Android初学者制作的小界面，有哪些高手建议？

本文共计903个文字，预计阅读时间需要4分钟。

点击按钮会有相应的提示信息，界面较为简洁。代码如下：

javapublic class MainActivity extends AppCompatActivity { Button confirm, cancel; EditText usrname; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); confirm=findViewById(R.id.confirm); cancel=findViewById(R.id.cancel); usrname=findViewById(R.id.usrname); }}

点击按钮会有相应的提示信息 写得比较粗糙

public class MainActivity extends AppCompatActivity { Button confirm,cancel; EditText usrname; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); confirm = (Button) findViewById(R.id.confirmbtn); cancel = (Button) findViewById(R.id.cancelbtn); usrname = (EditText) findViewById(R.id.inputname); confirm.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { if(usrname.getText().toString().isEmpty() == false) { Toast.makeText(MainActivity.this, "Name " + usrname.getText().toString() + " confirmed.", Toast.LENGTH_LONG).show(); } else{ Toast.makeText(MainActivity.this, "No confirmed.", Toast.LENGTH_LONG).show(); } } }); cancel.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Toast.makeText(MainActivity.this,"Canceled.",Toast.LENGTH_LONG).show(); } }); } } MainActivity.java

package com.example.liugc.mysecondapplication; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.View; import android.widget.ArrayAdapter; import android.widget.Button; import android.widget.EditText; import android.widget.GridView; import android.widget.ListView; import android.widget.Toast; public class MainActivity extends AppCompatActivity { Button confirm,cancel; EditText usrname; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); confirm = (Button) findViewById(R.id.confirmbtn); cancel = (Button) findViewById(R.id.cancelbtn); usrname = (EditText) findViewById(R.id.inputname); confirm.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { if(usrname.getText().toString().isEmpty() == false) { Toast.makeText(MainActivity.this, "Name " + usrname.getText().toString() + " confirmed.", Toast.LENGTH_LONG).show(); } else{ Toast.makeText(MainActivity.this, "No confirmed.", Toast.LENGTH_LONG).show(); } } }); cancel.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Toast.makeText(MainActivity.this,"Canceled.",Toast.LENGTH_LONG).show(); } }); } } activity_main.xml

捕获.PNG