Android之仿微信发朋友圈图片选择功能

最近项目中需要用到发表评论选择多张图片和拍照的功能，于是就仿照微信发表朋友圈的选择图片和拍照做了一个这样的案例，经过查找资料终于完成了此功能，

最近有时间就写出来和大家分享一下，希望对大家有所帮助。

效果如下图：

               

代码：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context="com.zq.weixinselectpicture.MainActivity">
    <EditText
        android:id="@+id/et_context"
        android:layout_width="match_parent"
        android:layout_height="166dp"
        android:background="@android:color/transparent"
        android:hint="| 输入要发布的内容"
        android:padding="5dp"
        android:textColorHint="@android:color/black"
        android:gravity="top"
        android:textColor="@android:color/black"
        />
    <GridView
        android:id="@+id/gridView"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:horizontalSpacing="@dimen/space_size"
        android:numColumns="3"
        android:verticalSpacing="@dimen/space_size" />

    <View
        android:layout_width="match_parent"
        android:layout_height="0.5dp"
        android:background="@color/colorGray"
        android:layout_marginTop="25px"
        ></View>
    <TextView
        android:id="@+id/find_comment_submit"
        android:layout_width="match_parent"
        android:layout_height="45dp"
        android:background="@drawable/border_red_roval_sign"
        android:gravity="center"
        android:textColor="@android:color/white"
        android:layout_marginLeft="25dp"
        android:layout_marginRight="25dp"
        android:layout_marginTop="25dp"
        android:text="确定"
        />
</LinearLayout>

Activity.java

public class MainActivity extends AppCompatActivity {

    private static final int REQUEST_CAMERA_CODE = 10;
    private static final int REQUEST_PREVIEW_CODE = 20;
    private ArrayList<String> imagePaths = new ArrayList<>();

    private GridView gridView;
    private GridAdapter gridAdapter;
    private TextView tv_click;
    private EditText textView;
    private String TAG =MainActivity.class.getSimpleName();

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        gridView = (GridView) findViewById(R.id.gridView);
        tv_click = (TextView) findViewById(R.id.find_comment_submit);
        textView= (EditText)findViewById(R.id.et_context);

        int cols = getResources().getDisplayMetrics().widthPixels / getResources().getDisplayMetrics().densityDpi;
        cols = cols < 3 ? 3 : cols;
        gridView.setNumColumns(cols);

        gridView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                String imgs = (String) parent.getItemAtPosition(position);
                if ("paizhao".equals(imgs) ){
                    PhotoPickerIntent intent = new PhotoPickerIntent(MainActivity.this);
                    intent.setSelectModel(SelectModel.MULTI);
                    intent.setShowCarema(true); // 是否显示拍照
                    intent.setMaxTotal(6); // 最多选择照片数量，默认为6
                    intent.setSelectedPaths(imagePaths); // 已选中的照片地址， 用于回显选中状态
                    startActivityForResult(intent, REQUEST_CAMERA_CODE);
                }else{
                    PhotoPreviewIntent intent = new PhotoPreviewIntent(MainActivity.this);
                    intent.setCurrentItem(position);
                    intent.setPhotoPaths(imagePaths);
                    startActivityForResult(intent, REQUEST_PREVIEW_CODE);
                }
            }
        });
        imagePaths.add("paizhao");
        gridAdapter = new GridAdapter(imagePaths);
        gridView.setAdapter(gridAdapter);
        tv_click.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
            }
        });
    }


    @Override
    protected void onResume() {
        super.onResume();
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if(resultCode == RESULT_OK) {
            switch (requestCode) {
                // 选择照片
                case REQUEST_CAMERA_CODE:
                    ArrayList<String> list = data.getStringArrayListExtra(PhotoPickerActivity.EXTRA_RESULT);
                    Log.d(TAG, "数量："+list.size());
                    loadAdpater(list);
                    break;
                // 预览
                case REQUEST_PREVIEW_CODE:
                    ArrayList<String> ListExtra = data.getStringArrayListExtra(PhotoPreviewActivity.EXTRA_RESULT);
                    loadAdpater(ListExtra);
                    break;
            }
        }
    }

    private void loadAdpater(ArrayList<String> paths){
        if (imagePaths!=null&& imagePaths.size()>0){
            imagePaths.clear();
        }
        if (paths.contains("paizhao")){
            paths.remove("paizhao");
        }
        paths.add("paizhao");
        imagePaths.addAll(paths);
        gridAdapter  = new GridAdapter(imagePaths);
        gridView.setAdapter(gridAdapter);
        try{
            JSONArray obj = new JSONArray(imagePaths);
        }catch (Exception e){
            e.printStackTrace();
        }
    }

    private class GridAdapter extends BaseAdapter {
        private ArrayList<String> listUrls;
        private LayoutInflater inflater;
        public GridAdapter(ArrayList<String> listUrls) {
            this.listUrls = listUrls;
            if(listUrls.size() == 7){
                listUrls.remove(listUrls.size()-1);
            }
            inflater = LayoutInflater.from(MainActivity.this);
        }

        public int getCount(){
            return  listUrls.size();
        }
        @Override
        public String getItem(int position) {
            return listUrls.get(position);
        }

        @Override
        public long getItemId(int position) {
            return position;
        }

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            ViewHolder holder = null;
            if (convertView == null) {
                holder = new ViewHolder();
                convertView = inflater.inflate(R.layout.item, parent,false);
                holder.image = (ImageView) convertView.findViewById(R.id.imageView);
                convertView.setTag(holder);
            } else {
                holder = (ViewHolder)convertView.getTag();
            }

            final String path=listUrls.get(position);
            if (path.equals("paizhao")){
                holder.image.setImageResource(R.mipmap.find_add_img);
            }else {
                Glide.with(MainActivity.this)
                        .load(path)
                        .placeholder(R.mipmap.default_error)
                        .error(R.mipmap.default_error)
                        .centerCrop()
                        .crossFade()
                        .into(holder.image);
            }
            return convertView;
        }
        class ViewHolder {
            ImageView image;
        }
    }
}

权限：

<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.INTERNET" />

在此希望大家可以通过该案例，能够去其糟粕，取其精华，能够帮助到大家就我就满足了。

修复版：

github下载：https://github.com/DickyQie/android-advanced-effect/tree/picture-selector