Android 拍照、压缩、水平滚动、删除

最近在项目中要搞个照片，水平方向的滚动，点击可以删除，并且支持压缩。

具体如下：

package com.example.zdd.photoutils;import android.app.Activity;import android.content.DialogInterface;import android.content.Intent;import android.content.res.Resources;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.net.Uri;import android.os.Bundle;import android.os.Environment;import android.os.Handler;import android.os.Message;import android.provider.MediaStore;import android.support.v7.app.AlertDialog;import android.support.v7.app.AppCompatActivity;import android.view.View;import android.widget.AdapterView;import android.widget.Button;import com.example.zdd.photoutils.adapter.BusinessSginImageViewAdapter;import com.example.zdd.photoutils.utils.HorizontalListView;import com.example.zdd.photoutils.utils.ToastUtil;import com.example.zdd.photoutils.utils.ZipUtils;import java.io.File;import java.io.FileOutputStream;import java.io.IOException;import java.text.SimpleDateFormat;import java.util.ArrayList;import java.util.Date;import java.util.List;public class MainActivity extends AppCompatActivity implements View.OnClickListener{    private HorizontalListView rphoto_horizon_listview;    private Button zipFile;    private BusinessSginImageViewAdapter businessSginImageViewAdapter;    /**     * 签到图片、文档保存地址     */    public static final String SGIN_SAVE_DIR = Environment            .getExternalStorageDirectory().toString() + "/PhotoUtils/photos";    public static final String SGIN_PHOTONAME = "yyyyMMddHHmmss";   //照片格式    private File photoFile = null; //照片路径    private String PhotoPath = null;     //照片存储路径    private File zipphotoFile = null; //压缩包路径    private String ZipPhotoPath = null;  //压缩包的路径    private String PhotoName = "";      // 照片名称(照片保存在SD卡机的要加反斜杠)    private List<Bitmap> bitmap_list = new ArrayList<>();       //存放照片的集合    private List<String> PhotoPath_List = new ArrayList<>();    // 照片路径集合,上传字段是可以用    public static final int ZIPPHOTO = 0;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        init();    }    private void init() {        rphoto_horizon_listview = (HorizontalListView) findViewById(R.id.photo_horizon_listview);        zipFile = (Button) findViewById(R.id.zipFile);        zipFile.setOnClickListener(this);        //确保集合为空        bitmap_list.clear();        Resources res = getResources();        Bitmap mBitmap = BitmapFactory.decodeResource(res, R.mipmap.photo_image);        bitmap_list.add(mBitmap);        businessSginImageViewAdapter = new BusinessSginImageViewAdapter(                bitmap_list, this);        businessSginImageViewAdapter.notifyDataSetChanged();        rphoto_horizon_listview.setAdapter(businessSginImageViewAdapter);        rphoto_horizon_listview.setOnItemClickListener(clickListener);        //确保文件内没有照片        photoFile = new File(SGIN_SAVE_DIR);        if (photoFile.exists()) {            String[] strings = photoFile.list();            for (int i = 0; i < strings.length; i++) {                File delFile = new File(SGIN_SAVE_DIR + "/" + strings[i]);                delFile.delete();            }        } else {            photoFile.mkdirs();        }    }    private AdapterView.OnItemClickListener clickListener = new AdapterView.OnItemClickListener() {        @Override        public void onItemClick(AdapterView<?> parent, View view, int position,                                long id) {            if (position == bitmap_list.size() - 1) {                ShowPickDialog();            } else {                ShowSginPhotoFeleteDialog(position);            }        }    };    private void ShowPickDialog() {        // 获取当前时间        SimpleDateFormat formatter = new SimpleDateFormat(SGIN_PHOTONAME);        Date curDate = new Date(System.currentTimeMillis());        PhotoName = formatter.format(curDate);        PhotoPath = SGIN_SAVE_DIR + "/" + PhotoName + ".jpg";        PhotoPath_List.add(PhotoPath);        File photoFile = new File(PhotoPath);        // 跳转相机        Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);        intent.putExtra(MediaStore.EXTRA_OUTPUT,                Uri.fromFile(photoFile));        startActivityForResult(intent, Activity.DEFAULT_KEYS_DIALER);    }    @Override    protected void onActivityResult(int requestCode, int resultCode, Intent data) {        super.onActivityResult(requestCode, resultCode, data);        if (resultCode != RESULT_OK) {            ToastUtil.ShowLong(this, "照片获取失败请重试...");            bitmap_list.clear();            Resources res = getResources();            Bitmap mBitmap = BitmapFactory.decodeResource(res, R.mipmap.photo_image);            bitmap_list.add(mBitmap);            return;        }        switch (requestCode) {            case Activity.DEFAULT_KEYS_DIALER: {                try {                    File photoSavePah = new File(PhotoPath);                    Bitmap decodeBitmap = decodeBitmap(photoSavePah);                    decodeBitmap.compress(Bitmap.CompressFormat.JPEG, 60,                            new FileOutputStream(photoSavePah));                    bitmap_list.add(bitmap_list.size() - 1, decodeBitmap);                    setHandlerInfo(ZIPPHOTO, bitmap_list);                } catch (IOException e) {                    e.printStackTrace();                }                break;            }        }    }    public Bitmap decodeBitmap(File file) {        BitmapFactory.Options options = new BitmapFactory.Options();        options.inJustDecodeBounds = true;        // 获取图片的宽和高        Bitmap bitmap = BitmapFactory.decodeFile(file.getPath(), options);        float realWidth = options.outWidth;        float realHeight = options.outHeight;        // 缩放比        int scale = (int) ((realHeight > realWidth ? realHeight : realWidth) / 800);        if (scale <= 0) {            scale = 1;        }        options.inSampleSize = scale;        options.inJustDecodeBounds = false;        // 注意这次要把options.inJustDecodeBounds 设为 false,这次图片是要读取出来的。        bitmap = BitmapFactory.decodeFile(file.getPath(), options);        int w = bitmap.getWidth();        int h = bitmap.getHeight();        return bitmap;    }    /**     * 提示是否删除照片     */    private void ShowSginPhotoFeleteDialog(final int position) {        new AlertDialog.Builder(this).setTitle("提示").setMessage("是否删除当前照片?")                .setNegativeButton("确定", new DialogInterface.OnClickListener() {                    public void onClick(DialogInterface dialog, int which) {                        bitmap_list.remove(position);                        businessSginImageViewAdapter.notifyDataSetChanged();                        String sginPath = PhotoPath_List.get(position);                        File file = new File(sginPath);                        if (file.exists()) {                            if (file.delete()) {                                PhotoPath_List.remove(position);                            }                        }                    }                }).setPositiveButton("取消", new DialogInterface.OnClickListener() {            public void onClick(DialogInterface dialog, int whichButton) {            }        }).show();    }    /**     * 弹框、上传、提示     */    private Handler mHandler = new Handler() {        @Override        public void handleMessage(Message msg) {            super.handleMessage(msg);            switch (msg.what) {                case ZIPPHOTO:                    List<Bitmap> sginlocathListBp = (List<Bitmap>) msg.obj;                    addImageView(sginlocathListBp);                    break;                default:                    break;            }        }    };    private void addImageView(List<Bitmap> bitmapList) {        businessSginImageViewAdapter = new BusinessSginImageViewAdapter(                bitmapList, this);        businessSginImageViewAdapter.notifyDataSetChanged();        rphoto_horizon_listview.setAdapter(businessSginImageViewAdapter);        rphoto_horizon_listview.setOnItemClickListener(clickListener);    }    /**     * 消息发送     */    private void setHandlerInfo(int sginType, Object content) {        // 发送消息        Message msg = new Message();        msg.what = sginType;        msg.obj = content;        mHandler.sendMessage(msg);    }    @Override    protected void onDestroy() {        super.onDestroy();        //确保程序在返回的时候删除本地的数据        if (photoFile.exists()) {            String[] strings = photoFile.list();            for (int i = 0; i < strings.length; i++) {                File delFile = new File(SGIN_SAVE_DIR + "/" + strings[i]);                delFile.delete();            }        }    }    @Override    public void onClick(View v) {        switch (v.getId()){            case R.id.zipFile:                if(bitmap_list.size()>0){                    List<File> files = new ArrayList<File>();                    ZipPhotoPath = SGIN_SAVE_DIR + ".zip";                    zipphotoFile = new File(ZipPhotoPath);                    File[] fileName = photoFile.listFiles();                    if (fileName.length > 0) {                        for (int i = 0; i < fileName.length; i++) {                            files.add(fileName[i]);                        }                    }                    try {                        if(ZipUtils.zipPhotoFiles(files, zipphotoFile)){                            ToastUtil.ShowLong(this,"文件压缩路径为:" + ZipPhotoPath);                        }else{                            ToastUtil.ShowLong(this,"文件压缩路失败...");                        }                    } catch (IOException e) {                        e.printStackTrace();                    }                }else{                    ToastUtil.ShowLong(this,"请先拍摄照片...");                }                break;        }    }}

主要的操作就是这些剩下的用了一些写好的控件，完成后在手机上运行如果不能用请确认应用的摄像头权限是否打开。

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