关于setOnCheckedChangeListener的使用

toggleButton

public class ToggleActivity extends Activity implements CompoundButton.OnCheckedChangeListener {    private ToggleButton tb;    private ImageView img;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.toggle_layout);        tb=(ToggleButton)findViewById(R.id.toggle);        img=(ImageView)findViewById(R.id.image);        //给tb监听        tb.setOnCheckedChangeListener(this);    }    @Override    public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {        /*        buttonView代表被点击控件的本身，isChecked代表状态         */        img.setBackgroundResource(isChecked? R.drawable.deng1:R.drawable.deng2);    }}

布局

CheckBox

复选框，可以有多个，而且在屏幕中选择的时候可以取消

/** * Checkbox的使用方法 */public class TestActivity extends Activity implements CompoundButton.OnCheckedChangeListener {    private CheckBox checkBox;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_test);        checkBox=(CheckBox)findViewById(R.id.basketball);        checkBox.setOnCheckedChangeListener(this);    }    @Override    public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {        if(isChecked){            //获得文本内容            String text=checkBox.getText().toString();            Log.i("tag",text);        }    }}

RadioGroup/RadioButton

单选按钮集合和单选按钮，只能在集合中选择一个，且必须有一个

public class RadioGroupActivity extends AppCompatActivity implements RadioGroup.OnCheckedChangeListener {    private RadioGroup rg;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_radio_group);        rg.setOnCheckedChangeListener(this);    }    @Override    public void onCheckedChanged(RadioGroup group, int checkedId) {        switch (checkedId){            case R.id.rd1:                Log.i("tag","man");                break;            case R.id.rd2:                Log.i("tag","female");                break;        }    }}

更多相关文章

随机推荐