先上图：
上代码
------------------------MainActivity------------------------
package com.example.zhuoshi.watermarkdemo;
import android.graphics.Bitmap;
import android.os.Environment;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.ImageView;
import android.widget.Toast;
/**
* Author: baipenggui
* Date: 2019/1/23 16:06
* Email: [email protected]
* Description: 在Activity中进行图片展示,以及图片保存
*/
public class MainActivity extends AppCompatActivity {
private static String filePath = Environment.getExternalStorageDirectory() + "/WatermarkPicture/";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
String photoAddress = "海淀区-清河路-西三旗桥";
String phoneDate = "2019-01-22";
String illicitCode = "1008";
String illicitBehavior = "闯红灯";
String equipmentNumber = "fgf54327d";
String antifakeInformation = "*#4%6&*@";
ImageView imageView = findViewById(R.id.image);
int resource = R.drawable.girl;
WatermarkSettings.getmInstance(this);
Bitmap bitmap = WatermarkSettings.createWatermark(resource, photoAddress, phoneDate, illicitCode, illicitBehavior, equipmentNumber, antifakeInformation);
imageView.setImageBitmap(bitmap);
//保存图片
imageView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
WatermarkSettings.savaWaterparkFile(filePath);
Toast.makeText(MainActivity.this, "您点击了图片,已保存", Toast.LENGTH_SHORT).show();
}
});
}
}
------------------------WatermarkSettings------------------------
package com.example.zhuoshi.watermarkdemo;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Rect;
import android.text.Layout;
import android.text.StaticLayout;
import android.text.TextPaint;
import android.text.TextUtils;
import android.util.DisplayMetrics;
import android.util.Log;
import android.view.WindowManager;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;
/**
* Author: baipenggui
* Date: 2019/1/23 16:06
* Email: [email protected]
* Description: 形成水印工具类
*/
public class WatermarkSettings {
public static WatermarkSettings mInstance;
public static Context mContext;
public static int mResources;
private static String watermarkText;
private static String mPhotoGraphed;
private static String mPhotoDate;
private static String mIllicitCode;
private static String mIllicitBehavior;
private static String mEquipmentNumber;
private static String mAntifakeInformation;
private static String TAG = "";
/*
*@Description: 图片添加水印的信息
*@Params:
*@Author: baipenggui
*@Date: 2019/1/23
*/
public static WatermarkSettings getmInstance(Context context) {
mContext = context;
if (mInstance == null) {
mInstance = new WatermarkSettings();
}
TAG = mContext.getClass().getName();
return mInstance;
}
/**
* @Description 创建水印文件,以下是水印上添加的文本信息
* @param resources 需要添加水印的图片资源
* @param photoGraphed 拍照地点
* @param photoDate 拍照时间
* @param illicitCode 违法代码
* @param illicitBehavior 违法行为
* @param equipmentNumber 设备编号
* @param antifakeInformation 防伪信息
* @return
*/
public static Bitmap createWatermark(int resources, String photoGraphed, String photoDate,
String illicitCode, String illicitBehavior, String equipmentNumber, String antifakeInformation) {
mResources = resources;
mPhotoGraphed = photoGraphed;
mPhotoDate = photoDate;
mIllicitCode = illicitCode;
mIllicitBehavior = illicitBehavior;
mEquipmentNumber = equipmentNumber;
mAntifakeInformation = antifakeInformation;
Bitmap bitmap = BitmapFactory.decodeResource(mContext.getResources(), resources);
// 获取图片的宽高
int bitmapWidth = bitmap.getWidth();
int bitmapHeight = bitmap.getHeight();
// 创建一个和图片一样大的背景图
Bitmap bmp = Bitmap.createBitmap(bitmapWidth, bitmapHeight, Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(bmp);
// 画背景图
canvas.drawBitmap(bitmap, 0, 0, null);
watermarkText = "违法时间:" + photoDate + "\n违法地点:" + photoGraphed + "\n违法代码:" + illicitCode + "\n违法行为:" + illicitBehavior + "\n设备编号:" + equipmentNumber + "\n防伪信息:" + antifakeInformation;
//-------------开始绘制文字--------------
if (!TextUtils.isEmpty(watermarkText)) {
int screenWidth = getScreenWidth();
float textSize = dp2px(mContext, 16) * bitmapWidth / screenWidth;
// 创建画笔
TextPaint mPaint = new TextPaint();
// 文字矩阵区域
Rect textBounds = new Rect();
// 水印的字体大小
mPaint.setTextSize(textSize);
// 文字阴影
mPaint.setShadowLayer(0.5f, 0f, 1f, Color.YELLOW);
// 抗锯齿
mPaint.setAntiAlias(true);
// 水印的区域
mPaint.getTextBounds(watermarkText, 0, watermarkText.length(), textBounds);
// 水印的颜色
mPaint.setColor(Color.BLUE);
StaticLayout layout = new StaticLayout(watermarkText, 0, watermarkText.length(), mPaint, (int) (bitmapWidth - textSize),
Layout.Alignment.ALIGN_NORMAL, 1.0F, 0.5F, true);
// 文字开始的坐标
float textX = dp2px(mContext, 8) * bitmapWidth / screenWidth;
//float textY = bitmapHeight / 2;//图片的中间
float textY = dp2px(mContext, 8) * bitmapHeight / screenWidth;
// 画文字
canvas.translate(textX, textY);
layout.draw(canvas);
}
//保存所有元素
canvas.save();
canvas.restore();
return bmp;
}
/**
* @Description 保存水印图片
* @param saveWatermarkPath 保存路径
*/
public static void savaWaterparkFile(String saveWatermarkPath) {
Bitmap watermark = createWatermark(mResources,mPhotoGraphed,mPhotoDate,mIllicitCode,mIllicitBehavior,mEquipmentNumber,mAntifakeInformation);
File watermarkfile = new File(saveWatermarkPath);
if (!watermarkfile.exists()) {
watermarkfile.mkdir();
}
// 创建媒体文件名
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss", Locale.getDefault()).format(new Date());
File file = new File(watermarkfile.getPath() + File.separator + timeStamp + ".jpg");
if(file!=null){
Log.e(TAG, "savaWaterparkFile: success ");
}else{
Log.e(TAG, "savaWaterparkFile: failure ");
}
BufferedOutputStream bos = null;
try {
bos = new BufferedOutputStream(new FileOutputStream(file));
if (watermark != null) {
watermark.compress(Bitmap.CompressFormat.JPEG, 80, bos);
}
} catch (FileNotFoundException e) {
e.printStackTrace();
}
try {
bos.flush();
bos.close();
} catch (IOException e) {
e.printStackTrace();
}
}
private static int getScreenWidth() {
DisplayMetrics dm = new DisplayMetrics();
WindowManager wm = (WindowManager) mContext.getSystemService(Context.WINDOW_SERVICE);
wm.getDefaultDisplay().getMetrics(dm);
return dm.widthPixels;
}
private static int dp2px(Context context, float dp) {
final float scale = context.getResources().getDisplayMetrics().density;
return (int) (dp * scale + 0.5f);
}
}
-----------------------------activity_main-----------------------------
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity"
android:background="#cccccc"
android:orientation="vertical">
<ImageView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scaleType="centerCrop"
android:id="@+id/image"/>
</LinearLayout>---------------- babygirl.jpg --------------
