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android_dp_analysis_code's Introduction

《Android源码设计模式解析与实战》

为了尽量减少代码量,书中的代码都做了大量简化,因此示例代码只作为学习使用,不建议使用到项目中。

代码目录

  • imageloader-demo : 第一章的六大原则

  • android_dp_analysis_book_java : 第2、3、4、7、8、13、16、22、23章的 Java 示例代码;

  • android_dp_note_demo : 第十三章的 Android 示例;

  • android_dp_state : 第十六章的状态模式 Android 示例 ;

  • android_dp_plugin、android_dp_plugin_host、android_dp_plugin_plugin为第23章的动态加载框架(参考DL)的demo ;

  • appcompat_v7 : android demo需要依赖的库;

  • 书中的ImageLoader只是一个最简单的demo,更详细的ImageLoader 示例 在这里

  • 最后一章的例子在这里

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android_dp_analysis_code's Issues

线程池中非主线程更新ImageView,更新成功的问题。

在书中第二页第一章的例子中,为什么没有使用Handler就可以直接在子线程中更新ImageView?代码通过我调试,发现确实更新了ImageView,并且没有报异常。部分代码如下:

public void displayImage(final String url, final ImageView imageView) {
        imageView.setTag(url);
        mExecutorService.submit(new Runnable() {
            @Override
            public void run() {
                Bitmap bitmap = downloadImage(url);
                if (bitmap == null) {
                    return;
                }
                if (imageView.getTag().equals(url)) {
                    imageView.setImageBitmap(bitmap);
                }
                bitmap.recycle();
                mImageCache.put(url, bitmap);
            }
        });
    }

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