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+package com.usai.redant.raimage.PhotoList;
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+
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+import android.content.Context;
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+import android.content.Intent;
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+import android.graphics.Bitmap;
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+import android.graphics.BitmapFactory;
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+import android.support.v7.app.ActionBar;
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+import android.support.v7.app.AppCompatActivity;
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+import android.os.Bundle;
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+import android.support.v7.widget.DefaultItemAnimator;
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+import android.support.v7.widget.GridLayoutManager;
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+import android.support.v7.widget.RecyclerView;
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+import android.util.AttributeSet;
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+import android.util.Log;
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+import android.view.LayoutInflater;
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+import android.view.MenuItem;
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+import android.view.View;
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+import android.view.ViewGroup;
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+import android.widget.AbsListView;
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+import android.widget.BaseAdapter;
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+import android.widget.Button;
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+import android.widget.GridView;
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+import android.widget.ImageButton;
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+import android.widget.ImageView;
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+import android.widget.RelativeLayout;
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+import android.widget.SimpleAdapter;
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+import android.widget.Toast;
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+
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+import com.usai.redant.raimage.R;
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+
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+import java.io.File;
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+import java.io.Serializable;
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+import java.util.ArrayList;
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+import java.util.HashMap;
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+import java.util.Iterator;
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+
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+public class PhotoGridActivity extends AppCompatActivity {
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+
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+ private GridView gridView;
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+ private GridViewAdapter adapter;
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+ private Button deleteBtn;
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+ private ArrayList<HashMap<String,String>> photoDic;
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+
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+ @Override
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+ protected void onCreate(Bundle savedInstanceState) {
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+ super.onCreate(savedInstanceState);
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+ setContentView(R.layout.activity_photo_grid);
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+
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+ Intent intent = getIntent();
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+ ArrayList<String> photos = (ArrayList<String>) intent.getSerializableExtra("pic_list");
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+ photoDic = new ArrayList<HashMap<String, String>>();
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+ for (int i = 0; i < photos.size(); i++) { // 默认全部未选中
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+
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+ HashMap<String,String> dic = new HashMap<String, String>();
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+ dic.put("path",photos.get(i));
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+ dic.put("delete","0");
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+
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+ photoDic.add(dic);
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+ }
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+
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+
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+ gridView = (GridView) findViewById(R.id.photo_grid_view);
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+ deleteBtn = (Button)findViewById(R.id.grid_photo_delete_btn);
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+
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+ deleteBtn.setOnClickListener(new View.OnClickListener() {
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+ @Override
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+ public void onClick(View v) {
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+
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+ Iterator<HashMap<String,String>> iterator = photoDic.iterator();
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+ while (iterator.hasNext()) {
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+ HashMap<String,String> item = iterator.next();
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+ int delete = Integer.valueOf(item.get("delete"));
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+ if (delete == 1) {
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+ // 删除文件
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+ new File(item.get("path")).delete();
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+ iterator.remove();
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+ int index = photoDic.indexOf(item);
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+ }
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+ }
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+ adapter.notifyDataSetChanged();
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+
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+ }
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+ });
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+
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+
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+ int h = getWindowManager().getDefaultDisplay().getHeight();
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+ int w = getWindowManager().getDefaultDisplay().getWidth();
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+
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+
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+
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+ // 设置Adapter
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+ gridView.setAdapter(adapter = new GridViewAdapter());
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+
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+
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+ /**Action Bar*/
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+ ActionBar mActionBar = getSupportActionBar();
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+ mActionBar.setHomeButtonEnabled(true);
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+ mActionBar.setDisplayHomeAsUpEnabled(true);
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+ mActionBar.setTitle("RA Image");
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+ }
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+
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+ @Override
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+ public boolean onOptionsItemSelected(MenuItem item) {
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+ switch (item.getItemId()) {
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+ case android.R.id.home: {
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+ finish();
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+ }
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+ break;
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+ }
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+ return true;
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+ }
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+
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+ private void showPhotoPreview(int index) {
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+ ArrayList<String> photos = new ArrayList<String>();
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+ Iterator<HashMap<String,String>> iterator = photoDic.iterator();
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+ while (iterator.hasNext()) {
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+ HashMap<String,String> item = iterator.next();
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+ photos.add(item.get("path"));
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+ }
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+// Toast.makeText(PhotoGridActivity.this,"Click" + index,Toast.LENGTH_LONG).show();
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+ Intent intent = new Intent(this,NewPhotoPreviewActivity.class);
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+ intent.putExtra("photos",(Serializable)photos);
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+ intent.putExtra("index",index);
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+ startActivity(intent);
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+ }
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+
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+
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+
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+ /**缩小图片*/
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+ public Bitmap scaleImage(String path,int width,int height) {
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+ Bitmap source = BitmapFactory.decodeFile(path);
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+
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+// int originWidth = source.getWidth();
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+// int originHeight = source.getHeight();
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+//
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+// int width = originWidth, height = originHeight;
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+//
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+// if (originHeight > 1024 || originWidth > 1024)
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+// {
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+// if (originWidth > originHeight)
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+// {
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+// width = 1024;
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+// height = originHeight * 1024 / originWidth;
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+//
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+// }
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+// else
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+// {
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+//
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+// height = 1024;
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+// width = originWidth * 1024 / originHeight;
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+//
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+// }
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+// }
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+ Bitmap scaled = Bitmap.createScaledBitmap(source, width, height, true);
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+ return scaled;
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+ }
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+
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+
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+ /**Adapter*/
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+ private class GridViewAdapter extends BaseAdapter {
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+
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+ private class PhotoViewHolder {
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+ public ImageView photoView;
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+ public ImageButton checkBtn;
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+
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+ public PhotoViewHolder(View view) {
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+ photoView = (ImageView)view.findViewById(R.id.photo_list_iv);
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+ checkBtn = (ImageButton)view.findViewById(R.id.photo_list_checkBtn);
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+ }
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+ }
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+
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+
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+ @Override
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+ public int getCount() {
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+ return photoDic.size();
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+ }
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+
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+ @Override
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+ public Object getItem(int position) {
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+ return position;
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+ }
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+
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+ @Override
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+ public long getItemId(int position) {
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+ return position;
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+ }
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+
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+ @Override
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+ public View getView(int position, View convertView, ViewGroup parent) {
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+
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+ PhotoViewHolder holder = null;
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+ View cell;
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+ if (convertView == null) {
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+ cell = (View) LayoutInflater.from(PhotoGridActivity.this).inflate(R.layout.photo_list_item,null);
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+ holder = new PhotoViewHolder(cell);
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+ cell.setTag(holder);
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+ } else {
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+ cell = convertView;
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+ holder = (PhotoViewHolder)cell.getTag();
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+ }
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+
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+
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+
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+ final HashMap<String,String> item = photoDic.get(position);
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+ String path = item.get("path");
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+
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+
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+ Bitmap bitmap = scaleImage(path,200,200);
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+
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+ holder.photoView.setImageBitmap(bitmap);
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+
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+ holder.checkBtn.setBackgroundDrawable(getResources().getDrawable(R.drawable.check_none));
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+
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+ int delete = Integer.valueOf(item.get("delete"));
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+ if (delete == 1) {
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+ holder.checkBtn.setBackgroundDrawable(getResources().getDrawable(R.drawable.check_check));
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+ }
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+
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+ final int idx = position;
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+ holder.checkBtn.setOnClickListener(new View.OnClickListener() {
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+ @Override
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+ public void onClick(View v) {
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+ ImageButton checkBtn = (ImageButton)v;
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+ checkBtn.setSelected(!checkBtn.isSelected());
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+ if (checkBtn.isSelected()) {
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+ checkBtn.setBackgroundDrawable(getResources().getDrawable(R.drawable.check_check));
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+ item.put("delete","1");
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+ photoDic.set(idx,item);
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+ } else {
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+ checkBtn.setBackgroundDrawable(getResources().getDrawable(R.drawable.check_none));
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+ item.put("delete","0");
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+ photoDic.set(idx,item);
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+ }
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+ }
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+ });
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+
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+ holder.photoView.setOnClickListener(new View.OnClickListener() {
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+ @Override
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+ public void onClick(View v) {
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+ showPhotoPreview(idx);
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+ }
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+ });
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+
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+
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+
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+ /**解决Item被拉伸压缩*/
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+ int itemWidth = (int)(getResources().getDisplayMetrics().widthPixels - 4 * 10) / 3;
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+ int itemHeight = itemWidth;
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+
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+ AbsListView.LayoutParams param = (AbsListView.LayoutParams) cell.getLayoutParams();
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+
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+ if (param == null) {
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+ /**解决第一个Item不响应*/
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+ param = new AbsListView.LayoutParams(itemWidth, itemHeight);
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+ } else {
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+ param.width = itemWidth;
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+ param.height = itemHeight;
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+ }
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+ cell.setLayoutParams(param);
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+
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+ return cell;
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+ }
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+
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+
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+ }
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+}
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Pen Li