我解决我的问题@AkashG把你的code在MediaPlay.setOnErrorListener（）

I solved my problem @AkashG by putting your code in MediaPlay.setOnErrorListener()

AlertDialog.Builder builder=new Builder(YourActivityName.this);
        builder.setTitle("Video");
        builder.setMessage("Message you want to pass");
        builder.setPositiveButton("Download", new DialogInterface.OnClickListener() {

            public void onClick(DialogInterface dialog, int which) {
                // TODO Auto-generated method stub

            }
        });
        builder.setNegativeButton("Play", new DialogInterface.OnClickListener() {

            public void onClick(DialogInterface dialog, int which) {
                // TODO Auto-generated method stub

            }
        });
        builder.create();
        builder.show();