android一个上传图片的样例,包含怎样终止上传过程，假设在上传的时候更新进度条(一)

2022-12-10 07:37:45

先上效果图:

Layout为:

<?

xml version="1.0" encoding="utf-8"?>

<LinearLayout

  xmlns:android="http://schemas.android.com/apk/res/android"

  android:layout_width="fill_parent"

  android:layout_height="fill_parent"

  android:background="@drawable/black"

  android:orientation="vertical">

  <RelativeLayout

  	  xmlns:android="http://schemas.android.com/apk/res/android"

      android:layout_width="fill_parent"

      android:layout_height="fill_parent"

      android:layout_weight="1"

      android:isScrollContainer="true">

  	  <ImageView

  		android:layout_width="fill_parent"

  		android:layout_height="fill_parent"

  		android:scaleType="centerInside"

  		android:id="@+id/photo_upload_preview_image"

  		android:layout_centerInParent="true">

  	  </ImageView>

  	  <!-- photo_upload_progress_item的位置跟photo_upload_preview_image是一样的，为了显示photo_upload_preview_image还在loading

  	   -->

  	  <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    	android:layout_width="wrap_content"

		android:layout_height="wrap_content"

		android:paddingTop="10dp"

		android:paddingBottom="10dp"

		android:orientation="horizontal"

		android:id="@+id/photo_upload_progress_item"

		android:layout_centerInParent="true"

		android:visibility="gone">

		<ProgressBar

	  	  android:layout_width="wrap_content"

	  	  android:layout_height="wrap_content"

      	  android:layout_marginRight="4dp"

      	  android:layout_gravity="center_vertical"

      	  android:visibility="visible"

      	  style="?android:attr/progressBarStyleSmall"

      	  android:indeterminateDrawable="@drawable/progress_bar_drawable">

		</ProgressBar>

    	<TextView

      	  android:layout_width="wrap_content"

      	  android:layout_height="wrap_content"

      	  android:layout_gravity="center_vertical"

      	  android:gravity="center"

      	  android:textColor="@drawable/white"

      	  android:text="正在加载照片...">

    	</TextView>

  	  </LinearLayout>

  </RelativeLayout>

  <!-- photo_upload_progress_layout在photo_upload_preview_image的正底下。带有进度条，显示photo_upload_preview_image的上传进度

   -->

  <LinearLayout

    xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="fill_parent"

  	android:layout_height="wrap_content"

  	android:id="@+id/photo_upload_progress_layout"

  	android:orientation="vertical"

  	android:background="@drawable/black"

  	android:visibility="gone">

  	<LinearLayout

      xmlns:android="http://schemas.android.com/apk/res/android"

  	  android:layout_width="fill_parent"

      android:layout_height="10dp"

      android:background="@drawable/upload_photo_progress_bg"

      android:layout_marginTop="6dp"

      android:layout_marginBottom="6dp"

      android:layout_marginLeft="6dp"

      android:layout_marginRight="6dp"

      android:layout_gravity="center_horizontal"

      android:paddingLeft="0dp"

      android:paddingRight="0dp"

      android:id="@+id/photo_upload_progress_bar_container">

      <View

        android:layout_width="3dp"

        android:layout_height="fill_parent"

        android:id="@+id/photo_upload_progress_bar"

        android:background="@drawable/upload_photo_progress_bar">

      </View>

	</LinearLayout>

	<TextView

	  android:layout_width="wrap_content"

      android:layout_height="wrap_content"

      android:layout_marginBottom="6dp"

      android:layout_gravity="center_horizontal"

      android:text="照片上传中..."

      android:textColor="@drawable/white">

	</TextView>

  </LinearLayout>

  <LinearLayout

    xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="fill_parent"

  	android:layout_height="wrap_content"

  	android:id="@+id/photo_upload_bottom_bar"

  	android:orientation="vertical"

  	android:background="#BFBFBF"

  	android:paddingLeft="10dp"

  	android:paddingRight="10dp"

  	android:paddingBottom="4dp"

  	android:paddingTop="2dp">

  	<RelativeLayout

     xmlns:android="http://schemas.android.com/apk/res/android"

    	android:layout_width="fill_parent"

  		android:layout_height="wrap_content"

  		android:id="@+id/photo_upload_album_layout"

  		android:paddingTop="5dp"

  		android:background="#BFBFBF">

  		<TextView

  			xmlns:android="http://schemas.android.com/apk/res/android"

    		android:layout_width="wrap_content"

  			android:layout_height="wrap_content"

  			android:layout_marginLeft="5dp"

  			android:text="上传至"

  			android:textSize="16dp"

  			android:singleLine="true"

  			android:textColor="@drawable/gray2"

  			android:gravity="center_vertical"

  			android:id="@+id/photo_upload_ablum_prompt">

  		</TextView>

  		<TextView

  			xmlns:android="http://schemas.android.com/apk/res/android"

    		android:layout_width="wrap_content"

  			android:layout_height="wrap_content"

  			android:layout_toRightOf="@id/photo_upload_ablum_prompt"

  			android:layout_marginLeft="5dp"

  			android:text="手机相冊"

  			android:textSize="16dp"

  			android:singleLine="true"

  			android:gravity="center_vertical"

  			android:textColor="@drawable/black"

  			android:id="@+id/photo_upload_ablum_name">

  		</TextView>

  		<!-- 在右側，能够选择专辑

  		 -->

  		<Button

  			android:id="@+id/photo_upload_choose_album"

	        android:layout_width="wrap_content"

	        android:layout_height="40dp"

	        android:layout_alignParentRight="true"

	        android:text="专辑"

	        android:textColor="@drawable/black"

	        android:paddingRight="30dp"

	        android:background="@drawable/location_button">

  		</Button>

  	</RelativeLayout>

  	<!-- 这个在photo_upload_album_layout的以下为位置添加模块

  	 -->

  	<RelativeLayout

     xmlns:android="http://schemas.android.com/apk/res/android"

     android:id="@+id/photo_upload_location_layout"

     android:layout_below="@id/photo_upload_album_layout"

     android:layout_width="fill_parent"

     android:layout_height="wrap_content">

     <RelativeLayout

	     xmlns:android="http://schemas.android.com/apk/res/android"

	     android:id="@+id/photo_upload_location_right_layout"

	     android:layout_width="wrap_content"

	     android:layout_height="wrap_content"

	     android:layout_alignParentRight="true"

	     android:background="#BFBFBF"

	     android:paddingTop="5dp"

	     android:paddingBottom="5dp">

	     <Button

	        android:id="@+id/photo_upload_add_gps"

	        android:layout_width="wrap_content"

	        android:layout_height="40dp"

	        android:text="位置"

	        android:textColor="@drawable/black"

	        android:paddingRight="30dp"

	        android:background="@drawable/location_button">

	     </Button>

	  </RelativeLayout>

  	<RelativeLayout

     xmlns:android="http://schemas.android.com/apk/res/android"

     android:id="@+id/photo_upload_location_left_layout"

     android:layout_width="wrap_content"

     android:layout_height="wrap_content"

     android:layout_marginRight="5dp"

     android:layout_alignParentLeft="true"

     android:layout_toLeftOf="@id/photo_upload_location_right_layout">

     <ImageView

     	android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_marginLeft="5dp"

        android:layout_marginRight="10dp"

        android:id="@+id/photo_upload_location_icon"

        android:src="@drawable/location"

        >

     </ImageView>

     <Button

        android:id="@+id/photo_upload_remove_location"

        android:layout_width="wrap_content"

        android:layout_height="40dp"

        android:text="移除"

        android:textColor="@drawable/black"

        android:background="@drawable/common_button_style"

        android:layout_alignParentRight="true"

        android:layout_marginLeft="5dp"

        android:layout_marginTop="5dp"

        >

     </Button>

     <TextView

     	android:id="@+id/photo_upload_location_des"

     	android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:textColor="@drawable/black"

        android:layout_marginTop="10dp"

        android:layout_toLeftOf="@id/photo_upload_remove_location"

        android:layout_toRightOf="@id/photo_upload_location_icon">

     </TextView>

     </RelativeLayout>

	</RelativeLayout>

	<!-- 这个editText用户能够输入一些信息，在位置模块的正下方

	 -->

  	<EditText

   	  android:layout_width="fill_parent"

      android:layout_height="wrap_content"

      android:id="@+id/photo_upload_title"

      android:singleLine="true"

      android:maxLength="63"

      android:maxLines="3"

      android:hint="请输入:"

      android:inputType="textMultiLine">

   	</EditText>

  	 <!-- 这两个button在editText的正下方

	 -->

  	<LinearLayout

  	  xmlns:android="http://schemas.android.com/apk/res/android"

  	  android:layout_width="fill_parent"

  	  android:layout_height="wrap_content">

  	  <Button

  	  	android:layout_width="wrap_content"

  	  	android:layout_height="wrap_content"

  	  	android:layout_marginRight="15dp"

  	  	android:background="@drawable/common_button_style"

  	  	android:text="上传"

  	  	android:id="@+id/photo_upload_button_upload"

  	  	android:textColor="@drawable/black"

  	  	android:layout_weight="1"

  	  	android:textSize="18dp">

  	  </Button>

  	  <Button

  	  	android:layout_width="wrap_content"

  	  	android:layout_height="wrap_content"

  	  	android:background="@drawable/common_button_style"

  	  	android:text="取消"

  	  	android:id="@+id/photo_upload_button_cancel"

  	  	android:textColor="@drawable/black"

  	  	android:layout_weight="1"

  	  	android:textSize="18dp">

  	  </Button>

  	</LinearLayout>

  </LinearLayout>

</LinearLayout>

这里我们是把本地SD根文件夹下的一张图片，转成Bitmap,再存到要上传的tmp文件夹里面:

private class LoadPhotoTask extends AsyncTask<Void, Void, Boolean>{

		private Bitmap mLoadedBitmap = null;

    	protected Boolean doInBackground(Void... params) {

    		try {

				if(mFilePathName.length() > 0){

					File file = new File(mFilePathName);

					if (!file.exists()) {

						return false;

					}

					BitmapFactory.Options opt = new BitmapFactory.Options();

					long fileSize = file.length();

					int maxSize = 2*1024 * 1024;

					if(fileSize <= maxSize){

						opt.inSampleSize = 1;

					}else if(fileSize <= maxSize * 4){ <strong>//小于8M</strong>

						opt.inSampleSize = 2;

					}else{

						long times = fileSize / maxSize;

						opt.inSampleSize = (int)(Math.log(times) / Math.log(2.0)) + 1; <strong>//Math.log返回以e为底的对数</strong>

					}

					try{

						mLoadedBitmap = BitmapFactory.decodeFile(mFilePathName,opt);<strong>//opt为缩小的倍数</strong>

						mUploadFilePathName = SaveBitmapToFile(mLoadedBitmap);

					}catch(OutOfMemoryError e){

						Toast.makeText(UploadPhotoActivity.this,

								   getResources().getString(R.string.no_memory_to_view_photo),

								   Toast.LENGTH_SHORT).show();

						UploadPhotoActivity.this.finish();

					}

				}

				return true;

			} catch (Exception e) {

				Log.e("UploadPhotoActivity", "doInBackground", e);

				return false;

			}

    	}  

    	protected void onPostExecute(Boolean result){

    		try {

				showLoadPreviewProgressBar(false);

				if(mLoadedBitmap != null){

					ImageView IamgePreView = (ImageView)findViewById(R.id.photo_upload_preview_image);

					IamgePreView.setImageBitmap(mLoadedBitmap);

				}else{

				}

				mLoadedBitmap = null;

			} catch (Exception e) {

				Log.e("UploadPhotoActivity", "onPostExecute", e);

			}

    	}

    }

private String SaveBitmapToFile(Bitmap bmp){

		if (null == bmp) {

			return null;

		}

		String fileName = "upload_tmp.jpg";

		<strong>File f = this.getFileStreamPath(fileName);</strong>//data/data/com.example.tianqitongtest/files/upload_tmp.jpg,这个是要上传的文件存的位置

		if (f.exists()) {

			f.delete();

		}

		FileOutputStream ostream;

		try {

			<strong>int targetWidth = 780;

			int w = bmp.getWidth();

			if (w > targetWidth) {

				int h = bmp.getHeight();

				int targetHeight = (targetWidth * h) / w;

				bmp = Bitmap.createScaledBitmap(bmp, targetWidth, targetHeight,

						true);//依据指定宽度和高度来生成一个新的Bitmap

			}</strong>

			ostream = this.openFileOutput(fileName, MODE_PRIVATE);

			bmp.compress(Bitmap.CompressFormat.JPEG, 70, ostream);

			ostream.flush();

			ostream.close();

			ostream = null;

		} catch (Exception e) {

			// TODO Auto-generated catch block

			e.printStackTrace();

		}

		return f.getAbsolutePath();

	}

上传的时候须要把键盘收起:

private void hideInputMethod(){

		View view = getCurrentFocus();

		if(view != null){

		    ((InputMethodManager)getSystemService(INPUT_METHOD_SERVICE)).hideSoftInputFromWindow(view.getWindowToken(), InputMethodManager.HIDE_NOT_ALWAYS);

		}

	}

得到SD卡上的11.jpg的图片路径：

private String getStoredPicPath() {

		String fileName = "11.jpg";

		return Environment.getExternalStorageDirectory()+"/"+fileName;

	}

码农公寓

相关文章