package?com.example.to; import?android.support.v7.app.AppCompatActivity; import?android.os.Bundle; import?android.widget.CompoundButton; import?android.widget.ImageView; import?android.widget.ToggleButton; public?class?MainActivity?extends?AppCompatActivity?implements?OnCheckedChangeListener{ ????/** ?????*?初始化 ?????*?*/ ????private?ImageView?ima; ????private?ToggleButton?tb; ????@Override ????protected?void?onCreate(Bundle?savedInstanceState)?{ ????????super.onCreate(savedInstanceState); ????????setContentView(R.layout.activity_main); ????????tb?=?(ToggleButton)?findViewById(R.id.toggleButton); ????????ima?=?(ImageView)?findViewById(R.id.imageView; ????????tb.setOnCheckedChangeListener(this); ????} ????@Override ????public?void?OnCheckedChanged(CompoundButton?buttonView,?boolean?isChecked){ ????????ima.setBackground(isChecked?R.drawable.OFF:R.drawable.ON); ????} }OnCheckedChangeListenerOnCheckedChangeListener有問題，一直報錯。