[Android]_ch2.2_EditText事件處理OnKeyListener

[Android]_ch2.2_EditText事件處理OnKeyListener



et3=(EditText)findViewById(R.id.editText3);

         tv4=(TextView)findViewById(R.id.textView4);

        et3.setOnKeyListener(new OnKeyListener(){

@Override

public boolean onKey(View v, int keyCode, KeyEvent event) {

if(event.getAction()==KeyEvent.ACTION_DOWN && keyCode==KeyEvent.KEYCODE_ENTER){

String msg=et3.getText().toString();

tv4.setText(msg);

// Toast toast=new Toast(MainActivity.this);

// toast.setText(msg);

// toast.setDuration(Toast.LENGTH_SHORT);

// toast.show();

Toast.makeText(MainActivity.this, msg, Toast.LENGTH_SHORT).show();

}

return false;

}});