Android实现QQ图片说说照片选择效果

本文实例为大家分享了Android实现QQ图片说说照片选择的具体代码，供大家参考，具体内容如下

效果展示

布局文件

布局是很简单的，一个GridView，直接上布局：

layout/activity_add_photo.xml

<?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:orientation="vertical">

<RelativeLayout
 android:layout_width="match_parent"
 android:layout_height="60dp"
 android:background="#00BB9C">

<TextView
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:layout_centerInParent="true"
  android:text="写动态"
  android:textAppearance="?android:attr/textAppearanceLarge"
  android:textColor="@android:color/white" />

<TextView
  android:id="@+id/send"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:layout_alignParentRight="true"
  android:layout_centerVertical="true"
  android:layout_marginRight="10dp"
  android:text="发送"
  android:textAppearance="?android:attr/textAppearanceLarge"
  android:textColor="@android:color/white" />

</RelativeLayout>

<LinearLayout
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:layout_margin="16dp"
 android:orientation="vertical">

<EditText
  android:layout_width="match_parent"
  android:layout_height="100dp"
  android:enabled="false"
  android:focusable="false"
  android:gravity="top"
  android:hint="分享您的那点新鲜事儿..."
  android:maxLines="5" />

<LinearLayout
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:padding="5dp">

<GridView
   android:id="@+id/gridview"
   android:layout_width="match_parent"
   android:layout_height="wrap_content"
   android:numColumns="4" />

</LinearLayout>  

</LinearLayout>

</LinearLayout>

layout/activity_add_photo_gv_items.xml 使用了自定义的view使得布局为正方形

<?xml version="1.0" encoding="utf-8"?>
<com.shenhua.tabhostdemo.selectimg.SquareRelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content">

<ImageView
 android:id="@+id/main_gridView_item_photo"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:layout_centerInParent="true"
 android:contentDescription="@null"
 android:padding="5dp"
 android:scaleType="fitXY" />

<CheckBox
 android:id="@+id/main_gridView_item_cb"
 android:layout_width="20dp"
 android:layout_height="20dp"
 android:layout_alignParentEnd="true"
 android:layout_alignParentRight="true"
 android:layout_alignParentTop="true"
 android:layout_margin="2dp"
 android:background="@drawable/ic_delete"
 android:backgroundTint="#00BB9C"
 android:button="@null" />

</com.shenhua.tabhostdemo.selectimg.SquareRelativeLayout>

代码实现

SquareRelativeLayout.java：

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);
}
}

UploadPhotoActivity.java： 主Activity

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<String> 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.size() - 1; i++) {
  bitmap = BitmapFactory.decodeFile(list.get(i));
  bmpCompressed = Bitmap.createScaledBitmap(bitmap, 640, 480, true);
  ByteArrayOutputStream bos = new ByteArrayOutputStream();
  bmpCompressed.compress(Bitmap.CompressFormat.JPEG, 100, bos);
  byte[] data = bos.toByteArray();
  System.out.println(data);
 }

}

private void initData() {
 if (list == null) {
  list = new ArrayList<>();
  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() < IMG_COUNT) {
     Intent i = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
     startActivityForResult(i, 0);
    } else
     Toast.makeText(UploadPhotoActivity.this, "最多只能选择7张照片！", Toast.LENGTH_SHORT).show();
   }
  }
 });
 refreshAdapter();
}

private void refreshAdapter() {
 if (list == null) {
  list = new ArrayList<>();
 }
 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);
  }
 }
}

}

ImageTool.java： 图片工具类

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 < initialSize) {
   roundedSize <<= 1;
  }
 } else {
  roundedSize = (initialSize + 7) / 8 * 8;
 }
 return roundedSize;
}

private static int computeInitialSampleSize(BitmapFactory.Options options, int minSideLength, int maxNumOfPixels) {
 double w = options.outWidth;
 double h = options.outHeight;
 int lowerBound = (maxNumOfPixels == -1) ? 1 : (int) Math.ceil(Math.sqrt(w * h / maxNumOfPixels));
 int upperBound = (minSideLength == -1) ? 128 : (int) Math.min(Math.floor(w / minSideLength), Math.floor(h / minSideLength));
 if (upperBound < lowerBound) {
  // return the larger one when there is no overlapping zone.
  return lowerBound;
 }
 if ((maxNumOfPixels == -1) && (minSideLength == -1)) {
  return 1;
 } else if (minSideLength == -1) {
  return lowerBound;
 } else {
  return upperBound;
 }
}
}

因为 Android4.4以上版本获得的图片URI是com.xxxxx的，因此需要在工具类里做判断，否则得不到图片的绝对地址。

工具类参考了别人的一篇博客，忘了留博客地址了，请原博主谅解。

最后需要加上一个权限：

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

来源：http://blog.csdn.net/klxh2009/article/details/51254771