如何在Android中添加标题与图像共享Instagram的？

Question

这是我的代码。我想添加标题与图像。请帮帮我。

private void shareInstagram(Uri uri){ 

    Intent shareIntent = new Intent(android.content.Intent.ACTION_SEND); 
    shareIntent.setType("image/*"); // set mime type 
    shareIntent.putExtra(Intent.EXTRA_STREAM,uri); // set uri 
    shareIntent.putExtra(Intent.EXTRA_TITLE, "Sample title"); 

    shareIntent.setPackage("com.instagram.android"); 

    startActivity(shareIntent); 
      } 

Answer 1

你应该在图像上写上标题，然后创建uri。

private Bitmap writeTextOnDrawable(int drawableId, String text) { 

     Bitmap bm = BitmapFactory.decodeResource(getResources(), drawableId) 
       .copy(Bitmap.Config.ARGB_8888, true); 

     Typeface tf = Typeface.create("Helvetica", Typeface.BOLD); 

     Paint paint = new Paint(); 
     paint.setStyle(Style.FILL); 
     paint.setColor(Color.WHITE); 
     paint.setTypeface(tf); 
     paint.setTextAlign(Align.CENTER); 
     paint.setTextSize(convertToPixels(mContext, 11)); 

     Rect textRect = new Rect(); 
     paint.getTextBounds(text, 0, text.length(), textRect); 

     Canvas canvas = new Canvas(bm); 

     //If the text is bigger than the canvas , reduce the font size 
     if(textRect.width() >= (canvas.getWidth() - 4))  //the padding on either sides is considered as 4, so as to appropriately fit in the text 
      paint.setTextSize(convertToPixels(mContext, 7));  //Scaling needs to be used for different dpi's 

     //Calculate the positions 
     int xPos = (canvas.getWidth()/2) - 2;  //-2 is for regulating the x position offset 

     //"- ((paint.descent() + paint.ascent())/2)" is the distance from the baseline to the center. 
     int yPos = (int) ((canvas.getHeight()/2) - ((paint.descent() + paint.ascent())/2)) ; 

     canvas.drawText(text, xPos, yPos, paint); 

     BitmapDrawable bmd = new BitmapDrawable(getResources(), bm); 
    Bitmap newbit; 
               newbit=bmd.getBitmap(); 
return newbit; 
    } 
    public static int convertToPixels(Context context, int nDP) 
    { 
     final float conversionScale = context.getResources().getDisplayMetrics().density; 

     return (int) ((nDP * conversionScale) + 0.5f) ; 

    } 

裁判：Add text to image in android programmatically

---

保存位图到文件：

Uri.fromFile(new File(<your image absolute path>)); 

：

Save bitmap to file function

---

从文件创建URI

---

此URI传递给你的函数

private void shareInstagram(Uri uri){ 

    Intent shareIntent = new Intent(android.content.Intent.ACTION_SEND); 
    shareIntent.setType("image/*"); // set mime type 
    shareIntent.putExtra(Intent.EXTRA_STREAM,uri); // set uri 
    shareIntent.putExtra(Intent.EXTRA_TITLE, "Sample title"); 

    shareIntent.setPackage("com.instagram.android"); 

    startActivity(shareIntent); 
      } 

希望它应该工作