Android实现QQ图片说说照片选择效果

 package com.shenhua.tabhostdemo.selectimg; import android.content.Context; import android.util.AttributeSet; import android.widget.RelativeLayout; /** * 自定义方形布局 * Created by Shenhua on 4/25/2016. */ public class SquareRelativeLayout extends RelativeLayout { public SquareRelativeLayout(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); } public SquareRelativeLayout(Context context, AttributeSet attrs) { super(context, attrs); } public SquareRelativeLayout(Context context) { super(context); } @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { setMeasuredDimension(getDefaultSize(0, widthMeasureSpec), getDefaultSize(0, heightMeasureSpec)); int childWidthSize = getMeasuredWidth(); widthMeasureSpec = MeasureSpec.makeMeasureSpec(childWidthSize, MeasureSpec.EXACTLY); heightMeasureSpec = widthMeasureSpec; super.onMeasure(widthMeasureSpec, heightMeasureSpec); } } 

 package com.shenhua.tabhostdemo.selectimg; import android.content.Intent; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.net.Uri; import android.os.Bundle; import android.support.annotation.Nullable; import android.support.v7.app.AppCompatActivity; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.AdapterView; import android.widget.BaseAdapter; import android.widget.CheckBox; import android.widget.GridView; import android.widget.ImageView; import android.widget.TextView; import android.widget.Toast; import com.shenhua.tabhostdemo.R; import java.io.ByteArrayOutputStream; import java.util.ArrayList; import java.util.List; /** * Created by shenhua on 4/25/2016. */ public class UploadPhotoActivity extends AppCompatActivity { private static final int IMG_COUNT = 8; private static final String IMG_ADD_TAG = "a"; private GridView gridView; private GVAdapter adapter; private TextView textView; private ImageView img; private List list; @Override protected void onCreate(@Nullable Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_add_photo); gridView = (GridView) findViewById(R.id.gridview); textView = (TextView) findViewById(R.id.send); textView.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { System.out.println("发送：" + Integer.toString(list.size() - 1)); upLoad(); } }); initData(); } private void upLoad() { Bitmap bitmap; Bitmap bmpCompressed; for (int i = 0; i (); list.add(IMG_ADD_TAG); } adapter = new GVAdapter(); gridView.setAdapter(adapter); gridView.setOnItemClickListener(new AdapterView.OnItemClickListener() { @Override public void onItemClick(AdapterView parent, View view, int position, long id) { if (list.get(position).equals(IMG_ADD_TAG)) { if (list.size() (); } if (adapter == null) { adapter = new GVAdapter(); } adapter.notifyDataSetChanged(); } private class GVAdapter extends BaseAdapter { @Override public int getCount() { return list.size(); } @Override public Object getItem(int position) { return null; } @Override public long getItemId(int position) { return 0; } @Override public View getView(final int position, View convertView, ViewGroup parent) { final ViewHolder holder; if (convertView == null) { convertView = LayoutInflater.from(getApplication()).inflate(R.layout.activity_add_photo_gv_items, parent, false); holder = new ViewHolder(); holder.imageView = (ImageView) convertView.findViewById(R.id.main_gridView_item_photo); holder.checkBox = (CheckBox) convertView.findViewById(R.id.main_gridView_item_cb); convertView.setTag(holder); } else { holder = (ViewHolder) convertView.getTag(); } String s = list.get(position); if (!s.equals(IMG_ADD_TAG)) { holder.checkBox.setVisibility(View.VISIBLE); holder.imageView.setImageBitmap(ImageTool.createImageThumbnail(s)); } else { holder.checkBox.setVisibility(View.GONE); holder.imageView.setImageResource(R.mipmap.ic_photo_upload); } holder.checkBox.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { list.remove(position); refreshAdapter(); } }); return convertView; } private class ViewHolder { ImageView imageView; CheckBox checkBox; } } @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { super.onActivityResult(requestCode, resultCode, data); if (data == null) { System.out.println("data null"); return; } if (requestCode == 0) { final Uri uri = data.getData(); String path = ImageTool.getImageAbsolutePath(this, uri); System.out.println(path); if (list.size() == IMG_COUNT) { removeItem(); refreshAdapter(); return; } removeItem(); list.add(path); list.add(IMG_ADD_TAG); refreshAdapter(); } } private void removeItem() { if (list.size() != IMG_COUNT) { if (list.size() != 0) { list.remove(list.size() - 1); } } } } 

 package com.shenhua.tabhostdemo.selectimg; import android.annotation.TargetApi; import android.app.Activity; import android.content.ContentUris; import android.content.Context; import android.database.Cursor; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.net.Uri; import android.os.Environment; import android.provider.DocumentsContract; import android.provider.MediaStore; /** * Created by shenhua on 4/26/2016. */ public class ImageTool { /** * 获取图片的绝对路径，需要添加用户权限 */ @TargetApi(19) public static String getImageAbsolutePath(Activity context, Uri imageUri) { if (context == null || imageUri == null) return null; if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.KITKAT && DocumentsContract.isDocumentUri(context, imageUri)) { if (isExternalStorageDocument(imageUri)) { String docId = DocumentsContract.getDocumentId(imageUri); String[] split = docId.split(":"); String type = split[0]; if ("primary".equalsIgnoreCase(type)) { return Environment.getExternalStorageDirectory() + "/" + split[1]; } } else if (isDownloadsDocument(imageUri)) { String id = DocumentsContract.getDocumentId(imageUri); Uri contentUri = ContentUris.withAppendedId(Uri.parse("content://downloads/public_downloads"), Long.valueOf(id)); return getDataColumn(context, contentUri, null, null); } else if (isMediaDocument(imageUri)) { String docId = DocumentsContract.getDocumentId(imageUri); String[] split = docId.split(":"); String type = split[0]; Uri contentUri = null; if ("image".equals(type)) { contentUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI; } else if ("video".equals(type)) { contentUri = null;//不获取视频 } else if ("audio".equals(type)) { contentUri = null;//不获取音频 } String selection = MediaStore.Images.Media._ID + "=?"; String[] selectionArgs = new String[]{split[1]}; return getDataColumn(context, contentUri, selection, selectionArgs); } } // MediaStore (and general) else if ("content".equalsIgnoreCase(imageUri.getScheme())) { if (isGooglePhotosUri(imageUri)) return imageUri.getLastPathSegment(); return getDataColumn(context, imageUri, null, null); } // File else if ("file".equalsIgnoreCase(imageUri.getScheme())) { return imageUri.getPath(); } return null; } public static String getDataColumn(Context context, Uri uri, String selection, String[] selectionArgs) { Cursor cursor = null; String column = MediaStore.Images.Media.DATA; String[] projection = {column}; try { cursor = context.getContentResolver().query(uri, projection, selection, selectionArgs, null); if (cursor != null && cursor.moveToFirst()) { int index = cursor.getColumnIndexOrThrow(column); return cursor.getString(index); } } finally { if (cursor != null) cursor.close(); } return null; } /** * @param uri The Uri to check. * @return Whether the Uri authority is ExternalStorageProvider. */ public static boolean isExternalStorageDocument(Uri uri) { return "com.android.externalstorage.documents".equals(uri.getAuthority()); } /** * @param uri The Uri to check. * @return Whether the Uri authority is DownloadsProvider. */ public static boolean isDownloadsDocument(Uri uri) { return "com.android.providers.downloads.documents".equals(uri.getAuthority()); } /** * @param uri The Uri to check. * @return Whether the Uri authority is MediaProvider. */ public static boolean isMediaDocument(Uri uri) { return "com.android.providers.media.documents".equals(uri.getAuthority()); } /** * @param uri The Uri to check. * @return Whether the Uri authority is Google Photos. */ public static boolean isGooglePhotosUri(Uri uri) { return "com.google.android.apps.photos.content".equals(uri.getAuthority()); } /** * 创建图片缩略图 * * @param filePath * @return */ public static Bitmap createImageThumbnail(String filePath) { Bitmap bitmap = null; BitmapFactory.Options opts = new BitmapFactory.Options(); opts.inJustDecodeBounds = true; BitmapFactory.decodeFile(filePath, opts); opts.inSampleSize = computeSampleSize(opts, -1, 128 * 128); opts.inJustDecodeBounds = false; try { bitmap = BitmapFactory.decodeFile(filePath, opts); } catch (Exception e) { // TODO: handle exception } return bitmap; } public static int computeSampleSize(BitmapFactory.Options options, int minSideLength, int maxNumOfPixels) { int initialSize = computeInitialSampleSize(options, minSideLength, maxNumOfPixels); int roundedSize; if (initialSize <= 8) { roundedSize = 1; while (roundedSize