Android 調用系統的分享界面，進行文件分享

 //分享文字  
    public void shareText(View view) {  
        Intent shareIntent = new Intent();  
        shareIntent.setAction(Intent.ACTION_SEND);  
        shareIntent.putExtra(Intent.EXTRA_TEXT, "text內容.");  
        shareIntent.setType("text/plain");  
  
        //設置標題（彈出分享列表的界面標題），
        startActivity(Intent.createChooser(shareIntent, "分享到"));  
    }  
  
    //分享一張圖片  
    public void shareSingleImage(View view) {  
        String imagePath = Environment.getExternalStorageDirectory() + File.separator + "aaa.jpg";  
        //由文件得到uri  
        Uri imageUri = Uri.fromFile(new File(imagePath));  //imagePath--本地的文件路徑
        Log.d("share", "uri:" + imageUri);  
  
        Intent shareIntent = new Intent();  
        shareIntent.setAction(Intent.ACTION_SEND);  
        shareIntent.putExtra(Intent.EXTRA_STREAM, imageUri);  
        shareIntent.setType("image/*");  
        startActivity(Intent.createChooser(shareIntent, "分享到："));  
    }  
  
    //分享多張圖片  （保存一個集合）
    public void shareMultipleImage(View view) {  
        ArrayList<Uri> uriList = new ArrayList<>();  
  
        String path = Environment.getExternalStorageDirectory() + File.separator;  
        uriList.add(Uri.fromFile(new File(filePath+"aaa-1.jpg")));  
        uriList.add(Uri.fromFile(new File(filePath+"aaa-2.jpg")));  
        uriList.add(Uri.fromFile(new File(filePath+"aaa-3.jpg")));  
  
        Intent shareIntent = new Intent();  
        shareIntent.setAction(Intent.ACTION_SEND_MULTIPLE);  
        shareIntent.putParcelableArrayListExtra(Intent.EXTRA_STREAM, uriList);  
        shareIntent.setType("image/*");  
        startActivity(Intent.createChooser(shareIntent, "分享到："));  
    }  
}  

//分享所有類型文件：

 Intent shareIntent = new Intent(Intent.ACTION_SEND);
 shareIntent.putExtra(Intent.EXTRA_STREAM,
 Uri.fromFile(new File(filePath)));
 shareIntent.setType("*/*");//此處可發送多種文件
 startActivity(Intent.createChooser(shareIntent, “分享到：”));
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作者：假裝我在飛 
來源：CSDN 
原文：https://blog.csdn.net/yuzhidao/article/details/75267627 
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Android分享---調用系統自帶的分享功能https://blog.csdn.net/s13383754499/article/details/81943895