Android开发实用代码片段合集

1.退出程序对话框提示

@Override 
    public boolean onKeyDown(int keyCode, KeyEvent event) { 
        if (keyCode == KeyEvent.KEYCODE_BACK && event.getRepeatCount() == 0) { 
            dialog(); 
            return false; 
        } 
        return false; 
    }



 protected void dialog() { 
        AlertDialog.Builder builder = new Builder(Player.this); 
        builder.setMessage("确定要退出吗?"); 
        builder.setTitle("提示"); 
        builder.setPositiveButton("确认", 
                new DialogInterface.OnClickListener() { 
                    @Override 
                    public void onClick(DialogInterface dialog, int which) { 
                        dialog.dismiss(); 
                        Player.this.finish(); 
                    } 
                }); 
        builder.setNegativeButton("取消", 
                new DialogInterface.OnClickListener() { 
                    @Override 
                    public void onClick(DialogInterface dialog, int which) { 
                        dialog.dismiss();