@link android.os.SystemClock#uptimeMillis})
 * at which this key code originally went down.
 * @param eventTime The time (in {@link android.os.SystemClock#uptimeMillis})
 * at which this event happened.
 * @param action Action code: either {@link #ACTION_DOWN},
 * {@link #ACTION_UP}, or {@link #ACTION_MULTIPLE}.
 * @param code The key code.
 * @param repeat A repeat count for down events (> 0 if this is after the
 * initial down) or event count for multiple events.
 */
public KeyEvent(long downTime, long eventTime, int action,
                int code, int repeat) {
    mDownTime = downTime;
    mEventTime = eventTime;
    mAction = action;
    mKeyCode = code;
    mRepeatCount = repeat;
    mDeviceId = KeyCharacterMap.VIRTUAL_KEYBOARD;
}

请参见this。这可能会有所帮助。