setOnKeyListener监听键盘事件

addTextChangedListener监听文本改变事件

package com.example.edittext_textview_setonkeylistener;import android.support.v7.app.ActionBarActivity;import android.support.v7.app.ActionBar;import android.support.v4.app.Fragment;import android.text.Editable;import android.text.TextWatcher;import android.os.Bundle;import android.view.KeyEvent;import android.view.LayoutInflater;import android.view.Menu;import android.view.MenuItem;import android.view.View;import android.view.View.OnKeyListener;import android.view.ViewGroup;import android.widget.EditText;import android.widget.TextView;import android.widget.Toast;import android.os.Build;//类似于手机的ajax et输入文字，同步显示在tv//可以通过这个方法对文字进行过滤，当用户输入不雅的文字时，提示用户不接受部分关键字//例如  shit，显示的是sh*tpublic class MainActivity extends ActionBarActivity {	private TextView mTextView01; 	private EditText mEditText01; 	  	@Override	protected void onCreate(Bundle savedInstanceState) {		super.onCreate(savedInstanceState);		setContentView(R.layout.activity_main);				mTextView01 = (TextView)findViewById(R.id.myTextView);	    mEditText01 = (EditText)findViewById(R.id.myEditText);	    	    //android多数Widget都有setOnKeyListener事件	    //案例好像不太成功，不知道是不是因为手机的原因，没有进行测试//	    mEditText01.setOnKeyListener(new OnKeyListener() {//			//			@Override//			public boolean onKey(View v, int keyCode, KeyEvent event) {//				// TODO Auto-generated method stub//				//				mTextView01.setText(mEditText01.getText());//				Toast.makeText(getApplicationContext(), mEditText01.getText(), 0).show();//				return false;//			}//		});	    	    mEditText01.addTextChangedListener(new TextWatcher() {						@Override			public void onTextChanged(CharSequence s, int start, int before, int count) {				// TODO Auto-generated method stub				mTextView01.setText(mEditText01.getText());			}						@Override			public void beforeTextChanged(CharSequence s, int start, int count,					int after) {				// TODO Auto-generated method stub							}						@Override			public void afterTextChanged(Editable s) {				// TODO Auto-generated method stub							}		});	}}