Android(安卓)添加多张图片。

先看效果图。

直接上代码。主要是Adapter这边。

public class GvAdapter extends BaseAdapter{    private Context context;    private int mMaxPosition;//根据这个list.size+1 来进行判断    private List list;    public GvAdapter(Context context, List list) {        this.context = context;        this.list = list;    }    @Override    public int getCount() {        mMaxPosition=list.size()+1;        return mMaxPosition;    }    //根据情况可以设置是否需要。。    public int getMaxPosition(){        return mMaxPosition;    }    @Override    public Object getItem(int position) {        return list.get(position);    }    @Override    public long getItemId(int position) {        return position;    }    @Override    public View getView(final int position, View v, ViewGroup            parent) {        ViewHolder vh=null;        if (v==null){            vh=new ViewHolder();            v= LayoutInflater.from(context).inflate(R.layout.item_gd,parent,false);            vh.img= (ImageView) v.findViewById(R.id.img);            vh.demimg= (ImageView) v.findViewById(R.id.delimg);            v.setTag(vh);        }else{            vh= (ViewHolder) v.getTag();        }        if (position==mMaxPosition-1){ //说明要显示            Glide.with(context).load(R.drawable.id_photo).dontAnimate()                    .centerCrop().into(vh.img);            vh.img.setVisibility(View.VISIBLE);            vh.demimg.setVisibility(View.GONE);            if (position==6&&mMaxPosition==7){//设置最大6个。那么达到最大，就隐藏。//                vh.img.setImageResource(R.drawable.id_photo);                vh.img.setVisibility(View.GONE);            }        }else{//设置图片。            vh.demimg.setVisibility(View.VISIBLE);            Glide.with(context).load(list.get(position)).into(vh.img);//设置        }        //删除        vh.demimg.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                list.remove(position);                notifyDataSetChanged();            }        });        return v;    }    public class ViewHolder{        public ImageView img,demimg;    }

//这里引用了一个很好用的相册框架

 //相册    compile 'com.linchaolong.android:imagepicker:1.2'//加载    compile 'com.github.bumptech.glide:glide:3.8.0'

public class MainActivity extends AppCompatActivity {    private GridView gridView;    private GvAdapter adapter;    private List list;    ImagePicker imagePicker ;    String path;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        gridView = (GridView) findViewById(R.id.grid_view);        initView();    }    private void initView() {        imagePicker = new ImagePicker();        // 设置标题        imagePicker.setTitle("设置头像");        // 设置是否裁剪图片        imagePicker.setCropImage(true);        list = new ArrayList<>();        adapter = new GvAdapter(this, list);        gridView.setAdapter(adapter);        gridView.setOnItemClickListener(new AdapterView                .OnItemClickListener() {            @Override            public void onItemClick(AdapterView<?> parent, View                    view, int position, long id) {                //判断是否是最后一个。                if (position==parent.getChildCount()-1){                    if (position==6){//不能点击了                    }else{                        opnePhoto();                    }                }else{//可以加点预览功能。                }            }        });    }    public void opnePhoto() {        // 启动图片选择器        imagePicker.startChooser(this, new ImagePicker.Callback() {            // 选择图片回调            @Override            public void onPickImage(Uri imageUri) {            }            // 裁剪图片回调            @Override            public void onCropImage(Uri imageUri) {                if (list.size()>=6){                    Toast.makeText(MainActivity.this,"最多选择六张图片",Toast.LENGTH_LONG).show();                }else{                    list.add(String.valueOf(imageUri));                }                adapter.notifyDataSetChanged();//                path= String.valueOf(imageUri);            }            // 自定义裁剪配置            @Override            public void cropConfig(CropImage.ActivityBuilder                                           builder) {                builder                        // 是否启动多点触摸                        .setMultiTouchEnabled(false)                        // 设置网格显示模式                        .setGuidelines(CropImageView.Guidelines.OFF)                        // 圆形/矩形                        .setCropShape(CropImageView.CropShape                                .RECTANGLE)                        // 调整裁剪后的图片最终大小                        .setRequestedSize(960, 540)                        // 宽高比                        .setAspectRatio(16, 9);            }            // 用户拒绝授权回调            @Override            public void onPermissionDenied(int requestCode,                                           String[] permissions,                                           int[] grantResults) {            }        });    }    @Override    protected void onActivityResult(int requestCode, int            resultCode, Intent data) {        super.onActivityResult(requestCode, resultCode, data);        imagePicker.onActivityResult(MainActivity.this,requestCode, resultCode, data);    }}

这是xml界面

<?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:orientation="vertical"    android:layout_height="match_parent"    android:paddingBottom="@dimen/activity_vertical_margin"    android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    tools:context="theagent.com.photo.MainActivity">    <TextView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="Hello World!"/>    <GridView        android:id="@+id/grid_view"        android:numColumns="4"        android:layout_width="match_parent"        android:layout_height="wrap_content">    GridView>LinearLayout>

这里是demo下载

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