android 带EditView（编辑框）的AlertDialog（对话框）及获取输入内容

final EditText et = new EditText(this);  new AlertDialog.Builder(this).setTitle("搜索").setIcon(android.R.drawable.ic_dialog_info).setView(et).setPositiveButton("确定", new OnClickListener() {public void onClick(DialogInterface dialog, int which) {String input = et.getText().toString();if (input.equals("")) {Toast.makeText(getApplicationContext(), "搜索内容不能为空！" + input, Toast.LENGTH_LONG).show();}else {Intent intent = new Intent();intent.putExtra("content", input);intent.setClass(MainActivity.this, SearchActivity.class);startActivity(intent);}}}).setNegativeButton("取消", null).show();