如何在android中使用filepath将图像设置为imageView

我通过使用浏览按钮获取图像的文件路径….之后我想使用文件路径将此图像设置为图像视图

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  • 如果使用File表示File对象,我会尝试:

     File file = .... Uri uri = Uri.fromFile(file); imageView.setImageURI(uri); 

    您可以试试这段代码:

     imageView.setImageBitmap(BitmapFactory.decodeFile(yourFilePath)); 

    BitmapFactory会将给定的图像文件解码为Bitmap对象,然后将其设置为imageView对象。

    要从文件设置图像,您需要执行以下操作:

      File file = new File(Environment.getExternalStorageDirectory()+File.separator + "image.jpg"); //your image file path mImage = (ImageView) findViewById(R.id.imageView1); mImage.setImageBitmap(decodeSampledBitmapFromFile(file.getAbsolutePath(), 500, 250)); 

    decodeSampledBitmapFromFile

      public static Bitmap decodeSampledBitmapFromFile(String path, int reqWidth, int reqHeight) { // BEST QUALITY MATCH // First decode with inJustDecodeBounds=true to check dimensions final BitmapFactory.Options options = new BitmapFactory.Options(); options.inJustDecodeBounds = true; BitmapFactory.decodeFile(path, options); // Calculate inSampleSize // Raw height and width of image final int height = options.outHeight; final int width = options.outWidth; options.inPreferredConfig = Bitmap.Config.RGB_565; int inSampleSize = 1; if (height > reqHeight) { inSampleSize = Math.round((float)height / (float)reqHeight); } int expectedWidth = width / inSampleSize; if (expectedWidth > reqWidth) { //if(Math.round((float)width / (float)reqWidth) > inSampleSize) // If bigger SampSize.. inSampleSize = Math.round((float)width / (float)reqWidth); } options.inSampleSize = inSampleSize; // Decode bitmap with inSampleSize set options.inJustDecodeBounds = false; return BitmapFactory.decodeFile(path, options); } 

    您可以使用数字(在本例中为500和250)来更改ImageView的位图质量。

    要从文件加载图像:

     Bitmap bitmap = BitmapFactory.decodeFile(pathToPicture); 

    假设您的pathToPicture正确,则可以将此位图图像添加到ImageView

     ImageView imageView = (ImageView) getActivity().findViewById(R.id.imageView); imageView.setImageBitmap(BitmapFactory.decodeFile(pathToPicture));