【Android】ImageView图片装饰 文字、水印、边框(94/100)
自定义装饰ImageView类:DecorateImageView
public class DecorateImageView extends ImageView {
private Paint mPaint=new Paint();
private int mWidth,mHeight;
private int mTextSize=30;
private String mText;//文字
private Bitmap mLogo;//水印
private Bitmap mFrame;//边框
public DecorateImageView(Context context) {
super(context);
}
public DecorateImageView(Context context, @Nullable AttributeSet attrs) {
super(context, attrs);
mPaint.setColor(Color.parseColor("#8800FF"));
mPaint.setTextSize(Utils.dp2px(context,mTextSize));
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
mWidth=getMeasuredWidth();
// mHeight=getMinimumHeight();
mHeight=300*2;
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
if(mFrame !=null){
canvas.drawBitmap(mFrame,null,new Rect(0,0,mWidth,mHeight),mPaint);
}
if(!TextUtils.isEmpty(mText)){
int textHeight= (int)MeasureUtil.getTextHeight(mText,mTextSize);
canvas.drawText(mText,0,Math.abs(mHeight-textHeight),mPaint);
}
if(null!=mLogo){
canvas.drawBitmap(mLogo,mWidth-mLogo.getWidth()
,mHeight-mLogo.getHeight()
,mPaint);
}
}
public void showNone(){
mText="";
mLogo=null;
mFrame=null;
postInvalidate();
}
public void showText(String text,boolean isReset){
if(isReset){
showNone();
}
mText=text;
postInvalidate();
}
public void showLogo(Bitmap bitmap,boolean isReset){
if(isReset){
showNone();
}
mLogo=bitmap;
postInvalidate();
}
public void showFrame(Bitmap bitmap,boolean isReset){
if(isReset){
showNone();
}
mFrame=bitmap;
postInvalidate();
}
}
布局如下:
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".activity.DecorateImageViewActivity">
<TextView
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
android:id="@+id/tv_label"
android:text="图像装饰类型:"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
<Spinner
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintStart_toEndOf="@id/tv_label"
app:layout_constraintEnd_toEndOf="parent"
android:id="@+id/spinner"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:spinnerMode="dialog"
/>
<top.lc951.myandroid.views.DecorateImageView
android:id="@+id/iv_decorate"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@id/tv_label"
android:layout_width="match_parent"
android:layout_height="300dp"
android:src="@mipmap/ic_img01"
android:scaleType="fitXY"
android:layout_margin="10dp"
/>
</android.support.constraint.ConstraintLayout>
Activity控制类
package top.lc951.myandroid.activity;
import android.content.Context;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Spinner;
import top.lc951.myandroid.R;
import top.lc951.myandroid.views.DecorateImageView;
/**
* 图片装饰 文字、水印、边框
* 参考:{@link DecorateImageView}
*/
public class DecorateImageViewActivity extends AppCompatActivity {
private DecorateImageView decorateImageView;
public static void actionActivity(Context context) {
Intent intent = new Intent(context, DecorateImageViewActivity.class);
context.startActivity(intent);
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_decorate_image_view);
decorateImageView=findViewById(R.id.iv_decorate);
initDecorateSpinner();
}
private String[] decorateNameArray = {"无装饰", "文字", "图片水印", "相框"};
private void initDecorateSpinner() {
ArrayAdapter<String> arrayAdapter=new ArrayAdapter<String>(this
,android.R.layout.simple_spinner_item
,decorateNameArray);
Spinner spinner=findViewById(R.id.spinner);
spinner.setPrompt("请选择装饰类型");
spinner.setAdapter(arrayAdapter);
spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
showResult(position);
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
}
});
spinner.setSelection(0);
}
private void showResult(int position) {
switch (position){
case 0:
decorateImageView.showNone();
break;
case 1:
decorateImageView.showText("@lichong951",true);
break;
case 2:
Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.mipmap.lichong951);
decorateImageView.showLogo(bitmap,true);
break;
case 3:
Bitmap frame = BitmapFactory.decodeResource(getResources(), R.mipmap.photo_frame3);
decorateImageView.showFrame(frame,true);
break;
default:
break;
}
}
}
工具类:
/**
* @author lichong
* 2022年07月25日14:48:47
*/
public class MeasureUtil {
/**
* 测量文字的宽度
* */
public static float measureTextWidth(String txt,int size){
Paint paint=new Paint();
paint.setTextSize(size);
return paint.measureText(txt);
}
public static Rect measureTextRectByBounds(String str){
Paint paint = new Paint();
Rect rect = new Rect();
paint.getTextBounds(str, 0, str.length(), rect);
int w = rect.width();
int h = rect.height();
return rect;
}
public static int measureTextWidthByBounds(String str){
return measureTextRectByBounds(str).width();
}
public static int measureTextHeightByBounds(String str){
return measureTextRectByBounds(str).height();
}
// 获取指定文本的高度
public static float getTextHeight(String text, float textSize) {
Paint paint = new Paint(); // 创建一个画笔对象
paint.setTextSize(textSize); // 设置画笔的文本大小
Paint.FontMetrics fm = paint.getFontMetrics(); // 获取画笔默认字体的度量衡
return fm.descent - fm.ascent; // 返回文本自身的高度
//return fm.bottom - fm.top + fm.leading; // 返回文本所在行的行高
}
扩展:
Canvas指画布,表现在屏幕上就是一块区域,可以在上面使用各种API绘制想要的东西
Canvas的坐标系:
画布以左上角为原点(0,0),向右为X轴的正方向,向下为Y轴的正方向
Canvas的绘图操作:
绘制颜色 drawColor、drawRGB、drawARGB
绘制圆 drawCircle
绘制点 drawPoint
绘制直线 drawLine
绘制矩形 drawRect
绘制圆角矩形 drawRoundRect
绘制椭圆 drawOval
绘制弧形 drawArc
绘制文本 drawText
沿Path路径绘制文本 drawTextOnPath
绘制位图 drawBitmap
//绘制颜色
public void drawColor(@ColorInt int color)
public void drawRGB(int r, int g, int b)
public void drawARGB(int a, int r, int g, int b)
//绘制圆
public void drawCircle(float cx, float cy, float radius, @NonNull Paint paint)
//绘制点
public void drawPoint(float x, float y, @NonNull Paint paint)
//绘制多个点
public void drawPoints(@Size(multiple = 2) @NonNull float[] pts, @NonNull Paint paint)
//绘制一条直线
public void drawLine(float startX, float startY, float stopX, float stopY, @NonNull Paint paint)
//绘制多条直线
public void drawLines(@Size(multiple = 4) @NonNull float[] pts, @NonNull Paint paint)
//绘制一个矩形
public void drawRect(@NonNull RectF rect, @NonNull Paint paint)
public void drawRect(@NonNull Rect r, @NonNull Paint paint)
public void drawRect(float left, float top, float right, float bottom, @NonNull Paint paint)
//绘制一个圆角矩形
public void drawRoundRect(@NonNull RectF rect, float rx, float ry, @NonNull Paint paint)
public void drawRoundRect(float left, float top, float right, float bottom, float rx, float ry, @NonNull Paint paint)
//绘制一个椭圆
public void drawOval(@NonNull RectF oval, @NonNull Paint paint)
public void drawOval(float left, float top, float right, float bottom, @NonNull Paint paint)
//绘制一个弧形
public void drawArc(@NonNull RectF oval, float startAngle, float sweepAngle, boolean useCenter, @NonNull Paint paint)
public void drawArc(float left, float top, float right, float bottom, float startAngle, float sweepAngle, boolean useCenter, @NonNull Paint paint)
//绘制文本
public void drawText(@NonNull String text, float x, float y, @NonNull Paint paint)
//沿Path路径绘制文本
public void drawTextOnPath(@NonNull String text, @NonNull Path path, float hOffset, float vOffset, @NonNull Paint paint)
//绘制位图
public void drawBitmap(@NonNull Bitmap bitmap, float left, float top, @Nullable Paint paint)
public void drawBitmap(@NonNull Bitmap bitmap, @Nullable Rect src, @NonNull RectF dst, @Nullable Paint paint)
参考:
https://blog.csdn.net/zenmela2011/article/details/123458194
https://blog.csdn.net/xujian197/article/details/79903544
自研产品推荐
历时一年半多开发终于smartApi-v1.0.0版本在2023-09-15晚十点正式上线
smartApi是一款对标国外的postman的api调试开发工具,由于开发人力就作者一个所以人力有限,因此v1.0.0版本功能进行精简,大功能项有:
- api参数填写
- api请求响应数据展示
- PDF形式的分享文档
- Mock本地化解决方案
- api列表数据本地化处理
- 再加上UI方面的打磨
为了更好服务大家把之前的公众号和软件激活结合,如有疑问请大家反馈到公众号即可,下个版本30%以上的更新会来自公众号的反馈。
嗯!先解释不上服务端原因,API调试工具的绝大多数时候就是一个数据模型、数据处理、数据模型理解共识的问题解决工具,所以作者结合自己十多年开发使用的一些痛点来打造的,再加上服务端开发一般是面向企业的,作者目前没有精力和时间去打造企业服务。再加上没有资金投入所以服务端开发会滞后,至于什么时候会进行开发,这个要看募资情况和用户反馈综合考虑。虽然目前国内有些比较知名的api工具了,但作者使用后还是觉得和实际使用场景不符。如果有相关吐槽也可以在作者的公众号里反馈蛤!
下面是一段smartApi使用介绍: