Android Button

1.建立Button元件 activity_main.xml

2.建立字串 strings.xml

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3.建立監聽事件 MainActivity.java

 private Button button1; //宣告button
 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
  button1 = (Button) findViewById(R.id.button1); //初始化，從activity_main.xml抓到id
  start_button.setOnClickListener(new Button.OnClickListener() { //建立監聽事件

   @Override
   public void onClick(View v) { //點擊button動作
    // TODO Auto-generated method stub
    output.setText("Button被點了"); //如要使用其他動作可另外寫ex:run(v);
   }

  });
  button1.performClick(); //performClick()為自動按按鈕，必須放在監聽事件後面
 }