Android自定义View之组合控件实现类似电商app顶部栏

<?xml version="1.0" encoding="utf-8"?><resources>  <declare-styleable name="TopBar">    <attr name="left_text" format="string" />// 左边文字    <attr name="right_text" format="string" /> // 右边文字    <attr name="center_text" format="string" />// 中间文字    <attr name="side_text_size" format="dimension" />//边界按钮大小    <attr name="center_text_size" format="dimension" />//中间文字大小    <attr name="text_color" format="color" />//文字颜色    <attr name="back_color" format="color" />//背景颜色    <attr name="left_icon" format="reference" />//左边的icon    <attr name="right_icon" format="reference" />//右边的icon    <attr name="center_icon" format="reference" />//中间的icon  </declare-styleable></resources>

TypedArray array = getContext().obtainStyledAttributes(attrs, R.styleable.TopBar);    mLeftText = array.getString(R.styleable.TopBar_left_text);    mRightText = array.getString(R.styleable.TopBar_right_text);    mCenterText = array.getString(R.styleable.TopBar_center_text);    side_text_size = (int) array.getDimension(R.styleable.TopBar_side_text_size, 10);    center_text_size = (int) array.getDimension(R.styleable.TopBar_center_text_size, 15);    mLeft_icon = array.getDrawable(R.styleable.TopBar_left_icon);    mRight_icon = array.getDrawable(R.styleable.TopBar_right_icon);    mCenter_icon = array.getDrawable(R.styleable.TopBar_center_icon);    text_color = array.getColor(R.styleable.TopBar_text_color, getResources().getColor(R.color.colorAccent));    back_color = array.getColor(R.styleable.TopBar_back_color, getResources().getColor(R.color.colorPrimary));    array.recycle();

//设置内容mLeftButton = new Button(getContext());//创建按钮mLeftButton.setText(mLeftText);//设置文字mLeftButton.setTextSize(side_text_size);//设置文字大小mLeftButton.setTextColor(text_color);//设置文字颜色mLeftButton.setBackgroundColor(Color.TRANSPARENT);//设置按钮的背景为透明LayoutParams leftParams = new LayoutParams(80, 150);//设置布局mLeft_icon.setBounds(0, 0, 55, 55); //设置icon的大小mLeftButton.setCompoundDrawables(null, mLeft_icon, null, null); //添加iconmLeftButton.setGravity(Gravity.CENTER);//设置置中addView(mLeftButton, leftParams);//添加按钮//右按钮类似,就不加注释了mRightButton = new Button(getContext());mRightButton.setText(mRightText);mRightButton.setTextSize(side_text_size);mRightButton.setTextColor(text_color);mRightButton.setBackgroundColor(Color.TRANSPARENT);mRight_icon.setBounds(0, 0, 55, 55);LayoutParams rightParams = new LayoutParams(80, 150);mRightButton.setCompoundDrawables(null, mRight_icon, null, null);mRightButton.setGravity(Gravity.CENTER);addView(mRightButton, rightParams);

mCenterTextView = new TextView(getContext());//初始化TextViewmCenterTextView.setText(mCenterText);//设置文字mCenterTextView.setTextSize(center_text_size);//设置文字大小mCenterTextView.setTextColor(text_color);//设置文字颜色mCenterTextView.setGravity(Gravity.CENTER_VERTICAL | Gravity.LEFT);//设置文字靠左mCenter_icon.setBounds(0, 0, 50, 50);//设置icon大小mCenterTextView.setCompoundDrawables(mCenter_icon, null, null, null);//添加iconLayoutParams params = new LayoutParams(0, 70);//创建布局属性  mCenterTextView.setBackground(getResources().getDrawable(R.drawable.bg_search));//设置背景params.weight = 1;//设置权重params.gravity = Gravity.CENTER;//设置居中params.setMargins(10, 0, 10, 0);//设置边界addView(mCenterTextView, params);//添加

@Overrideprotected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {    super.onMeasure(widthMeasureSpec, heightMeasureSpec);    int specWidth = MeasureSpec.getSize(widthMeasureSpec);//获取宽度    int specHeight = MeasureSpec.getSize(heightMeasureSpec);//获取高度    int heightMode = MeasureSpec.getMode(heightMeasureSpec);//获取高度的测量模式    int height = 0;//初始化要设置的高度    if (heightMode == MeasureSpec.EXACTLY) {//如果是确定的值,包括match_parent      height = specHeight; //最终的值即为测量值    } else {      height = 120; //如果不是确定的值就设置为指定的高度      if (heightMode == MeasureSpec.AT_MOST) {//如果是wrap_content就取测量值和指定值得最小值作为最终的值        height = Math.min(specHeight, 120);      }    }    setMeasuredDimension(specWidth, height);//设置宽高属性  }

public interface onClick {    void onLeftButtonClick();    void onCenterButtonClick();    void onRightButtonClick();  }

private onClick onClick;  public void setOnClick(TopBar.onClick onClick) {    this.onClick = onClick;  }

mLeftButton.setOnClickListener(new OnClickListener() {      @Override      public void onClick(View v) {        if (onClick != null) {          onClick.onLeftButtonClick();        }      }    });mCenterTextView.setOnClickListener(new OnClickListener() {      @Override      public void onClick(View v) {        if (onClick != null) {          onClick.onCenterButtonClick();        }      }    }); mRightButton.setOnClickListener(new OnClickListener() {      @Override      public void onClick(View v) {        if (onClick != null) {          onClick.onRightButtonClick();        }      }    });

  <com.brioa.diyviewtest.view.TopBar xmlns:app="http://schemas.android.com/apk/res-auto"    android:id="@+id/topBar"    android:layout_width="match_parent"    android:layout_height="wrap_content"    android:layout_alignParentTop="true"    app:center_icon="@mipmap/ic_search"    app:center_text="输入关键字检索"    app:center_text_size="10sp"    app:left_icon="@mipmap/ic_scan"    app:left_text="扫一扫"    app:right_icon="@mipmap/ic_msg"    app:right_text="消息"    app:side_text_size="6sp"    app:text_color="#ffff">  </com.brioa.diyviewtest.view.TopBar>

mTopBar = (TopBar) findViewById(R.id.topBar);    mTopBar.setOnClick(new TopBar.onClick() {      @Override      public void onLeftButtonClick() {        Toast.makeText(mContext, "LeftClick", Toast.LENGTH_SHORT).show();      }      @Override      public void onCenterButtonClick() {        Toast.makeText(mContext, "CenterClick", Toast.LENGTH_SHORT).show();      }      @Override      public void onRightButtonClick() {        Toast.makeText(mContext, "RightClick", Toast.LENGTH_SHORT).show();      }    });