新问题又来了，在通过BitmapFactory.decodeFile(String path)方法将突破转成Bitmap时，遇到大一些的图片，我们经常会遇到OOM(Out Of Memory)的问题。...中对这个成员的说明是这样的： If set to true, the decoder will return null (no bitmap), but the out… 也就是说，如果我们把它设为true，那么BitmapFactory.decodeFile...BitmapFactory.Options options = new BitmapFactory.Options(); options.inJustDecodeBounds = true; Bitmap bmp = BitmapFactory.decodeFile...options.outWidth = 200； options.outHeight = height; options.inJustDecodeBounds = false; Bitmap bmp = BitmapFactory.decodeFile...(path, options); image.setImageBitmap(bmp); 这样虽然我们可以得到我们期望大小的ImageView 但是在执行BitmapFactory.decodeFile
screenShot("test");//截图 String path = "/mnt/sdcard/123/test.png"; Bitmap bitmap = BitmapFactory.decodeFile...screenShot("test");//截图 String path = "/mnt/sdcard/123/test.png"; Bitmap bitmap = BitmapFactory.decodeFile...screenShot("test");//截图 String path = "/mnt/sdcard/123/test.png"; Bitmap bitmap = BitmapFactory.decodeFile...screenShot("test");//截图 String path = "/mnt/sdcard/123/test.png"; Bitmap bitmap = BitmapFactory.decodeFile...screenShot("testDemo"); String path = "/mnt/sdcard/123/testDemo.png"; Bitmap bitmap = BitmapFactory.decodeFile
View转换成Bitmap [7].保存bitmap ---- 一、生成Bitmap对象的方式 1.从文件获取(运行时权限自己处理) //通过文件绝对路径加载图片 Bitmap bitmap = BitmapFactory.decodeFile.../只获取信息，不分配内存 //通过文件绝对路径加载图片 String pathName = "/sdcard/DCIM/Camera/iv_500x400.bmp"; Bitmap bitmap = BitmapFactory.decodeFile...BitmapFactory.Options o2 = new BitmapFactory.Options(); o2.inSampleSize = scale; //对这张图片设置一个缩放值 bitmap = BitmapFactory.decodeFile...模糊.png 使用： String pathName = "/sdcard/DCIM/Camera/iv_500x400.png"; Bitmap bitmap = BitmapFactory.decodeFile...倒影.png 使用： String pathName = "/sdcard/DCIM/Camera/iv_500x400.png"; Bitmap bitmap = BitmapFactory.decodeFile
String path,ImageView imageView) { Options options = new Options(); options.inJustDecodeBounds=true; BitmapFactory.decodeFile...caculateInSampleSize(options,imageSize.width,imageSize.height); options.inJustDecodeBounds=false; Bitmap bitmap=BitmapFactory.decodeFile...path,int reqWidth, int reqHeight) { Options options = new Options(); options.inJustDecodeBounds=true; BitmapFactory.decodeFile...options.inSampleSize=caculateInSampleSize(options,reqWidth,reqHeight); options.inJustDecodeBounds=false; Bitmap bitmap=BitmapFactory.decodeFile
将一个View转换成Bitmap 7.保存bitmap --- 一、生成Bitmap对象的方式 1.从文件获取(运行时权限自己处理) //通过文件绝对路径加载图片 Bitmap bitmap = BitmapFactory.decodeFile.../只获取信息，不分配内存 //通过文件绝对路径加载图片 String pathName = "/sdcard/DCIM/Camera/iv_500x400.bmp"; Bitmap bitmap = BitmapFactory.decodeFile...BitmapFactory.Options o2 = new BitmapFactory.Options(); o2.inSampleSize = scale; //对这张图片设置一个缩放值 bitmap = BitmapFactory.decodeFile...Bitmap使用函数 三、模糊处理 [模糊.png] 使用： String pathName = "/sdcard/DCIM/Camera/iv_500x400.png"; Bitmap bitmap = BitmapFactory.decodeFile...、给一个Bitmap添加倒影 [倒影.png] 使用： String pathName = "/sdcard/DCIM/Camera/iv_500x400.png"; Bitmap bitmap = BitmapFactory.decodeFile
Bitmap bitmapOne = BitmapFactory.decodeFile(filePathOne); imageView.setImageBitmap(bitmapOne); // lets...final BitmapFactory.Options options = new BitmapFactory.Options(); options.inJustDecodeBounds = true; BitmapFactory.decodeFile...= true; options.inBitmap = bitmapOne; } options.inJustDecodeBounds = false; Bitmap bitmapTwo = BitmapFactory.decodeFile
这个结果也和我们之前说的质量压缩只是改变磁盘中的文件大小，并不能改变加载时内存中的图片大小 尺寸压缩 尺寸压缩的方法： Bitmap photoBitmap; File file; /** * 压缩图片使用,采用BitmapFactory.decodeFile...BitmapFactory.Options(); options.inJustDecodeBounds = true; //获取当前图片的边界大小，而不是将整张图片载入在内存中，避免内存溢出 BitmapFactory.decodeFile...inSampleSize的平方 options.inSampleSize = caculateSampleSize(options,500,50); Bitmap bm = BitmapFactory.decodeFile...质量压缩我们的主要方法是：MediaStore.Images.Media.getBitmap或者BitmapFactory.decodeStream;尺寸压缩我们用到的方法是:BitmapFactory.decodeFile
data) { super.onActivityResult(requestCode, resultCode, data); if (requestCode == 1) { Bitmap bitmap = BitmapFactory.decodeFile...BitmapFactory.Options options = new BitmapFactory.Options(); options.inJustDecodeBounds = true; bitmap = BitmapFactory.decodeFile...be = beWidth; } else { be = beHeight; } if (be <= 0) { be = 1; } options.inSampleSize = be; bitmap = BitmapFactory.decodeFile...View.VISIBLE); } // 设置需要显示的图片 s_tv.setText(getIntent().getStringExtra(NotesDB.CONTENT)); Bitmap bitmap = BitmapFactory.decodeFile
public void onClick(View v) { if (v == mBtnLoad) { Options options = new Options(); BitmapFactory.decodeFile...; //修改图片的缩放比例，如果scale=4说明图片缩小4倍，像数=1/16 options.inSampleSize = scale; Bitmap bm = BitmapFactory.decodeFile
BitmapFactory.Options(); options.inSampleSize = 1; bitmap = BitmapFactory.decodeFile...Override public void run() { while ( bitmap == null ){ bitmap = BitmapFactory.decodeFile...= null){ Bitmap bitmap = BitmapFactory.decodeFile(imagePath); imageView01.setImageBitmap
new BitmapFactory.Options(); options.inJustDecodeBounds = true; // 设置之后可以获取尺寸信息 Bitmap bitmap = BitmapFactory.decodeFile...options.inSampleSize = widthRatio; } } // 图片缩放 options.inJustDecodeBounds = false; bitmap = BitmapFactory.decodeFile
只是获取图片的头部信息及宽高 26 options.inJustDecodeBounds = true; 27 // 返回为null 28 BitmapFactory.decodeFile...options.inSampleSize = scale; 47 // 得到按照scale缩放后的图片 48 Bitmap bitmap = BitmapFactory.decodeFile
BitmapFactory.Options opts = new BitmapFactory.Options(); opts.inJustDecodeBounds = true; BitmapFactory.decodeFile...factor = 1; } opts.inSampleSize = factor; opts.inJustDecodeBounds = false; Bitmap bm = BitmapFactory.decodeFile
=new File(getCacheDir(),"2.png"); if(file.exists()){ System.out.println("使用缓存"); Bitmap bitmap=BitmapFactory.decodeFile...fileOutputStream.write(b,0,len); } fileOutputStream.close(); Bitmap bitmap=BitmapFactory.decodeFile...file=new File(getCacheDir(),"2.png"); if(file.exists()){ System.out.println("使用缓存"); Bitmap bitmap=BitmapFactory.decodeFile...=-1) { fileOutputStream.write(b,0,len); } fileOutputStream.close(); Bitmap bitmap=BitmapFactory.decodeFile
BitmapFactory.Options options = new BitmapFactory.Options(); options.inJustDecodeBounds = true; BitmapFactory.decodeFile...使用获取到的inSampleSize再此获取图片，加载到内存中 options.inJustDecodeBounds = false; Bitmap bitmap = BitmapFactory.decodeFile
//开始读入图片，此时把options.inJustDecodeBounds 设回true了 newOpts.inJustDecodeBounds = true; Bitmap bitmap = BitmapFactory.decodeFile...newOpts.inSampleSize = be;//设置缩放比例 //重新读入图片，注意此时已经把options.inJustDecodeBounds 设回false了 bitmap = BitmapFactory.decodeFile...//开始读入图片，此时把options.inJustDecodeBounds 设回true了 newOpts.inJustDecodeBounds = true; Bitmap bitmap = BitmapFactory.decodeFile...newOpts.inSampleSize = be;//设置缩放比例 //重新读入图片，注意此时已经把options.inJustDecodeBounds 设回false了 bitmap = BitmapFactory.decodeFile...当然了，获取到图片路径后不推荐直接使用 BitmapFactory.decodeFile(imgPath)来获取bitmap，因为某些图片体积可能很大，直接加载到内存中有可能会导致程序崩溃（我就遇到过了
(id).getVisibleBounds();//获取控件的rect对象 String path = screenShot("test");//截图 Bitmap bitmap = BitmapFactory.decodeFile...y) { screenShot("test");//截图 String path = "/mnt/sdcard/123/test.png"; Bitmap bitmap = BitmapFactory.decodeFile...y) { screenShot("test");//截图 String path = "/mnt/sdcard/123/test.png"; Bitmap bitmap = BitmapFactory.decodeFile...y) { screenShot("test");//截图 String path = "/mnt/sdcard/123/test.png"; Bitmap bitmap = BitmapFactory.decodeFile...(path1);//创建并初始化bitmap对象 Bitmap bitmap2 = BitmapFactory.decodeFile(path2);//创建并初始化bitmap对象 int
void load(View v){ Options opts=new Options(); opts.inJustDecodeBounds=true; BitmapFactory.decodeFile...scale); opts.inJustDecodeBounds=false; opts.inSampleSize=scale; Bitmap bitmap=BitmapFactory.decodeFile
file.exists()&& file.length() 0) { //使用缓存 的图片 System.out.println("使用缓存图片 "); final Bitmap cacheBitmap = BitmapFactory.decodeFile...fos.write(buffer, 0, len); } fos.close(); in.close(); //[2.8]通过位图工厂 获取bitmap(bitmap) final Bitmap bitmap = BitmapFactory.decodeFile
加载图片部分的代码如下： @Override public Bitmap loadBitmapImage(String path) { return BitmapFactory.decodeFile...= bitmap) return bitmap; } Bitmap bitmap = BitmapFactory.decodeFile(path); mImageCache.put...BitmapFactory.decodeFile(path, options); 可以对图片按尺寸压缩，也是不错的方案： options.inSampleSize = Util.computeSampleSize...options.inDither = false; options.inPreferredConfig = Bitmap.Config.ARGB_8888; Bitmap bitmap = BitmapFactory.decodeFile
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