問題描述
我不知道如何從我自己的按鈕向 EditText 發送退格鍵事件.這是我嘗試過的:
I don't know how to send a backspace key event to a EditText from my own button. Here is what i tried:
Button backSpace=(Button)findViewById(R.id.backSpace_tab);
backSpace.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
text.dispatchKeyEvent(new KeyEvent(KeyEvent.KEYCODE_DEL,KeyEvent.KEYCODE_P));
}
});
推薦答案
來自Android 開發者文檔:
public KeyEvent (int action, int code)
public KeyEvent (int action, int code)
創建一個新的關鍵事件.
Create a new key event.
參數
action 操作代碼:ACTION_DOWN、ACTION_UP 或 ACTION_MULTIPLE.
代碼 關鍵代碼
Parameters
action Action code: either ACTION_DOWN, ACTION_UP, or ACTION_MULTIPLE.
code The key code
第一個參數應該是一個動作代碼.在您的情況下，您應該使用 ACTION_DOWN，因為您想模擬一個按鍵:
The first parameter should be an action code. In your case you should use ACTION_DOWN, because you want to simulate a keypress:
public static final int ACTION_DOWN
public static final int ACTION_DOWN
getAction() 值:按鍵已被按下.
getAction() value: the key has been pressed down.
所以這應該有效:
@Override
public void onClick(View v)
{
text.dispatchKeyEvent(new KeyEvent(KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_DEL));
}
這篇關于發送退格鍵事件以編輯文本的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網！