Android 自定义 View-如何设置TextView dr

项目中经常需要设置 drawable 大小,但是可惜 textView 并不支持

手摸手,三分钟动手造轮子:

支持 任意 Drawable,不限于图片, XML,layer,再也不怕产品的各种奇葩需求了

1. 创建自定义的 View

public class DrawableTextView extends AppCompatTextView {
//设置方向
public static final int LEFT = 1, TOP = 2, RIGHT = 3, BOTTOM = 4;
  public DrawableTextView(Context context) {
    this(context, null);
  }

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

  public DrawableTextView(Context context, AttributeSet attrs, 
    int defStyleAttr) {
    super(context, attrs, defStyleAttr);
    init(attrs);
  }
}

2. 在 attrs.xml设置自定义属性:

<declare-styleable name="DrawableTextView">
    <attr name="drawable_src" format="reference"/>
    <attr name="drawable_height" format="dimension"/>
    <attr name="drawable_width" format="dimension"/>
    <attr name="drawable_location">
      <enum name="left" value="1"/>
      <enum name="top" value="2"/>
      <enum name="right" value="3"/>
      <enum name="bottom" value="4"/>
    </attr>
  </declare-styleable>

3. 解析自定义属性

  private void init(AttributeSet attrs) {
    if (attrs != null) {
      TypedArray a = getContext().obtainStyledAttributes(attrs,             R.styleable.DrawableTextView);
      int mWidth = a.getDimensionPixelSize
        (R.styleable.DrawableTextView_drawable_width, 0);
      int mHeight =a.getDimensionPixelSize
        (R.styleable.DrawableTextView_drawable_height,0);
      Drawable mDrawable =a.getDrawable
        (R.styleable.DrawableTextView_drawable_src);
      int mLocation = a.getInt
        (R.styleable.DrawableTextView_drawable_location, LEFT);
      a.recycle();
      drawDrawable(mDrawable, mWidth, mHeight, mLocation);
    }
  }

4. 给 Drawable 设置好 参数

   /**
      * 绘制Drawable宽高,位置
      */
     public void drawDrawable(Drawable mDrawable, int mWidth,           int mHeight, int mLocation) {
       if (mDrawable != null) {
         if (mWidth != 0 && mHeight != 0) {
           mDrawable.setBounds(0, 0, mWidth, mHeight);
         }
         switch (mLocation) {
           case LEFT:
             this.setCompoundDrawables(mDrawable, null,
                 null, null);
             break;
           case TOP:
             this.setCompoundDrawables(null, mDrawable,
                 null, null);
             break;
           case RIGHT:
             this.setCompoundDrawables(null, null,
                 mDrawable, null);
             break;
           case BOTTOM:
             this.setCompoundDrawables(null, null, null,
                 mDrawable);
             break;
         }
       }
     }
   

5. 最后,使用:

   <com.mrwang.gifstudio.View.DrawableTextView
       android:id="@+id/view"
       android:layout_width="wrap_content"
       android:layout_height="wrap_content"
       android:gravity="center"
       android:text="hahahah"
       app:drawable_src="@drawable/count_down"
       android:drawablePadding="10dp"
       app:drawable_height="50dp"
       app:drawable_width="50dp"
       app:drawable_location="right"/>
   

   ​

6. 贴上最终效果图:

7. 所有代码:

   public class DrawableTextView extends AppCompatTextView {
   
     public static final int LEFT = 1, TOP = 2, RIGHT = 3, BOTTOM = 4;
   
     public DrawableTextView(Context context) {
       this(context, null);
     }
   
     public DrawableTextView(Context context, AttributeSet attrs) {
       this(context, attrs, 0);
     }
   
     public DrawableTextView(Context context, AttributeSet attrs, int defStyleAttr) {
       super(context, attrs, defStyleAttr);
       init(attrs);
     }
   
     private void init(AttributeSet attrs) {
       if (attrs != null) {
         TypedArray a = getContext().obtainStyledAttributes(attrs, R.styleable.DrawableTextView);
         int mWidth = a
             .getDimensionPixelSize(R.styleable.DrawableTextView_drawable_width, 0);
         int mHeight = a.getDimensionPixelSize(R.styleable.DrawableTextView_drawable_height,
             0);
         Drawable mDrawable = a.getDrawable(R.styleable.DrawableTextView_drawable_src);
         int mLocation = a.getInt(R.styleable.DrawableTextView_drawable_location, LEFT);
         a.recycle();
         drawDrawable(mDrawable, mWidth, mHeight, mLocation);
       }
     }
   
     /**
      * 绘制Drawable宽高,位置
      */
     public void drawDrawable(Drawable mDrawable, int mWidth, int mHeight, int mLocation) {
       if (mDrawable != null) {
         if (mWidth != 0 && mHeight != 0) {
           mDrawable.setBounds(0, 0, mWidth, mHeight);
         }
         switch (mLocation) {
           case LEFT:
             this.setCompoundDrawables(mDrawable, null,
                 null, null);
             break;
           case TOP:
             this.setCompoundDrawables(null, mDrawable,
                 null, null);
             break;
           case RIGHT:
             this.setCompoundDrawables(null, null,
                 mDrawable, null);
             break;
           case BOTTOM:
             this.setCompoundDrawables(null, null, null,
                 mDrawable);
             break;
         }
       }
     }
   }
   

   ​参考:
   | http://blog.csdn.net/u014702653/article/details/52304656