Android -- TextView与EditText 同步显示

Android -- TextView与EditText 同步显示 文章分类:JavaEye

方法一.利用View.OnKeyListener"同步"显示

Java代码

EditText myEdit = (EditText)findViewById(R.id.myEdit);

TextView myText = (TextView)findViewById(R.id.myText);

myEdit.setOnKeyListener(new EditText.OnClickListener(){

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

{

myText.setText(myEdit.getText());

return false;

}

});

方法二. 利用TextWatcher,真正实现同步

Java代码

import android.app.Activity;

import android.os.Bundle;

import android.text.Editable;

import android.text.TextWatcher;

import android.widget.EditText;

import android.widget.TextView;

public class TextWatcherDemo extends Activity implements TextWatcher{

/** Called when the activity is first created. */

private TextView myText;

private EditText myEdit;

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

myText=(TextView)findViewById(R.id.text);

myEdit=(EditText)findViewById(R.id.edit);

myEdit.addTextChangedListener(this);

}

@Override

public void afterTextChanged(Editable s) {

// TODO Auto-generated method stub

}

@Override

public void beforeTextChanged(CharSequence s, int start, int count,

int after) {

// TODO Auto-generated method stub

}

@Override

public void onTextChanged(CharSequence s, int start, int before, int count) {

// TODO Auto-generated method stub

myText.setText(myEdit.getText());

}

}