TextView中DrawableXXX图片无法设置大小的解决方案

在开发过程中我们往往会遇到图片旁边带文字的布局，这种布局有些比较Low的开发会直接用一个ImageView和TextView，有经验的会给TextView设置DrawableLeft、DrawableRight等等属性，一个View搞定，但是这个属性设置图片是无法控制大小的，在xml里面，当然在Java代码里是可以设置的。

        TextView textView = new TextView(mContext);
        Drawable drawable = getResources().getDrawable(R.drawable.icon_friend);
        // 设置图片的大小
        drawable.setBounds(0, 0, 20, 20);
        // 设置图片的位置，左、上、右、下
        textView.setCompoundDrawables(null, null, drawable, null);

当然，我们还可以用自定义View来实现这个效果，代码也是非常的简单

import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.drawable.Drawable;
import android.support.annotation.Nullable;
import android.util.AttributeSet;
import com.rzj.zhongshi.R;

public class DrawableTextView extends android.support.v7.widget.AppCompatTextView {
    private Drawable drawableLeft = null, drawableTop = null, drawableRight = null,
     drawableBottom = null;
    private int drawableWidth, drawableHeight;
    public DrawableTextView(Context context) {
        this(context, null);
    }

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

    public DrawableTextView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        TypedArray typedArray = context.obtainStyledAttributes(attrs, R.styleable.DrawableTextView);
        int count = typedArray.getIndexCount();
        for(int i = 0; i < count; i++){
            int attr = typedArray.getIndex(i);
            switch (attr){
                case R.styleable.DrawableTextView_drawableRight:
                    drawableRight = typedArray.getDrawable(attr);
                    break;
                case R.styleable.DrawableTextView_drawableLeft:
                    drawableLeft = typedArray.getDrawable(attr);
                    break;
                case R.styleable.DrawableTextView_drawableTop:
                    drawableTop = typedArray.getDrawable(attr);
                    break;
                case R.styleable.DrawableTextView_drawableBottom:
                    drawableBottom = typedArray.getDrawable(attr);
                    break;
                case R.styleable.DrawableTextView_drawableWidth:
                    drawableWidth = typedArray.getDimensionPixelSize(attr, 0);
                    break;
                case R.styleable.DrawableTextView_drawableHeight:
                    drawableHeight = typedArray.getDimensionPixelSize(attr,0);
                    break;
            }
        }
        if(null != drawableLeft){
            drawableLeft.setBounds(0,0, drawableWidth, drawableHeight);
        }
        if(null != drawableRight){
            drawableRight.setBounds(0,0, drawableWidth, drawableHeight);
        }
        if(null != drawableTop){
            drawableTop.setBounds(0,0, drawableWidth, drawableHeight);
        }
        if(null != drawableBottom){
            drawableBottom.setBounds(0,0, drawableWidth, drawableHeight);
        }
        setCompoundDrawables(drawableLeft, drawableTop, drawableRight, drawableBottom);
    }

}