4.3 Toast的使用

package com.chaowen;

import android.app.Activity;
import android.os.Bundle;
import android.text.Editable;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

public class Ex04_03_Toast extends Activity {
    /** Called when the activity is first created. */
	private TextView mTextView;
	private EditText mEditText;
	private Button button;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        mTextView=(TextView)findViewById(R.id.myTextView);
        mEditText=(EditText)findViewById(R.id.myEditText);
        button=(Button)findViewById(R.id.myButton);
        
        button.setOnClickListener(new Button.OnClickListener(){

			@Override
			public void onClick(View v) {
			      //声明字符串变量并取得用户输入的EditText字符串
				Editable str;
				str=mEditText.getText();
				
				//使用系统标准的makeText方式来产生Toast信息
				Toast.makeText(Ex04_03_Toast.this, "你的愿望"+str.toString()+"已经送给圣诞老人的信箱", Toast.LENGTH_LONG).show();
				
			}
        	
        });
    }
}