目录

1、效果展示：

2、代码展示：

2.1、BorderedText.java

2.2、DrawRectFView.java

2.3、xml

2.4、DrawRectFActivity.java

1、效果展示：

2、代码展示：

2.1、BorderedText.java

 public class BorderedText {   private final Paint interiorPaint;   private final Paint exteriorPaint;    private final float textSize;    /**    * Creates a left-aligned bordered text object with a white interior, and a black exterior with    * the specified text size.    *    * @param textSize text size in pixels    */   public BorderedText(final float textSize) {     this(Color.WHITE, Color.BLACK, textSize);   }    /**    * Create a bordered text object with the specified interior and exterior colors, text size and    * alignment.    *    * @param interiorColor the interior text color    * @param exteriorColor the exterior text color    * @param textSize text size in pixels    */   public BorderedText(final int interiorColor, final int exteriorColor, final float textSize) {     interiorPaint = new Paint();     interiorPaint.setTextSize(textSize);     interiorPaint.setColor(interiorColor);     interiorPaint.setStyle(Style.FILL);     interiorPaint.setAntiAlias(false);     interiorPaint.setAlpha(255);      exteriorPaint = new Paint();     exteriorPaint.setTextSize(textSize);     exteriorPaint.setColor(exteriorColor);     exteriorPaint.setStyle(Style.FILL_AND_STROKE);     exteriorPaint.setStrokeWidth(textSize / 8);     exteriorPaint.setAntiAlias(false);     exteriorPaint.setAlpha(255);      this.textSize = textSize;   }    public void setTypeface(Typeface typeface) {     interiorPaint.setTypeface(typeface);     exteriorPaint.setTypeface(typeface);   }    public void drawText(final Canvas canvas, final float posX, final float posY, final String text) {     canvas.drawText(text, posX, posY, exteriorPaint);     canvas.drawText(text, posX, posY, interiorPaint);   }    public void drawText(           final Canvas canvas, final float posX, final float posY, final String text, Paint bgPaint) {      float width = exteriorPaint.measureText(text);     float textSize = exteriorPaint.getTextSize();     Paint paint = new Paint(bgPaint);     paint.setStyle(Style.FILL);     paint.setAlpha(160);     canvas.drawRect(posX, (posY + (int) (textSize)), (posX + (int) (width)), posY, paint);      canvas.drawText(text, posX, (posY + textSize), interiorPaint);   }    public void drawLines(Canvas canvas, final float posX, final float posY, Vector<String> lines) {     int lineNum = 0;     for (final String line : lines) {       drawText(canvas, posX, posY - getTextSize() * (lines.size() - lineNum - 1), line);       ++lineNum;     }   }    public void setInteriorColor(final int color) {     interiorPaint.setColor(color);   }    public void setExteriorColor(final int color) {     exteriorPaint.setColor(color);   }    public float getTextSize() {     return textSize;   }    public void setAlpha(final int alpha) {     interiorPaint.setAlpha(alpha);     exteriorPaint.setAlpha(alpha);   }    public void getTextBounds(           final String line, final int index, final int count, final Rect lineBounds) {     interiorPaint.getTextBounds(line, index, count, lineBounds);   }    public void setTextAlign(final Align align) {     interiorPaint.setTextAlign(align);     exteriorPaint.setTextAlign(align);   } }

2.2、DrawRectFView.java

 public class DrawRectFView extends View {      // 绘制 损害框和损害名称     private Paint mPaint;     private RectF mRectF;      // 边缘字体     private BorderedText mBorderedText;      // 标题 或 名字     private String mTitle;     // 概率     private float mConfidence;      public DrawRectFView(Context context, @Nullable AttributeSet attrs) {         super(context, attrs);          mPaint = new Paint();         mRectF = new RectF();          //画笔设置空心         mPaint.setStyle(Paint.Style.STROKE);         mPaint.setColor(Color.RED);         mPaint.setStrokeWidth(5);          float textSizePx = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP,                 18.0f, context.getResources().getDisplayMetrics());         mBorderedText = new BorderedText(textSizePx);     }      // 设置矩形框     public void setRectF(RectF rectf) {         this.mRectF = rectf;     }      public void setTitle(String title) {         mTitle = title;     }      public void setConfidence(float confidence) {         mConfidence = confidence;     }      @Override     protected void onDraw(Canvas canvas) {         super.onDraw(canvas);          // 绘制 损害框         float cornerSize = Math.min(mRectF.width(), mRectF.height()) / 8.0f;         canvas.drawRoundRect(mRectF, cornerSize, cornerSize, mPaint);          // 绘制  损害名称 //        if (!TextUtils.isEmpty(mTitle)){ //            mBorderedText.drawText(canvas, mRectF.left + cornerSize, //                    mRectF.top, mTitle, mPaint); //        }else { //            LogUtils.d("mTitle is null or empty!"); //        }          // 绘制名称 和 概率         final String labelString =                 !TextUtils.isEmpty(mTitle)                         ? String.format("%s %.2f",mTitle, (100 * mConfidence))                         : String.format("%.2f", (100 * mConfidence));          mBorderedText.drawText(canvas,                 mRectF.left + cornerSize,                 mRectF.top, labelString + "%",                 mPaint);      }  }

2.3、xml

 <?xml version="1.0" encoding="utf-8"?> <android.support.constraint.ConstraintLayout     xmlns:android="https://schemas.android.com/apk/res/android"     xmlns:tools="https://schemas.android.com/tools"     android:layout_width="match_parent"     android:layout_height="match_parent"     tools:context="com.gs.common3.aView.customView.drawRectF.DrawRectFActivity">      <ImageView         android:id="@+id/ivBackGround"         android:layout_width="match_parent"         android:layout_height="match_parent"         android:background="@mipmap/road_details_bg" />      <com.gs.common3.aView.customView.drawRectF.DrawRectFView         android:id="@+id/drawRectfView"         android:layout_width="match_parent"         android:layout_height="match_parent" />  </android.support.constraint.ConstraintLayout>

2.4、DrawRectFActivity.java

 /**  * 在已有图片上画一个矩形识别框  */ public class DrawRectFActivity extends AppCompatActivity {      @BindView(R.id.ivBackGround)     ImageView ivBackGround;     @BindView(R.id.drawRectfView)     DrawRectFView drawRectfView;      @Override     protected void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         setContentView(R.layout.activity_draw_rect_f);         ButterKnife.bind(this);          RectF rectF = new RectF(650, 100, 1200, 1200);         // RectF(118.33958, 45.164707, 299.81873, 282.58585)         RectF rectF2 = new RectF(118.33958f, 45.164707f, 299.81873f, 282.58585f);         // RectF(66.426094, 45.78909, 112.51868, 125.75089)         RectF rectF3 = new RectF(66.426094f, 45.78909f, 112.51868f, 125.75089f);          //  RectF(301.6704, 90.27226, 1366.7053, 1402.4152)         RectF rectF4 = new RectF(301.6704f, 90.27226f, 1366.7053f, 1402.4152f);           drawRectfView.setRectF(rectF4);         drawRectfView.setTitle("网状裂缝");         drawRectfView.setConfidence(0.8f);      }  }