Android应用源码之Android创建抗锯齿透明背景圆角图像.zip

RoundedImageView ================ A fast ImageView (and Drawable) that supports rounded corners (and ovals or circles) based on the original [example from Romain Guy](http://www.curious-creature.org/2012/12/11/android-recipe-1-image-with-rounded-corners/)   There are many ways to create rounded corners in android, but this is the fastest and best one that I know of because it: * does **not** create a copy of the original bitmap * does **not** use a clipPath which is not hardware accelerated and not anti-aliased. * does **not** use setXfermode to clip the bitmap and draw twice to the canvas. If you know of a better method, let me know and I'll implement it! Also has proper support for: * Borders (with Colors and ColorStateLists) * Ovals and Circles * All `ScaleType`s * Borders are drawn at view edge, not bitmap edge. * Except on edges where the bitmap is smaller than the view * Borders are **not** scaled up/down with the image (correct width and radius are maintained) * Anti-aliasing * Transparent backgrounds * Hardware acceleration * Support for LayerDrawables (including TransitionDrawables) Gradle ---- RoundedImageView is available on Maven Central. Add the following to your `build.gradle` to use: ``` repositories { mavenCentral() } dependencies { compile 'com.makeramen:roundedimageview:1.2.4' } ``` Maven (Deprecated) ---- Make sure you installed Android 4.2 from the [Android Maven Deployer](https://github.com/mosabua/maven-android-sdk-deployer) Build the apk: ``` git clone https://github.com/vinc3m1/RoundedImageView.git cd ./RoundedImageView/ mvn clean install ``` Install and run: ```` cd ./example mvn android:deploy android:run ```` If you want to use the library, add this dependency: ``` <dependency> <groupId>com.makeramen</groupId> <artifactId>roundedimageview-apklib</artifactId> <version>1.2.0</version> <type>apklib</type> </dependency> ``` Usage ---- Define in xml: ```xml <com.makeramen.RoundedImageView xmlns:app="http://schemas.android.com/apk/res-auto" android:id="@+id/imageView1" android:src="@drawable/photo1" android:scaleType="centerCrop" app:corner_radius="30dip" app:border_width="2dip" app:border_color="#333333" app:round_background="true" app:is_oval="true" /> ``` Or in code: ```java RoundedImageView iv = new RoundedImageView(context); iv.setScaleType(ScaleType.CENTER_CROP); iv.setCornerRadius(10); iv.setBorderWidth(2); iv.setBorderColor(Color.DKGRAY); iv.setRoundedBackground(true); iv.setImageDrawable(drawable); iv.setBackground(backgroundDrawable); iv.isOval(true); ``` ChangeLog ---------- * **1.2.4** * add basic support for ColorDrawable (and other drawables with -1 intrinsic dimens) * implementation of the above is known to be buggy in many cases, pull requests welcome * **1.2.3** * added rudimentary support for `setImageUri`. Performance of the function is probably poor and users should be cautious when using it. * **1.2.2** * fix for incorrect radius on the image when there is a border * add a `toBitmap()` function for easier Picasso and Ion compatibility * **1.2.1** * default scaleType now FIT_CENTER (and never null) to match Android ([#27](https://github.com/vinc3m1/RoundedImageView/issues/27)) * **1.2.0** * add `setDither` and `setFilterBitmap` method support on RoundedDrawable for tuning bitmap scaling quality * improved performance for `setImageResource` * RoundedDrawable constructor is now public * Fixed bug where artifact was downloading `aar.asc` file instead of aar. You no longer need to have `@aar` specified in the dependency * **1.1.0** * LayerDrawable support (needs testing!) * Refactored api to support chaining and remove repetitive code * **1.0.0** * Initial release to maven central * Programmatically setting attributes with TransitionDrawables not supported. [](https://bitdeli.com/free "Bitdeli Badge")