[Android] 通过GridView仿微信动态添加本地图片示例代码

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"   xmlns:tools="http://schemas.android.com/tools"   android:id="@+id/container"   android:layout_width="match_parent"   android:layout_height="match_parent"   tools:context="com.example.suishoupaipublish.MainActivity"   tools:ignore="MergeRootFrame" >      <!-- 顶部添加文字 -->    <RelativeLayout      android:id="@+id/Layout_top"      android:orientation="horizontal"       android:layout_width="fill_parent"      android:layout_height="40dp"      android:layout_marginTop="5dp"     android:layout_alignParentTop="true"      android:gravity="center">      <TextView        android:layout_width="fill_parent"         android:layout_height="wrap_content"         android:textSize="25sp"       android:gravity="center"       android:text="发布信息" />    </RelativeLayout>    <!-- 底部按钮 -->    <RelativeLayout      android:id="@+id/Layout_bottom"       android:layout_alignParentBottom="true"     android:layout_width="fill_parent"       android:layout_height="50dp"     android:gravity="center" >      <Button        android:id="@+id/button1"        android:layout_width="wrap_content"        android:layout_height="fill_parent"       android:textSize="20sp"       android:text="发布拍拍" />      <Button        android:id="@+id/button2"        android:layout_width="wrap_content"        android:layout_height="fill_parent"       android:layout_toRightOf="@+id/button1"       android:textSize="20sp"       android:text="取消发布" />   </RelativeLayout>    <!-- 显示图片 -->    <RelativeLayout      android:id="@+id/Content_Layout"        android:layout_width="fill_parent"       android:layout_height="fill_parent"      android:layout_above="@id/Layout_bottom"       android:layout_below="@id/Layout_top"       android:gravity="center">        <LinearLayout         android:layout_width="match_parent"        android:layout_height="match_parent"        android:orientation="vertical"       android:layout_alignParentBottom="true" >        <!-- 设置运行多行 设置圆角图形 黑色字体-->       <EditText          android:id="@+id/editText1"         android:layout_height="120dp"         android:layout_width="fill_parent"         android:textColor="#000000"         android:layout_margin="12dp"         android:textSize="20sp"         android:hint="随手说出你此刻的心声..."         android:maxLength="500"         android:singleLine="false"         android:background="@drawable/editview_shape" />       <!-- 网格显示图片 行列间距5dp 每列宽度90dp -->       <GridView         android:id="@+id/gridView1"         android:layout_width="fill_parent"         android:layout_height="200dp"         android:layout_margin="10dp"         android:background="#EFDFDF"         android:horizontalSpacing="5dp"         android:verticalSpacing="5dp"         android:numColumns="4"         android:columnWidth="90dp"         android:stretchMode="columnWidth"         android:gravity="center" >       </GridView>       <TextView          android:layout_width="fill_parent"         android:layout_height="wrap_content"         android:text="(友情提示:只能添加9张图片,长按图片可以删除已添加图片)"         android:gravity="center" />     </LinearLayout>   </RelativeLayout>    </RelativeLayout> 

<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"   android:layout_width="match_parent"   android:layout_height="match_parent"   android:gravity="center"   android:descendantFocusability="blocksDescendants"   android:orientation="vertical" >   <RelativeLayout     android:layout_gravity="center"     android:layout_width="80dp"     android:layout_height="80dp"     android:orientation="vertical" >     <ImageView       android:layout_marginTop="10dp"       android:layout_marginRight="10dp"       android:id="@+id/imageView1"       android:layout_width="fill_parent"       android:layout_height="fill_parent"       android:scaleType="fitXY"       android:src="@drawable/gridview_addpic" />   </RelativeLayout> </LinearLayout> 

<?xml version="1.0" encoding="utf-8"?> <shape xmlns:android="http://schemas.android.com/apk/res/android"    android:shape="rectangle"    android:padding="10dp">   <!-- 填充editView的颜色 -->   <soild android:color="#ffffff"/>   <!-- 设置圆角的弧度，radius半径越大，editView的边角越圆 -->   <corners      android:radius="15dp"     android:bottomRightRadius="15dp"     android:bottomLeftRadius="15dp"     android:topLeftRadius="15dp"      android:topRightRadius="15dp"/>   <stroke     android:color="#32CD32"      android:width="4px" />  </shape> 

public class MainActivity extends Activity {    private GridView gridView1;       //网格显示缩略图   private Button buttonPublish;      //发布按钮   private final int IMAGE_OPEN = 1;    //打开图片标记   private String pathImage;        //选择图片路径   private Bitmap bmp;           //导入临时图片   private ArrayList<HashMap<String, Object>> imageItem;   private SimpleAdapter simpleAdapter;   //适配器      @Override   protected void onCreate(Bundle savedInstanceState) {     super.onCreate(savedInstanceState);     setContentView(R.layout.activity_main);     /*      * 防止键盘挡住输入框      * 不希望遮挡设置activity属性 android:windowSoftInputMode="adjustPan"      * 希望动态调整高度 android:windowSoftInputMode="adjustResize"      */     getWindow().setSoftInputMode(WindowManager.LayoutParams.         SOFT_INPUT_ADJUST_PAN);     //锁定屏幕     setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);     setContentView(R.layout.activity_main);     //获取控件对象     gridView1 = (GridView) findViewById(R.id.gridView1);      /*      * 载入默认图片添加图片加号      * 通过适配器实现      * SimpleAdapter参数imageItem为数据源 R.layout.griditem_addpic为布局      */     //获取资源图片加号     bmp = BitmapFactory.decodeResource(getResources(), R.drawable.gridview_addpic);     imageItem = new ArrayList<HashMap<String, Object>>();     HashMap<String, Object> map = new HashMap<String, Object>();     map.put("itemImage", bmp);     imageItem.add(map);     simpleAdapter = new SimpleAdapter(this,          imageItem, R.layout.griditem_addpic,          new String[] { "itemImage"}, new int[] { R.id.imageView1});      /*      * HashMap载入bmp图片在GridView中不显示,但是如果载入资源ID能显示 如      * map.put("itemImage", R.drawable.img);      * 解决方法:      *       1.自定义继承BaseAdapter实现      *       2.ViewBinder()接口实现      */     simpleAdapter.setViewBinder(new ViewBinder() {        @Override        public boolean setViewValue(View view, Object data,            String textRepresentation) {          // TODO Auto-generated method stub          if(view instanceof ImageView && data instanceof Bitmap){            ImageView i = (ImageView)view;            i.setImageBitmap((Bitmap) data);            return true;          }          return false;        }     });      gridView1.setAdapter(simpleAdapter);          /*      * 监听GridView点击事件      * 报错:该函数必须抽象方法 故需要手动导入import android.view.View;      */     gridView1.setOnItemClickListener(new OnItemClickListener() {       @Override       public void onItemClick(AdapterView<?> parent, View v, int position, long id)       {         if( imageItem.size() == 10) { //第一张为默认图片           Toast.makeText(MainActivity.this, "图片数9张已满", Toast.LENGTH_SHORT).show();         }         else if(position == 0) { //点击图片位置为+ 0对应0张图片           Toast.makeText(MainActivity.this, "添加图片", Toast.LENGTH_SHORT).show();           //选择图片           Intent intent = new Intent(Intent.ACTION_PICK,                   android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);            startActivityForResult(intent, IMAGE_OPEN);            //通过onResume()刷新数据         }         else {           dialog(position);           //Toast.makeText(MainActivity.this, "点击第"+(position + 1)+" 号图片",            //   Toast.LENGTH_SHORT).show();         }       }     });    }      //获取图片路径 响应startActivityForResult    protected void onActivityResult(int requestCode, int resultCode, Intent data) {      super.onActivityResult(requestCode, resultCode, data);         //打开图片      if(resultCode==RESULT_OK && requestCode==IMAGE_OPEN) {           Uri uri = data.getData();        if (!TextUtils.isEmpty(uri.getAuthority())) {          //查询选择图片          Cursor cursor = getContentResolver().query(              uri,              new String[] { MediaStore.Images.Media.DATA },              null,               null,               null);          //返回 没找到选择图片          if (null == cursor) {            return;          }          //光标移动至开头 获取图片路径          cursor.moveToFirst();          pathImage = cursor.getString(cursor              .getColumnIndex(MediaStore.Images.Media.DATA));        }     } //end if 打开图片   }      //刷新图片   @Override   protected void onResume() {     super.onResume();     if(!TextUtils.isEmpty(pathImage)){       Bitmap addbmp=BitmapFactory.decodeFile(pathImage);       HashMap<String, Object> map = new HashMap<String, Object>();       map.put("itemImage", addbmp);       imageItem.add(map);       simpleAdapter = new SimpleAdapter(this,            imageItem, R.layout.griditem_addpic,            new String[] { "itemImage"}, new int[] { R.id.imageView1});        simpleAdapter.setViewBinder(new ViewBinder() {          @Override          public boolean setViewValue(View view, Object data,              String textRepresentation) {            // TODO Auto-generated method stub            if(view instanceof ImageView && data instanceof Bitmap){              ImageView i = (ImageView)view;              i.setImageBitmap((Bitmap) data);              return true;            }            return false;          }       });        gridView1.setAdapter(simpleAdapter);       simpleAdapter.notifyDataSetChanged();       //刷新后释放防止手机休眠后自动添加       pathImage = null;     }   }      /*    * Dialog对话框提示用户删除操作    * position为删除图片位置    */   protected void dialog(final int position) {     AlertDialog.Builder builder = new Builder(MainActivity.this);     builder.setMessage("确认移除已添加图片吗？");     builder.setTitle("提示");     builder.setPositiveButton("确认", new DialogInterface.OnClickListener() {       @Override       public void onClick(DialogInterface dialog, int which) {         dialog.dismiss();         imageItem.remove(position);         simpleAdapter.notifyDataSetChanged();       }     });     builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {       @Override       public void onClick(DialogInterface dialog, int which) {         dialog.dismiss();         }       });     builder.create().show();   }  } 

<!-- 申明网络权限 --> <uses-permission android:name="android.permission.INTERNET" /> <!-- 申明权限 操作SD卡 -->  <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />