首先初始化您的按钮，然后将onclicklistener设置为它们
@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);//initialize views here EditText mEdit = (EditText)findViewById(R.id.editText1);TextView myTextView = (TextView) findViewById(R.id.label);Button yourButton=(Button)findViewByid(R.id.youridforbutton);//set onclicklistener for your button yourbutton.setonClickListener( new View.onClickListener() { @Override public void onClick(View v) {number = mEdit.getText().toString();number2 = Integer.parseInt(number);if(F=true){output=number2*9/5+32;}else{output=number2-32*5/9;}myTextView.setText(""+output);}});}同样设置另一个按钮
