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intensifyimageview's Introduction

Android Picture Preview

一个用于大图预览的类库,可用于显示几十兆级别的图片,使图片在缩放过程中保持最佳清晰度。

单张图片的缩放加载 多张图片切换预览 ScaleType切换
单图预览 多图切换 ScaleType

Demo

安装 apk 文件预览效果,或者通过下面二维码去下载安装:

demo apk 文件地址二维码

Usage

Use Gradle:

dependencies {
   compile 'me.kareluo.intensify:image:1.1.0'
}

Or Maven:

<dependency>
  <groupId>me.kareluo.intensify</groupId>
  <artifactId>image</artifactId>
  <version>1.1.0</version>
  <type>pom</type>
</dependency>

Sample

布局文件如下,width和height都要使用match_parent:

<me.kareluo.intensify.image.IntensifyImageView
   android:id="@+id/intensify_image"
   android:layout_width="match_parent"
   android:layout_height="match_parent"
   app:scaleType="fitAuto" />

代码中可以通过以下三种方式设置图片资源:

IntensifyImageView imageView = (IntensifyImageView)findViewById(R.id.intensify_image);

// 通过流设置
imageView.setImage(InputStream inputStream);

// 通过文件设置
imageView.setImage(File file);

// 通过文件路径设置
imageView.setImage(String path);

Blog

大图预览的主要原理是通过BitmapRegionDecoder对图片进行分块加载实现的,并在内存中维护不同精度,不同区域的Bitmap对象的加载与回收,详细内容可参考此篇博客:Android 原图预览

Update Logs

v1.0.0

  • 图片分块加载
  • 支持多图切换
  • 双击缩放及手势缩放
  • 移动、快速滑动、回弹、居中等

v1.1.0

  • 支持ScrollBar
  • 添加CENTERCENTER_INSIDE
  • 优化缩放抖动问题
  • 添加ScaleType切换动画

License

Copyright 2015 kareluo.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

	http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

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intensifyimageview's Issues

OOM

出现OOM问题

大图加载加载失败

versionCode=1
BOARD=MT7-TL00
BOOTLOADER=unknown
TYPE=user
matchers=[Ljava.lang.String;@15346820
ID=HuaweiMT7-TL00
TIME=1450988254000
BRAND=Huawei
TAG=Build
SERIAL=P4M7N15318016043
HARDWARE=hi3630
SUPPORTED_ABIS=[Ljava.lang.String;@34da1b23
NO_HOTA=false
CPU_ABI=armeabi-v7a
RADIO=21.130.00.00.030,21.130.00.00.030
IS_DEBUGGABLE=false
replacements=[Ljava.lang.String;@27ca45d9
MANUFACTURER=HUAWEI
SUPPORTED_32_BIT_ABIS=[Ljava.lang.String;@11a1f8dd
TAGS=release-keys
CPU_ABI2=armeabi
UNKNOWN=unknown
USER=jenkins
FINGERPRINT=Huawei/MT7-TL00/hwmt7:5.1.1/HuaweiMT7-TL00/C01B357:user/release-keys
HOST=WUH1000009863
PRODUCT=MT7-TL00
versionName=1.6.0
DISPLAY=MT7-TL00C01B357
HIDE_PRODUCT_INFO=false
MODEL=HUAWEI MT7-TL00
DEVICE=hwmt7
java.lang.NullPointerException: Attempt to invoke virtual method 'int android.graphics.Bitmap.getWidth()' on a null object reference
at me.kareluo.intensify.image.IntensifyImageDelegate.bitmapRect(IntensifyImageDelegate.java:607)
at me.kareluo.intensify.image.IntensifyImageDelegate.obtainBaseDrawables(IntensifyImageDelegate.java:561)
at me.kareluo.intensify.image.IntensifyImageDelegate.obtainImageDrawables(IntensifyImageDelegate.java:549)
at me.kareluo.intensify.image.IntensifyImageView.onDraw(IntensifyImageView.java:123)
at android.view.View.draw(View.java:15291)
at android.view.View.updateDisplayListIfDirty(View.java:14213)
at android.view.View.getDisplayList(View.java:14235)
at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:3395)
at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3374)
at android.view.View.updateDisplayListIfDirty(View.java:14173)
at android.view.View.getDisplayList(View.java:14235)
at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:3395)
at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3374)
at android.view.View.updateDisplayListIfDirty(View.java:14173)
at android.view.View.getDisplayList(View.java:14235)
at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:3395)
at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3374)
at android.view.View.updateDisplayListIfDirty(View.java:14173)
at android.view.View.getDisplayList(View.java:14235)
at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:3395)
at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3374)
at android.view.View.updateDisplayListIfDirty(View.java:14173)
at android.view.View.getDisplayList(View.java:14235)
at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:3395)
at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3374)
at android.view.View.updateDisplayListIfDirty(View.java:14173)
at android.view.View.getDisplayList(View.java:14235)
at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:3395)
at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3374)
at android.view.View.updateDisplayListIfDirty(View.java:14173)
at android.view.View.getDisplayList(View.java:14235)
at android.view.ThreadedRenderer.updateViewTreeDisplayList(ThreadedRenderer.java:291)
at android.view.ThreadedRenderer.updateRootDisplayList(ThreadedRenderer.java:297)
at android.view.ThreadedRenderer.draw(ThreadedRenderer.java:349)
at android.view.ViewRootImpl.draw(ViewRootImpl.java:2626)
at android.view.ViewRootImpl.performDraw(ViewRootImpl.java:2426)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2049)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1105)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6186)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:793)
at android.view.Choreographer.doCallbacks(Choreographer.java:606)
at android.view.Choreographer.doFrame(Choreographer.java:575)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:779)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os

报空指针

java.lang.NullPointerException: Attempt to read from field 'int me.kareluo.intensify.image.IntensifyImageDelegate$c.d' on a null object reference
at me.kareluo.intensify.image.IntensifyImageDelegate.h(TbsSdkJava:2)
at me.kareluo.intensify.image.IntensifyImageDelegate.r(TbsSdkJava:1)
at me.kareluo.intensify.image.IntensifyImageDelegate.f(TbsSdkJava:1)
at me.kareluo.intensify.image.IntensifyImageDelegate$j.onAnimationUpdate(TbsSdkJava:3)
at android.animation.ValueAnimator.animateValue(ValueAnimator.java:1558)
at android.animation.ValueAnimator.animateBasedOnTime(ValueAnimator.java:1349)
at android.animation.ValueAnimator.doAnimationFrame(ValueAnimator.java:1481)
at android.animation.AnimationHandler.doAnimationFrame(AnimationHandler.java:146)
at android.animation.AnimationHandler.access$100(AnimationHandler.java:37)
at android.animation.AnimationHandler$1.doFrame(AnimationHandler.java:54)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:1055)
at android.view.Choreographer.doCallbacks(Choreographer.java:875)
at android.view.Choreographer.doFrame(Choreographer.java:772)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:1042)
at android.os.Handler.handleCallback(Handler.java:888)
at android.os.Handler.dispatchMessage(Handler.java:100)
at android.os.Looper.loop(Looper.java:213)
at android.app.ActivityThread.main(ActivityThread.java:8147)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:513)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1101)

关于代码中的疑惑

您好,看了您的源码,感觉很有意思,但是有些地方不太明白,可以交流下吗,我的QQ是562687313

无法读取图片

1.0.0 和1.1.0 版本在小米3等机型上读取某些图片时报无法读取图片的错误,使用的是setImage(file)方法。同样一张图片在这些机型上不可以在其他机型上可以读取显示。

部分机型不兼容的问题

try {
mImageRegion = decoder.newRegionDecoder();
} catch (IOException e) {
throw new RuntimeException("无法访问图片");
}

这里直接崩了 如何解决呢?

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