如何安装图像从绘制到Gmail吗？ [英] How to attach image from drawable to gmail?

问题描述

我想从我的GridView控件到Gmail或Facebook的重视形象，但每当我试图连接我的应用程序得到了碰撞，而我得到在与空指针异常错误，下面是我的code与GridView的图像选择，任何一个可以帮助？

 公共类Free_Cover_Activity扩展AppCompatActivity
{
 GridView的网格;
 INT [] imageId = {
  R.drawable.discovercover，
  R.drawable.bur presswordfree，
  R.drawable.flyfree，
  R.drawable.cantmovefree，
  R.drawable.cantmovewordfree，
  R.drawable.chalkthisfree，
  R.drawable.fivehundredmetersfree，
  R.drawable.freeexercise，
  R.drawable.gym_smilie，
  R.drawable.hundredcalrairesfree，
  R.drawable.injuryfree，
  R.drawable.jumpropefree，
  R.drawable.nicesnathcfree，
  R.drawable.personglrecordfree，
  R.drawable.posefree，
  R.drawable.pushupfree，
  R.drawable.shoulder，
  R.drawable.timewordfree，
  R.drawable.unbrokernfree，
  R.drawable.weightbeltfree
 };

 私人位图mBitmap;
 私人意图电子邮件;

 @覆盖
 保护无效的onCreate（包savedInstanceState）
 {
  super.onCreate（savedInstanceState）;

  的setContentView（R.layout.free_cover_gridview）;
  android.support.v7.app.ActionBar ABAR = getSupportActionBar（）;
  ColorDrawable colorDrawable =新ColorDrawable（Color.parseColor（＃D64365））;
  abar.setBackgroundDrawable（colorDrawable）;
  abar.hide（）;

  CustomGridFreeCover适配器=
               新CustomGridFreeCover（Free_Cover_Activity.this，imageId）;
  格=（GridView控件）findViewById（R.id.freecover_grid）;
  grid.setAdapter（适配器）;
  grid.setOnItemClickListener（新AdapterView.OnItemClickListener（）
  {
   @覆盖
   公共无效onItemClick（适配器视图＆LT;＆GT;母公司视图中查看，INT位置，长ID）
   {
    尝试
    {
     位图largeIcon =
         BitmapFactory.de codeResource（getResources（），R.drawable.discovercover）;

     / *
     与图像资源替代R.drawable.bubble_green
     你想从绘制分享
     * /
     ByteArrayOutputStream字节=新ByteArrayOutputStream（）;
     largeIcon.com preSS（Bitmap.Com pressFormat.JPEG，40个字节）;

     //你可以创建一个新的文件名test.jpg放在SD卡中的文件夹。
     文件f =
        新的文件（Environment.getExternalStorageDirectory（）+文件分割符+test.jpg放在）;
     f.createNewFile（）;

     //写在文件中的字节
     FileOutputStream中FO =新的FileOutputStream（F）;
     fo.write（bytes.toByteArray（））;

     //记得接近德FileOutput
     fo.close（）;
    }赶上（IOException异常E）{
     // TODO自动生成的catch块
     e.printStackTrace（）;
    }

    意图shareIntent =新的意图（android.content.Intent.ACTION_SEND）;
    shareIntent.setType（为image / jpeg）;
    //设置你的主题
    shareIntent.putExtra（android.content.Intent.EXTRA_SUBJECT，你好）;
    //设置你的消息
    shareIntent.putExtra（android.content.Intent.EXTRA_TEXT，你好吗）;

    字符串的ImagePath = Environment.getExternalStorageDirectory（）
           +文件分割符+test.jpg放在;
    文件imageFileToShare =新的文件（的ImagePath）;
    开放的我们的uri = Uri.fromFile（imageFileToShare）;
    shareIntent.putExtra（Intent.EXTRA_STREAM，URI）;
    startActivity（Intent.createChooser（shareIntent，共享图片））;
   }
  }）;
 }

 公共类CustomGridFreeCover扩展了BaseAdapter
 {
  私人语境mContext;
  //私人最终的String []网络;
  私人最终诠释[] Imageid;

  公共CustomGridFreeCover（上下文C中，int [] Imageid）
  {
   mContext = C;
   this.Imageid = Imageid;
   //this.web =网络;
  }

  @覆盖
  公众诠释getCount将（）
  {
   // TODO自动生成方法存根
   返回Imageid.length;
  }

  @覆盖
  公共对象的getItem（INT位置）{
   // TODO自动生成方法存根
   返回null;
  }

  @覆盖
  众长getItemId（INT位置）{
   // TODO自动生成方法存根
   返回0;
  }

  @覆盖
  公共查看getView（INT位置，查看convertView，父母的ViewGroup）
  {
   // TODO自动生成方法存根
   查看网格;
   LayoutInflater充气=（LayoutInflater）mContext
    .getSystemService（Context.LAYOUT_INFLATER_SERVICE）;

    如果（convertView == NULL）
    {
     格=新景（mContext）;
     格= inflater.inflate（R.layout.free_cover_griditem，NULL）;
     // TextView中的TextView =（TextView中）grid.findViewById（R.id.grid_text）;
     ImageView的ImageView的=（ImageView的）grid.findViewById（R.id.grid_image_freecover）;
     //textView.setText(web[position]）;
     imageView.setImageResource（Imageid [位置]）;
    } 其他 {
     格=（查看）convertView;
    }
   回电网;
  }
 }
}
 

解决方案

下面是你需要的工作code：

首先从绘制对象保存图像 SD卡这里是code：

 尝试{

位图largeIcon = BitmapFactory.de codeResource（getResources（），R.drawable.bubble_green）;

            //你想从绘制共享图像资源替代R.drawable.bubble_green

            ByteArrayOutputStream字节=新ByteArrayOutputStream（）;
            largeIcon.com preSS（Bitmap.Com pressFormat.JPEG，40个字节）;

            //你可以创建一个新的文件名test.jpg放在SD卡中的文件夹。
            文件F =新的文件（Environment.getExternalStorageDirectory（）+文件分割符+test.jpg放在）;

            f.createNewFile（）;

            //写在文件中的字节
            FileOutputStream中FO =新的FileOutputStream（F）;
            fo.write（bytes.toByteArray（））;

            //记得接近德FileOutput
            fo.close（）;
        }
        赶上（IOException异常E）{
            // TODO自动生成的catch块
            e.printStackTrace（）;
        }
 

然后得到 SD卡保存的图像并附加在电子邮件的意图是这样的：

 意图shareIntent =新的意图（android.content.Intent.ACTION_SEND）;
        shareIntent.setType（为image / jpeg）;

        shareIntent.putExtra（android.content.Intent.EXTRA_SUBJECT，你好）; //设置你的主题
        shareIntent.putExtra（android.content.Intent.EXTRA_TEXT，你好吗）; //设置你的消息

        串的ImagePath = Environment.getExternalStorageDirectory（）+文件分割符+test.jpg放在;

        文件imageFileToShare =新的文件（的ImagePath）;

        开放的我们的uri = Uri.fromFile（imageFileToShare）;

        shareIntent.putExtra（Intent.EXTRA_STREAM，URI）;

        startActivity（Intent.createChooser（shareIntent，共享图片））;
 

I am trying to attach image from my gridview to gmail or facebook,but whenever i tried to attach my app got crash,and i am getting following error with nullpointer exception,following is my code with gridview image selection,can any one help?

public class Free_Cover_Activity extends AppCompatActivity
{
 GridView grid;
 int[] imageId = {
  R.drawable.discovercover,
  R.drawable.burpresswordfree,
  R.drawable.flyfree,
  R.drawable.cantmovefree,
  R.drawable.cantmovewordfree,
  R.drawable.chalkthisfree,
  R.drawable.fivehundredmetersfree,
  R.drawable.freeexercise,
  R.drawable.gym_smilie,
  R.drawable.hundredcalrairesfree,
  R.drawable.injuryfree,
  R.drawable.jumpropefree,
  R.drawable.nicesnathcfree,
  R.drawable.personglrecordfree,
  R.drawable.posefree,
  R.drawable.pushupfree,
  R.drawable.shoulder,
  R.drawable.timewordfree,
  R.drawable.unbrokernfree,
  R.drawable.weightbeltfree
 };

 private Bitmap mBitmap;
 private Intent email;

 @Override
 protected void onCreate(Bundle savedInstanceState)
 {
  super.onCreate(savedInstanceState);

  setContentView(R.layout.free_cover_gridview);
  android.support.v7.app.ActionBar abar =  getSupportActionBar();
  ColorDrawable colorDrawable = new ColorDrawable(Color.parseColor("#D64365"));
  abar.setBackgroundDrawable(colorDrawable);
  abar.hide();

  CustomGridFreeCover adapter = 
               new CustomGridFreeCover(Free_Cover_Activity.this, imageId);
  grid=(GridView)findViewById(R.id.freecover_grid);
  grid.setAdapter(adapter);
  grid.setOnItemClickListener(new AdapterView.OnItemClickListener()
  {
   @Override
   public void onItemClick(AdapterView<?> parent, View view, int position, long id)
   {
    try
    {
     Bitmap largeIcon = 
         BitmapFactory.decodeResource(getResources(), R.drawable.discovercover);

     /*
     replace "R.drawable.bubble_green" with the image resource 
     you want to share from drawable
     */
     ByteArrayOutputStream bytes = new ByteArrayOutputStream();
     largeIcon.compress(Bitmap.CompressFormat.JPEG, 40, bytes);

     //you can create a new file name "test.jpg" in sdcard folder.
     File f = 
        new File(Environment.getExternalStorageDirectory() + File.separator + "test.jpg");
     f.createNewFile();

     //write the bytes in file
     FileOutputStream fo = new FileOutputStream(f);
     fo.write(bytes.toByteArray());

     //remember close de FileOutput
     fo.close();
    } catch (IOException e) {
     //TODO Auto-generated catch block
     e.printStackTrace();
    }

    Intent shareIntent = new Intent(android.content.Intent.ACTION_SEND);
    shareIntent.setType("image/jpeg");
    //set your subject
    shareIntent.putExtra(android.content.Intent.EXTRA_SUBJECT, "Hi"); 
    //set your message
    shareIntent.putExtra(android.content.Intent.EXTRA_TEXT, "How are you"); 

    String imagePath = Environment.getExternalStorageDirectory() 
           + File.separator + "test.jpg";
    File imageFileToShare = new File(imagePath);
    Uri uri = Uri.fromFile(imageFileToShare);
    shareIntent.putExtra(Intent.EXTRA_STREAM, uri);
    startActivity(Intent.createChooser(shareIntent, "Share Image"));
   }
  });
 }

 public class CustomGridFreeCover extends BaseAdapter
 {
  private Context mContext;
  //private final String[] web;
  private final int[] Imageid;

  public CustomGridFreeCover(Context c,int[] Imageid )
  {
   mContext = c;
   this.Imageid = Imageid;
   //this.web = web;
  }

  @Override
  public int getCount()
  {
   //TODO Auto-generated method stub
   return Imageid.length;
  }

  @Override
  public Object getItem(int position) {
   //TODO Auto-generated method stub
   return null;
  }

  @Override
  public long getItemId(int position) {
   //TODO Auto-generated method stub
   return 0;
  }

  @Override
  public View getView(int position, View convertView, ViewGroup parent)
  {
   //TODO Auto-generated method stub
   View grid;
   LayoutInflater inflater = (LayoutInflater) mContext
    .getSystemService(Context.LAYOUT_INFLATER_SERVICE);

    if (convertView == null)
    {
     grid = new View(mContext);
     grid = inflater.inflate(R.layout.free_cover_griditem, null);
     //TextView textView = (TextView) grid.findViewById(R.id.grid_text);
     ImageView imageView = (ImageView)grid.findViewById(R.id.grid_image_freecover);
     //textView.setText(web[position]);
     imageView.setImageResource(Imageid[position]);
    } else {
     grid = (View) convertView;
    }
   return grid;
  }
 }
}

解决方案

Here is the working code which you need:

Firstly save image from Drawable to SD Card here is the code:

try{

Bitmap largeIcon = BitmapFactory.decodeResource(getResources(), R.drawable.bubble_green);

            //replace "R.drawable.bubble_green" with the image resource you want to share from drawable 

            ByteArrayOutputStream bytes = new ByteArrayOutputStream();
            largeIcon.compress(Bitmap.CompressFormat.JPEG, 40, bytes);

            // you can create a new file name "test.jpg" in sdcard folder.
            File f = new File(Environment.getExternalStorageDirectory() + File.separator + "test.jpg");

            f.createNewFile();

            // write the bytes in file
            FileOutputStream fo = new FileOutputStream(f);
            fo.write(bytes.toByteArray());

            // remember close de FileOutput
            fo.close();
        }
        catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

Then get the saved image from SD card and attach in the email intent like this:

        Intent shareIntent = new Intent(android.content.Intent.ACTION_SEND);
        shareIntent.setType("image/jpeg");

        shareIntent.putExtra(android.content.Intent.EXTRA_SUBJECT, "Hi"); //set your subject
        shareIntent.putExtra(android.content.Intent.EXTRA_TEXT, "How are you"); //set your message

        String imagePath = Environment.getExternalStorageDirectory() + File.separator + "test.jpg";

        File imageFileToShare = new File(imagePath);

        Uri uri = Uri.fromFile(imageFileToShare);

        shareIntent.putExtra(Intent.EXTRA_STREAM, uri);

        startActivity(Intent.createChooser(shareIntent, "Share Image"));

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