根据项目需要 需要这种需求 希望可以给一些有需求的朋友一点思路
我的思路是 先选取图片 通过高斯模糊 模糊图片 然后通过捕获触摸点 去设置图片的透明度 最后合成图片 达到部分清晰部分模糊的效果
下面直接上代码 在project的build.gradle关联远程库
allprojects {
repositories {
jcenter()
maven {url “https://jitpack.io“}
}
}
在app的build.gradle 添加依赖
compile ‘com.github.pinguo-zhouwei:EasyBlur:v1.0.0’
说一遍给一个xml 视图文件
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/easyblur_getpic"
android:text="getPicture"/>
<FrameLayout
android:layout_width="match_parent"
android:layout_height="200dp">
<ImageView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="center_horizontal"
android:layout_marginTop="50dp"
android:scaleType="fitXY"
android:id="@+id/easyblur_pic1"/>
<ImageView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="center_horizontal"
android:layout_marginTop="50dp"
android:scaleType="fitXY"
android:id="@+id/easyblur_pic2"/>
</FrameLayout>
</LinearLayout>给两个imageview 分别显示清晰和模糊的图片
下面给出activity 文件 注释很清楚 大家自己看
/**
*
* 作者: Nade_S on 2018/4/19.
* 高斯模糊 仿彩票刮奖功能
*
*/
public class EasyBlurActivity extends BaseActivity{
private String originPath;
private Bitmap mOriginalBitmap;
private ImageView blur_image;
private ImageView iv_pre_image;
private Bitmap beforeBitmap;
private Canvas canvas;
private int blurRadius = 12;
private int eraseIndex=0;
private boolean isFirstTouch=true;
private Bitmap notBackBitmap;
private HashMap<Integer,Bitmap> bitmapList=new HashMap<>();
private AlertDialog blurDialog;
private String mergePath;
private String blurPath;
private static final int width=4;
private ImageView easyblur_pic1 , easyblur_pic2;
@Override
public void setContentView() {
super.setContentView();
setContentView(R.layout.activity_easyblur);
easyblur_pic1 = (ImageView) findViewById(R.id.easyblur_pic1);
easyblur_pic2 = (ImageView) findViewById(R.id.easyblur_pic2);
findViewById(R.id.easyblur_getpic).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
showImageFromDialog();
}
});
}
//底部弹窗 选择图片
private void showImageFromDialog() {
final Context context = this;
AlertDialog.Builder b1 = new AlertDialog.Builder(context);
View view = LayoutInflater.from(context).inflate(R.layout.picture_dialog, null);
b1.setView(view);
TextView camere = (TextView) view.findViewById(R.id.picdia_camere);
TextView pic = (TextView) view.findViewById(R.id.picdia_pic);
TextView cancel1 = (TextView) view.findViewById(R.id.picdia_cancel);
final AlertDialog dialog1 = b1.create();
Window window = dialog1.getWindow();
camere.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String status= Environment.getExternalStorageState();
if(status.equals(Environment.MEDIA_MOUNTED)){//判断是否有SD卡
// 从照相机获取
PictureUtils.takeCamera(EasyBlurActivity.this);
dialog1.dismiss();
}
else{
Toast.makeText(context, "没有SD卡", Toast.LENGTH_SHORT).show();
}
}
});
pic.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// 从相册中去获取
PictureUtils.takeGallery();
dialog1.dismiss();
}
});
cancel1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
dialog1.dismiss();
}
});
dialog1.show();
if (window!=null){
window.setGravity(Gravity.BOTTOM);
}
}
/*
* 创建画布，画笔
* */
private void handlePic(ImageView imageView,Bitmap bitmap){
Bitmap before = bitmap;
beforeBitmap = Bitmap.createBitmap(before.getWidth(),
before.getHeight(), before.getConfig());
canvas = new Canvas(beforeBitmap);
Paint paint = new Paint();
paint.setAntiAlias(true);
canvas.drawBitmap(before, new Matrix(), paint);
if (beforeBitmap !=null){
imageView.setImageBitmap(beforeBitmap);
}
}
/*
* 模糊处理图片弹窗 持有bitmap 对象 从模糊到透明
* */
private void showBlurDialog(Bitmap imageBitmap){
blurRadius=15;
AlertDialog.Builder builder = null;
builder = new AlertDialog.Builder(EasyBlurActivity.this);
builder.setCancelable(true);
View view = LayoutInflater.from(context).inflate(R.layout.blur_layout, null);
builder.setView(view);//iv_imgsss
final ImageView iv_back = (ImageView) view.findViewById(R.id.iv_back);
blur_image = (ImageView) view.findViewById(R.id.iv_image);
iv_pre_image = (ImageView)view.findViewById(R.id.iv_pre_image);
final LinearLayout ll_guide = (LinearLayout) view.findViewById(R.id.ll_guide);
iv_pre_image.setImageBitmap(imageBitmap);
ImageView iv_cancel = (ImageView) view.findViewById(R.id.iv_cancel);
ImageView iv_confirm = (ImageView) view.findViewById(R.id.iv_confirm);
SeekBar seekBar = (SeekBar) view.findViewById(R.id.seekBar);
if (blurRadius>0){
handlePic(blur_image,getBluredBitmap(imageBitmap,blurRadius));
}
//撤销模糊动作
iv_back.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if (eraseIndex>0){
eraseIndex--;
//blur_image.setImageBitmap(bitmapList.get(eraseIndex));
if (notBackBitmap!=null){
beforeBitmap =notBackBitmap;
}
blur_image.setImageBitmap(getBluredBitmap(mOriginalBitmap,blurRadius));
if (eraseIndex==0){
iv_back.setImageResource(R.mipmap.last_light);
}
}else {
showToast("无法撤销了");
}
}
});
//监听手指拖动改变透明度 捕获触摸点 设置透明
blur_image.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View view, MotionEvent motionEvent) {
if (isFirstTouch){
notBackBitmap= beforeBitmap;
}
switch (motionEvent.getAction()) {
case MotionEvent.ACTION_MOVE:
isFirstTouch=false;
int x = (int) motionEvent.getX();
int y = (int) motionEvent.getY();
int bitx = (int) (x/(blur_image.getWidth()/ beforeBitmap.getWidth()));
int bity = (int)(y/(blur_image.getHeight()/ beforeBitmap.getHeight()));
for (int i = bitx-width; i <= bitx+width; i++) {
for (int j = bity-width; j <=bity+ width; j++) {
if ( i >= 0 && j >= 0 && i < beforeBitmap.getWidth() &&j < beforeBitmap.getHeight()) {
beforeBitmap.setPixel( i, j, Color.TRANSPARENT);
}
}
}
blur_image.setImageBitmap(beforeBitmap);
break;
case MotionEvent.ACTION_UP:
eraseIndex++;
bitmapList.put(eraseIndex, beforeBitmap);
if (eraseIndex>0){
iv_back.setImageResource(R.mipmap.last_dark);
}
break;
case MotionEvent.ACTION_DOWN:
ll_guide.setVisibility(View.GONE);
break;
}
return true;
}
});
//取消弹框
iv_cancel.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if (blurDialog!=null){
blurDialog.dismiss();
}
}
});
//生成新的模糊图片，保存并展示在ui上
iv_confirm.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
blurPath = CropPictures.saveBitmapFile(beforeBitmap,getPhotoFileName());
easyblur_pic2.setImageBitmap(beforeBitmap);
if (blurDialog!=null){
blurDialog.dismiss();
}
//生成合并图片并保存
if (!TextUtils.isEmpty(originPath)&& beforeBitmap !=null){
Bitmap backgroundBitmap = BitmapFactory.decodeFile(originPath);
Bitmap foregroundBitmap= beforeBitmap;
Bitmap mergeBitmap = mergeThumbnailBitmap(backgroundBitmap, foregroundBitmap);
mergePath = CropPictures.saveBitmapFile(mergeBitmap,getPhotoFileName());
}
}
});
//监听seekbar的拖动，改变整体透明度
seekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
@Override
public void onProgressChanged(SeekBar seekBar, int i, boolean b) {
blurRadius = i;
Log.d("tag","模糊率="+i);
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
}
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
eraseIndex=0;
bitmapList.clear();
iv_back.setImageResource(R.mipmap.last_light);
if (blur_image !=null){
if (blurRadius>0){
handlePic(blur_image,getBluredBitmap(mOriginalBitmap,blurRadius));
}
}
}
});
blurDialog = builder.create();
blurDialog.show();
eraseIndex=0;
bitmapList.clear();
}
/*
* 高斯 模糊图片
* */
private Bitmap getBluredBitmap(Bitmap originBitmap,int blurRadius){
Bitmap finalBitmap;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1){//api大于17采用renderscript模糊
finalBitmap = EasyBlur.with(EasyBlurActivity.this)
.bitmap(originBitmap) //要模糊的图片
.radius(blurRadius)//模糊半径
.scale(4)//指定模糊前缩小的倍数
.policy(EasyBlur.BlurPolicy.RS_BLUR)//使用renderscript
.blur();
}else {
finalBitmap = EasyBlur.with(EasyBlurActivity.this)
.bitmap(originBitmap) //要模糊的图片
.radius(blurRadius)//模糊半径
.scale(4)//指定模糊前缩小的倍数
.policy(EasyBlur.BlurPolicy.FAST_BLUR)//使用fastBlur
.blur();
}
return finalBitmap;
}
@RequiresApi(api = Build.VERSION_CODES.JELLY_BEAN_MR1)
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (resultCode != RESULT_OK)
return;
originPath = FileUtils.getFileName();
switch (requestCode) {
case PictureUtils.TYPE_CAMERE:
//压缩图片 返回bitmap 对象
mOriginalBitmap = BitmapUtils.getSmallBitmap(PictureUtils.out.getAbsolutePath(), 480, 480,new File(originPath));
clearImageView();
easyblur_pic2.setImageBitmap(mOriginalBitmap);
easyblur_pic1.setImageBitmap(mOriginalBitmap);
showBlurDialog(mOriginalBitmap);
break;
case PictureUtils.TYPE_GALLERY:
mOriginalBitmap = BitmapUtils.getSmallBitmap(PictureUtils.getRealPathFromURI(EasyBlurActivity.this, data.getData()), 480, 480,new File(originPath));
clearImageView();
easyblur_pic2.setImageBitmap(mOriginalBitmap);
easyblur_pic1.setImageBitmap(mOriginalBitmap);
showBlurDialog(mOriginalBitmap);
break;
}
}
public void clearImageView() {
if (easyblur_pic2!=null){
easyblur_pic2.setImageBitmap(null);
}
if (blur_image !=null){
blur_image.setImageBitmap(null);
}
}
// 以当前时间给图片命名
public String getPhotoFileName() {
Date date = new Date(System.currentTimeMillis());
SimpleDateFormat dateFormat = new SimpleDateFormat("'IMG'_yyyyMMddHHmmss");
return dateFormat.format(date) + ".jpg";
}
/*
* 合并两张图片为一张
* */
private Bitmap mergeThumbnailBitmap(Bitmap background, Bitmap foreground) {
//以其中一张图片的大小作为画布的大小，或者也可以自己自定义
Bitmap bitmap = Bitmap.createBitmap(background.getWidth(), background
.getHeight(), background.getConfig());
//生成画布
Canvas canvas = new Canvas(bitmap);
//因为我传入的secondBitmap的大小是不固定的，所以我要将传来的secondBitmap调整到和画布一样的大小
float w = background.getWidth();
float h = background.getHeight();
Matrix m = new Matrix();
//确定secondBitmap大小比例
m.setScale(w / foreground.getWidth(), h / foreground.getHeight());
Paint paint = new Paint();
//给画笔设定透明值，想将哪个图片进行透明化，就将画笔用到那张图片上
paint.setAlpha(255);
canvas.drawBitmap(background, 0, 0, null);
canvas.drawBitmap(foreground, m, paint);
return bitmap;
}
}相机相册选择图片我就不在这里给出了 压缩图片的方法 本人也有文章 你可以自己去看一下 https://blog.csdn.net/naide_s/article/details/79840320 图片压缩
说在最后 如果报错 java.lang.NoClassDefFoundError: Failed resolution of: Landroid/support/v8/renderscript/RenderScript;
不要担心 找到你的sdk Android\Sdk\build-tools\21.1.1\renderscript\lib 这个路径下的 renderscript-v8,jar 复制到你项目的libs 文件夹下 同步完成就可以了