android TextView 设置部分文本 边框和样式

1 继承之后在绘制函数中处理

package com.test.withborderstextview;

import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.RectF;
import android.util.AttributeSet;
import android.widget.TextView;

/**
 * Created by lp on 2016/9/21.
 */
public class TextViewBorder extends TextView {
    private static final int STROKE_WIDTH = 2;
    private int borderCol;

    private Paint borderPaint;

    public TextViewBorder(Context context, AttributeSet attrs) {
        super(context, attrs);

        TypedArray a = context.getTheme().obtainStyledAttributes(attrs,
                R.styleable.TextViewBorder, 0, 0);
        try {
            borderCol = a.getInteger(R.styleable.TextViewBorder_borderColor, 0);//0 is default
        } finally {
            a.recycle();
        }

        borderPaint = new Paint();
        borderPaint.setStyle(Paint.Style.STROKE);
        borderPaint.setStrokeWidth(STROKE_WIDTH);
        borderPaint.setAntiAlias(true);
    }

    @Override
    protected void onDraw(Canvas canvas) {

        if (0 == this.getText().toString().length())
            return;

        borderPaint.setColor(borderCol);


        int w = this.getMeasuredWidth();
        int h = this.getMeasuredHeight();

        RectF r = new RectF(2, 2, w - 2, h - 2);
        canvas.drawRoundRect(r, 5, 5, borderPaint);
        super.onDraw(canvas);
    }

    public int getBordderColor() {
        return borderCol;
    }

    public void setBorderColor(int newColor) {
        borderCol = newColor;
        invalidate();
        requestLayout();
    }

}

其中的style在style.xml中有定义

 <declare-styleable name="TextViewBorder">
        <attr name="borderColor" format="color"/>
    </declare-styleable>

接下来就看看怎么引用：这里需要注意引入 xmlns:app=”http://schemas.android.com/apk/res-auto”
activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <com.test.withborderstextview.TextViewBorder
        android:id="@+id/state1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:gravity="center"
        android:padding="3dp"
        android:layout_margin="10dp"
        android:text="状态1(xml设置)"
        android:textColor="@color/app_blue_color"
        app:borderColor="@color/app_blue_color" />

    <com.test.withborderstextview.TextViewBorder
        android:id="@+id/state2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:gravity="center"
        android:padding="3dp"
        android:layout_margin="10dp"
        android:text="状态2(java代码动态更改)"
        android:textColor="@color/app_blue_color"
        app:borderColor="@color/app_blue_color" />

    <com.test.withborderstextview.TextViewBorder
        android:id="@+id/state3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:gravity="center"
        android:padding="3dp"
        android:layout_margin="10dp"
        android:text="状态3(java代码动态更改)"
        android:textColor="@color/app_blue_color"
        app:borderColor="@color/app_blue_color" />

    <com.test.withborderstextview.TextViewBorder
        android:id="@+id/state4"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:gravity="center"
        android:layout_margin="10dp"
        android:padding="3dp"
        android:text="状态4(java代码动态更改)"
        android:textColor="@color/app_blue_color"
        app:borderColor="@color/app_blue_color" />
</LinearLayout>

最后我们来看看怎么在代码中动态更改边框以及字体颜色
MainActivity.java

package com.test.withborderstextview;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;

public class MainActivity extends AppCompatActivity {

    private TextViewBorder state1;
    private TextViewBorder state2;
    private TextViewBorder state3;
    private TextViewBorder state4;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        state1 = (TextViewBorder) findViewById(R.id.state1);
        state2 = (TextViewBorder) findViewById(R.id.state2);
        state3 = (TextViewBorder) findViewById(R.id.state3);
        state4 = (TextViewBorder) findViewById(R.id.state4);

        //边框颜色
        state2.setBorderColor(getResources().getColor(R.color.app_red_delete_color));
        //字体颜色
        state2.setTextColor(getResources().getColor(R.color.app_red_delete_color));

        state3.setBorderColor(getResources().getColor(R.color.app_blue_color));
        state3.setTextColor(getResources().getColor(R.color.progress_color));

        state4.setBorderColor(getResources().getColor(R.color.app_red_delete_color));
        state4.setTextColor(getResources().getColor(R.color.app_blue_color));
    }
}

2 直接通过SpannableString 绘制修改

SpannableString msp = new SpannableString("默认");
            Drawable bg = context.getResources().getDrawable(R.drawable.default_address_tv);
            bg.setBounds(0, (int) Utils.applyDimension(3, -7, context), (int) Utils.applyDimension(3, msp.length() + 34, context), (int) Utils.applyDimension(3, 10, context));
            msp.setSpan(new ImageSpan(bg) {
                @Override
                public void draw(Canvas canvas, CharSequence text, int start, int end, float x, int top, int y,
                                 int bottom, Paint paint) {
                    int len = Math.round(paint.measureText(text, start, end));
                    getDrawable().setBounds(0, (int) Utils.applyDimension(3, -7, context), (int) Utils.applyDimension(3, msp.length() + 34, context), (int) Utils.applyDimension(3, 10, context));
                    super.draw(canvas, text, start, end, x, top, y, bottom, paint);
                    paint.setColor(context.getResources().getColor(R.color.color_7dbffa));
//                    paint.setTypeface(Typeface.create("normal", Typeface.BOLD));
                    paint.setTextSize(Utils.applyDimension(3, 12, context));
                    canvas.drawText(text.subSequence(start, end).toString(), Utils.applyDimension(3, x + 6, context), y, paint); // 绘制文本
                }
            }, 0, msp.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
            holder.tvAddress.setText(msp);
            SpannableString msp2 = new SpannableString("  " + address);
            holder.tvAddress.append(msp2);