2、实现如下代码

public class MainActivity extends AppCompatActivity {    TextView tx1, tx2;    Switch sw;    ToggleButton tb;    int a, b;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        tx1 = (TextView) findViewById(R.id.textView);        tx2 = (TextView) findViewById(R.id.textView2);        sw = (Switch) findViewById(R.id.switch1);        tb = (ToggleButton) findViewById(R.id.toggleButton);        sw.setText("芝麻门");        sw.setTextColor(Color.RED);        sw.setOnClickListener(linstener1);        tb.setText("开关2");        tb.setTextColor(Color.GREEN);        tb.setOnClickListener(linstener2);        a = 1;        b = 1;    }    //监听器1要做的事情    Switch.OnClickListener linstener1 = new Switch.OnClickListener() {        public void onClick(View v) {            if (a == 1) {                tx1.setText("芝麻开门");                tx1.setTextColor(Color.GREEN);                a++;            }            else            {tx1.setText("门已关");                tx1.setTextColor(Color.BLACK);                a=1;            }        }    };    //监听器2要做的事情    ToggleButton.OnClickListener linstener2 = new ToggleButton.OnClickListener() {        public void onClick(View v) {            if(b==1)            {                tx2.setText("灯已开");                tx2.setTextColor(Color.RED);                b++;            }            else            {                tx2.setText("灯已关");                tx2.setTextColor(Color.BLACK);                b=1;            }        }    };}

运行效果