Radio Button物件

Radio Button物件通常用於"單選"項目
mian.xml
    <RadioGroup
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical">
        <RadioButton
            android:id="@+id/radio_red"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Red" />
        <RadioButton
            android:id="@+id/radio_blue"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Blue" />
    </RadioGroup>

Xxx.java
    public void onCreate(Bundle savedInstanceState) {
        .......
        RadioButton radio_red = (RadioButton) findViewById(R.id.radio_red);
        RadioButton radio_blue = (RadioButton) findViewById(R.id.radio_blue);
        radio_red.setOnClickListener(radio_listener);
        radio_blue.setOnClickListener(radio_listener);
    }

    private OnClickListener radio_listener = new OnClickListener() {
        public void onClick(View v) {
            // Perform action on clicks
            RadioButton rb = (RadioButton) v;
            // 顯示選擇項目
            Toast.makeText(HelloFormStuff.this, rb.getText(), Toast.LENGTH_SHORT).show();
        }
    };
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    private RadioGroup.OnCheckedChangeListener change =
        new RadioGroup.OnCheckedChangeListener() {
        public void onCheckedChanged(RadioGroup group, int checkedId) {
            if (checkedId == mRadio1.getId()) {
                Toast.makeText(radio.this, "1", Toast.LENGTH_SHORT).show();
            }
            if (checkedId == mRadio2.getId()) {
                Toast.makeText(radio.this, "2", Toast.LENGTH_SHORT).show();
            }
        }
    };