According to the needs of the project, I hope this kind of demand can give some friends in need some ideas
My idea is to first select the picture to blur the picture through Gaussian blur, then set the transparency of the picture by capturing the touch point, and finally synthesize the picture to achieve a partially clear and partially blurred effect.
The following code is directly associated with the remote library in the project's build.gradle
allprojects {
repositories {
jcenter()
maven {url " https://jitpack.io "}
}
}
Add the dependency
compile 'com.github.pinguo in the app's build.gradle -zhouwei:EasyBlur:v1.0.0'
say it again to an xml view file
<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>Show clear and blurred images to two imageviews respectively
The comments of the activity file are given below. It is very clear for everyone to see for themselves.
/**
*
* 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;
}
}I will not give the method of compressing pictures here for camera album selection. I also have an article, you can check it out yourself https://blog.csdn.net/naide_s/article/details/79840320Image compression
Say at the end if you report an error java.lang.NoClassDefFoundError: Failed resolution of: Landroid/support/v8/renderscript/RenderScript;
don't worry about finding your sdk Android\Sdk\build-tools\21.1.1\renderscript\lib under this path Renderscript-v8,jar is copied to the libs folder of your project and the synchronization is complete.