最近根据项目需求自定义了一个TextView控件，主要用来做状态的标识，比如一个订单状态有各种，当然了这种设置在Android中可以直接用xml文件来处理，但是对于xml文件太过于麻烦，针对不同的颜色需要写一个xml文件，这样太繁琐了，所以就自己写了一个控件，只要动态设置一下属性就可以达到想要的目的，在此把这代码分享出来，当然了，也希望大家多多提意见，毕竟代码优化是一步一步跟进完善的，好了我们先来看看具体的效果图，毕竟有图才能看看是不是自己想要的那种控件，上图：

下面我们就来看看具体的实现吧

首先是自定义控件ColorTextView.java文件：

package com.test.colortextviewdemo;

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;

/**

* 自定义申请状态textView

*/

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);

}

}

其中自定义的style在attrs.xml文件中，具体看代码：

接下来我们就来看看是怎么使用的

activity_main.xml

xmlns:radiostyle="http://schemas.android.com/apk/res-auto"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:orientation="vertical">

android:layout_marginTop="15dp"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_gravity="center"

android:padding="5dp"

radiostyle:ctvBackground="@color/app_theme_color"

radiostyle:ctvCornerSize="30"

radiostyle:ctvText="我是原文本"

radiostyle:ctvTextColor="@color/app_white"

radiostyle:ctvTextSize="15sp" />

android:layout_marginTop="15dp"

android:id="@+id/text_0"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_gravity="center"

android:padding="5dp"

radiostyle:ctvBackground="@color/app_theme_color"

radiostyle:ctvCornerSize="30"

radiostyle:ctvText="我是自定义颜色文本1"

radiostyle:ctvTextColor="@color/app_white"

radiostyle:ctvTextSize="15sp" />

android:layout_marginTop="15dp"

android:id="@+id/text_1"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_gravity="center"

android:padding="5dp"

radiostyle:ctvBackground="@color/app_theme_color"

radiostyle:ctvCornerSize="30"

radiostyle:ctvText="我是自定义颜色文本2"

radiostyle:ctvTextColor="@color/app_white"

radiostyle:ctvTextSize="15sp" />

android:layout_marginTop="15dp"

android:id="@+id/text_2"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_gravity="center"

android:padding="5dp"

radiostyle:ctvBackground="@color/app_theme_color"

radiostyle:ctvCornerSize="30"

radiostyle:ctvText="我是自定义颜色文本3"

radiostyle:ctvTextColor="@color/app_white"

radiostyle:ctvTextSize="15sp" />

最后我们来看看是怎么在代码中改变背景颜色值的：

MainActivity.java

package com.test.colortextviewdemo;

import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;

public class MainActivity extends AppCompatActivity {

private ColorTextView ctv0;

private ColorTextView ctv1;

private ColorTextView ctv2;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

ctv0 = (ColorTextView) findViewById(R.id.text_0);

ctv1 = (ColorTextView) findViewById(R.id.text_1);

ctv2 = (ColorTextView) findViewById(R.id.text_2);

ctv0.setCtvBackgroundColor(getResources().getColor(R.color.progress_color));

ctv1.setCtvBackgroundColor(getResources().getColor(R.color.app_red));

ctv2.setCtvBackgroundColor(getResources().getColor(R.color.colorAccent));

}

}

好啦，使用就是这么简单，需要的可以在这个基础上进行完善，有什么好的建议可以给我留言，如果有需要的也可以点击下载源码：

Android自定义TextView带圆角及背景颜色