代码写个九宫格布局显示图片

不在xml中设置布局，在代码中直接写个布局，显示下载的图片，如下图所示，图片有点丑

XML中添加个linearLayout

另外加个布局，显示图片view_files_image.xml

其他就是代码了：

public class MainActivity extends Activity {
    private LinearLayout layoutPhotos;//
    private LinkedHashMap choosePhotos = new LinkedHashMap();//已选择的照片
    private DisplayMetrics dm = new DisplayMetrics();
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        layoutPhotos = (LinearLayout) findViewById(R.id.report_photo_layout);
        //choosePhotos哦让其中添加图片地址
        choosePhotos.put(1, http://lllqmw.qiniudn.com/1.png);
        choosePhotos.put(2, http://lllqmw.qiniudn.com/2.png);
        choosePhotos.put(3, http://lllqmw.qiniudn.com/3.png);
        choosePhotos.put(4, http://lllqmw.qiniudn.com/4.png);
        choosePhotos.put(5, http://lllqmw.qiniudn.com/5.png);
        choosePhotos.put(6, http://lllqmw.qiniudn.com/6.png);
        choosePhotos.put(7, http://lllqmw.qiniudn.com/7.png);
        choosePhotos.put(8, http://lllqmw.qiniudn.com/8.png);
        //显示图片
        layoutShowFiles();
    }
    /**
     * 九宫格的方式显示下载的图片
     */
    private void layoutShowFiles() {

        layoutPhotos.removeAllViews();

        // 每行四张视图，计算一下第个的宽高
        getWindowManager().getDefaultDisplay().getMetrics(dm);
        int margins = (int) dm.density * 2;
        int photoWidth = (int) (((dm.widthPixels - dm.density * 30) / 3) - margins * 2.5);
        Log.i(info, 每个view的尺寸为： + photoWidth + ,间距为： + margins);

        LinearLayout subLayout = new LinearLayout(this);
        subLayout.setOrientation(LinearLayout.HORIZONTAL);
        LayoutParams subParams = new LayoutParams(photoWidth, photoWidth);
        subParams.setMargins(margins, margins, margins, margins);

        int i = 0;
        Iterator<>> iter = choosePhotos.entrySet().iterator();
        while (iter.hasNext()) {
            subLayout.addView(createLayoutPhoto(i, iter.next().getValue(), subParams));

            if (i % 3 == 2) {
                layoutPhotos.addView(subLayout, new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT));
                subLayout = new LinearLayout(this);
                subLayout.setOrientation(LinearLayout.HORIZONTAL);
            }

            i++;
        }

        // 计算一下sublayout还能放几个view，如果已经摆満了4个，刚新起一行
        if ((3 - choosePhotos.size() % 3) == 3) {
            subLayout = new LinearLayout(this);
            subLayout.setOrientation(LinearLayout.HORIZONTAL);
        }
        layoutPhotos.addView(subLayout, new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT));
    }

    /**
     * 生成一个图片
     * @param id
     * @param path
     * @param params
     * @return
     */
    private View createLayoutPhoto(final int imagePosition, final String path, LayoutParams params) {
        View v = getLayoutInflater().inflate(R.layout.view_files_image, null);
        v.setLayoutParams(params);
        ImageLoader.getInstance().displayImage(path, (ImageView) v.findViewById(R.id.image),SoftApplication.imageOptions);
        return v;
    }

}

下载图片需要的application

public class SoftApplication extends Application {  
    public static DisplayImageOptions imageOptions ;

    @Override
    public void onCreate() {
        super.onCreate();
        initImageLoader(getApplicationContext());
        //设置图片属性：下载时的图片，下载失败的图片，是否圆角
        imageOptions = new DisplayImageOptions.Builder().cacheInMemory(true).cacheOnDisc(true)
                .showImageOnLoading(R.drawable.default_loading)     // 加载开始默认的图片
                .showImageForEmptyUri(R.drawable.default_loading)   // url爲空會显示该图片，自己放在drawable里面的
                .showImageOnFail(R.drawable.default_loading)        // 加载图片出现问题，会显示该图片
                .imageScaleType(ImageScaleType.IN_SAMPLE_INT).bitmapConfig(Bitmap.Config.RGB_565).build();
    }
    public static void initImageLoader(Context context) {
        ImageLoaderConfiguration config = new ImageLoaderConfiguration.Builder(context)
                .threadPriority(Thread.NORM_PRIORITY - 2)
                .denyCacheImageMultipleSizesInMemory()
                .discCacheFileNameGenerator(new Md5FileNameGenerator())
                .tasksProcessingOrder(QueueProcessingType.LIFO)
                .writeDebugLogs() // Remove for release app
                .build();
        ImageLoader.getInstance().init(config);
    }   

}