如何在android中制作键盘应用程序

Question

我想在android中制作键盘应用程序。

为此，我尝试下面的代码，但它确实无效。

1. 我在活动中制作button1，
2. 我按下按钮1
3. 然后我希望它与我在键盘上输入键时相同。

我该怎么做？请帮忙。

public class MainActivity extends Activity {

Button button1;
EditText edit;

KeyEvent keyevent1;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    button1 = (Button) findViewById(R.id.button);

    button1.setOnClickListener(new OnClickListener(){

        public void onClick(View v){

            keyevent1 = new KeyEvent(KeyEvent.ACTION_DOWN,KeyEvent.KEYCODE_ENTER);


            System.out.println("aaaa:  " + keyevent1);

            onKeyDown(KeyEvent.KEYCODE_ENTER, keyevent1);

        }

    });     
}

@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {

    System.out.println("bbbb:  " + event);

    return super.onKeyDown(keyCode, event);
}

}

Answer 1

addCourseText = (EditText) findViewById(R.id.clEtAddCourse);
addCourseText.setOnKeyListener(new OnKeyListener()
{
public boolean onKey(View v, int keyCode, KeyEvent event)
{
    if (event.getAction() == KeyEvent.ACTION_DOWN)
    {
        switch (keyCode)
        {
            case KeyEvent.KEYCODE_DPAD_CENTER:
            case KeyEvent.KEYCODE_ENTER:
                addCourseFromTextBox();
                return true;
            default:
                break;
        }
    }
    return false;
}});