如何在android中动态播放音频文件

Question

我有listview的动态音频文件列表存储在sd卡的特定文件夹中，当用户点击一个特定的文件我将在onItemClick方法的int中获取位置我需要创建警告对话框，首先是两个按钮播放该特定位置的特定文件，其次是删除该文件。怎么做？

Answer 1

使用onItemClickListener注册您的列表，并在该方法中填充一个包含2个按钮的对话框

这里有一些代码：

mylistview.setOnItemClickListener(new OnItemClickListener() {

        @Override
        public void onItemClick(AdapterView<?> arg0, View view, int position,
                long id) {

            String file_path_in_the_sd_card = YOURADAPTER.getFilePathAtPosition(position);

            AlertDialog.Builder builder = new AlertDialog.Builder(this);
            builder.setMessage("Option")
                   .setCancelable(false)
                   .setPositiveButton("Play", new DialogInterface.OnClickListener() {
                       public void onClick(DialogInterface dialog, int id) {
                           //start the activity the will play the song and provide the path to it 

                       }
                   })
                   .setNegativeButton("Delete", new DialogInterface.OnClickListener() {
                       public void onClick(DialogInterface dialog, int id) {
                           //make a code that will delete the file maybe like this 
                           File file = new File(file_path_in_sd_card);
                           file.delete();

                           //remove it aslo from your adapter 

                           myadpter.removeFile(poistion);
                           myadpater.notifyDataSetChange();

                            dialog.cancel();
                       }
                   });
            AlertDialog alert = builder.create();




}

这段代码可以帮助您思考如何完成这项工作，而不是一个完整的例子。