AlertDialog的简单使用

 findViewById(R.id.button).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                AlertDialog dialog = new AlertDialog.Builder(MainActivity.this).create();
                dialog.setTitle("title");
                dialog.setMessage("message");
                dialog.setButton("去百度", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        Uri uri = Uri.parse("http://www.baidu.com");
                        Intent intent = new Intent(Intent.ACTION_VIEW, uri);
                        MainActivity.this.startActivity(intent);
                    }
                });
                dialog.setButton2("关闭", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {

                    }
                });
                dialog.show();
            }
        });

　　调用一个AlertDialog，显示选择跳到baidu首页，关闭则不做任何事情

  view.findViewById(R.id.button2).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                LayoutInflater inflater1 = getActivity().getLayoutInflater();
                final View View_Dialog1 = inflater.inflate(R.layout.fragment_main, null);
                final EditText text = (EditText) View_Dialog1.findViewById(R.id.fragment_edit);
                AlertDialog dialog = new AlertDialog.Builder(getActivity()).create();
                dialog.setView(View_Dialog1);
                dialog.setTitle("title");
                dialog.setButton("Do a toast", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        String str = text.getText().toString();
                        Toast.makeText(getActivity(), "this is a ...... " + str, Toast.LENGTH_SHORT).show();
                    }
                });
                dialog.show();
            }
        });

 自定义一个布局文件去加载。获得布局文件中的控件，并获得edittext的值。