Android設(shè)置拍照或者上傳本地圖片的示例

2019-12-12 04:49:28

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供稿：網(wǎng)友

前幾天，我們客戶端這邊收到了市場部的一個(gè)需求，需要在我們訂單成交后，我們的客戶端有一個(gè)上傳交易憑證的功能，那么如何在Android實(shí)現(xiàn)上傳圖片的這個(gè)功能呢？在我進(jìn)行編碼之前，我先問自己幾個(gè)問題。

第一，圖片是直接選擇圖庫里的，還是需要拍照和選擇圖片兩個(gè)選項(xiàng)？

因?yàn)樵谶x擇圖片的時(shí)候，會有一個(gè)拍照的按鈕，也可以實(shí)現(xiàn)拍照的功能。

第二，需不需要本地緩存？

本地緩存值得是，在我們的圖片上傳后，是否在下次直接顯示，而不是從服務(wù)器讀取。

第三，圖片是否需要壓縮？

眾所周知，圖片這種資源，因?yàn)轶w積較大，在網(wǎng)絡(luò)上傳輸還是很慢的，所以，我們需要在我們的傳輸時(shí)，適當(dāng)?shù)膶ξ募拇笮∵M(jìn)行壓縮，那么就要根據(jù)我們自身的需求，按照一定的比例來進(jìn)行壓縮。

在思考完這幾個(gè)問題后，根據(jù)我們自己的需求，我們在上傳時(shí)有兩個(gè)選項(xiàng)的，一個(gè)是拍照，一個(gè)是選擇圖片，另外我們需要做本地緩存，還有，圖片上傳不需要壓縮。

那么我們就可以開始實(shí)現(xiàn)了，首先在我們的主fragment里，添加如下代碼，如果你是activity，當(dāng)然也可以。

做一個(gè)ImageView,作為我們上傳的圖像。

 mPic1 = (ImageView) view.findViewById(R.id.ImageView01); nbsp;  mPic1.setOnClickListener(mPhotoListener);    private View.OnClickListener mPhotoListener = new View.OnClickListener() {      @Override   public void onClick(View v) {     int id = v.getId();     if (id == R.id.ImageView01) {       Intent popupIntent = new Intent(getActivity(), PopupActivity.class);       mPhotoId = id;       startActivityForResult(popupIntent, 1);     }   } };

然后，我們跳轉(zhuǎn)到另外一個(gè)PopupActivity，讓我們選擇,
PopupActivity.Java

package com.chuanlaoda.android.activity;  import java.io.DataOutputStream; import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.net.HttpURLConnection; import java.net.URL; import java.text.SimpleDateFormat; import java.util.Calendar; import java.util.Date;  import android.app.Activity; import android.app.AlertDialog; import android.content.ActivityNotFoundException; import android.content.DialogInterface; import android.content.Intent; import android.graphics.Bitmap; import android.graphics.Bitmap.CompressFormat; import android.net.Uri; import android.os.Bundle; import android.os.Environment; import android.provider.MediaStore; import android.util.Log; import android.view.MotionEvent; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.ImageView; import android.widget.LinearLayout; import android.widget.Toast;  import com.chuanloada.android.R;  public class PopupActivity extends Activity implements OnClickListener {   private Button btn_take_photo, btn_pick_photo, btn_cancel;   private LinearLayout layout;   private Intent intent;    private Button showList;   private Button uploadNow;   private String mCurrentPhotoPath;   private Bitmap sourcePic;   private File dir = null;    private String picName = null;   private String uploadFile = null;    static Uri capturedImageUri=null;   private Bitmap bitmap = null;      @Override   protected void onCreate(Bundle savedInstanceState) {     super.onCreate(savedInstanceState);     setContentView(R.layout.popup);     intent = getIntent();     btn_take_photo = (Button) this.findViewById(R.id.btn_take_photo);     btn_pick_photo = (Button) this.findViewById(R.id.btn_pick_photo);     btn_cancel = (Button) this.findViewById(R.id.btn_cancel);      layout = (LinearLayout) findViewById(R.id.pop_layout);      layout.setOnClickListener(new OnClickListener() {        public void onClick(View v) {         // TODO Auto-generated method stub         Toast.makeText(getApplicationContext(), "提示：點(diǎn)擊空白地方可以關(guān)閉",             Toast.LENGTH_SHORT).show();       }     });      btn_cancel.setOnClickListener(this);     btn_pick_photo.setOnClickListener(this);     btn_take_photo.setOnClickListener(this);   }    @Override   public boolean onTouchEvent(MotionEvent event) {     finish();     return true;   }    @Override   protected void onActivityResult(int requestCode, int resultCode, Intent data) {          if (resultCode != RESULT_OK) {       return;     }     if (data != null) {       if (data.getExtras() != null)       {         bitmap = (Bitmap) data.getExtras().get("data");         intent.putExtras(data.getExtras());         intent.putExtra("uri", capturedImageUri);         intent.putExtra("requestCode", requestCode);         intent.putExtra("image", bitmap);       }              if (data.getData() != null)         intent.setData(data.getData());           }     setResult(requestCode, intent);     finish();   }    @Override   public void onClick(View v) {     switch (v.getId()) {     case R.id.btn_take_photo:       dispatchTakePictureIntent();       break;     case R.id.btn_pick_photo:       try {          Intent intent = new Intent();         intent.setType("image/*");         intent.setAction(Intent.ACTION_GET_CONTENT);         startActivityForResult(intent, 2);       } catch (ActivityNotFoundException e) {        }       break;     case R.id.btn_cancel:       finish();       break;     default:       break;     }   }      private File createImageFile() throws IOException {     // Create an image file name     String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());     String imageFileName = "JPEG_" + timeStamp + "_";     File storageDir = Environment.getExternalStoragePublicDirectory(         Environment.DIRECTORY_PICTURES);     File image = File.createTempFile(       imageFileName, /* prefix */       ".jpg",     /* suffix */       storageDir   /* directory */     );      // Save a file: path for use with ACTION_VIEW intents     mCurrentPhotoPath = "file:" + image.getAbsolutePath();     return image;   }      private void dispatchTakePictureIntent() {     Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);     // Ensure that there's a camera activity to handle the intent     if (takePictureIntent.resolveActivity(getPackageManager()) != null) {       // Create the File where the photo should go       File photoFile = null;       try {         photoFile = createImageFile();       } catch (IOException ex) {         // Error occurred while creating the File       }       // Continue only if the File was successfully created       capturedImageUri = Uri.fromFile(photoFile);       if (photoFile != null) {         //takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, capturedImageUri);         startActivityForResult(takePictureIntent, 1);       }     }   } }

Popup.xml

<?xml version="1.0" encoding="utf-8"?> <RelativeLayout    xmlns:android="http://schemas.android.com/apk/res/android"   android:layout_width="fill_parent"   android:layout_height="wrap_content"   android:gravity="center_horizontal"   android:orientation="vertical"  >  <LinearLayout    android:id="@+id/pop_layout"   android:layout_width="fill_parent"   android:layout_height="wrap_content"   android:gravity="center_horizontal"   android:orientation="vertical"   android:layout_alignParentBottom="true"    android:background="@drawable/btn_style_alert_dialog_background"    >       <Button     android:id="@+id/btn_take_photo"     android:layout_marginLeft="20dip"     android:layout_marginRight="20dip"     android:layout_marginTop="20dip"     android:layout_width="fill_parent"     android:layout_height="wrap_content"     android:text="拍照"     android:background="@drawable/btn_style_alert_dialog_button"     android:textStyle="bold"      />    <Button     android:id="@+id/btn_pick_photo"     android:layout_marginLeft="20dip"     android:layout_marginRight="20dip"     android:layout_marginTop="5dip"       android:layout_width="fill_parent"     android:layout_height="wrap_content"     android:text="從相冊選擇"      android:background="@drawable/btn_style_alert_dialog_button"      android:textStyle="bold"      />    <Button     android:id="@+id/btn_cancel"     android:layout_marginLeft="20dip"     android:layout_marginRight="20dip"     android:layout_marginTop="15dip"      android:layout_marginBottom="15dip"     android:layout_width="fill_parent"     android:layout_height="wrap_content"     android:text="取消"     android:background="@drawable/btn_style_alert_dialog_cancel"     android:textColor="#ffffff"     android:textStyle="bold"          /> </LinearLayout> </RelativeLayout>

接下來就是我們需要在我們的主fragment （或者activity）中添加onActivityResult.

public void onActivityResult(int requestCode, int resultCode, Intent data) {     photo = (ImageView) mView.findViewById(mPhotoId);     String pfid=String.valueOf(BusinessDetailsFragment.getPosition(mPhotoId) + 1);     String gsid=String.valueOf(mBusinessId);     String cur_date = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss").format(new Date());     switch (resultCode) {     case 1:       if (data != null) {         Uri mImageCaptureUri = (Uri) data.getExtras().get("uri");         if (mImageCaptureUri != null) {           Bitmap image;           try {             //image = MediaStore.Images.Media.getBitmap(this.getActivity().getContentResolver(), mImageCaptureUri);             image = (Bitmap) data.getExtras().get("image");             String fileFullPath = PhotoAPI.savePicsToSdcard(image, mFileLoc);             PromptUtils.showProgressDialog(getActivity(), "正在上傳照片");             mResult = PhotoAPI.uploadFile(gsid, pfid, fileFullPath);             Cache.addLastPhotoPath(pfid, fileFullPath);             Cache.addLastPhotoDate(gsid, cur_date);             PromptUtils.dismissProgressDialog();                          showDialog(mResult);             if (image != null) {               photo.setImageBitmap(image);             }           } catch (Exception e) {             e.printStackTrace();           }         } else {           Bundle extras = data.getExtras();           if (extras != null) {             Bitmap image = extras.getParcelable("data");             String fileFullPath = PhotoAPI.savePicsToSdcard(image, mFileLoc);                          PromptUtils.showProgressDialog(getActivity(), "正在上傳照片");             mResult = PhotoAPI.uploadFile(gsid, pfid, fileFullPath);             PromptUtils.dismissProgressDialog();             Cache.addLastPhotoPath(pfid, fileFullPath);             Cache.addLastPhotoDate(gsid, cur_date);             showDialog(mResult);             if (image != null) {               photo.setImageBitmap(image);             }           }         }       }       break;     case 2:       if (data != null) {         Uri mImageCaptureUri = data.getData();         if (mImageCaptureUri != null) {           Bitmap image;           try {             image = MediaStore.Images.Media.getBitmap(this.getActivity().getContentResolver(), mImageCaptureUri);                       String fileFullPath = getRealPathFromURI(this.getActivity(),mImageCaptureUri);             PromptUtils.showProgressDialog(getActivity(), "正在上傳照片");             mResult = PhotoAPI.uploadFile(gsid, pfid, fileFullPath);             PromptUtils.dismissProgressDialog();             Cache.addLastPhotoPath(pfid, fileFullPath);             Cache.addLastPhotoDate(gsid, cur_date);             showDialog(mResult);             if (image != null) {               photo.setImageBitmap(image);             }           } catch (Exception e) {             e.printStackTrace();           }         } else {           Bundle extras = data.getExtras();           if (extras != null) {             String fileFullPath = getRealPathFromURI(this.getActivity(),mImageCaptureUri);             PromptUtils.showProgressDialog(getActivity(), "正在上傳照片");             mResult = PhotoAPI.uploadFile(gsid, pfid, fileFullPath);             PromptUtils.dismissProgressDialog();             Cache.addLastPhotoPath(pfid, fileFullPath);             Cache.addLastPhotoDate(gsid, cur_date);             Bitmap image = extras.getParcelable("data");             if (image != null) {               photo.setImageBitmap(image);             }           }         }       }       break;     default:       break;      }   }

另外，我們處理圖片上傳的代碼在這里。

class UploadThread extends Thread {   private String result = "";   private String actionUrl;   private String uploadFile;      public UploadThread(String gsid, String pfid, String uploadFile) {     String baseUrl = APIConfig.getAPIHost() + "uploadProof";     this.actionUrl=baseUrl+"&gsid=" + gsid + "&pfid="+pfid;      this.uploadFile = uploadFile;   }      @Override   public void run() {     String end = "/r/n";     String twoHyphens = "--";     String boundary = "*****";     try {        URL url = new URL(actionUrl);       HttpURLConnection con = (HttpURLConnection) url.openConnection();       /* 允許Input、Output，不使用Cache */       con.setDoInput(true);       con.setDoOutput(true);       con.setUseCaches(false);       /* 設(shè)置傳送的method=POST */       con.setRequestMethod("POST");       /* setRequestProperty */       con.setRequestProperty("Connection", "Keep-Alive");       con.setRequestProperty("Charset", "UTF-8");       con.setRequestProperty("Content-Type",           "multipart/form-data;boundary=" + boundary);        /* 設(shè)置DataOutputStream */       DataOutputStream ds = new DataOutputStream(con.getOutputStream());       ds.writeBytes(twoHyphens + boundary + end);       ds.writeBytes("Content-Disposition: form-data; "           + "name=/"GooddShip/";filename=/"" + uploadFile + "/"" + end);       ds.writeBytes(end);        /* 取得文件的FileInputStream */       FileInputStream fStream = new FileInputStream(uploadFile);        /* 設(shè)置每次寫入1024bytes */       int bufferSize = 1024;       byte[] buffer = new byte[bufferSize];        int length = -1;       /* 從文件讀取數(shù)據(jù)至緩沖區(qū) */       while ((length = fStream.read(buffer)) != -1) {         /* 將資料寫入DataOutputStream中 */         ds.write(buffer, 0, length);       }        ds.writeBytes(end);       ds.writeBytes(twoHyphens + boundary + twoHyphens + end);        /* close streams */       fStream.close();       ds.flush();        /* 取得Response內(nèi)容 */       InputStream is = con.getInputStream();       int ch;       StringBuffer b = new StringBuffer();       while ((ch = is.read()) != -1) {         b.append((char) ch);       }              /* Parse JSON */       JSONObject jObject = new JSONObject(b.toString());       int code = jObject.getInt("Code");       String error = jObject.getString("Error");       String msg = jObject.getString("msg");              if (code == 1) {       /* 將Response顯示于Dialog */         result = "上傳成功";       } else result = "上傳失敗" + error;       /* 關(guān)閉DataOutputStream */       ds.close();     } catch (Exception e) {       result = "上傳失敗" + e;     }   }

然后就可以了，我們最終的效果如下。