文本输入与输出

文本输入findViewById，监听按钮button.setOnClickListener，文本输出setText。

package com.example.gogear777.myapplication;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.view.View.OnClickListener;




public class MyActivity extends Activity {
    private EditText user = null;
    private TextView result = null;
    private Button button = null;


    public void onCreate(Bundle savedInstanceState) {


        super.onCreate(savedInstanceState);
        //载入main.xml Layout,此时myTextView:text为hello
        setContentView(R.layout.activity_my);
        user = (EditText) findViewById(R.id.user);
        result = (TextView) findViewById(R.id.result);
        button = (Button) findViewById(R.id.button);
        button.setOnClickListener(new OnClickListener() {
            public void onClick(View view) {
                String name = user.getText().toString();


                System.out.println(name);
                result.setText(name);
            }




        });
    }
}