View、Text、Button的drawableLeft左側圖片自定義大小

設置工具類

public class ImageTextButton extends android.support.v7.widget.AppCompatTextView {

    private Drawable drawableLeft;
    private int scaleWidth; //dp值
    private int scaleHeight;

    public ImageTextButton(Context context) {
        super(context);
    }

    public ImageTextButton(Context context, AttributeSet attrs) {
        super(context, attrs);
        init(context,attrs);
    }

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

    public void init(Context context, AttributeSet attrs) {
        TypedArray typedArray = context.obtainStyledAttributes(attrs, R.styleable.ImageTextButton);

        drawableLeft = typedArray.getDrawable(R.styleable.ImageTextButton_leftDrawable);
        scaleWidth = typedArray.getDimensionPixelOffset(R.styleable
                .ImageTextButton_drawableWidth, UIUtils.dp2px(getContext(),20));
        scaleHeight = typedArray.getDimensionPixelOffset(R.styleable
                .ImageTextButton_drawableHeight, UIUtils.dp2px(getContext(),20));
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
        if (drawableLeft != null) {
            drawableLeft.setBounds(0, 0, UIUtils.dp2px(getContext(),scaleWidth), UIUtils.dp2px(getContext(),scaleHeight));
        }
    }

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        this.setCompoundDrawables(drawableLeft, null, null, null);
    }

    /**
     * 設置左側圖片並重繪
     * @param drawableLeft
     */
    public void setDrawableLeft(Drawable drawableLeft) {
        this.drawableLeft = drawableLeft;
        invalidate();
    }

    /**
     * 設置左側圖片並重繪
     * @param drawableLeftRes
     */
    public void setDrawableLeft(int drawableLeftRes) {
        this.drawableLeft = UIUtils.getContext().getResources().getDrawable(drawableLeftRes);
        invalidate();
    }
}

 

附上attrs：

<!-- ImageTextButton attrs-->
<attr name="leftDrawable" format="reference"/>
<attr name="drawableWidth" format="dimension"/>
<attr name="drawableHeight" format="dimension"/>

<declare-styleable name="ImageTextButton">
    <attr name="leftDrawable"/>
    <attr name="drawableWidth"/>
    <attr name="drawableHeight"/>
</declare-styleable>

 

最後在xml中調用便可，讓咱們看一下效果

<com.guorentong.learn.organ.utils.ImageTextButton
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:drawablePadding="5dp"
    android:text="課程時長"
    android:textColor="@color/colorText"
    android:textSize="30px"
    app:drawableHeight="20px"
    app:drawableWidth="6px"
    app:leftDrawable="@drawable/lantiao" />

 

尺寸轉化類

public class UIUtils {
    public static Context getContext() {
        return MyApp.getInstance();
    }
    /**
     * 獲取資源對象
     */
    public static Resources getResources() {
        return getContext().getResources();
    }
    /**
     * 獲取資源文件字符串
     *
     * @param id
     * @return
     */
    public static String getString(int id) {
        return getResources().getString(id);
    }
    /**
     * 獲取資源文件字符串數組
     *
     * @param id
     * @return
     */
    public static String[] getStringArray(int id) {
        return getResources().getStringArray(id);
    }
    /**
     * 獲取資源文件圖片
     *
     * @param id
     * @return
     */
    public static Drawable getDrawable(int id) {
        return ContextCompat.getDrawable(getContext(), id);
    }
    /**
     * 獲取資源文件顏色
     *
     * @param id
     * @return
     */
    public static int getColor(int id) {
        return ContextCompat.getColor(getContext(), id);
    }
    /**
     * 根據id獲取顏色的狀態選擇器
     *
     * @param id
     * @return
     */
    public static ColorStateList getColorStateList(int id) {
        return ContextCompat.getColorStateList(getContext(), id);
    }
    /**
     * 獲取尺寸
     *
     * @param id
     * @return
     */
    public static int getDimen(int id) {
        return getResources().getDimensionPixelSize(id); // 返回具體像素值
    }
    /**
     * dp轉px
     */
    public static int dp2px(Context context, float dpVal) {
        return (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP,
                dpVal, context.getResources().getDisplayMetrics());
    }



    /**
     * px -> dp
     *
     * @param px
     * @return
     */
    public static float px2dp(int px) {
        float density = getResources().getDisplayMetrics().density;
        return px / density;
    }
    /**
     * 加載佈局文件
     *
     * @param id
     * @return
     */
    public static View inflate(int id) {
        return View.inflate(getContext(), id, null);
    }
    /**
     * 把自身從父View中移除
     * @param view
     */
    public static void removeSelfFromParent(View view) {
        if (view != null) {
            ViewParent parent = view.getParent();
            if (parent != null && parent instanceof ViewGroup) {
                ViewGroup group = (ViewGroup) parent;
                group.removeView(view);
            }
        }
    }
    /**
     * 請求View樹從新佈局，用於解決中層View有佈局狀態而致使上層View狀態斷裂
     * @param view
     * @param isAll
     */
    public static void requestLayoutParent(View view, boolean isAll) {
        ViewParent parent = view.getParent();
        while (parent != null && parent instanceof View) {
            if (!parent.isLayoutRequested()) {
                parent.requestLayout();
                if (!isAll) {
                    break;
                }
            }
            parent = parent.getParent();
        }
    }
    /**
     * 判斷觸點是否落在該View上
     * @param ev
     * @param v
     * @return
     */
    public static boolean isTouchInView(MotionEvent ev, View v) {
        int[] vLoc = new int[2];
        v.getLocationOnScreen(vLoc);
        float motionX = ev.getRawX();
        float motionY = ev.getRawY();
        return motionX >= vLoc[0] && motionX <= (vLoc[0] + v.getWidth())
                && motionY >= vLoc[1] && motionY <= (vLoc[1] + v.getHeight());
    }
    /**
     * findViewById的泛型封裝，減小強轉代碼
     * @param layout
     * @param id
     * @param <T>
     * @return
     */
    public static <T extends View> T findViewById(View layout, int id) {
        return (T) layout.findViewById(id);
    }
    /**
     * 獲取屏幕的比例
     * @param context
     * @return
     */
    public static float getScaledDensity(Context context) {
        DisplayMetrics dm = context.getResources().getDisplayMetrics();
        float value = dm.scaledDensity;
        return value;
    }
    /**
     * 獲取控件的高度，若是獲取的高度爲0，則從新計算尺寸後再返回高度
     * @param view
     * @return
     */
    public static int getViewMeasuredHeight(View view) {
        calcViewMeasure(view);
        return view.getMeasuredHeight();
    }
    /**
     * 獲取控件的寬度，若是獲取的寬度爲0，則從新計算尺寸後再返回寬度
     * @param view
     * @return
     */
    public static int getViewMeasuredWidth(View view) {
        calcViewMeasure(view);
        return view.getMeasuredWidth();
    }
    /**
     * 測量控件的尺寸
     * @param view
     */
    public static void calcViewMeasure(View view) {
        int width = View.MeasureSpec.makeMeasureSpec(0,
                View.MeasureSpec.UNSPECIFIED);
        int expandSpec = View.MeasureSpec.makeMeasureSpec(
                Integer.MAX_VALUE >> 2, View.MeasureSpec.AT_MOST);
        view.measure(width, expandSpec);
    }
    /**
     * 設置textview指定文字爲某一顏色
     *
     * @param content 顯示的文字
     * @param color   須要轉換成的顏色值
     * @param start   須要變色文字開始位置
     * @param end     須要變色文字結束位置
     */
    public static SpannableStringBuilder changeTextColor(String content, int color, int start, int end) {
        SpannableStringBuilder spannableStringBuilder = new SpannableStringBuilder(content);
        spannableStringBuilder.setSpan(new ForegroundColorSpan(color), start, end, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
        return spannableStringBuilder;
    }
}

drawable樣式文件

<shape xmlns:android="http://schemas.android.com/apk/res/android">

    <!--顏色-->
    <solid android:color="@color/colorAccent"/>
    <!--內邊距-->
    <!--<padding-->
    <!--android:bottom="20dp"-->
    <!--android:left="20dp"-->
    <!--android:right="20dp"-->
    <!--android:top="20dp"/>-->

    <corners android:topLeftRadius="10dp"
        android:topRightRadius="10dp"
        android:bottomRightRadius="10dp"
        android:bottomLeftRadius="10dp"/>
    <!--設置圓角-->
    <corners android:radius="10dip"/>
    <!--stroke設置描邊-->
    <!--<stroke-->
    <!--android:width="2dp"-->
    <!--android:color="@android:color/darker_gray"/>-->
</shape>