Android - TextView与EditText 同步展示

Android -- TextView与EditText 同步显示
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());  
    }  
      
}