Android自定义动态布局 — 多图片上传

Android自定义动态布局 — 多图片上传

本文介绍Android中动态布局添加图片，多图片上传。

项目中效果图：

技术点：

1.动态添加格局中的线条和添加图片的+号

2.多张图片异步上传

首先来看一下布局文件：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#f2f2f2" >

    <LinearLayout
        android:id="@+id/layout_CONTENT"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="#f2f2f2"
        android:orientation="vertical"
        android:padding="5dp" >

        <!-- 布局由程序动态生成 -->

        <LinearLayout
            android:id="@+id/layout_container"
            android:layout_width="300dp"
            android:layout_height="wrap_content"
            android:layout_gravity="center_horizontal"
            android:layout_margin="5dp"
            android:background="#cbcbcb"
            android:orientation="vertical"
            android:padding="0.2px" />

        <TextView
            android:id="@+id/text_no_data"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_margin="20dp"
            android:text="@string/text_picture_upload"
            android:textSize="16dp" />
    </LinearLayout>

</LinearLayout>

布局很简单，主要是id为layout_container的一个LinearLayout作为父布局。

横向的线条和纵向的线条布局也很简单：

<View xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="1px"
    android:background="#cbcbcb" />

<View xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="1px"
    android:layout_height="match_parent"
    android:background="#cbcbcb" />

下面是动态生成布局的实现方式：

private void initUI() {
        setContentView(R.layout.activity_main);
        //setTitle(R.string.button_service_upload_picture);
        //showBackwardView(R.string.button_backward, true);
        //showForwardView(R.string.button_upload,true);

        //最顶层父布局
        mLayout = (ViewGroup) findViewById(R.id.layout_container);

        final int count = 9;    //9格
        final int rowCount = (count + 2) / 3;

        for (int i = 0; i < rowCount; i++) {

            if (i != 0) {
                //加载横向布局线条
                View.inflate(this, R.layout.layout_line_horizonal, mLayout);
            }
            //创建布局对象，设置按下颜色
            final LinearLayout linearLayout = new LinearLayout(this);
            linearLayout.setBackgroundResource(R.drawable.row_selector);

            for (int j = 0; j < 3; j++) {

                if (j != 0) {
                    //加载内层纵向布局线条
                    View.inflate(this, R.layout.layout_line_vertical, linearLayout);
                }

                ImageButton imageButton = new ImageButton(this);
                imageButton.setBackgroundResource(R.drawable.row_selector);
                imageButton.setTag(TAG);
                imageButton.setOnClickListener(this);
                imageButton.setEnabled(false);
                LinearLayout.LayoutParams layoutParams =
                        new LinearLayout.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT, 1.0f);
                //添加到linearLayout布局中
                linearLayout.addView(imageButton, layoutParams);

                //将imageButton对象添加到列表
                mImageButtonList.add(imageButton);
            }

            DisplayManager manager = DisplayManager.getInstance();
            LayoutParams layoutParams = new LayoutParams(LayoutParams.MATCH_PARENT, manager.dipToPixel(100));
            //将View添加到总父布局
            mLayout.addView(linearLayout, layoutParams);
        }
        //外层设置ImageButton属性
        final ImageButton currentImageButton = mImageButtonList.get(mCurrent);
        currentImageButton.setImageResource(R.drawable.ic_add_picture);
        currentImageButton.setScaleType(ScaleType.CENTER);
        currentImageButton.setEnabled(true);

    }

图片上传功能：

 private class UploadPictureTask extends AsyncTask<List<String>, Integer, String> {

        /* (non-Javadoc)
         * @see android.os.AsyncTask#doInBackground(Params[])
         */
        @Override
        protected String doInBackground(List<String>... params) {
            final List<String> pictureList = params[0];
            for (int i = 0, len = pictureList.size(); i < len; i++) {
                final File file = new File(pictureList.get(i));
                //final String response = ApacheHttpUtils.post(mUrlPrefix + "/upload", new File[] {file});
                // 解析，存储
                //final UploadInfo upload = new UploadParser().parse(response).getData();
                /*if (upload != null) {
                    final String url = upload.getUrl();
                    if (url != null) {
                        mPictureUrlList.add(url);
                    }
                }*/
                publishProgress(i);
            }
            return null;
        }

        /* (non-Javadoc)
         * @see android.os.AsyncTask#onProgressUpdate(Progress[])
         */
        @Override
        protected void onProgressUpdate(Integer... values) {

        }

        /* (non-Javadoc)
         * @see android.os.AsyncTask#onPostExecute(java.lang.Object)
         */
        @Override
        protected void onPostExecute(String result) {
            //addPictures();
            super.onPostExecute(result);
        }
    }

注：类中声明了三个列表去保存之前所操作的记录

mImageButtonList = new ArrayList<ImageButton>();
        mPicturePathList = new ArrayList<String>();
        mPictureUrlList = new ArrayList<String>();

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