android textview动态设置drawabletop,android TextView 设置Drawable的大小

电玩女神 2022-10-16 07:33 356阅读 0赞

在项目中，经常会遇到文字旁边是图片的UI，使用LinearLayout布局显得非常累赘，且会影响性能，最明智的方法是自定义一个TextView，实现方法如下：

public class TextDrawable extends android.support.v7.widget.AppCompatTextView \{

private Drawable drawableLeft;

private Drawable drawableRight;

private Drawable drawableTop;

private int leftWidth;

private int rightWidth;

private int topWidth;

private int leftHeight;

private int rightHeight;

private int topHeight;

private Context mContext;

public TextDrawable(Context context) \{

super(context);

this.mContext = context;

init(context, null);

public TextDrawable(Context context, AttributeSet attrs) \{

super(context, attrs);

this.mContext = context;

init(context, attrs);

public TextDrawable(Context context, AttributeSet attrs, int defStyleAttr) \{

super(context, attrs, defStyleAttr);

this.mContext = context;

init(context, attrs);

private void init(Context context, AttributeSet attrs) \{

TypedArray typedArray = context.obtainStyledAttributes(attrs, R.styleable.TextDrawable);

drawableLeft = typedArray.getDrawable(R.styleable.TextDrawable\_leftDrawable);

drawableRight = typedArray.getDrawable(R.styleable.TextDrawable\_rightDrawable);

drawableTop = typedArray.getDrawable(R.styleable.TextDrawable\_topDrawable);

if (drawableLeft != null) \{

leftWidth = typedArray.getDimensionPixelOffset(R.styleable.TextDrawable\_leftDrawableWidth, dip2px(context, 20));

leftHeight = typedArray.getDimensionPixelOffset(R.styleable.TextDrawable\_leftDrawableHeight, dip2px(context, 20));

if (drawableRight != null) \{

rightWidth = typedArray.getDimensionPixelOffset(R.styleable.TextDrawable\_rightDrawableWidth, dip2px(context, 20));

rightHeight = typedArray.getDimensionPixelOffset(R.styleable.TextDrawable\_rightDrawableHeight, dip2px(context, 20));

if (drawableTop != null) \{

topWidth = typedArray.getDimensionPixelOffset(R.styleable.TextDrawable\_topDrawableWidth, dip2px(context, 20));

topHeight = typedArray.getDimensionPixelOffset(R.styleable.TextDrawable\_topDrawableHeight, dip2px(context, 20));

public int dip2px(Context context, float dpValue) \{

final float scale = context.getResources().getDisplayMetrics().density;

return (int) (dpValue \* scale + 0.5f);

@Override

protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) \{

super.onMeasure(widthMeasureSpec, heightMeasureSpec);

if (drawableLeft != null) \{

drawableLeft.setBounds(0, 0, leftWidth, leftHeight);

if (drawableRight != null) \{

drawableRight.setBounds(0, 0, rightWidth, rightHeight);

if (drawableTop != null) \{

drawableTop.setBounds(0, 0, topWidth, topHeight);

@Override

protected void onDraw(Canvas canvas) \{

super.onDraw(canvas);

this.setCompoundDrawables(drawableLeft, drawableTop, drawableRight, null);

/\*\*

\* 设置左侧图片并重绘

\*/

public void setDrawableLeft(Drawable drawableLeft) \{

this.drawableLeft = drawableLeft;

invalidate();

/\*\*

\* 设置左侧图片并重绘

\*/

public void setDrawableLeft(int drawableLeftRes) \{

this.drawableLeft = mContext.getResources().getDrawable(drawableLeftRes);

invalidate();

/\*\*

\* 设置右侧图片并重绘

\*/

public void setDrawableRight(Drawable drawableRight) \{

this.drawableRight = drawableLeft;

invalidate();

/\*\*

\* 设置右侧图片并重绘

\*/

public void setDrawableRight(int drawableRightRes) \{

this.drawableRight = mContext.getResources().getDrawable(drawableRightRes);

invalidate();

/\*\*

\* 设置上部图片并重绘

\*/

public void setDrawable(Drawable drawableTop) \{

this.drawableTop = drawableTop;

invalidate();

/\*\*

\* 设置右侧图片并重绘

\*/

public void setDrawableTop(int drawableTopRes) \{

this.drawableTop = mContext.getResources().getDrawable(drawableTopRes);

invalidate();

其中attrs.xml中属性定义如下：

在xml中使用方法如下：

android:layout\_width="0dp"

android:layout\_height="wrap\_content"

android:layout\_weight="1"

android:drawablePadding="17dp"

android:gravity="center"

android:text="@string/xxx"

android:textSize="16dp"

app:topDrawable="@mipmap/xxx"

app:topDrawableHeight="67dp"

app:topDrawableWidth="67dp" />

android textview动态设置drawabletop,android TextView 设置Drawable的大小

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