android獲取本地圖片或拍照圖片

 

從SD卡中獲取圖片資源，或者拍一張新的圖片。

先貼代碼

獲取圖片：

 

<EM><STRONG>    CharSequence[] items = { "相冊", "相機"};    
         new AlertDialog.Builder( this)
            .setTitle( "選擇圖片來源")
            .setItems(items, new OnClickListener() {
         public void onClick(DialogInterface dialog, int which) {
           if( which == SELECT_PICTURE ){
            Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
            intent.addCategory(Intent.CATEGORY_OPENABLE);
            intent.setType( "p_w_picpath/*");
            startActivityForResult(Intent.createChooser(intent, "選擇圖片"), SELECT_PICTURE);    
                     } else{
                        Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);    
                        startActivityForResult(intent, SELECT_CAMER);    
                     }
        }
      })
      .create().show(); </STRONG></EM>

 

註釋：拍照獲取的話，能夠指定圖片的保存地址，在此不說明。

 

 

處理圖片，方法一，直接處理返回圖片：

<EM><STRONG><STRONG> protected void onActivityResult( int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if(resultCode == RESULT_OK){
//選擇圖片
Uri uri = data.getData();
ContentResolver cr = this.getContentResolver();
try {
if(bmp != null) //若是不釋放的話，不斷取圖片，將會內存不夠
bmp.recycle();
bmp = BitmapFactory.decodeStream(cr.openInputStream(uri));
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
System.out.println( "the bmp toString: " + bmp);
p_w_picpathSV.setBmp(bmp);
} else{
Toast.makeText(SetImageActivity. this, "請從新選擇圖片", Toast.LENGTH_SHORT).show();
}

}</STRONG></STRONG></EM>

註釋：

一、網上有說明，直接處理返回的圖片是被系統壓縮過的，不過本身在測試的過程並無區別；

二、若是用戶不斷的從新獲取圖片的話，必須把如今的Bmp內存釋放，不然會報錯！ bmp.recycle()。

 

 

處理圖片，方法二，得到圖片的地址再處理：

 

protected void onActivityResult( int requestCode, int resultCode, Intent data) {
   super.onActivityResult(requestCode, resultCode, data);
   if(resultCode == RESULT_OK){
    Uri uri = data.getData();    
    String [] proj={MediaStore.Images.Media.DATA};
    Cursor cursor = managedQuery( uri,
        proj,                                 // Which columns to return
         null,             // WHERE clause; which rows to return (all rows)
         null,             // WHERE clause selection arguments (none)
         null);                                 // Order-by clause (ascending by name)
    
     int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
    cursor.moveToFirst();
    
    String path = cursor.getString(column_index);
    bmp = BitmapFactory.decodeFile(path);
    System.out.println( "the path is :" + path);
  } else{
    Toast.makeText(SetImageActivity. this, "請從新選擇圖片", Toast.LENGTH_SHORT).show();   }      }

轉自：http://blog.csdn.net/you_and_me12/article/details/7262988