Android實現拍照，以及從相冊選擇圖片裁剪功能同時保存在本地



       首先，我本人以前沒接觸過Android又是剛工作一段時間，前段時間比較忙，今天來跟大家分享下最近的收穫吧，最近項目中需要一個拍照以及修剪圖片，並保存修剪之後的圖片到相對應的位置區，我們直接進入主題哈。不對的地方多多指教，勿噴。

<?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:background="@android:color/white"
     android:orientation="vertical" >
  <LinearLayout
         android:layout_width="fill_parent"
         android:layout_height="wrap_content"
         android:gravity="center"
         >
        <ImageView
         android:id="@+id/image"
         android:layout_width="70dp"
         android:layout_height="100dp"
         android:src="@drawable/qzx"/>
 </LinearLayout>
      <Button
         android:id="@+id/toCamera"
         android:layout_width="fill_parent"
         android:layout_height="wrap_content"
         android:padding="10dp"
         android:text="拍照" />
         <Button
         android:id="@+id/toSelectPhoto"
         android:layout_width="fill_parent"
         android:layout_height="wrap_content"
         android:padding="10dp"
         android:text="相冊" />
       <Button
         android:id="@+id/uplodphoto"
         android:layout_width="fill_parent"
         android:layout_height="wrap_content"
         android:padding="10dp"
         android:text="上傳" />

</LinearLayout>

首先呢這是前臺的一個佈局，我相信大家都能看懂。我們通過按鈕拍照，就可以調用拍照的功能啦，

 protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_onphoto);//這裏呢是指向那個拍照的前臺界面 也就是上面的佈局
   takephoto=(Button)findViewById(R.id.toCamera);//這裏是調用拍照那個button

   selectphoto=(Button) findViewById(R.id.toSelectPhoto);//同理 選擇相冊
   takephoto.setOnClickListener(listener);//listener 當然了這個是個監聽啦

   selectphoto.setOnClickListener(listener);
    upload.setOnClickListener(listener);
    PortableSystemApplication gisQueryApplication = (PortableSystemApplication) this.getApplication();
    gisQueryApplication.addActivity(this);
    this.mHandler = new MyHandler(Looper.myLooper());
    imageView=(ImageView)findViewById(R.id.image);
   }
   private OnClickListener listener=new OnClickListener(){
    @Override
    public void onClick(View v) {
     switch (v.getId()) {
     case R.id.toCamera:
      OnPhotoActivity.this.onPhoto();
      break;
     case R.id.toSelectPhoto:
      pickPhoto();
      break;
     case R.id.uplodphoto:
      if(!uploadphoto.equals(""))
      {
       upload.setEnabled(false);
       onPreExecute();
       UploadThread uploadThread = new UploadThread();
       new Thread(uploadThread).start();
      }else{
       Toast.makeText(OnPhotoActivity.this, "請選擇圖片", Toast.LENGTH_SHORT).show(); 
       return;
      }
      break;
     }
    }
   };

下面使我們具體調用拍照功能的代碼了；

protected void onPhoto() {
    if (Environment.getExternalStorageState().equals("mounted")) {    //判斷sd卡是否存在
    String str1 =((PortableSystemApplication) this.getApplication()).getProjectPath()+ "CameraPhoto/";
     String str2 = UtilsTools.GetCurrentTime() + ".jpg";
     File localFile = new File(str1);
     if (!(localFile.exists()))
      localFile.mkdirs();
     m_CurrentCamaraPath  = str1 + str2;
     m_CurrentCamaraPhotoName = str2;
     Log.i("拍照1", "路徑=" + m_CurrentCamaraPath);
     Log.i("拍照1", "名字=" + m_CurrentCamaraPhotoName);
     Uri localUri = Uri.fromFile(new File(str1, str2));
     Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
     intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(new File(
       str1, str2)));
     startActivityForResult(intent, PHOTO_GRAPH);
     Log.i("OnPhotoActivity.this.m_CurrentCamaraPath", "=========="+m_CurrentCamaraPath);
    } else {
     Toast.makeText(this, "無SD卡", 1).show();
    } 
   }

這部分代碼的實現從相冊選擇；

 protected void pickPhoto() {
    Intent intent = new Intent();
    intent.setType("image/*");
    intent.setAction(Intent.ACTION_GET_CONTENT); 
    startActivityForResult(intent, PHOTO_ZOOM);
   }

這部分是實現裁剪的；

public void startPhotoZoom(Uri uri) {
            Intent intent = new Intent("com.android.camera.action.CROP");
            intent.setDataAndType(uri, IMAGE_UNSPECIFIED);
            intent.putExtra("crop", "true");
            // aspectX aspectY 是寬高的比例
           intent.putExtra("aspectX", 1);
            intent.putExtra("aspectY", 1);
            // outputX outputY 是裁剪圖片寬高
           intent.putExtra("outputX", 300);
            intent.putExtra("outputY", 500);
            intent.putExtra("return-data", true);
            OnPhotoActivity.this.startActivityForResult(intent, PHOTO_RESOULT);
        } 

下面是調用拍照返回來的一些參數

@Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
     if (resultCode == NONE)
      return;
     if (requestCode == PHOTO_GRAPH) {
                // 設置文件保存路徑
     if(!m_CurrentCamaraPath.equals("")){
       File picture = new File(m_CurrentCamaraPath);
       startPhotoZoom(Uri.fromFile(picture));
      }else{
       Toast.makeText(this, "m_CurrentCamaraPath 爲“”", 1).show();
      }
     }
     if(data == null)
     {
      return;
     }
     if(requestCode == PHOTO_ZOOM )  //從相冊取圖片，有些手機有異常情況，請注意
    {
      startPhotoZoom(data.getData());
     }
            // 處理結果
    if (requestCode == PHOTO_RESOULT) {
      if (data != null) {
       Bitmap bitmap = data.getParcelableExtra("data");
       imageView.setImageBitmap(bitmap); //把圖片顯示在ImageView控件上
      SavePicInLocal( bitmap);
      }
      try {
        // 將臨時文件刪除
      picture.delete();
      } catch (Exception e) {
       e.printStackTrace();
      }
     }
     super.onActivityResult(requestCode, resultCode, data);
    }

這個是將裁剪返回的數據保存

 private void SavePicInLocal(Bitmap bitmap) {
      FileOutputStream fos = null;
      BufferedOutputStream bos = null;
      ByteArrayOutputStream baos = null; // 字節數組輸出流
     try {
       baos = new ByteArrayOutputStream();
       bitmap.compress(Bitmap.CompressFormat.PNG, 100, baos);
       byte[] byteArray = baos.toByteArray();// 字節數組輸出流轉換成字節數組
       String patch =((PortableSystemApplication) this.getApplication()).getProjectPath()+ "CameraPhoto/";
       String picName = UtilsTools.GetCurrentTime() + ".jpg";
      // String picName =m_CurrentCamaraPhotoName;
       uploadphoto=patch+picName;
       File file = new File(patch, picName);
       // 將字節數組寫入到剛創建的圖片文件中
      fos = new FileOutputStream(file);
       bos = new BufferedOutputStream(fos);
       bos.write(byteArray);
      } catch (Exception e) {
       e.printStackTrace();
      } finally {
       if (baos != null) {
        try {
         baos.close();
        } catch (Exception e) {
         e.printStackTrace();
        }
       }
       if (bos != null) {
        try {
         bos.close();
        } catch (Exception e) {
         e.printStackTrace();
        }
       }
       if (fos != null) {
        try {
         fos.close();
        } catch (Exception e) {
         e.printStackTrace();
        }
       }
      }
    }