矽谷商城2--自定義數字加減控制項

1_自定義數字加減控制項的要求

 創建Module -NumberAddSubView

A_輸入的只能是數字，而且不能通過鍵盤輸入

B_通過加減按鈕操作數字

C_監聽加減按鈕

D_數組有最小值和最大值的限制

E_自定義屬性

2_提供介面，讓外界監聽到數字的變化

1_設置介面

@Override
public void onClick(View v) {
	if (v.getId() == R.id.btn_sub) {
                //Toast.makeText(mContext,"減",Toast.LENGTH_SHORT).show();
		subNum();
		if (onButtonClickListenter != null) {
			onButtonClickListenter.onButtonSubClick(v, value);
		}
	} else if (v.getId() == R.id.btn_add) {
                //Toast.makeText(mContext,"加",Toast.LENGTH_SHORT).show();
		addNum();
		if (onButtonClickListenter != null) {
			onButtonClickListenter.onButtonAddClick(v, value);
		}
	}
}

public interface OnButtonClickListenter {
	/**
	 * 當增加按鈕被點擊的時候回調該方法
	 *
	 * @param view
	 * @param value
	 */
	public void onButtonAddClick(View view, int value);

	/**
	 * 當減少按鈕被點擊的時候回調這個方法
	 *
	 * @param view
	 * @param value
	 */
	public void onButtonSubClick(View view, int value);
}

private OnButtonClickListenter onButtonClickListenter;

public void setOnButtonClickListenter(OnButtonClickListenter onButtonClickListenter) {
	this.onButtonClickListenter = onButtonClickListenter;
}

2_監聽變化

public class MainActivity extends AppCompatActivity {

    private NumberAddSubView nb_addsub_view;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        nb_addsub_view = (NumberAddSubView) findViewById(R.id.nb_addsub_view);

        nb_addsub_view.setOnButtonClickListenter(new NumberAddSubView.OnButtonClickListenter() {
            @Override
            public void onButtonAddClick(View view, int value) {
                Toast.makeText(MainActivity.this,"AddClick Vaule=="+value,Toast.LENGTH_SHORT).show();
            }

            @Override
            public void onButtonSubClick(View view, int value) {
                Toast.makeText(MainActivity.this,"SubClick Vaule=="+value,Toast.LENGTH_SHORT).show();
            }
        });
    }
}

3_自定義屬性

 <com.atguigu.numberaddsubview.NumberAddSubView
        android:id="@+id/nunber_add_sub_view"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerInParent="true"
        atguigu:value="3"
        atguigu:minValue="2"
        atguigu:maxValue="15"
        atguigu:numberAddSubBackground="@drawable/number_add_sub_view_selector"
        atguigu:numberSubBackground="@drawable/btn_number_selector"
        atguigu:numberAddBackground="@drawable/btn_number_selector"
        />

github完整代碼:https://github.com/ganchuanpu/NumberAddSubView