简单的混合自定义View

public class AddDecView extends LinearLayout {


    private TextView addtext;
    private TextView dectext;
    private EditText etshow;
    private int count = 0;

    public AddDecView(Context context) {
        this(context, null);
    }

    public AddDecView(Context context, AttributeSet attrs) {
        this(context, attrs, 0 );
    }

    public AddDecView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);

        View view = View.inflate(context, R.layout.view_add, this);
        addtext = (TextView) view.findViewById(R.id.add_text);
        dectext = (TextView) view.findViewById(R.id.dec_text);
        etshow = (EditText) view.findViewById(R.id.ed_show);
        etshow.setText(count + "");
        addtext.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View view) {
                count++;
                etshow.setText(count + "");
            }
        });
        dectext.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View view) {
                if (count>0){

                    count--;
                }
                etshow.setText(count + "");
            }
        });
    }

    public int getCount() {

        return count;
    }

    public void setCount(int i) {
        this.count = count;

        etshow.setText(count + "");
    }


}



public class MainActivity extends AppCompatActivity {
    private AddDecView adv;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        adv= (AddDecView) findViewById(R.id.adv);
        adv.setCount(0);
    }
}
<TextView

    android:id="@+id/dec_text"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:background="#aba9a9"

    android:padding="10dp"
    android:text="-" />

<TextView
    android:id="@+id/add_text"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentRight="true"
    android:background="#aba9a9"
    android:padding="10dp"
    android:text="+" />

<EditText
    android:textColor="#05faee"
    android:layout_marginLeft="10dp"
    android:layout_marginRight="10dp"
    android:gravity="center"
    android:background="@null"
    android:text="0"
    android:id="@+id/ed_show"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_toLeftOf="@+id/add_text"
    android:layout_toRightOf="@+id/dec_text"
    android:inputType="number"

    />