Android开发实现的保存图片到相册功能示例

 //点击图片保存 imageView.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { String[] PERMISSIONS = { "android.permission.READ_EXTERNAL_STORAGE", "android.permission.WRITE_EXTERNAL_STORAGE" }; //检测是否有写的权限 int permission = ContextCompat.checkSelfPermission(MainActivity.this, "android.permission.WRITE_EXTERNAL_STORAGE"); if (permission != PackageManager.PERMISSION_GRANTED) { // 没有写的权限，去申请写的权限，会弹出对话框 ActivityCompat.requestPermissions(MainActivity.this, PERMISSIONS,1); } try { //创建savephoto类保存图片 SavePhoto savePhoto = new SavePhoto(MainActivity.this); savePhoto.SaveBitmapFromView(imageView); } catch (ParseException e) { e.printStackTrace(); } } }); 

 public class SavePhoto{ //存调用该类的活动 Context context; public SavePhoto(Context context) { this.context = context; } //保存文件的方法： public void SaveBitmapFromView(View view) throws ParseException { int w = view.getWidth(); int h = view.getHeight(); Bitmap bmp = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888); Canvas c = new Canvas(bmp); view.layout(0, 0, w, h); view.draw(c); // 缩小图片 Matrix matrix = new Matrix(); matrix.postScale(0.5f,0.5f); //长和宽放大缩小的比例 bmp = Bitmap.createBitmap(bmp,0,0,bmp.getWidth(),bmp.getHeight(),matrix,true); DateFormat format = new SimpleDateFormat("yyyyMMddHHmmss"); saveBitmap(bmp,bmp.toString() + ".JPEG"); } /* * 保存文件，文件名为当前日期 */ public void saveBitmap(Bitmap bitmap, String bitName){ String fileName ; File file ; if(Build.BRAND .equals("Xiaomi") ){ // 小米手机 fileName = Environment.getExternalStorageDirectory().getPath()+"/DCIM/Camera/"+bitName ; }else{ // Meizu 、Oppo Log.v("qwe","002"); fileName = Environment.getExternalStorageDirectory().getPath()+"/DCIM/"+bitName ; } file = new File(fileName); if(file.exists()){ file.delete(); } FileOutputStream out; try{ out = new FileOutputStream(file); // 格式为 JPEG，照相机拍出的图片为JPEG格式的，PNG格式的不能显示在相册中 if(bitmap.compress(Bitmap.CompressFormat.JPEG, 90, out)) { out.flush(); out.close(); // 插入图库 MediaStore.Images.Media.insertImage(context.getContentResolver(), file.getAbsolutePath(), bitName, null); } } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } // 发送广播，通知刷新图库的显示 context.sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, Uri.parse("file://" + fileName))); } }