Android Imageview 图片居左居右,自定义圆角

android:scaleType="fitStart"    图片靠左不变形显示,

android:scaleType=”fitEnd”  图片靠右显示,不变形.

半透明android:background="#e0000000"   透明 android:background="#00000000"

//  自定义TextView  圆角边框

package com.klgz.app.ui.widgets;

import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Rect;
import android.graphics.RectF;
import android.util.AttributeSet;
import android.util.TypedValue;
import android.view.View;

import com.klgz.app.gentleman.lt.R;

/**
 * Created by Administrator on 2017/11/29.
 * 自定义圆角图片
 *
 */

public class ColorTextView extends View {

    /**
     * 文本内容
     */
    private String mTitleText;
    /**
     * 文本的颜色
     */
    private int mTitleTextColor;
    /**
     * 文本的大小
     */
    private int mTitleTextSize;

    private int ctvBackgroundColor;

    /**
     * 圆角大小
     */
    private int mCornerSize;

    /**
     * 绘制时控制文本绘制的范围
     */
    private Rect mtitleBound;
    private Paint mtitlePaint;

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

    public ColorTextView(Context context) {
        this(context, null);
    }

    public void setCtvBackgroundColor(int ctvBackgroundColor) {
        this.ctvBackgroundColor = ctvBackgroundColor;
    }

    /**
     * 获得我自定义的样式属性
     *
     * @param context
     * @param attrs
     * @param defStyle
     */
    public ColorTextView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);

        /**
         * 获得我们所定义的自定义样式属性
         */
        TypedArray a = context.getTheme().obtainStyledAttributes(attrs, R.styleable.ColorTextView, defStyle, 0);
        int n = a.getIndexCount();
        for (int i = 0; i < n; i++) {
            int attr = a.getIndex(i);
            switch (attr) {
                case R.styleable.ColorTextView_ctvText:
                    mTitleText = a.getString(attr);
                    break;
                case R.styleable.ColorTextView_ctvTextColor:
                    // 默认颜色设置为黑色
                    mTitleTextColor = a.getColor(attr, Color.BLACK);
                    break;
                case R.styleable.ColorTextView_ctvTextSize:
                    // 默认设置为16sp，TypeValue也可以把sp转化为px
                    mTitleTextSize = a.getDimensionPixelSize(attr, (int) TypedValue.applyDimension(
                            TypedValue.COMPLEX_UNIT_SP, 16, getResources().getDisplayMetrics()));
                    break;
                case R.styleable.ColorTextView_ctvBackground:
                    //默认为白色
                    ctvBackgroundColor = a.getColor(attr, Color.WHITE);
                    break;
                case R.styleable.ColorTextView_ctvCornerSize:
                    //默认圆角为0
                    mCornerSize = a.getInteger(attr, 0);
                    break;

            }

        }
        a.recycle();
        mtitlePaint = new Paint();
        mtitlePaint.setTextSize(mTitleTextSize);
        mtitleBound = new Rect();
        mtitlePaint.getTextBounds(mTitleText, 0, mTitleText.length(), mtitleBound);
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {

        int widthMode = MeasureSpec.getMode(widthMeasureSpec);
        int widthSize = MeasureSpec.getSize(widthMeasureSpec);
        int heightMode = MeasureSpec.getMode(heightMeasureSpec);
        int heightSize = MeasureSpec.getSize(heightMeasureSpec);
        int width;
        int height;
        if (widthMode == MeasureSpec.EXACTLY) {
            width = widthSize;
        } else {
            mtitlePaint.setTextSize(mTitleTextSize);
            mtitlePaint.getTextBounds(mTitleText, 0, mTitleText.length(), mtitleBound);

            int desired = getPaddingLeft() + mtitleBound.width() + getPaddingRight();
            width = desired <= widthSize ? desired : widthSize;
        }

        if (heightMode == MeasureSpec.EXACTLY) {
            height = heightSize;
        } else {
            mtitlePaint.setTextSize(mTitleTextSize);
            mtitlePaint.getTextBounds(mTitleText, 0, mTitleText.length(), mtitleBound);
            int desired = getPaddingTop() + mtitleBound.height() + getPaddingBottom();
            height = desired <= heightSize ? desired : heightSize;
        }
        setMeasuredDimension(width, height);
    }

    @Override
    protected void onDraw(Canvas canvas) {

        Paint paint = new Paint(Paint.FILTER_BITMAP_FLAG);
        paint.setAntiAlias(true);
        paint.setColor(ctvBackgroundColor);
        RectF rec = new RectF(0, 0, getMeasuredWidth(), getMeasuredHeight());
        canvas.drawRoundRect(rec, mCornerSize, mCornerSize, paint);

        mtitlePaint.setColor(mTitleTextColor);
        Paint.FontMetricsInt fontMetrics = mtitlePaint.getFontMetricsInt();
        int baseline = (getMeasuredHeight() - fontMetrics.bottom + fontMetrics.top) / 2 - fontMetrics.top;
        canvas.drawText(mTitleText, getPaddingLeft(), baseline, mtitlePaint);
    }
}

//  资源  文件

<!--自定义圆角换背景色色块-->
    <declare-styleable name="ColorTextView">
        <attr name="ctvText" format="string" />
        <attr name="ctvBackground" format="color"/>
        <attr name="ctvTextSize" format="dimension"/>
        <attr name="ctvTextColor" format="color"/>
        <attr name="ctvCornerSize" format="integer"/>
    </declare-styleable>

<com.klgz.app.ui.widgets.ColorTextView
    android:id="@+id/t_sk"
    android:layout_width="25dp"
    android:layout_height="25dp"
    android:layout_marginLeft="5dp"
    android:layout_marginRight="5dp"

    radiostyle:ctvBackground="@color/zih"
    radiostyle:ctvCornerSize="10"
    radiostyle:ctvText="色"
    radiostyle:ctvTextColor="@color/white"
    radiostyle:ctvTextSize="15sp"
    />

//改变颜色方法

t_bj.setCtvBackgroundColor(getResources().getColor(R.color.huang));