Android Interface Component----Image view

The ImageView component in the Android interface displays any object that is stored under drawable in the screen, usually the object type is a picture. When using ImageView to display pictures, it is common practice to copy the pictures to the Res/drawanle directory and access them through r.drawable.name.

a ImageView XML attribute

Android:adjustviewbounds confirm whether to adjust the aspect ratio of the displayed picture

android:maxheight Set the maximum height of the picture

android:maxWidth Set the maximum width of the picture

android:ScaleType Set How the image is scaled to fit the ImageView(the image size does not necessarily conform to the ImageView size)

android:src settings display the picture under Drawable, parameter is the picture name

android:tint for picture coloring, property is color value

two actual operation

Example: Image browser

We create a simple image browser, modeled after the photo browser of the Android phone

1> New Jian ' an project, add a linear layout to the layout, layout way we have XML form

2> prepare several pictures to copy to the project drawable directory. Note thatdrawable has several directories, such as drawable-hdpi, which correspond to different resolutions.

3> functions in the main activity: Get the linear layout, add the ImageView in turn

Final effect: (Looks ugly and has wood)

Code:

//Defining picture views and resource pathsPrivateimageview[] img =NewImageview[4];Private int[] Imgpath =New int[]{r.drawable.first, R.drawable.second, R.drawable.third, R.drawable.forth};//Initialize picture view, add layoutLinearLayout L =(LinearLayout) Findviewbyid (R.ID.S); img[0] =NewImageView ( This); img[0].setimageresource (imgpath[0]); img[0].setpadding (0, 0, 10, 10); L.addview (img[0]); img[1] =NewImageView ( This); img[1].setimageresource (imgpath[1]); img[1].setpadding (1, 0, 10, 10); L.addview (img[1]); img[2] =NewImageView ( This); img[2].setimageresource (imgpath[2]); img[2].setpadding (1, 0, 20, 10); L.addview (img[2]); img[3] =NewImageView ( This); img[3].setimageresource (imgpath[3]); img[3].setpadding (1, 0, 20, 10); L.addview (img[3]);

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Android Interface Component----Image view